AD7732 datasheet(3/32 Pages) AD

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AD7732

Rev. 0 | Page 3 of 32

AD7732—SPECIFICATIONS

Table 1. (–40°C to +105°C; AVDD = 5 V ± 5%; DVDD = 2.7 V to 3.6 V, or 5 V ± 5%; BIAS (all), REFIN(+) = 2.5 V;

REFIN(–) = AGND; RA, RB, RC, RD open circuit; AIN Range = ±10 V; fMCLKIN = 6.144 MHz; unless otherwise noted.)

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

ADC PERFORMANCE

CHOPPING ENABLED

Conversion Time Rate

372

12190

Configure via Conv. Time Register

No Missing Codes1, 2

Bits

FW ≥ 6 (Conversion Time ≥ 165 µs)

Output Noise

See

Table 4

Resolution

See Table 5

and Table 6

Integral Nonlinearity (INL) 1, 2, 3

±0.0003

±0.0015

% of FSR

fMCLKIN = 2.5 MHz, VCM = 0 V

Integral Nonlinearity (INL) 2, 3

±0.0010

±0.0030

% of FSR

fMCLKIN = 6.144 MHz, VCM = 0 V

Offset Error (Unipolar, Bipolar)4

±10

Before Calibration

Offset Drift vs. Temperature1

±2.5

µV/°C

Gain Error3

±0.7

Before Calibration

Gain Drift vs. Temperature1

±3.2

ppm of FS/°C

Positive Full-Scale Error4

±0.7

% of FSR

Before Calibration

Positive Full-Scale Drift vs. Temp.1

±3

ppm of FS/°C

Bipolar Negative Full-Scale Error5

±0.0060

% of FSR

After Calibration

Common-Mode Rejection

At DC

Power Supply Sensitivity

±4

±10

LSB16

At DC, AIN = 7 V, AVDD = 5 V ± 5%

Channel-to-Channel Isolation

100

At DC, Maximum ±16.5 V AIN Voltage

ADC PERFORMANCE

CHOPPING DISABLED

Conversion Time Rate

737

15437

Configure via Conv. Time Register

No Missing Codes1, 2

Bits

FW ≥ 8 (Conversion Time ≥ 117 µs)

Output Noise

See Table 7

Resolution

See Table 8

and Table 9

Integral Nonlinearity (INL) 2, 3

±0.0015

% of FSR

Offset Error (Unipolar, Bipolar)6

±10

Before Calibration

Offset Drift vs. Temperature

±25

µV/°C

Gain Error4

±0.5

Before Calibration

Gain Drift vs. Temperature

±5.3

ppm of FS/°C

Positive Full-Scale Error4

±0.5

% of FSR

Before Calibration

Positive Full-Scale Drift vs. Temp.

±4

ppm of FS/°C

Bipolar Negative Full-Scale Error5

±0.0060

% of FSR

After Calibration

Common-Mode Rejection

At DC

Power Supply Sensitivity

±4

LSB16

At DC, AIN = 7 V, AVDD = 5 V ± 5%

Channel-to-Channel Isolation

100

At DC, Maximum ±16.5 V AIN Voltage

ANALOG INPUTS

Analog Input Differential Voltage7

±10 V Range

±10

0 V to +10 V Range

0 to +10

±5 V Range

±5

0 V to +5 V Range

0 to +5

AIN Absolute Voltage1, 2, 8

–16.5

+16.5

BIAS Voltage1

2.5

AVDD

RA, RB, RC, RD Voltage1

–10.5

+20

AIN Impedance1, 9

100

124

kΩ

AIN Pin Impedance1, 9

87.5

108.5

kΩ

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