MIC7300YMMTR - Micrel

June 2005 1 MIC7300

MIC7300 Micrel

MIC7300

High-Output Drive Rail-to-Rail Op Amp

General Description

The MIC7300 is a high-performance CMOS operational

amplifier featuring rail-to-rail input and output with strong

output drive capability. It is able to source and sink in excess

of 80mA into large capacitive loads.

The input common-mode range extends beyond the rails by

300mV, and the output voltage typically swings to within

150µV of both rails when driving a 100kΩ load.

The amplifier operates from 2.2V to 10V and is fully specified

at 2.2V, 3V, 5V, and 10V. Gain bandwidth and slew rate are

500kHz and 0.5V/µs, respectively.

The MIC7300 is available in Micrel’s IttyBitty™ SOT-23-5

package for space-conscious circuits and in high-power

MM8™ 8-lead MSOP for improved heat dissipation in higher

power applications.

Pin Description

Pin Number Pin Number Pin Name Pin Function

SOT-23-5 MSOP-8

1 4 OUT Amplifier Output

2 5–8 V– Negative Supply: Negative supply for split supply application or ground for

single supply application.

3 3 IN+ Noninverting Input

4 2 IN– Inverting Input

5 1 V+ Positive Supply

Pin Configurations

OUTV–

IN–

IN+

V+

A17

Part

Identification

SOT-23-5 (M5)

V–

V+

IN–

IN+

OUT

MSOP-8 (MM)

Features

•Small footprint SOT-23-5 and power MSOP-8 packages

•>80mA peak output sink and source with 5V supply

•Drives large capacitive loads (6000pF with 10V supply)

•Guaranteed 2.2V, 3V, 5V, and 10V performance

•500kHz gain-bandwidth product

•0.01% total harmonic distortion at 1kHz (10V, 2kΩ)

•1mA typical power supply current at 5V

Applications

•Battery-powered instrumentation

•PCMCIA, USB peripherals

•Portable computers and PDAs

Functional Configuration

OUTV–

IN–

IN+ 13

V+

SOT-23-5 (M5)

IttyBitty and MM8 are trademarks of Micrel, Inc.

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

Ordering Information

Part Number

Standard Pb-free Temp. Range Package

MIC7300BM5 MIC7300YM5 –40°C to +85°C SOT-23-5

MIC7300BMM MIC7300YMM –40°C to +85°C MSOP-8

MIC7300 Micrel

MIC7300 2 June 2005

DC Electrical Characteristics (2.2V)

VV+ = +2.2V, VV– = 0V, VCM = VOUT = VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

; Note 7

; unless noted

Symbol Parameter Condition Min Typ Max Units

VOS Input Offset Voltage 1.0 9 mV

TCVOS Input Offset Voltage Average Drift 1.0 µV/°C

IBInput Bias Current 0.5 pA

IOS Input Offset Current 0.25 pA

RIN Input Resistance >1 TΩ

CMRR Common-Mode Rejection Ratio 0V ≤ VCM ≤ 2.2V, Note 9 45 65 dB

VCM Input Common-Mode Voltage input low, CMRR ≥ 45dB –0.3 0.0 V

input high, CMRR ≥ 45dB 2.2 2.5 V

±PSRR Power Supply Rejection Ratio VV+ = VV– = 1.1V to 2.5V, VCM = 0 55 75 dB

CIN Common-Mode Input Capacitance 3 pF

VOOutput Swing output high, RL = 100k, 0.15 1 mV

specified as VV+ – VOUT 1mV

output low, RL = 100k 0.15 1 mV

1mV

output high, RL = 2k 10 33 mV

specified as VV+ – VOUT 50 mV

output low, RL = 2k 10 33 mV

50 mV

output high, RL = 600Ω33 110 mV

specified as VV+ – VOUT 165 mV

output low, RL = 600Ω33 110 mV

165 mV

ISC Output Short Circuit Current sinking or sourcing, Note 8 20 40 mA

ISSupply Current VOUT = V+/2 0.7 2.0 mA

AC Electrical Characteristics (2.2V)

VV+ = 2.2V, VV– = 0V, VCM = VOUT = VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

