ADA4255ACPZ-R7 datasheet(4/64 Pages) AD

4 / 64 page

Data Sheet

ADA4255

SPECIFICATIONS

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Rev. 0 | 4 of 64

TA = 25°C, VDDCP = 5 V, AVDD = 5 V, AVSS = 0 V, DVDD = 3.3 V, DVSS = 0 V, VOCM = AVDD/2, scaling gain = 1, and no load, unless

otherwise noted.

Table 1.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

OFFSET VOLTAGE

Total offset, referred to input (RTI) = VOSI + (VOSO/Gain)

Differential Offset Voltage

Input Offset Voltage (VOSI)

±3

±14

μV

Output Offset Voltage (VOSO)

±40

±125

μV

Differential Offset Voltage Drift

TA = −40°C to +105°C1, total offset drift, RTI = VOSI/T +

((VOSO/T)/ Gain)

VOSI/T

±0.03

±0.08

μV/°C

VOSO/T

±0.98

±2.5

μV/°C

Differential Offset Voltage vs. VDDCP

Power Supply Rejection Ratio

(PSRR), RTI

VDDCP = 2.7 V to 5.5 V

Gain (G) = 1/16 V/V

G = 1 V/V

G = 128 V/V

113

130

Differential Offset Voltage vs. AVDD

(PSRR), RTI

AVDD − AVSS = 2.7V to 5.5V

G = 1/16 V/V

G = 1 V/V

100

G = 128 V/V

115

130

Differential Offset vs. External Clock

Frequency, RTI

Clock frequency = 0.8 MHz to 1.2 MHz

G = 1/16 V/V

±0.2

μV/kHz

G = 1 V/V

±0.1

μV/kHz

G = 128 V/V

±0.002

μV/kHz

CMRR, RTI

+IN = −IN = (VSSH + 3 V) to (VDDH − 3 V)

G = 1/16 V/V

G = 1 V/V

111

122

G = 128 V/V

138

150

GAIN

Output voltage (VOUT) = 9.5 V p-p2

Input Gain Range

1/16 to 128

V/V

Output Scaling Gain Settings

1, 1.25, 1.375

V/V

Gain Error

Before Calibration

All gains

<±0.06

±0.12

Using Calibration Coefficient

All gains

<±0.01

±0.025

Gain Drift

All Gains Except the Following:

TA = −40°C to +105°C1

<±0.3

±1

ppm/°C

TA = −40°C to +105°C1, G = 1/16 V/V, all scaling gains

<±0.5

±1.5

ppm/°C

TA = −40°C to +105°C1, G = 32 V/V, all scaling gains

<±0.4

±1.5

ppm/°C

TA = −40°C to +105°C1, G = 64 V/V, all scaling gains

<±0.6

±2

ppm/°C

TA = −40°C to +105°C1, G = 128 V/V, all scaling gains

<±1.5

±4

ppm/°C

Nonlinearity

All gains except 32 V/V, 64 V/V, and 128 V/V2, 3

ppm

G = 32 V/V

7.5

ppm

G = 64 V/V

ppm

G = 128 V/V

ppm

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