MAX14777GTP+T - Maxim Integrated

General Description

The MAX14777 quad SPST switch supports analog

signals above and below the rails with a single 3.0V to

5.5V supply. The device features a selectable -15V/+35V

or -15V/+15V analog signal range for all switches. Each

switch has a separate control input to allow independent

switching, making the device an alternative to opto-relays

in applications that do not need galvanic isolation.

The IC features 10Ω (max) on-resistance, and 9mΩ (typ)

RON flatness, along with a low 50nA (max at +85°C) on-

leakage. For maximum signal integrity, the device keeps

this performance over the entire common-mode voltage

range. Each switch can carry up to 60mA (max) of con-

tinuous current in either direction.

The MAX14777 is available in a 20-pin (4mm x 4mm)

TQFN package and is specified over the -40°C to +105°C

temperature range.

Applications

● Industrial Measurement Systems

● Instrumentation Systems

● 4–20mA Switching

● ATE Systems

Benets and Features

● Simple, Flexible Board Design

• -15V/+35V Beyond-the-Rails™ Signal Range from

a Single 3.0V to 5.5V Supply

• Selectable -15V/+15V Signal Range for Lower

Supply Current

• 60mA Maximum Current through Each Switch

• 1.62V to 5.5V Logic Interface

● High-Performance 10Ω RON (max)

● 150mΩ (max) RON Flatness

● ±50nA (max) On-Leakage at TA = +85°C

● Saves Board Space

• Small 20-Pin TQFN Package (4mm x 4mm)

● -40°C to +105°C Operating Temperature Range

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part, refer to www.maximintegrated.com/MAX14777 related.

Beyond-the-Rails is a registered trademark of Maxim Integrated

Products, Inc.

CONFIG BIAS

GENERATION

SEL35

VCC

EN4EN3

EN2EN1

MAX14777

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

19-6714; Rev 1; 10/13

Functional Diagram

(All voltages referenced to GND, unless otherwise noted.)

VCC ..........................................................................-0.3V to +6V

VL ............................................................................-0.3V to +6V

EN1, EN2, EN3, EN4, SEL35, I.C. ..........................-0.3V to +6V

A1, A2, A3, A4, B1, B2, B3, B4 ........ (VN - 0.3V) to the lesser of

(VP + 0.3V) and (VN + 70V)

SEL35 = High ..................................................... -0.3V to +70V

SEL35 = Low......................................................-0.3V to +48V

VP to VN ................................................................-0.3V to +70V

VN .......................... the greater of -26V and (VP - 70V) to +0.3V

Absolute Difference Between Switch I/Os (| A_ - B_ |) .........70V

Continuous Current ..........................................................±80mA

Continuous Power Dissipation (TA = +70°C) ..............................

TQFN (derate 25.6mW/°C above +70°C) ...............2051.3mW

Operating Temperature Range .......................... -40ºC to +105ºC

Junction Temperature ...................................................... +150ºC

Storage Temperature Range .............................-65ºC to +150°C

Lead Temperature (soldering, 10s) ................................. +300°C

Soldering Temperature (reflow) .......................................+260°C

Junction-to-Ambient Thermal Resistance (θJA)

TQFN ...........................................................................39°C/W

Junction-to-Case Thermal Resistance (θJC)

TQFN .............................................................................6°C/W

(Note 1)

(VCC = 3.0V to 5.5V, VL = 3.3V, TA = -40°C to +105°C, unless otherwise noted. Typical values are at VCC = 5V and TA = +25°C.)

(Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC CHARACTERISTICS

Supply Voltage Range VCC 3.0 5.5 V

VL Supply Voltage Range VL1.62 5.5 V

VCC Supply Current ICC

VCC = 3.3V,

VEN_ = VL

SEL35 = low 1.8 3.4

SEL35 = high 2.2 4.3

VCC = 5.5V,

VEN_ = VL

SEL35 = low 0.6 1.2

SEL35 = high 0.8 1.65

VL Supply Current ILSEL35, EN_ = low or high -1 +1 µA

Analog Signal Range VA_ ,VB_SEL35 = low -15 +15 V

SEL35 = high -15 +35

Positive High-Voltage Charge-

Pump Output (Note 3) VP

SEL35 = low 22.5 27.1 V

SEL35 = high 41.7 49.8

Negative High-Voltage Charge-

Pump Output VN(Note 3) -18.2 -14.9 V

Continuous Current Through

Switch IA_ EN_ = high -60 +60 mA

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.