; Note 7

; unless noted

Symbol Parameter Condition Min Typ Max Units

SR Slew Rate 0.5 V/µs

GBW Gain-Bandwidth Product 0.55 MHz

φmPhase Margin CL = 0pF 80 °

CL = 2500pF 40 °

GmGain Margin 10 dB

Absolute Maximum Ratings (Note 1)

Supply Voltage (VV+ – VV–)...........................................12V

Differential Input Voltage (VIN+ – VIN–) .......................±12V

I/O Pin Voltage (VIN, VOUT), Note 3

.............................................VV+ + 0.3V to VV– – 0.3V

Junction Temperature (TJ) ...................................... +150°C

Storage Temperature ...............................–65°C to +150°C

Lead Temperature (soldering, 10 sec.) ..................... 260°C

ESD, Note 6

Operating Ratings (Note 2)

Supply Voltage (VV+ – VV–).............................. 2.2V to 10V

Junction Temperature (TJ) .........................–40°C to +85°C

Package Thermal Resistance, Note 5

SOT-23-5 (θJA)..................................................260°C/W

MSOP-8 (θJA)......................................................85°C/W

Max. Power Dissipation............................................ Note 4

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DC Electrical Characteristics (3.0V)

VV+ = +3.0V, VV– = 0V, VCM = VOUT = VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

; Note 7

; unless noted

Symbol Parameter Condition Min Typ Max Units

VOS Input Offset Voltage 1.0 9 mV

TCVOS Input Offset Voltage Average Drift 1.0 µV/°C

IBInput Bias Current 0.5 pA

IOS Input Offset Current 0.25 pA

RIN Input Resistance >1 TΩ

CMRR Common-Mode Rejection Ratio 0V ≤ VCM ≤ 3.0V, Note 9 50 70 dB

VCM Input Common-Mode Voltage input low, CMRR ≥ 50dB –0.3 0 V

input high, CMRR ≥ 50dB 3.0 3.3 V

±PSRR Power Supply Rejection Ratio VV+ = VV– = 1.5V to 5.0V, VCM = 0 55 75 dB

CIN Common-Mode Input Capacitance 3 pF

VOUT Output Swing output high, RL = 100k 0.2 1 mV

specified as VV+ – VOUT 1mV

output low, RL = 100k 0.2 1 mV

1mV

output high, RL = 2k 10 33 mV

specified as VV+ – VOUT 50 mV

output low, RL = 2k 10 33 mV

50 mV

output high, RL = 600Ω33 110 mV

specified as VV+ – VOUT 165 mV

output low, RL = 600Ω33 110 mV

165 mV

ISC Output Short Circuit Current sinking or sourcing, Note 8 60 95 mA

ISSupply Current 0.8 2.2 mA

AC Electrical Characteristics (3V)

VV+ = 3V, VV– = 0V, VCM = 1.5V, VOUT = VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

; Note 7

; unless noted

Symbol Parameter Condition Min Typ Max Units

SR Slew Rate 0.5 V/µs

GBW Gain-Bandwidth Product 0.45 MHz

φmPhase Margin CL = 0pF 85 °

CL = 3500pF 40 °

GmGain Margin 10 dB

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DC Electrical Characteristics (5V)

V+

= +5.0V, V

V–

= 0V, V

= 1.5V, V

OUT

= V

V+

/2; R

= 1MΩ; T

= 25°C, bold values indicate –40°C ≤ T

≤ +85°C; Note 7; unless noted

Symbol Parameter Condition Min Typ Max Units

VOS Input Offset Voltage 1.0 9 mV

TCVOS Input Offset Voltage Average Drift 1.0 µV/°C

IBInput Bias Current 0.5 pA

IOS Input Offset Current 0.25 pA

RIN Input Resistance >1 TΩ

CMRR Common-Mode Rejection Ratio 0V ≤ VCM ≤ 5V, Note 9 55 80 dB

VCM Input Common-Mode Voltage input low, CMRR ≥ 55dB –0.3 –0.0 V

input high, CMRR ≥ 55dB 5.0 5.3 V

±PSRR Power Supply Rejection Ratio VV+ = VV– = 2.5V to 5.0V, VCM = 0 55 75 dB

CIN Common-Mode Input Capacitance 3 pF

VOUT Output Swing output high, RL = 100k 0.3 1.0 mV

specified as VV+ – VOUT 1.5 mV

output low, RL = 100k 0.3 1.0 mV

1.5 mV

output high, RL = 2k 15 50 mV

specified as VV+ – VOUT 75 mV

output low, RL = 2k 15 50 mV

75 mV

output high, RL = 600Ω50 165 mV

specified as VV+ – VOUT 250 mV

output low, RL = 600Ω50 165 mV

250 mV

ISC Output Short Circuit Current sinking or sourcing, Note 8 85 105 mA

ISSupply Current VOUT = V+/2 1.0 2.8 mA

AC Electrical Characteristics (5V)

