MAX9202ESD+T - Maxim Integrated Products, Inc.

General Description

The MAX9201/MAX9202/MAX9203 high-speed, low-

power, quad/dual/single comparators feature TTL logic

outputs with active internal pullups. Fast propagation

delay (7ns typ at 5mV overdrive) makes these devices

ideal for fast A/D converters and sampling circuits, line

receivers, V/F converters, and many other data-discrim-

ination, signal restoration applications.

All comparators can be powered from separate analog

and digital power supplies or from a single combined

supply voltage. The analog input common-mode range

includes the negative rail, allowing ground sensing

when powered from a single supply. The MAX9201/

MAX9202/MAX9203 consume only 9mW per compara-

tor when powered from a +5V supply.

The MAX9202/MAX9203 feature output latches with TTL

compatible inputs. The comparator output states are

held when the latch inputs are driven low. The

MAX9201 provides all the same features as the

MAX9202/MAX9203 with the exception of the latches.

The MAX9201/MAX9202/MAX9203 are lower power and

lower cost upgrades to the MAX901/MAX902/MAX903

offering a 50% power savings and smaller packaging.

________________________Applications

____________________________Features

♦Fast 7ns Propagation Delay

♦Low 9mW/Comparator Power Consumption

♦Separate Analog and Digital Supplies

♦Flexible Analog Supply: +5V to +10V or ±5V

♦Input Voltage Range Includes

Negative Supply Rail

♦TTL-Compatible Outputs

♦TTL-Compatible Latch Inputs

(MAX9202/MAX9203)

♦Available in Space-Saving Packages

8-Pin SOT23 (MAX9203)

14-Pin TSSOP (MAX9202)

16-Pin TSSOP (MAX9201)

MAX9201/MAX9202/MAX9203

Low-Cost, 7ns, Low-Power

Voltage Comparators

________________________________________________________________ Maxim Integrated Products 1

TOP VIEW

VCC

N.C.

OUTB

LATCHBLATCHA

GND

INA+

INA-

MAX9202

VDD

INB+

INB-VEE

N.C.

OUTA

SO/TSSOP

INA- IND-

IND+

VCC

OUTD

OUTC

VDD

INC+

INC-

MAX9201

SO/TSSOP

INA+

GND

VEE

OUTA

OUTB

INB+

INB-

IN-

VEE

LATCH

VCC

IN+OUT

GND

VDD

SOT23

MAX9203

GND

LATCHVEE

VDD

OUTIN+

IN-

VCC

MAX9203

Pin Configurations

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX9201EUE -40°C to +85°C 16 TSSOP

MAX9201ESE -40°C to +85°C 16 Narrow SO

MAX9202EUD -40°C to +85°C 14 TSSOP

MAX9202ESD -40°C to +85°C 14 Narrow SO

MAX9203EKA-T

-40°C to +85°C 8 SOT23-8

MAX9203ESA -40°C to +85°C 8 Narrow SO

Ordering Information

High-Speed A/D

Converters

High-Speed V/F

Converters

Line Receivers

High-Speed Signal

Squaring/Restoration

Threshold Detectors

Input Trigger Circuitry

High-Speed Data

Sampling

PWM Circuits

19-1936; Rev 1; 1/05

MAX9201/MAX9202/MAX9203

Low Cost, 7ns, Low-Power

Voltage Comparators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at TA= +25°C,

unless otherwise noted.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and function-

al 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.