Absolute Maximum Ratings

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these

or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect

device reliability.

Package Thermal Characteristics

Electrical Characteristics

(VCC = 3.0V to 5.5V, VL = 3.3V, TA = -40°C to +105°C, unless otherwise noted. Typical values are at VCC = 5V and TA = +25°C.)

(Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

On-Resistance, Figure 1 RON

-15V ≤ VA_ ≤ +35V, SEL35 = high,

IIN = ±60mA, Figure 1 4.4 10

-15V ≤ VA_ ≤ +15V, SEL35 = low,

IIN = ±60mA, Figure 1 4.4 10

On-Resistance Flatness ΔRON

-15V ≤ VA_ ≤ +35V, SEL35 = high,

IIN = ±60mA 9150

mΩ

-15V ≤ VA_ ≤ +15V, SEL35 = low,

IIN = ±60mA 8150

On-Resistance Matching

Between Channels ΔRON_M

-15V ≤ VA_ ≤ +35V, SEL35 = high,

IIN = ±60mA, (Note 4) 200

mΩ

-15V ≤ VA_ ≤ +15V, SEL35 = low,

IIN = ±60mA, (Note 4) 200

A_ Off-Leakage Current IL_OFF_A

-15V ≤ VA_ ≤ +35V, SEL35 = high,

VB_ = 0V, +40°C ≤ TA ≤ +85°C,

Figure 2

-20 +20

-15V ≤ VA_ ≤ +35V, SEL35 = high,

VB_ = 0V, +40°C ≤ TA ≤ +105°C,

Figure 2

-80 +80

B_ Off-Leakage Current IL_OFF_B

-15V ≤ VB _ ≤ +35V, SEL35 = high,

VA_ = 0V, +40°C ≤ TA ≤ +85°C,

Figure 2

-20 +20

-15V ≤ VB_ ≤ +35V, SEL35 = high,

VA_ = 0V, +40°C ≤ TA ≤ +105°C,

Figure 2

-80 +80

On-Leakage Current IL_ON

-15V ≤ VA_ ≤ +35V, SEL35 = high,

B_ unconnected, +40°C ≤ TA ≤

+85°C, Figure 2

-50 +50

-15V ≤ VA_ ≤ +35V, SEL35 = high,

B_ unconnected, +40°C ≤ TA ≤

+105°C, Figure 2

-200 +200

A_ Power-Off Leakage Current IL_PWROFF_A

VCC_ = 0V or

unconnected,

|VA_ - VB_| > 3V,

current measured at A

-15V ≤ VA_

≤ +35V -5 +5 µA

B_ Power-Off Leakage Current IL_PWROFF_B

VCC_ = 0V or

unconnected,

|VA_ - VB_| > 3V,

current measured at B

-15V ≤ VA_

≤ +35V -5 +5 µA

DIGITAL LOGIC (EN1, EN2, EN3, EN4, SEL35)

Input Voltage Low VIL 0.3 x

Input Voltage High VIH 0.7 x

Input Leakage Current IDLKG VEN_ = low or high -1 +1 µA

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Electrical Characteristics (continued)

(VCC = 3.0V to 5.5V, VL = 3.3V, TA = -40°C to +105°C, unless otherwise noted. Typical values are at VCC = 5V and TA = +25°C.)

(Note 2)

Note 2: All units are 100% production tested at +85°C. Specifications over temperature are guaranteed by design.

Note 3: Do not use VP or VN to power external circuitry.

Note 4: Tested at -1V, guaranteed by design for -15V ≤ VA_ ≤ +35V.

Note 5: This parameter does not depend on the status of SEL35.

