LMP91050

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SNAS517D – NOVEMBER 2011 – REVISED MARCH 2013

Electrical Characteristics

(1) (continued)

Symbol

Parameter

Conditions

Units

VINMAX

Max input signal

GAIN = 4 V/V

1.65

V

VINMIN

Min input signal

0.82

V

G

Gain

Programmable in 4 steps

4

32

V/V

GE

Gain Error

Any gain

2.5

%

VDD –

VOUT

Output Voltage Range

0.2

V

0.2

100mV input sine 35kHz signal, Gain = 8, VOUT

PhDly

Phase Delay

1

µs

Phase Delay variation with

250mV input step signal, Gain = 8, Vout

TCPhDly

84

ns

Temperature

measured at Vdd/2

SSBW

Small Signal Bandwidth

Gain = 32 V/V

360

kHz

Cin

Input Capacitance

5

pF

CLOAD,

OUT Pin Load Capacitance

Series RC

1

µF

OUT

RLOAD,

OUT Pin Load Resistance

Series RC

1

k

Ω

OUT

Combined Amplifier Chain Specification

Combination of both current and voltage noise,

en

Input-Referred Noise Density

with a 86k

Ω source impedance at 5Hz, Gain =

30

nV/

√Hz

7986

Combination of both current and voltage noise,

0.12

Input-Referred Integrated Noise with a 86k

Ω source impedance 0.1Hz to 10Hz,

0.1

µVrms

(4)

Gain = 7986

PGA1 GAIN = 42, PGA2 GAIN = 4

167

PGA1 GAIN = 42, PGA2 GAIN = 8

335

PGA1 GAIN = 42, PGA2 GAIN = 16

669

PGA1 GAIN = 42, PGA2 GAIN = 32

1335

G

Gain

V/V

PGA1 GAIN = 250, PGA2 GAIN = 4

1002

PGA1 GAIN = 250, PGA2 GAIN = 8

2004

PGA1 GAIN = 250, PGA2 GAIN = 16

4003

PGA1 GAIN = 250, PGA2 GAIN = 32

7986

GE

Gain Error

Any gain

5

%

TCCGE

100

ppm/°C

PSRR

Power Supply Rejection Ratio

DC, 3.0V to 3.6V supply, gain = 1002V/V

90

110

dB

1mV input step signal, Gain = 1002, Vout

PhDly

Phase Delay

measured at Vdd/2

9

µs

Phase Delay variation with

1mV input step signal, Gain=1002, Vout

TCPhDly

measured at Vdd/2

500

ns

(4)

Specified by design and characterization. Not tested on shipped production material.

(5)

TCCGE and TCVOS are calculated by taking the largest slope between -40°C and 25°C linear interpolation and 25°C and 85°C linear

interpolation.

(6)

TCPhDly is largest change in phase delay between -40°C and 25°C measurements and 25°C and 85°C measurements.

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