NSC LMP2234, LMP2234AMDC Datasheet

January 16, 2008

LMP2234 Quad
Micropower, Precision, RRO Amplifier with CMOS Input

General Description

The LMP2234 is a quad micropower precision amplifier de­signed for battery powered applications. The 1.8 to 5.5V
guaranteed supply voltage range and quiescent power con­sumption of only 56 μW extend the battery life in portable
systems. The LMP2234 is part of the LMP® precision amplifier
family. The high impedance CMOS input makes it ideal for
instrumentation and other sensor interface applications.

The LMP2234 has a maximum offset voltage of 150 μV and

0.3 μV/°C offset drift along with low bias current of only
±20 fA. These precise specifications make the LMP2234 a
great choice for maintaining system accuracy and long term
stability.

The LMP2234 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 LMP2234 is ideal for ground
sensing in single supply applications.

The LMP2234 is offered in 14-Pin SOIC and TSSOP pack­ages.

Features

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

■

Supply current (per channel) 9 µA

■

Operating voltage range 1.6V to 5.5V

■

Low TCV

OS

±0.75 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

Strain Gauge Bridge Amplifier

20203468

LMP® is a registered trademark of National Semiconductor Corporation.

© 2008 National Semiconductor Corporation 202034 www.national.com

LMP2234 Quad Micropower, Precision, RRO, 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)

14-Pin SOIC 101.5 °C/W
14-Pin TSSOP 121 °C/W

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

TA = 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 LMP2234A ±0.3 ±0.75

μV/°C

LMP2234B ±0.3 ±2.5

I

BIAS

Input Bias Current ±0.02 ±1

±50

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
VCM = 0V

83

82

120

dB

CMVR Common Mode Voltage Range

CMRR ≥ 80 dB
CMRR ≥ 79 dB

−0.2

−0.2

4.2

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 36 48

50

µA

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

TA = 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

GBWP 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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LMP2234 Quad

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 Density 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 are 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

V

OS

Input Offset Voltage ±10 ±160

±250

μV

TCV

OS

Input Offset Voltage Drift LMP2234A ±0.3 ±0.75

μV/°C

LMP2234B ±0.3 ±2.5

I

BIAS

Input Bias Current ±0.02 ±1

±50

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
VCM = 0V

83

82

120

dB

CMVR Common Mode Voltage Range

CMRR ≥ 78 dB
CMRR ≥ 77 dB

−0.2

−0.2

2.5

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 34 44

46

µA

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

GBWP 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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LMP2234 Quad

Symbol Parameter Conditions Min

(Note 6)

Typ

(Note 5)

Max

(Note 6)

Units

i

n

Input-Referred Current Noise Density 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 are 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 LMP2234A ±0.3 ±0.75

μV/°C

LMP2234B ±0.3 ±2.5

I

BIAS

Input Bias Current ±0.02 ±1.0

±50

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
VCM = 0V

83

82

120

dB

CMVR Common Mode Voltage Range

CMRR ≥ 77 dB
CMRR ≥ 76 dB

−0.2

−0.2

1.7

1.7

V

A

VOL

Large Signal Voltage Gain VO = 0.3V to 2.2V

RL = 10 kΩ to V+/2

104

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 32 44

46

µA

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

GBWP 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 Density f = 1 kHz 10

fA/

THD+N Total Harmonic Distortion + Noise

f = 100 Hz, RL = 10 kΩ

0.005 %

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LMP2234 Quad

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

V

OS

Input Offset Voltage ±10 ±230

±325

μV

TCV

OS

Input Offset Voltage Drift LMP2234A ±0.3 ±0.75

μV/°C

LMP2234B ±0.3 ±2.5

I

BIAS

Input Bias Current ±0.02 ±1.0

±50

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
VCM = 0V

83

82

120

dB

CMVR Common Mode Voltage Range

CMRR ≥ 76 dB
CMRR ≥ 75 dB

-0.2

0

1.0

1.0

V

A

VOL

Large Signal Voltage Gain VO = 0.3V to 1.5V

RL = 10 kΩ to V+/2

103

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 31 42

44

µA

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

GBWP 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

70 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 Density f = 1 kHz 10

fA/

THD+N Total Harmonic Distortion + Noise

f = 100 Hz, RL = 10 kΩ

0.005 %

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LMP2234 Quad

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. 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 as determined 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

14-Pin TSSOP/SOIC

20203404

Ordering Information

Package Part Number Temperature

Range

Package Marking Transport Media NSC Drawing

14-Pin SOIC

LMP2234AMA

-40°C to 125°C

LMP2234AMA

55 Units/Rail

M14A

LMP2234AMAE 250 Units Tape and Reel

LMP2234AMAX 2.5k Units Tape and Reel

LMP2234BMA

LMP2234BMA

55 Units/Rail

LMP2234BMAE 250 Units Tape and Reel

LMP2234BMAX 2.5k Units Tape and Reel

14-Pin TSSOP

LMP2234AMT

LMP2234AMT

94 Units/Rail

MTC14

LMP2234AMTE 250 Units Tape and Reel

LMP2234AMTX 2.5k Units Tape and Reel

LMP2234BMT

LMP2234BMT

94 Units/Rail

LMP2234BMTE 250 Units Tape and Reel

LMP2234BMTX 2.5k Units Tape and Reel

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LMP2234 Quad