LMP8278 datasheet(4/23 Pages) TI

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LMP8278

SNAS575A – FEBRUARY 2012 – REVISED MARCH 2013

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5.0V Electrical Characteristics

(1)

Unless otherwise specified, all limits ensured at TA = 25°C, VS = 5.0V, GND = 0V, −2V ≤ VCM ≤ 28V, and RL = ∞, 10nF

between VS and GND. Boldface limits apply at the temperature extremes.

PARAMETER

TEST CONDITIONS

MIN(2)

TYP(3)

MAX(2)

UNIT

Overall Performance (From –IN (pin 1) and +IN (pin 8) to OUT (pin 5) with pins A1 (pin 3) and A2 (pin 4) connected)

Supply Current

0.3

0.4

0.55

Total Gain

–2V < VCM < 28V

13.93

14.07

V/V

–2V < VCM < 40V

13.86

14.14

Gain Drift

−40°C ≤ TA ≤ 125°C

±2

±25

ppm/°C

Slew Rate

VIN = ±0.2V

0.7

μs

Bandwidth

kHz

VOS

Input Offset Voltage

VCM = VS / 2

±0.25

±2

TCVOS

Input Offset Voltage Drift (4)

−40°C ≤ TA ≤ 125°C

±2.5

±15

μV/°C

Input Referred Voltage Noise

0.1 Hz

− 10 Hz, 6–Sigma

μVPP

Spectral Density, 1 kHz

285

nV/

√Hz

PSRR

Power Supply Rejection Ratio

DC,4.5V

≤ VS ≤ 5.5V, VCM = VS/2

Preamplifier (From input pins –IN (pin 1) and +IN (pin 8) to A1 (pin 3))

RCM

Input Impedance Common Mode

−2V ≤ VCM ≤ 40

100

125

Ω

RDM

Input Impedance Differential Mode (5)

−2V ≤ VCM ≤ 40

Ω

VOS

Input Offset Voltage

VCM = VS / 2

±0.25

±2

TCVOS

Input Offset Voltage Drift (4)

−40°C ≤ TA ≤ 125°C

±2.5

±15

μV/°C

DC CMRR

DC Common Mode Rejection Ratio

−2V ≤ VCM ≤ 40V

AC CMRR

AC Common Mode Rejection Ratio

f = 1 kHz

f = 10 kHz

CMVR

Input Common Mode Voltage Range

for 80 dB CMRR

−2

A1V

Gain

6.93

7.0

7.07

V/V

RF-INT

Output Impedance Filter Resistor

100

103

Ω

TCRF-INT

Output Impedance Filter Resistor Drift

±100

ppm/°C

A1 VOUT

Preamplifier Output Voltage Swing

VOL

RL = ∞

VOH

4.80

4.95

Output Buffer (From A2 (pin 4) to OUT (pin 5))

VOS

Input Offset Voltage

≤ VCM ≤ VS–1

±0.25

±2

A2V

Gain

1.98

2.02

V/V

Input Bias Current of Output Buffer(6)(5)

±20

A2 VOUT

Output Buffer Output Voltage Swing (7)(8)

VOL

RL = 100 kΩ

VOH

4.80

4.99

A2 VOUT

Output Buffer Output Voltage Swing (7)(8)

VOL

RL = 10 kΩ

VOH

4.75

4.95

(1)

The Electrical Characteristics table lists ensured specifications under the listed Recommended Operating Conditions except as

otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and

are not ensured.

(2)

Datasheet min/max specification limits are ensured by test, unless otherwise noted.

(3)

Typical values represent the most likely parameter norms at TA = +25°C and at the Recommended Operation Conditions at the time of

product characterization and are not ensured.

(4)

Offset voltage drift determined by dividing the change in VOS at temperature extremes by the total temperature change.

(5)

Specification is ensured by design and is not tested in production.

(6)

Positive current corresponds to current flowing into the device.

(7)

For this test input is driven from A1 stage.

(8)

For VOL, RL is connected to VS and for VOH, RL is connected to GND.

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