Note 6: Power-up time is the time needed of VP and VN to reach steady-state values.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

AC CHARACTERISTICS

Power-Up Time tPWRON CVP = CVN = 10nF (Note 6) 5ms

Enable Turn-On Time tON

VA_ = ±10V, SEL35 = low,

RL = 10kΩ, Figure 3 40

µs

VA_ = ±10V, SEL35 = high,

RL = 10kΩ, Figure 3 40

Enable Turn-Off Time tOFF

VA_ = ±10V, RL = 10kΩ, Figure 3

(Note 5) 100 µs

Off-Isolation VISO

VA_ = 1VRMS,

f = 100kHz,

RL = 50Ω,

CL = 15pF,

Figure 4

VCC = 3V to

5.5V -88

VCC = 0V or

unconnected -66

Crosstalk VCT

VA_ = 1VRMS,

f = 100kHz,

RS = RL = 50Ω,

Figure 5

VCC = 3V to

5.5V -101

VCC = 0V or

unconnected -93

-3dB Bandwidth BW VA_ = 1VP-P, RS = RL = 50Ω,

Figure 6 380 MHz

Total Harmonic Distortion THD+N RS = RL = 1kΩ, f = 20Hz to 20kHz 0.038 %

Charge Injection Q VA_ = GND, CL = 1nF, Figure 7 225 pC

Input Capacitance

CON A_, B_ pins, f = 1MHz 16 pF

COFF At A_ when B_ = GND, or at B_

when A_ = GND, f = 1MHz 12 pF

THERMAL SHUTDOWN

Thermal Shutdown Threshold TSHDN Temperature rising 160 °C

Thermal Shutdown Hysteresis THYST 32 °C

ESD PROTECTION

All Pins Human Body Model ±2 kV

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Electrical Characteristics (continued)

Figure 1. On-Resistance Measurement

Figure 2. Leakage Current Measurements

A_ B_

IIN

VCC

GND

MAX14777

+5V+3.3V

1µF

VIN

IL_OFF

VCC

GND

MAX14777

+5V

1µF

+3.3V

1µF

VCC

+5V

1µF

+3.3V

1µF

IL_OFF

VIN

IL_ON

GND

MAX14777

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Test Circuits/Timing Diagrams

Figure 3. Enable Switching Time

Figure 4. Off-Isolation

MAX14777 VOUT

B_EN_

A_ +10V

VCC

+5V

GND

1µF1µF

+3.3V

EN_

50%

tR < 20ns

tF < 20ns

tON tOFF

90%

10%

+5V

VOUT

10kΩ50Ω

MAX14777

VOUT

VIN

EN_ SWITCH

OPEN

VCC

+5V

GND

1µF1µF

+3.3V

RL = 50ΩCL = 15pF

RS = 50Ω

OFF-ISOLATION = 20log VOUT

VIN

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Test Circuits/Timing Diagrams (continued)

Figure 5. Crosstalk

Figure 6. Frequency Response

MAX14777

VOUT

A1 EN1

SWITCH 2 OPEN

SWITCH 1 CLOSED

VCC

+5V

GND

1µF1µF

+3.3V

EN2

RL = 50Ω

RS = 50Ω

VIN

CROSSTALK = 20log VOUT

VIN

NETWORK

ANALYZER

VIN

VOUT MEAS REF

MAX14777

EN_

VCC

+5V

GND

1µF1µF

+3.3V

ON-LOSS = 20log VOUT

VIN

+5V

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Test Circuits/Timing Diagrams (continued)

(VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.)

Figure 7. Charge Injection

MAX14777 VOUT

EN_

VCC

+5V

GND

1µF1µF

+3.3V

CL = 1nF

50Ω

ON ONOFF

+5V

VEN

VOUT

VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE

TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF.

Q = CL × VOUT

-VOUT

ON-RESISTANCE vs. VB_

MAX14777 toc01

VB_ (V)

ON-RESISTANCE (Ω)

25155-5

4.25

4.30

4.35

4.40

4.20

-15 35

SEL35 = HIGH

ILOAD = 60mA

VCC = 5V

VCC = 3.3V

ON-RESISTANCE vs. VB_

MAX14777 toc02

VB_ (V)

ON-RESISTANCE (Ω)

25155-5

-15 35

SEL35 = HIGH

ILOAD = 60mA

TA = +105ºC

TA = +125ºC

TA = -40ºC

TA = +85ºC

TA = +25ºC

OFF-LEAKAGE CURRENT

vs. TEMPERATURE

MAX14777 toc03

TEMPERATURE (ºC)

OFF-LEAKAGE CURRENT (nA)

1109580655035205-10-25

0.01

0.1

100

0.001

-40 125

SEL35 = HIGH

VA_ = 35V

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Test Circuits/Timing Diagrams (continued)

Typical Operating Characteristics

(VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.)