VV+ = 5V, VV– = 0V, VCM = 1.5V, VOUT = VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

; Note 7

; unless noted

Symbol Parameter Condition Min Typ Max Units

THD Total Harmonic Distortion f = 1kHz, AV = –2, 0.05 %

RL = 2kΩ, VOUT = 4.0 VPP

SR Slew Rate 0.5 V/µs

GBW Gain-Bandwidth Product 0.4 MHz

φmPhase Margin CL = 0pF 85 °

CL = 4500pF 40 °

GmGain Margin 10 dB

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DC Electrical Characteristics (10V)

V+

= +10V, V

V–

= 0V, V

= 1.5V, V

OUT

= V

V+

/2; R

= 1MΩ; T

= 25°C, bold values indicate –40°C ≤ T

≤ +85°C; Note 7; unless noted

Symbol Parameter Condition Min Typ Max Units

VOS Input Offset Voltage 1.0 9 mV

TCVOS Input Offset Voltage Average Drift 1.0 µV/°C

IBInput Bias Current 0.5 pA

IOS Input Offset Current 0.25 pA

RIN Input Resistance >1 TΩ

CMRR Common-Mode Rejection Ratio 0V ≤ VCM ≤ 10V, Note 9 60 85 dB

VCM Input Common-Mode Voltage input low, V+ = 10V, CMRR ≥ 60dB –0.3 –0.0 V

input high, V+ = 10V, CMRR ≥ 60dB 10.0 10.3 V

±PSRR Power Supply Rejection Ratio VV+ = VV– = 2.5V to 5.0V, VCM = 0 55 75 dB

AVLarge Signal Voltage Gain sourcing or sinking, 80 340 V/mV

RL = 2k, Note 10

sourcing or sinking, 15 300 V/mV

RL = 600Ω, Note 10

CIN Common-Mode Input Capacitance 3 pF

VOUT Output Swing output high, RL = 100k 0.5 1.5 mV

specified as VV+ – VOUT 2.5 mV

output low, RL = 100k 0.5 1.5 mV

2.5 mV

output high, RL = 2k 24 80 mV

specified as VV+ – VOUT 120 mV

output low, RL = 2k 24 80 mV

120 mV

output high, RL = 600Ω80 270 mV

specified as VV+ – VOUT 400 mV

output low, RL = 600Ω80 270 mV

400 mV

ISC Output Short Circuit Current sinking or sourcing, Notes 8 90 115 mA

ISSupply Current VOUT = V+/2 1.5 4.0 mA

AC Electrical Characteristics (10V)

VV+ = 10V, VV– = 0V, VCM = 1.5V, VOUT = VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

; Note 7

; unless noted

Symbol Parameter Condition Min Typ Max Units

THD Total Harmonic Distortion f = 1kHz, AV = –2, 0.01 %

RL = 2k, VOUT = 8.5 VPP

SR Slew Rate V+ = 10V, Note 11 0.5 V/µs

V/µs

GBW Gain-Bandwidth Product 0.37 MHz

φmPhase Margin CL = 0pF 85 °

CL = 6000pF 40 °

GmGain Margin 10 dB

enInput-Referred Voltage Noise f = 1kHz, VCM = 1V 37

nV/ Hz

inInput-Referred Current Noise f = 1kHz 1.5

fA/ Hz

MIC7300 Micrel

MIC7300 6 June 2005

Note 1. Exceeding the absolute maximum rating may damage the device.

Note 2. The device is not guaranteed to function outside its operating rating.

Note 3. I/O Pin Voltage is any external voltage to which an input or output is referenced.

Note 4. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(max); the junction-to-ambient thermal

resistance, θJA; and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using:

PD = (TJ(max) – TA) ÷ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature.