Analog Supply Voltage (VCC - VEE) .....................................+12V

Digital Supply Voltage (VDD) .................................................+7V

Differential Input Voltage..................(VEE - 0.3V) to (VCC + 0.3V)

Common Mode Input Voltage ..........(VEE - 0.3V) to (VCC + 0.3V)

Latch Input Voltage

(MAX9202/MAX9203 only) .....................-0.3V to (VDD + 0.3V)

Output Short-Circuit Duration

To GND ......................................................................Continuous

To VDD ..................................................................................1min

Continuous Power Dissipation (TA= +70°C)

8-Pin SOT23-8 (derate 9.1mW/°C above +70°C) ...727mW/°C

8-Pin SO (derate 5.9mW/°C above +70°C).............471mW/°C

14-Pin TSSOP (derate 9.1mW/°C above +70°C) ....727mW/°C

14-Pin SO (derate 8.3mW/°C above +70°C)...........667mW/°C

16-Pin TSSOP (derate 9.4mW/°C above +70°C) ....755mW/°C

16-Pin SO (derate 8.7mW/°C above +70°C)...........696mW/°C

Operating Temperature Range ...........................-45°C to +85°C

Junction Temperature......................................................+150°C

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

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Analog Supply Voltage Range

VCC - VEE

Referenced to VEE

4.75 10.5

Digital Supply Voltage Range VDD Referenced to GND

4.75 5.25

TA = +25°C14

Input Offset Voltage VOS VCM = 0,

VOUT= 1.4V TA = -40°C to +85°C 7.5 mV

TA = +25°C

1.25

Input Bias Current IBIIN+ or IIN- TA = -40°C to +85°C 7.0 µA

TA = +25°C50

250

Input Offset Current IOS VCM = 0,

VOUT = 1.4V TA = -40°C to +85°C

450

Common-Mode Input Voltage

Range VCM Note 2

VEE - 0.1

C C -

2.25 V

TA = +25°C50

150

Common-Mode Rejection

Ratio

CMRR - 5.1V < V

C M

< +2.75V

OU T = 1.4V TA = -40°C to +85°C

250

µV/V

TA = +25°C50

150

Power-Supply Rejection Ratio

PSRR Note 3 TA = -40°C to +85°C

250

µV/V

Output High Voltage VOH (VIN+ - VIN-) > 250mV, ISOURCE = 1mA 3.0 3.5 V

Output Low Voltage VOL (VIN+ - VIN-) < -250mV, ISINK = 8mA

0.25

0.4 V

Latch Input Threshold Voltage

High VLH Note 4 1.4 2 V

Latch Input Threshold Voltage

Low VLL Note 4 0.8 1.4 V

Latch Input Current High ILH VLH = 3.0V, Note 4 0.5 3 µA

Latch Input Current Low ILL VLL = 0.3V, Note 4 0.5 3 µA

Input Capacitance CIN 4pF

Differential Input Impedance RIND 5MΩ

Common-Mode Input

Impedance

RINCM

5.5 MΩ

MAX9201 4.7 7

MAX9202 2.5 4.0

Positive Analog Supply

Current ICC Note 5

MAX9203 1.3 2

MAX9201/MAX9202/MAX9203

Low Cost, 7ns, Low-Power

Voltage Comparators

_______________________________________________________________________________________ 3

Note 1: All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design.

Note 2: Inferred by CMRR test.

Note 3: Tested for +4.75V < VCC < +5.25V, and -5.25V < VEE < -4.75V with VDD = +5V, although permissible analog power-supply

range is 4.75V < VCC < +10.5V for single supply operation with VEE grounded.

Note 4: Specification does not apply to MAX9201.

Note 5: ICC tested for 4.75V < VCC < +10.5V with VEE grounded. IEE tested for -5.25V < VEE < -4.75V with VCC = +5V. IDD tested for

+4.75V < VDD < +5.25V with all comparator outputs low, worst-case condition.

Note 6: Guaranteed by design. Times are for 100mV step inputs (see propagation delay characteristics in Figures 2 and 3)

Note 7: Maximum difference in propagation delay between two comparators in the MAX9201/MAX9202.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX9201 3.4 5.0

MAX9202 1.8 3.0

Negative Analog Supply

Current I

Note 5

MAX9203 1.0 1.6

MAX9201 2 3.0

MAX9202 1 1.5Digital Supply Current I

Note 5

MAX9203 0.5 0.8

MAX9201 33 44

MAX9202 17 24

Power Dissipation P

= V

= +5V,

= 0V MAX9203 9 13

TIMING CHARACTERISTICS

(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at

TA= +25°C, unless otherwise noted.) (Notes 1, 6)

