NSC LMP2232BMMX, LMP2232 Datasheet

January 15, 2008

LMP2232 Dual Micropower, 1.8V, Precision, Operational Amplifier with CMOS Input

General Description

The LMP2232 is a dual micropower precision amplifier designed for battery powered applications. The 1.8V to 5.0V guaranteed supply voltage range and quiescent power consumption of only 29 μW extend the battery life in portable systems. The LMP2232 is part of the LMP® precision amplifier family. The high impedance CMOS input makes it ideal for instrumentation and other sensor interface applications.

The LMP2232 has a maximum offset voltage of 150 μV and maximum offset voltage drift of only 0.5 μV/°C along with low bias current of only ±20 fA. These precise specifications make the LMP2232 a great choice for maintaining system accuracy and long term stability.

The LMP2232 has a rail-to-rail output that swings 15 mV from the supply voltage, which increases system dynamic range. The common mode input voltage range extends 200 mV below the negative supply, thus the LMP2232 is ideal for ground sensing in single supply applications.

The LMP2232 is offered in 8-pin SOIC and MSOP packages. The LMP2231 is the single version of this product and the

LMP2234 is the quad version of this product. Both of these products are available on National Semiconductor's website.

Features

(For VS = 5V, Typical unless otherwise noted)

■

Supply current (per channel) 10 µA

■

Operating voltage range 1.6V to 5.5V

■

Low TCV

OS

±0.5 µV/°C (max)

■

V

OS

±150 µV (max)

■

Input bias current 20 fA

■

PSRR 120 dB

■

CMRR 97 dB

■

Open loop gain 120 dB

■

Gain bandwidth product 130 kHz

■

Slew rate 58 V/ms

■

Input voltage noise, f = 1 kHz 60 nV/√Hz

■

Temperature range –40°C to 125°C

Applications

■

Precision instrumentation amplifiers

■

Battery powered medical instrumentation

■

High impedance sensors

■

Strain gauge bridge amplifier

■

Thermocouple amplifiers

Typical Application

30033974

Strain Gauge Bridge Amplifier

LMP® is a registered trademark of National Semiconductor Corporation.

LMP2232 Dual 1.8V, Micropower, Precision, Operational Amplifier with CMOS Input

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

ESD Tolerance (Note 2) Human Body Model 2000V Machine Model 100V Differential Input Voltage ±300 mV Supply Voltage (VS = V+ - V–)

6V Voltage on Input/Output Pins V+ + 0.3V, V– – 0.3V

Storage Temperature Range −65°C to 150°C Junction Temperature (Note 3) 150°C

Mounting Temperature Infrared or Convection (20 sec.) +235°C

Wave Soldering Lead Temperature (10 sec.) +260°C

Operating Ratings (Note 1)

Operating Temperature Range (Note 3) −40°C to 125°C Supply Voltage (VS = V+ - V–)

1.6V to 5.5V

Package Thermal Resistance (θJA)(Note 3)

8-Pin SOIC 111.2 °C/W 8-Pin MSOP 147.4 °C/W

5V DC Electrical Characteristics (Note 4) Unless otherwise specified, all limits guaranteed for T

A

= 25°C,

V+ = 5V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

V

OS

Input Offset Voltage ±10 ±150

±230

μV

TCV

OS

Input Offset Voltage Drift LMP2232A ±0.3 ±0.5

μV/°C

LMP2232B ±0.3 ±2.5

I

BIAS

Input Bias Current 0.02 ±3

±125

pA

I

OS

Input Offset Current 5 fA

CMRR Common Mode Rejection Ratio

0V ≤ VCM ≤ 4V

81

80

97

dB

PSRR Power Supply Rejection Ratio

1.6V ≤ V+ ≤ 5.5V V− = 0V, VCM = 0V

83

120

dB

CMVR Common Mode Voltage Range

CMRR ≥ 80 dB CMRR ≥ 79 dB

−0.2

4.2

V

A

VOL

Large Signal Voltage Gain VO = 0.3V to 4.7V

RL = 10 kΩ to V+/2

110

108

120

dB

V

O

Output Swing High

RL = 10 kΩ to V+/2 VIN(diff) = 100 mV

17 50

50

mV

from either

rail

Output Swing Low

RL = 10 kΩ to V+/2 VIN(diff) = −100 mV

17 50

50

I

O

Output Current (Note 7) Sourcing, VO to V

−

VIN(diff) = 100 mV

27

19

30

mA

Sinking, VO to V

+

VIN(diff) = −100 mV

17

12

22

I

S

Supply Current 19 27

28

μA

5V AC Electrical Characteristics (Note 4) Unless otherwise specified, all limits guaranteed for T

