ADS7828-Q1

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SBAS456B – DECEMBER 2008 – REVISED JANUARY 2016

Electrical Characteristics for ADS7828E (continued)

+VDD = 5 V, VREF = External 5 V, SCL clock frequency = 3.4 MHz (high-speed mode), over operating free-air temperature

range, unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Power Supply

High-speed mode: SCL = 3.4 MHz

750

100

IQ

Quiescent current

Fast mode: SCL = 400 kHz

300

µA

Standard mode: SCL = 100 kHz

150

High-speed mode: SCL = 3.4 MHz

3.75

5

PO

Power dissipation

Fast mode: SCL = 400 kHz

1.5

µW

Standard mode: SCL = 100 kHz

0.75

High-speed mode: SCL = 3.4 MHz

400

Power-down current with wrong

Fast mode: SCL = 400 kHz

150

µA

address selected

Standard mode: SCL = 100 kHz

35

IPD

Full power-down current

SCL pulled high, SDA pulled high

400

3000

nA

6.8 Electrical Characteristics for ADS7828EB

+VDD = 5 V, VREF = External 5 V, SCL clock frequency = 3.4 MHz (high-speed mode), over operating free-air temperature

range, unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Analog Input

Ileak

Leakage current

±1

µA

CI

25

pF

Overall Performance

No missing codes

12

bits

Integral linearity error

±0.5

±1

LSB(1)

Differential linearity error

±0.5

–1 to 2

LSB

Offset error

±0.75

±2

LSB

Offset error match

±1

LSB

Gain error

±0.75

±2

LSB

Gain error match

±1

LSB

Vn

Noise

RMS

33

µV

PSRR

Power-supply ripple rejection

82

dB

Sampling Dynamics

High-speed mode: SCL = 3.4 MHz

50

Throughput frequency

Fast mode: SCL = 400 kHz

8

kHz

Standard mode: SCL = 100 kHz

2

Conversion time

6

µs

AC Accuracy

THD

Total harmonic distortion(2)

VIN = 25 VPP at 10 kHz

–82

dB

Signal-to-noise ratio

VIN = 25 VPP at 10 kHz

72

dB

Signal-to-(noise + distortion) ratio

VIN = 25 VPP at 10 kHz

71

dB

Spurious-free dynamic range

VIN = 25 VPP at 10 kHz

86

dB

Channel-to-channel isolation

120

dB

(1)

LSB means Least Significant Bit; with VREF equal to 5 V, one LSB is 1.22 mV.

(2)

THD is measured to the ninth harmonic.

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