Note 5. Thermal resistance, θJA, applies to a part soldered on a printed-circuit board.

Note 6. Devices are ESD protected; however, handling precautions are recommended.

Note 7. All limits guaranteed by testing or statistical analysis.

Note 8. Continuous short circuit may exceed absolute maximum TJ under some conditions.

Note 9. CMRR is determined as follows: The maximum ∆VOS over the VCM range is divided by the magnitude of the VCM range. The measurement

points are: VV–, (VV+ – VV–)/2, and VV+.

Note 10. RL connected to 5V. Sourcing: 5V ≤ VOUT ≤ 10V. Sinking: 2.5V ≤ VOUT ≤ 5V.

Note 11. Device connected as a voltage follower with a 10V step input. The value is the positive or negative slew rate, whichever is slower.

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100

1000

10000

-40 0 40 80 120 160

INPUT CURRENT (pA)

JUNCTION TEMPERATURE (°C)

Input Current vs.

Junction Temperature

= 25°C

Typical Characteristics

0.01

0.1

100

1000

0.001 0.01 0.1 1 10

CURRENT SINK / SOURCE (mA)

OUTPUT VOLTAGE (V)

Sink / Source Currents

vs. Output Voltage

= 25°C

1000

2000

3000

4000

5000

6000

7000

246810

LOAD CAPACITANCE (pF)

SUPPLY VOLTAGE (V)

Capacitive Load Capability

vs. Supply Voltage

TA = 25°C

MIC7300 Micrel

MIC7300 8 June 2005

Application Information

Input Common-Mode Voltage

The MIC7300 tolerates input overdrive by at least 300mV

beyond either rail without producing phase inversion.

If the absolute maximum input voltage is exceeded, the input

current should be limited to ±5mA maximum to prevent

reducing reliability. A 10kΩ series input resistor, used as a

current limiter, will protect the input structure from voltages as

large as 50V above the supply or below ground. See Figure

OUT

10kΩ

Figure 1. Input Current-Limit Protection

Output Voltage Swing

Sink and source output resistances of the MIC7300 are

equal. Maximum output voltage swing is determined by the

load and the approximate output resistance. The output

resistance is:

OUT DROP

LOAD

VDROP is the voltage dropped within the amplifier output

stage. VDROP and ILOAD can be determined from the VO

(output swing) portion of the appropriate Electrical Character-

istics table. ILOAD is equal to the typical output high voltage

minus V+/2 and divided by RLOAD. For example, using the

Electrical Characteristics DC (5V) table, the typical output

high voltage using a 2kΩ load (connected to V+/2) is 4.985V,

which produces an ILOAD of:

4.985V 2.5V

2k 1.243mA

−

Ω









=.

Voltage drop in the amplifier output stage is:

VDROP = 5.0V – 4.985V

VDROP = 0.015V

Because of output stage symmetry, the corresponding typical

output low voltage (0.015V) also equals VDROP. Then:

R0.015V

0.001243A 1

OUT ==2Ω

Power Dissipation

The MIC7300 output drive capability requires considering

power dissipation. If the load impedance is low, it is possible

to damage the device by exceeding the 125°C junction

temperature rating.

On-chip power consists of two components: supply power

and output stage power. Supply power (PS) is the product of

the supply voltage (VS = VV+ – VV–) and supply current (IS).

Output stage power (PO) is the product of the output stage

voltage drop (VDROP) and the output (load) current (IOUT).

Total on-chip power dissipation is:

PD = PS + PO

PD = VSIS + VDROP IOUT

where:

PD = total on-chip power

PS = supply power dissipation

PO = output power dissipation

VS = VV+ – VV–

IS = power supply current

VDROP = VV+ – VOUT

(sourcing current)

VDROP = VOUT – VV–

(sinking current)

The above addresses only steady state (dc) conditions. For

non-dc conditions the user must estimate power dissipation

based on rms value of the signal.

The task is one of determining the allowable on-chip power

dissipation for operation at a given ambient temperature and

power supply voltage. From this determination, one may

calculate the maximum allowable power dissipation and,

after subtracting PS, determine the maximum allowable load

current, which in turn can be used to determine the miniumum

load impedance that may safely be driven. The calculation is

summarized below.