OFF-LEAKAGE CURRENT

vs. TEMPERATURE

MAX14777 toc04

TEMPERATURE (ºC)

ON-LEAKAGE CURRENT (nA)

1109580655035205-10-25

0.01

0.1

100

0.001

-40 125

SEL35 = HIGH

VA_ = 35V

SUPPLY CURRENT

vs. TEMPERATURE

MAX14777 toc06

TEMPERATURE (ºC)

SUPPLY CURRENT (mA)

1109580655035205-10-25

0.2

0.4

0.6

0.8

1.0

1.2

-40 125

SEL35 = LOW

VEN_ = VL

SEL35 = HIGH

OFF-ISOLATION vs. FREQUENCY

MAX14777 toc08

FREQUENCY (MHz)

OFF-ISOLATION (dB)

101

-90

-80

-70

-60

-50

-40

-30

-20

-10

-100

0.1 100

CHARGE INJECTION

vs. ANALOG SIGNAL VOLTAGE

MAX14777 toc05

ANALOG SIGNAL VOLTAGE (V)

CHARGE INJECTION (pC)

25155-5

100

150

200

250

300

350

400

450

-15 35

TA = +105ºC

TA = +125ºC

TA = -40ºC

TA = +25ºC

TA = +85ºC

FREQUENCY (MHz)

CROSSTALK (dB)

1010.1 100

CROSSTALK vs. FREQUENCY

MAX14777 toc07

-100

-80

-60

-40

-20

-120

FREQUENCY RESPONSE

MAX14777 toc09

FREQUENCY (MHz)

FREQUENCY RESPONSE (dB)

101

-4.5

-4.0

-3.5

-3.0

-2.5

-2.0

-1.5

-1.0

-0.5

-5.0

0.1 100

RS = RL = 50Ω

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

Maxim Integrated

│

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Typical Operating Characteristics (continued)

(VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.)

THD+N vs. FREQUENCY

MAX14777 toc10

FREQUENCY (kHz)

THD+N (%)

0.2 2

0.01

0.1

0.001

0.02 20

RS = RL = 1kΩ

FREQUENCY (MHz)

PSRR (dB)

1010.1 100

PSRR vs. FREQUENCY

MAX14777 toc11

-100

-80

-60

-40

-20

-120

TURN-ON TIME

vs. ANALOG SIGNAL VOLTAGE

MAX14777 toc12

ANALOG SIGNAL VOLTAGE (V)

TURN-ON TIME (µs)

25155-5

-15 35

SEL35 = HIGH

RL = 10kΩ

SEL35 = LOW

TURN-OFF TIME

vs. ANALOG SIGNAL VOLTAGE

MAX14777 toc13

ANALOG SIGNAL VOLTAGE (V)

TURN-OFF TIME (µs)

25155-5

-15 35

SEL35 = HIGH

RL = 10kΩ

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

Maxim Integrated

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Typical Operating Characteristics (continued)

MAX14777

TQFN

4mm x 4mm

TOP VIEW

20 *EP

GND

VCC

I.C.

EN3

EN2

EN1

EN4

1 2

4 5

15 14 12 11

*EP = EXPOSED PAD. CONNECT EP TO VN.

VNVL

16 10 SEL35

N.C.

PIN NAME FUNCTION

1 VP

Positive Charge-Pump Output. Bypass VP to GND with a 10nF, 50V capacitor for applications with an

input range of ±15V (SEL35 = low) or a 100V capacitor for applications with an input range of -15V/+35V

(SEL 35 = high). Place the capacitor as close as possible to the device.

2GND Ground

3 VNNegative Charge-Pump Output. Bypass VN to GND with a 50V, 10nF ceramic capacitor placed as close

as possible to the device.

4 VCC Power-Supply Input. Bypass VCC to GND with a 1μF ceramic capacitor placed as close as possible to the

device.