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at TA= +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

TA = +25°C79

Input-to-Output High

Response Time tPD+

VOD = 5mV,

CL = 15pF,

IOUT = 2mA TA = -40°C to +85°C12

TA = +25°C79

Input-to-Output Low

Response Time tPD-

VOD = 5mV,

CL = 15pF,

IOUT = 2mA TA = -40°C to +85°C12

Rise Time tRCL = 15pF,

IOUT = 2mA TA = +25°C 2.0 ns

Fall Time tFCL = 15pF,

IOUT = 2mA TA = +25°C 1.0 ns

TA = +25°C 0.5 1.5

Difference in Response Time

Between Outputs ∆tPD Note 7 TA = -40°C to +85°C 2.5 ns

Latch Disable to Output High

Delay

tPD+(D)

Note 4 10 ns

Latch Disable to Output Low

Delay

tPD-(D)

Note 4 10 ns

Minimum Setup Time tSNote 4 2 ns

Minimum Hold Time tNNote 4 1 ns

Minimum Latch Disable

Pulse Width

tPW(D)

Note 4 8 ns

MAX9201/MAX9202/MAX9203

Low Cost, 7ns, Low-Power

Voltage Comparators

4 _______________________________________________________________________________________

-1.5

-0.5

-1.0

0.5

1.0

1.5

-40 10-15 35 60 85

INPUT OFFSET VOLTAGE vs. TEMPERATURE

MAX9201 toc01

TEMPERATURE (°C)

INPUT OFFSET VOLTAGE (mV)

2.8

3.2

3.0

3.6

3.4

3.8

4.0

046281012

OUTPUT HIGH VOLTAGE (VOH)

vs. LOAD CURRENT

MAX9201 toc03

LOAD CURRENT (mA)

OUTPUT HIGH VOLTAGE (V)

TA = -40°C

TA = +85°C

TA = +25°C

100

150

200

250

300

350

400

042681012

OUTPUT LOW VOLTAGE (VOL)

vs. LOAD CURRENT

MAX9201 toc04

LOAD CURRENT (mA)

OUTPUT LOW VOLTAGE (mV)

TA = +85°C

TA = +25°C

TA = -40°C

5.0

6.0

5.5

7.0

6.5

8.0

7.5

8.5

9.5

9.0

10.0

0 1015205 253035 4540 50

RESPONSE TIME vs. INPUT OVERDRIVE

MAX9201 toc06

INPUT OVERDRIVE (mV)

RESPONSE TIME (ns)

tPD-

tPD+

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

5678910

ICC SUPPLY CURRENT (PER COMPARATOR)

vs. VCC SUPPLY VOLTAGE

MAX9201 toc05

VCC SUPPLY VOLTAGE (V)

ICC SUPPLY CURRENT (mA)

TA = +85°C

TA = +25°C

TA = -40°C

VEE = GND

Typical Operating Characteristics

(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, VOUT = 1.4V, TA= +25°C, unless otherwise noted.)

0.4

0.8

0.6

1.2

1.0

1.6

1.4

1.8

-40 10-15 35 60 85

INPUT BIAS CURRENT vs. TEMPERATURE

MAX9201 toc02

TEMPERATURE (°C)

INPUT BIAS CURRENT (µA)

VCM = 0

MAX9201/MAX9202/MAX9203

Low Cost, 7ns, Low-Power

Voltage Comparators

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued)

(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, VOUT = 1.4V, TA= +25°C, unless otherwise noted.)

