AD7779ACPZ datasheet(8/101 Pages) AD

8 / 101 page

Data Sheet

AD7779

Rev. A | Page 7 of 100

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

Reference buffer enabled,

high resolution mode

nA/V

Reference buffer enabled,

low power mode

nA/V

TEMPERATURE RANGE

Specified Performance

TMIN to TMAX

−40

+105

°C

Functional2

TMIN to TMAX

−40

+125

°C

TEMPERATURE SENSOR

Accuracy

±2

°C

DIGITAL FILTER RESPONSE

(SINC3)

Group Delay

See the SRC Group

Delay section

Settling Time

See the Settling

Time section

Pass Band

−0.1 dB

See the SRC

Bandwidth section

−3 dB

See the SRC

Bandwidth section

Decimation Rate

High resolution mode

128

4095.99

Low power mode

4095.99

CLOCK SOURCE

Frequency

High resolution mode

0.655

8.192

MHz

Low power mode

1.3

4.096

MHz

Duty Cycle

45:55

50:50

55:45

Σ-Δ ADC

Speed and Performance

Resolution

Bits

ODR

High resolution mode

kSPS

Low power mode

kSPS

No Missing Codes

Bits

AC Accuracy

Dynamic Range

Shorted inputs, PGAGAIN = 1

16 kSPS

High resolution mode

108

4 kSPS

High resolution mode

116

Low power mode

106

1 kSPS

Low power mode

116

THD

−0.5 dBFS, high resolution mode

−109

−0.5 dBFS, low power mode

−105

SINAD

fIN = 60 Hz

106

SFDR

High resolution mode, 16 kSPS,

PGAGAIN = 1

132

Intermodulation Distortion

(IMD)

fA = 50 Hz, fB = 51 Hz, high

resolution mode

−125

fA = 50 Hz, fB = 51 Hz, low power

mode

−105

DC Power Supply Rejection

AVDD1x = 3.3 V

−90

DC Common-Mode

Rejection Ratio

Crosstalk

−120

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