AD8420ARMZ-R7 datasheet(2/10 Pages) AD

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AD8420

Preliminary Technical Data

Rev. PrD | Page 2 of 2

SPECIFICATIONS

+VS = +5V, −VS = 0V, VREF = 0 V, VIN+=0V, VIN-=0V, TA = 25°C, G = 1 to 1000, RL = 20 kΩ, specifications referred to input, unless

otherwise noted

Table 2.

Parameter

Conditions

Min

Typ

Max

Unit

COMMON-MODE REJECTION RATIO (CMRR)

VCM = 0 V to 2.7 V

CMRR DC to 60 Hz

100

CMRR at 1 kHz

NOISE

Voltage Noise

Spectral Density

f = 1 kHz, VDIFF ≤100 mV

nV/√Hz

Peak to Peak

f = 0.1 Hz to 10 Hz, VDIFF ≤ 100 mV

1.5

µV p-p

Current Noise

Spectral Density

f = 1 kHz

fA/√Hz

Peak to Peak

f = 0.1 Hz to 10 Hz

pA p-p

VOLTAGE OFFSET

Offset

200

µV

Average Temperature Coefficient

TA = −40°C to +85°C

µV/°C

Offset RTI vs. Supply (PSR)

INPUTS

Valid for REF & FB pair, as well as +IN & -IN

Input Bias Current1

TA = +25°C

TA = +85°C

TA = −40°C

Average Temperature Coefficient

TA = −40°C to +85°C

pA/°C

Input Offset Current

TA = +25°C

TA = +85°C

TA = −40°C

Average Temperature Coefficient

TA = −40°C to +85°C

pA/°C

Input Impedance

Differential

130||2

MΩ||pF

Common Mode

1000||2

MΩ||pF

Differential Input Operating Voltage

TA = –40°C to +85°C

-1

Input Operating Voltage (+IN, -IN, or REF)

TA = +25°C

−VS – 0.15

+VS −2.2

TA = +85°C

−VS – 0.05

+VS – 1.8

TA = –40°C

−VS – 0.2

+VS – 2.7

DYNAMIC RESPONSE

Small Signal –3 dB Bandwidth

G = 1

250

kHz

G = 10

kHz

G = 100

2.5

kHz

G =1000

0.25

kHz

Settling Time 0.01%

4 V step

G = 10

µs

G = 100

µs

G = 1000

µs

Slew Rate

Exceeds Bandwidth Limit

V/µs

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