Pin Description

6.0

7.0

6.5

8.5

8.0

7.5

9.5

9.0

10.0

0304010 20 50 60 70 80 90

RESPONSE TIME vs. LOAD CAPACITANCE

(5mV OVERDRIVE, RLOAD = 2.4kΩ)

MAX9201 toc08

LOAD CAPACITANCE (pF)

RESPONSE TIME (ns)

tPD-

tPD+

6.5

7.0

6.8

7.5

7.3

7.8

8.0

-40-30-20-100 1020304050607080 90

RESPONSE TIME vs. TEMPERATURE

(5mV OVERDRIVE)

MAX9201 toc07

TEMPERATURE (°C)

RESPONSE TIME (ns)

tPD-

tPD+

NAME

FUNCTION

1, 8, 9,

16 IN_- Negative Input (Channels A, B, C,

2, 7, 10,

15 IN_+ Positive Input (Channels A, B, C,

3 GND Ground

4, 5, 12,

13 OUT_ Output (Channels A, B, C, D)

EE Negative Analog Supply and

Substrate

11 VDD Positive Digital Supply

14 VCC Positive Analog Supply

PIN NAME FUNCTION

1, 8 IN_- Negative Input (Channels A, B)

2, 9 IN_+ Positive Input (Channels A, B)

3 GND Ground

4, 11 LATCH_ Latch Input (Channels A, B)

5, 12 OUT_ Output (Channels A, B)

6, 13 N.C. No Connection

EE Negative Analog Supply and

Substrate

10 VDD Positive Digital Supply

14 VCC Positive Analog Supply

MAX9201 MAX9202

Applications Information

Circuit Layout

Because of the large gain-bandwidth transfer function

of the MAX9201/MAX9202/MAX9203 special precau-

tions must be taken to realize their full high-speed

capability. A printed circuit board with a good, low-

inductance ground plane is mandatory. All decoupling

capacitors (the small 100nF ceramic type is a good

choice) should be mounted as close as possible to the

power-supply pins. Separate decoupling capacitors for

analog VCC and for digital VDD are also recommended.

Close attention should be paid to the bandwidth of the

decoupling and terminating components. Short lead

lengths on the inputs and outputs are essential to avoid

unwanted parasitic feedback around the comparators.

Solder the device directly to the printed circuit board

instead of using a socket.

Input Slew-Rate Requirements

As with all high-speed comparators, the high gain-band-

width product of the MAX9201/MAX9202/ MAX9203 can

create oscillation problems when the input traverses the

linear region. For clean output switching without oscilla-

tion or steps in the output waveform, the input must meet

minimum slew-rate requirements (0.5V/s typ). Oscillation

is largely a function of board layout and of coupled

source impedance and stray input capacitance. Both

poor layout and large source impedance will cause the

part to oscillate and increase the minimum slew-rate

requirement. In some applications, it may be helpful to

apply some positive feedback between the output and

positive input. This pushes the output through the transi-

tion region clearly, but applies a hysteresis in threshold

seen at the input terminals.

TTL Output and Latch Inputs

The comparator TTL output stages are optimized for

driving low-power Schottky TTL with a fan-out of four.

When the latch is connected to a logic high level, the

comparator is transparent and immediately responds to

changes at the input terminals. When the latch is con-

nected to a TTL low level, the comparator output latch-

es (in the same state) the instant that the latch

command is applied, and will not respond to subse-

quent changes at the input. No latch is provided on

the MAX9201.

6 _______________________________________________________________________________________

MAX9201/9202/9203

Low Cost, 7ns, Low-Power

Voltage Comparators

SO SOT

NAME

FUNCTION

18V

CC Positive Analog Supply

2 7 IN+ Positive Input

3 6 IN- Negative Input

45V

EE Negative Analog Supply and

Substrate

LATCH

Latch Input

6 3 GND Ground

7 2 OUT Output

81V

DD Positive Digital Supply

Pin Description (continued)

VEE

GND

VDD

VCC

OUT

+10V

+5V

VEE

GND

VDD

VCC

OUT

+5V

VEE

GND

VDD

VCC

OUT

+5V

-5V

Typical Power-Supply Alternatives

Figure 1a. Separate Analog Supply,

Common Ground

Figure 1b. Single +5V Supply, Common

Ground

Figure 1c. Split ±5V Supply, Separate

Ground

MAX9203

_______________________________________________________________________________________ 7

MAX9201/9202/9203

Low Cost, 7ns, Low-Power

Voltage Comparators

Power Supplies

The MAX9201/MAX9202/MAX9203 can be powered

from separate analog and digital supplies or from a sin-

gle +5V supply. The analog supply can range from +5V

to +10V with VEE grounded for single-supply operation

(Figures 1a and 1b) or from a split ±5V supply (Figure

1c). The VDD digital supply always requires +5V.