5 I.C. Internally Connected. Connect to GND.

6 A1 Analog Switch 1 Terminal A. Switch 1 is open when EN1 is low.

7 A2 Analog Switch 2 Terminal A. Switch 2 is open when EN2 is low.

8A3 Analog Switch 3 Terminal A. Switch 3 is open when EN3 is low.

9A4 Analog Switch 4 Terminal A. Switch 4 is open when EN4 is low.

10 SEL35 Analog-Signal Range Select Input. Drive SEL35 low to enable the -15V/+15V analog signal range. Drive

SEL35 high to enable the -15V/+35V analog signal range.

11 EN1 Switch 1 Control Input. Drive EN1 high to close switch 1. Drive EN1 low to open switch 1.

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Pin Conguration

Detailed Description

The MAX14777 quad SPST switch supports analog

signals above and below the rails with a single 3.0V to

5.5V supply. The device features up to -15V/+35V analog

signal range for all switches when pin SEL35 is high.

When pin SEL35 is low, the analog signal range reduces

to -15V/+15V signal range, also resulting in a lower VCC

supply current. SEL35 trades off high-side analog signal

range for supply current. Each switch has a separate con-

trol input to allow independent switching.

The MAX14777 features 10Ω (max) on-resistance, and

9mΩ (typ) RON flatness, along with a 50nA (max at

+85°C) on-leakage. For maximum signal integrity, the IC

keeps this performance over the entire common-mode

voltage range. Each switch can carry up to 60mA (max)

of continuous current in either direction.

Integrated Bias Generation

The MAX14777 contains a total of three charge pumps to

generate bias voltages for the internal switches: a 5V reg-

ulated charge pump, a positive high-voltage charge pump

(VP), and a negative high-voltage charge pump (VN).

When VCC is above 4.75V (typ), the 5V charge pump is

bypassed and VCC provides the input for the high-voltage

charge pumps, reducing overall supply current.

The voltage at VN is always -16V (typ); however, the

MAX14777 features a pin-selectable (SEL35) voltage-

high range for the analog signal. When the SEL35 input is

low, the voltage on VP is +26V (typ) and the analog signal

range is -15V/+15V. When the SEL35 input is high, the

voltage on VP is +46V (typ) and the analog signal range

is extended to -15V/+35V.

An external 10nF capacitor is required for each high-

voltage charge pump between VP/VN and GND. Use a

50V-rated capacitor on VN. On VP use a 50V capacitor

if SEL35 = low or use a 100V capacitor if SEL35 = high.

Never use VP or VN to power external circuitry.

Analog Signal Levels

The MAX14777 transmits signals above and below the

rails with a single 3.0V to 5.5V supply due to its integrated

bias circuitry. The analog signal range is pin selectable

using the SEL35 input. Drive SEL35 low to switch signals

between -15V and +15V. Drive SEL35 high to switch

signals between -15V and +35V.

Setting SEL35 low reduces both turn-on delay and VCC

supply current.

The MAX14777 features 10Ω (max) on-resistance and

9mΩ (typ) RON flatness for analog signals between -15V

and +35V. The current flow through the switches can be

bidirectional.

PIN NAME FUNCTION

12 EN2 Switch 2 Control Input. Drive EN2 high to close switch 2. Drive EN2 low to open switch 2.

13 VLLogic Interface Reference Supply Input. Bypass VL to GND with a 1µF ceramic capacitor.

14 EN3 Switch 3 Control Input. Drive EN3 high to close switch 3. Drive EN3 low to open switch 3.

15 EN4 Switch 4 Control Input. Drive EN4 high to close switch 4. Drive EN4 low to open switch 4.

16 N.C. No Connection. Not internally connected.

17 B4 Analog Switch 4 Terminal B. Switch 4 is open when EN4 is low.

18 B3 Analog Switch 3 Terminal B. Switch 3 is open when EN3 is low.

19 B2 Analog Switch 2 Terminal B. Switch 2 is open when EN2 is low.

20 B1 Analog Switch 1 Terminal B. Switch 1 is open when EN1 is low.

— EP Exposed Pad. Connect EP to VN. Do not connect to ground. EP is not intended as an electrical

connection point.