A

= 25°C,

V+ = 5V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

GBW Gain-Bandwidth Product

CL = 20 pF, RL = 10 kΩ

130 kHz

SR Slew Rate AV = +1 Falling Edge 33

32

58

V/ms

Rising Edge 33

32

48

θ

m

Phase Margin

CL = 20 pF, RL = 10 kΩ

68 deg

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LMP2232

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

G

m

Gain Margin

CL = 20 pF, RL = 10 kΩ

27

dB

e

n

Input-Referred Voltage Noise Density f = 1 kHz 60

nV/

Input Referred Voltage Noise 0.1 Hz to 10 Hz 2.3

μV

PP

i

n

Input-Referred Current Noise f = 1 kHz 10

fA/

THD+N Total Harmonic Distortion + Noise

f = 100 Hz, RL = 10 kΩ

0.002

%

3.3V DC Electrical Characteristics (Note 4) Unless otherwise specified, all limits guaranteed for

T A = 25°C, V+ = 3.3V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

V

OS

Input Offset Voltage ±10 ±160

±250

μV

TCV

OS

Input Offset Voltage Drift LMP2232A ±0.3 ±0.5

μV/°C

LMP2232B ±0.3 ±2.5

I

BIAS

Input Bias Current 0.02 ±3

±125

pA

I

OS

Input Offset Current 5

fA

CMRR Common Mode Rejection Ratio

0V ≤ VCM ≤ 2.3V

79

77

92

dB

PSRR Power Supply Rejection Ratio

1.6V ≤ V+ ≤ 5.5V V− = 0V, VCM = 0V

83

120

dB

CMVR Common Mode Voltage Range

CMRR ≥ 78 dB CMRR ≥ 77 dB

−0.2

2.5

V

A

VOL

Large Signal Voltage Gain VO = 0.3V to 3V

RL = 10 kΩ to V+/2

108

107

120

dB

V

O

Output Swing High

RL = 10 kΩ to V+/2 VIN(diff) = 100 mV

14 50

50

mV

from either

rail

Output Swing Low

RL = 10 kΩ to V+/2 VIN(diff) = −100 mV

14 50

50

I

O

Output Current (Note 7) Sourcing, VO to V

−

VIN(diff) = 100 mV

11

8

14

mA

Sinking, VO to V

+

VIN(diff) = −100 mV

8

5

11

I

S

Supply Current 17 25

26

μA

3.3V AC Electrical Characteristics (Note 4) Unless otherwise is specified, all limits guaranteed for

TA = 25°C, V+ = 3.3V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

GBW Gain-Bandwidth Product

CL = 20 pF, RL = 10 kΩ

128 kHz

SR Slew Rate AV = +1, CL = 20 pF

RL = 10 kΩ

Falling Edge 58

V/ms

Rising Edge 48

θ

m

Phase Margin

CL = 20 pF, RL = 10 kΩ

66 deg

G

m

Gain Margin

CL = 20 pF, RL = 10 kΩ

26 dB

e

n

Input-Referred Voltage Noise Density f = 1 kHz 60

nV/

Input-Referred Voltage Noise 0.1 Hz to 10 Hz 2.4

μV

PP

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LMP2232

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

i

n

Input-Referred Current Noise f = 1 kHz 10

fA/

THD+N Total Harmonic Distortion + Noise

f = 100 Hz, RL = 10 kΩ

0.003

%

2.5V DC Electrical Characteristics (Note 4) Unless otherwise specified, all limits guaranteed for

TA = 25°C, V+ = 2.5V, V− = 0V, VCM = VO = V+/2, and RL > 1MΩ. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

V

OS

Input Offset Voltage ±10 ±190

±275

μV

TCV

OS

Input Offset Voltage Drift LMP2232A ±0.3 ±0.5

μV/°C

LMP2232B ±0.3 ±2.5

I

Bias

Input Bias Current 0.02 ±3

±125

pA

I

OS

Input Offset Current 5

fA

CMRR Common Mode Rejection Ratio

0V ≤ VCM ≤ 1.5V

77

76

91

dB

PSRR Power Supply Rejection Ratio

1.6V ≤ V+ ≤ 5.5V V– = 0V, VCM = 0V

83

120

dB

CMVR Common Mode Voltage Range

CMRR ≥ 77 dB CMRR ≥ 76 dB

−0.2

1.7

V

A

VOL

Large Signal Voltage Gain VO = 0.3V to 2.2V

RL = 10 kΩ to V+/2

104

120

dB

V

O

Output Swing High

RL = 10 kΩ to V+/2 VIN(diff) = 100 mV

12 50

50

mV

from either

rail

Output Swing Low

RL = 10 kΩ to V+/2 VIN(diff) = –100 mV

13 50

50

I

O

Output Current (Note 7) Sourcing, VO to V

–

VIN(diff) = 100 mV

5

4

8

mA

Sinking, VO to V

+

VIN(diff) = –100 mV

3.5

2.5

7

I

S

Supply Current 16 24

25

µA

2.5V AC Electrical Characteristics (Note 4) Unless otherwise specified, all limits guaranteed for

TA = 25°C, V+ = 2.5V, V− = 0V, VCM = VO = V+/2, and RL > 1MΩ. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