In high-speed, mixed-signal applications where a com-

mon ground is shared, a noisy digital environment can

adversely affect the analog input signal. When set up with

separate supplies, the MAX9201/MAX9202/MAX9203

isolate analog and digital signals by providing a separate

analog ground (VEE) and digital ground (GND).

Definition of Terms

VOS Input Offset Voltage: Voltage applied be-

tween the two input terminals to obtain TTL

logic threshold (+1.4V) at the output.

VIN Input Voltage Pulse Amplitude: Usually set

to 100mV for comparator specifications.

VOD Input Voltage Overdrive: Usually set to 5mV

and in opposite polarity to VIN for comparator

specifications.

tpd+ Input to Output High Delay: The propagation

delay measured from the time the input signal

crosses the input offset voltage to the TTL

logic threshold (+1.4V) of an output low to high

transition.

tpd- Input to Output Low Delay: The propagation

delay measured from the time the input signal

crosses the input offset voltage to the TTL

logic threshold (+1.4V) of an output high to low

transition.

tpd+ (D) Latch Disable to Output High Delay: The

propagation delay measured from the latch

signal crossing the TTL logic threshold

(+1.4V) in a low to high transition to the point

of the output crossing TTL threshold (+1.4V)

in a low to high transition.

tpd- (D) Latch Disable to Output Low Delay: The

propagation delay measured from the latch

signal crossing the TTL threshold (+1.4V) in a

low to high transition to the point of the output

crossing TTL threshold (+1.4V) in a high to

low transition.

tsMinimum Setup Time: The minimum time,

before the negative transition of the latch sig-

nal, that an input signal change must be pre-

sent in order to be acquired and held at the

outputs.

thMinimum Hold Time: The minimum time,

after the negative transition of the latch sig-

nal, that an input signal must remain

unchanged in order to be acquired and held

at the output.

tpw (D) Minimum Latch Disable Pulse Width: The

minimum time that the latch signal must

remain high in order to acquire and hold an

input signal change.

Figure 2. MAX9201/MAX9202/MAX9203 Diagram Figure 3. tPD+ Response Time to 5mV Overdrive

LATCH

ENABLE

INPUT

tpd tpd+ (D)

tpw (D)

tsth

VIN

VOD VOS

LATCH

COMPARE

LATCH LATCH

COMPARE

COMPARATOR

OUTPUT

1.4V

5ns/div

OUTPUT

INPUT

VOD + 5mV

50mV/div

1V/div

MAX9201/9202/9203

Low Cost, 7ns, Low-Power

Voltage Comparators

Figure 4. tPD- Response Time to 5mV Overdrive Figure 5. Response-Time Setup

5ns/div

OUTPUT

INPUT

VOD + 5mV

50mV/div

1V/div

PRECISION

STEP

GENERATOR

INPUT TO 10X

SCOPE PROBE

(10MΩ 14pF)

VCC

OFFSET

ADJUST 100nF 100nF 10kΩ

VEE = -5V

100nF

OUTPUT TO 10X

SCOPE PROBE

(10MΩ 14pF)

1kΩ

10kΩ

VCC = +5V VDD = +5V

2.43kΩ

D.U.T.

100nF

Figure 6. Response to 50MHz Sine Wave Figure 7. Response to 100MHz Sine Wave

5ns/div

OUTPUT

INPUT

2V/div

10mV/div

5ns/div

OUTPUT

INPUT

2V/div

10mV/div

Chip Information

MAX9201 TRANSISTOR COUNT: 348

MAX9202 TRANSISTOR COUNT: 176

MAX9203 TRANSISTOR COUNT: 116

PROCESS: Bipolar

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

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600