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Pin Description (continued)

VL Supply Logic Input

The MAX14777 features a separate logic supply input

(VL) that sets the high and low thresholds for the logic

inputs (EN_ and SEL35). This feature allows flexibility in

interfacing to controllers that have a different logic level

than VCC. Connect VL to a voltage between 1.62V and

5.5V for normal operation.

Applications Information

Non-Powered Condition

To understand the behavior of the MAX14777 when not

powered (i.e. VCC = 0V), both the transient and DC signal

conditions should be considered. Every A_ and B_ pin

has internal diodes to VP and VN, as shown in Figure 8.

Applying a positive voltage on A_ or B_ charges the VP

capacitor through the diode to VP. Applying a negative

voltage on A_ or B_ charges the VN capacitor negative

through the diode to VN. Switch terminals A_, B_ are tol-

erant to high-voltage signals ranging from -15V to +35V

when device is unpowered; i.e, VCC = 0 or VCC floating.

Once the capacitor is charged to a DC voltage, the

IL_IO_OFF current flows. Thus, under transient conditions,

applying a changing voltage to an A_ or B_ pin results in

flow into or out of the pin due to a charge movement at

the external capacitors on VP and VN.

Under DC conditions, when a voltage is applied to an A_

or B_ pin, with VCC unpowered, the switch is open when

the voltage difference between the A_and B_ pin is larger

than 3V. Under these conditions, DC leakage current

flows into the pin. When |VA - VB| < 3V DC, the switch

is not fully open, and currents up to a few mA can flow

between A_ and B_.

If SEL35 is connected low, the VP capacitor charges to

about 25V. Applying a positive voltage above about 25V

on A_ or B_ charges the VP capacitor through the diode

to VP. Once the VP capacitor is charged to this increased

voltage, current flow from A_ or B_ ceases. Thus, even

when SEL35 is low, any of A_ or B_ tolerate voltages up

to 35V.

Figure 8. Typical Application Circuit

A1 B1

A2 B2

A3 B3

A4 B4

MAX14777

CONFIG BIAS

GENERATION

SEL35

VCC

VN10nF

50V/100V

10nF

50V/100V

EN4EN3

EN2

EN1

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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Application Example

The MAX14777 can be used for designing an indus-

trial single-supply analog input module that supports both

±15V voltages and 4mA–20mA current measurements. In

this scheme, the MAX14777 switches in a 250Ω resistor,

typically used for translating the current-loop current to

a voltage for analog measurement, as shown in Figure

9. By using three of the four MAX14777 switches, which

provide accurate current and voltage measurement, the

device handles voltages up to 36V, as maximally found

in current-loop power supplies. In voltage measurement

mode, with switch positions as shown in Figure 9, analog

input voltages in the ±15V range are switched to the ampli-

fier input. Invert all switch positions for current loop mea-

surement operation.

When the analog input module is not powered, the

MAX14777 tolerates and protects the resistor and PGA

against voltages mistakenly connected to the AIN terminal.

Figure 9. Analog Input Module for Voltage and Current Loop Measurement

24V

250Ω

L+

AIN

COM

PGA

1/4 MAX14777

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

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+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed Pad

PART TEMP RANGE PIN-PACKAGE

MAX14777GTP+ -40°C to +105°C 20 TQFN-EP*

PACKAGE

TYPE

PACKAGE

CODE

OUTLINE

NO.

LAND

PATTERN NO.

20 TQFN-EP T2044+4 21-0139 90-0409

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

www.maximintegrated.com Maxim Integrated

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Package Information

For the latest package outline information and land patterns

(footprints), go to www.maximintegrated.com/packages. Note

that a “+”, “#”, or “-” in the package code indicates RoHS status

only. Package drawings may show a different suffix character, but

the drawing pertains to the package regardless of RoHS status.

Chip Information

PROCESS: BiCMOS

Ordering Information

REVISION

NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

0 6/13 Initial release —

1 10/13 Removed reference to prereleased op amp 14

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses

are implied. Maxim Integrated reserves the right to change the circuitry and specications without notice at any time. The parametric values (min and max limits)

shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.

MAX14777 Quad Beyond-the-Rails -15V to +35V

Analog Switch

│

Revision History

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.