GBW Gain-Bandwidth Product

CL = 20 pF, RL = 10 kΩ

128 kHz

SR Slew Rate AV = +1, CL = 20 pF

RL = 10 kΩ

Falling Edge 58

V/ms

Rising Edge 48

θ

m

Phase Margin

CL = 20 pF, RL = 10 kΩ

64 deg

G

m

Gain Margin

CL = 20 pF, RL = 10 kΩ

26

dB

e

n

Input-Referred Voltage Noise Density f = 1 kHz 60

nV/

Input-Referred Voltage Noise 0.1 Hz to 10 Hz 2.5

μV

PP

i

n

Input-Referred Current Noise f = 1 kHz 10

fA/

THD+N Total Harmonic Distortion + Noise

f = 100 Hz, RL = 10 kΩ

0.005 %

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LMP2232

1.8V DC Electrical Characteristics (Note 4) Unless otherwise specified, all limits guaranteed for

T A = 25°C, V+ = 1.8V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

V

OS

Input Offset Voltage ±10 ±230

±325

μV

TCV

OS

Input Offset Voltage Drift LMP2232A ±0.3 ±0.5

μV/°C

LMP2232B ±0.3 ±2.5

I

BIAS

Input Bias Current 0.02 ±3

±125

pA

I

OS

Input Offset Current 5 fA

CMRR Common Mode Rejection Ratio

0V ≤ VCM ≤ 0.8V

76

75

92

dB

PSRR Power Supply Rejection Ratio

1.6V ≤ V+ ≤ 5.5V V− = 0V, VCM = 0V

83

120

dB

CMVR Common Mode Voltage Range

CMRR ≥ 76 dB CMRR ≥ 75 dB

−0.2

0

1.0

V

A

VOL

Large Signal Voltage Gain VO = 0.3V to 1.5V

RL = 10 kΩ to V+/2

103

120

dB

V

O

Output Swing High

RL = 10 kΩ to V+/2 VIN(diff) = 100 mV

12 50

50

mV

from either

rail

Output Swing Low

RL = 10 kΩ to V+/2 VIN(diff) = −100 mV

13 50

50

I

O

Output Current (Note 7) Sourcing, VO to V

–

VIN(diff) = 100 mV

2.5

2

5

mA

Sinking, VO to V

+

VIN(diff) = −100 mV

2

1.5

5

I

S

Supply Current 16 24

25

µA

1.8V AC Electrical Characteristics (Note 4) Unless otherwise is specified, all limits guaranteed for

TA = 25°C, V+ = 1.8V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

GBW Gain-Bandwidth Product

CL = 20 pF, RL = 10 kΩ

127 kHz

SR Slew Rate AV = +1, CL = 20 pF

RL = 10 kΩ

Falling Edge 58

V/ms

Rising Edge 48

θ

m

Phase Margin

CL = 20 pF, RL = 10 kΩ

60 deg

G

m

Gain Margin

CL = 20 pF, RL = 10 kΩ

25

dB

e

n

Input-Referred Voltage Noise Density f = 1 kHz 60

nV/

Input-Referred Voltage Noise 0.1 Hz to 10 Hz 2.4

μV

PP

i

n

Input-Referred Current Noise f = 1 kHz 10

fA/

THD+N Total Harmonic Distortion + Noise

f = 100 Hz, RL = 10 kΩ

0.005 %

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LMP2232

Note 1: Absolute Maximum Ratings indicate limits beyond which damage may occur. Operating Ratings indicate conditions for which the device is intended to

be functional, but specific performance is not guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.

Note 2: Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of JEDEC)

Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).

Note 3: The maximum power dissipation is a function of T

J(MAX)

, θJA, and TA. The maximum allowable power dissipation at any ambient temperature is

PD = (T

J(MAX)

– TA)/ θJA. All numbers apply for packages soldered directly onto a PC board.

Note 4: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of the device such that TJ = TA. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self-heating where TJ > TA. Absolute Maximum Ratings indicate junction temperature limits beyond which the device may be permanently degraded, either mechanically or electrically.

Note 5: Typical values represent the most likely parametric norm at the time of characterization. Actual typical values may vary over time and will also depend on the application and configuration. The typical values are not tested and are not guaranteed on shipped production material.

Note 6: All limits are guaranteed by testing, statistical analysis or design.

Note 7: The short circuit test is a momentary open loop test.

Connection Diagram

8-Pin MSOP/SOIC

30033938

Top View

Ordering Information

Package Part Number Temperature

Range

Package Marking Transport Media NSC Drawing

8-Pin SOIC

LMP2232AMA

–40°C to 125°C

LMP2232AMA

95 Units/Rail

M08A

LMP2232AMAE 250 Units Tape and Reel

LMP2232AMAX 2.5k Units Tape and Reel

LMP2232BMA

95 Units/Rail

LMP2232BMAE 250 Units Tape and Reel

LMP2232BMAX 2.5k Units Tape and Reel

8-Pin MSOP

LMP2232AMM

AK5A

1k Units Tape and Reel

MUA08A

LMP2232AMME 250 Units Tape and Reel

LMP2232AMMX 3.5k Units Tape and Reel

LMP2232BMM

AK5B

1k Units Tape and Reel

LMP2232BMME 250 Units Tape and Reel

LMP2232BMMX 3.5k Units Tape and Reel

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LMP2232