PTT

D(max) J(max) A

=−

θJA(SOT-23-5) = 260°C/W

θJA(MSOP-8) = 85°C/W

Driving Capacitive Loads

Driving a capacitive load introduces phase-lag into the output

signal, and this in turn reduces op-amp system phase margin.

The application that is least forgiving of reduced phase

margin is a unity gain amplifier. The MIC7300 can typically

drive a 2500pF capacitive load connected directly to the

output when configured as a unity-gain amplifier and pow-

ered with a 2.2V supply. At 10V operation the circuit typically

drives 6000pF. Phase margin is typically 40°.

Using Large-Value Feedback Resistors

A large-value feedback resistor (> 500kΩ) can reduce the

phase margin of a system. This occurs when the feedback

resistor acts in conjunction with input capacitance to create

phase lag in the feedback signal. Input capacitance is usually

a combination of input circuit components and other parasitic

capacitance, such as amplifier input capacitance and stray

printed circuit board capacitance.

Figure 2 illustrates a method of compensating phase lag

caused by using a large-value feedback resistor. Feedback

capacitor CFB introduces sufficient phase lead to overcome

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the phase lag caused by feedback resistor RFB and input

capacitance CIN. The value of CFB is determined by first

estimating CIN and then applying the following formula:

R C R C

IN IN FB FB

×≤ ×

VIN

CFB

RFB

VOUT

CIN

RIN

Figure 2. Cancelling Feedback Phase Lag

Since a significant percentage of CIN may be caused by board

layout, it is important to note that the correct value of CFB may

change when changing from a breadboard to the final circuit

layout.

Typical Circuits

Some single-supply, rail-to-rail applications for which the

MIC7300 is well suited are shown in the circuit diagrams of

Figures 3 through 7.

910k

100k

VOUT

0V to V+

V+

2.2V to 10V

VIN 5

MIC7300

0V to V+

Figure 3a. Noninverting Amplifier

100

0100

VOUT (V)

VIN (V)

V+

=+ ≈10

Figure 3b. Noninverting Amplifier Behavior

OUT

0V to V+

V+

2.2V to 10V

0V to V+

MIC7300

OUT

= V

Figure 4. Voltage Follower/Buffer

VOUT

0V to V+

V+

2.2V to 10V

VIN

0V to 2V

MIC7300

10Ω

1⁄2W

Load

0.5V to Q1 VCEO(sus)

IOUT

2N3904 VCEO = 40V

IC(max) = 200mA

{

Change Q1 and RS

for higher current

and/or different gain.

R100mA/V as shown

OUT IN

Figure 5. Voltage-Controlled Current Sink

V+

100k

OUT

V+

MIC7300

0.001µF

100k

V+

Figure 6. Square Wave Oscillator

330k

33k

330k

1µF

VOUT

V+

MIC7300

V+

COUT

AR2

R1 330k

33k 10

=− = =−

Figure 7. AC-Coupled Inverting Amplifier

MIC7300 Micrel

MIC7300 10 June 2005

Package Information

0.20 (0.008)

0.09 (0.004)

0.60 (0.024)

0.10 (0.004)

3.02 (0.119)

2.80 (0.110) 10°

0°

3.00 (0.118)

2.60 (0.102)

1.75 (0.069)

1.50 (0.059)

0.95 (0.037) REF

1.30 (0.051)

0.90 (0.035)

0.15 (0.006)

0.00 (0.000)

DIMENSIONS:

MM (INCH)

0.50 (0.020)

0.35 (0.014)

1.90 (0.075) REF

SOT-23-5 (M5)

0.008 (0.20)

0.004 (0.10) 0.039 (0.99)

0.035 (0.89)

0.021 (0.53)

0.012 (0.03) R

0.0256 (0.65) TYP

0.012 (0.30) R

5° MAX

0° MIN

0.122 (3.10)

0.112 (2.84)

0.120 (3.05)

0.116 (2.95)

0.012 (0.03)

0.007 (0.18)

0.005 (0.13)

0.043 (1.09)

0.038 (0.97)

0.036 (0.90)

0.032 (0.81)

DIMENSIONS:

INCH (MM)

0.199 (5.05)

0.187 (4.74)

8-Pin MSOP (MM)

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MIC7300 12 June 2005

MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com

This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or

other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.