AD7719 データシートの表示（PDF） - Analog Devices

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AD7719

Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual Σ-Δ ADC

Analog Devices 

AD7719

Parameter

AUXILIARY CHANNEL (continued)

Offset Error3

Offset Error Drift vs. Temperature4

Full-Scale Error6, 7

Gain Drift vs. Temperature4

Negative Full-Scale Error

Power Supply Rejection (PSR)

ANALOG INPUTS

Differential Input Voltage Ranges

Absolute AIN Voltage Limits

Analog Input Current

DC Input Current

DC Input Current Drift

Normal-Mode Rejection2, 8

@ 50 Hz

@ 60 Hz

Common-Mode Rejection

@ DC

@ 50 Hz2

@ 60 Hz2

REFERENCE INPUT (REFIN2)

REFIN2 Voltage

REFIN2 Range2

Reference DC Input Current2

Reference DC Input Current Drift

EXCITATION CURRENT SOURCES

(IEXC1 and IEXC2)

Output Current

Initial Tolerance at 25°C

Drift

Initial Current Matching at 25°C

AD7719B

±3

±10

±0.75

0.5

±1

70

±REFIN2

±REFIN2/2

AGND – 30 mV

AVDD + 30 mV

±125

±2

100

100

85

90

90

2.5

1

AVDD

0.2

0.003

200

±10

200

±1

Drift Matching

Line Regulation (AVDD)

Load Regulation

Output Compliance

LOW-SIDE POWER SWITCHES

(SW1, SW2)

RON

Allowable Current2

TEMPERATURE SENSOR

Accuracy

TRANSDUCER BURNOUT

AIN(+) Current

AIN(–) Current

Initial Tolerance @ 25°C

Drift

SYSTEM CALIBRATION2, 9

Full-Scale Calibration Limit

Zero-Scale Calibration Limit

Input Span

20

2.1

300

AVDD – 0.6

AGND – 30 mV

5

7

20

See TPC 5

–100

100

±15

0.03

1.05 × FS10

–1.05 × FS

0.8 × FS

2.1 × FS

Unit

µV typ

nV/°C typ

LSB typ

ppm/°C typ

LSB typ

dB min

V nom

V nom

V min

V max

nA/V typ

pA/V/°C typ

dB min

dB min

dB min

dB min

dB min

V nom

V min

V max

µA/V typ

nA/V/°C typ

µA nom

% typ

ppm/°C typ

% typ

ppm/°C typ

µA/V max

nA/V typ

V max

V min

Ω max

Ω max

mA max

°C typ

nA typ

nA typ

% typ

%/°C typ

V max

V min

V min

V max

Test Conditions

Selected Channel = AIN5/AIN6

AIN = 1 V Input Range = ±2.5 V, Typically 80 dB

ARN = 1

ARN = 0

Unbuffered Input

Input Current Varies with Input Voltage

50 Hz ±1 Hz, SF = 82

60 Hz ±1 Hz, SF = 68

Input Range = ±2.5 V, AIN = 1 V

50 Hz ±1 Hz, Range = 2.5 V, AIN = 1 V

60 Hz ±1 Hz, Range = 2.5 V, AIN = 1 V

With Respect to AGND

Matching between IEXC1 and IEXC2

No Load

AVDD = 5 V ± 5%. Typically 1.25 µA/V

AVDD = 5 V. Typically 3 Ω

AVDD = 3 V. Typically 4.5 Ω

Continuous Current per Switch

–4–

REV. A

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