AD7739 datasheet(3/32 Pages) AD

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AD7739

Rev. 0 | Page 3 of 32

AD7739—SPECIFICATIONS

Table 1. (–40°C to +105°C; AVDD = 5 V ± 5%; DVDD = 2.7 V to 3.6 V, or 5 V ± 5%; REFIN(+) = 2.5 V; REFIN(–) = 0 V,

AINCOM = 2.5 V; Internal Buffer On, AIN Range = ±1.25 V; fMCLKIN = 6.144 MHz; unless otherwise noted.)

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

ADC PERFORMANCE

CHOPPING ENABLED

Conversion Time Rate

372

11840

Configure via Conv. Time Register

No Missing Codes1, 2

Bits

≥ 12 (Conversion Time ≥ 290 µs)

Output Noise

See Table 4

Resolution

See Table 5

and Table 6

Integral Nonlinearity (INL)2

±5

±0.0015

% of FSR

Offset Error (Unipolar, Bipolar)3

±10

µV

Before Calibration

Offset Drift vs. Temperature1

±25

nV/°C

Gain Error3

±0.2

Before Calibration

Gain Drift vs. Temperature1

±2.5

ppm of FS/°C

Positive Full-Scale Error3

±0.2

% of FSR

Before Calibration

Positive Full-Scale Drift vs. Temp.1

±2.5

ppm of FS/°C

Bipolar Negative Full-Scale Error4

±0.0030

% of FSR

After Calibration

Common-Mode Rejection

At DC, AIN = 1 V

Power Supply Rejection

At DC, AIN = 1 V

ADC PERFORMANCE

CHOPPING DISABLED

Conversion Time Rate

737

15133

Configure via Conv. Time Register

No Missing Codes1, 2

Bits

≥ 12 (Conversion Time ≥ 290 µs)

Output Noise

See Table 7

Resolution

See Table 8

and Table 9

Integral Nonlinearity (INL)2

±0.0015

% of FSR

Offset Error (Unipolar, Bipolar)5

±1mV

Before Calibration

Offset Drift vs. Temperature

±1.5

µV/°C

Gain Error3

±0.2

Before Calibration

Gain Drift vs. Temperature

±2.5

ppm of FS/°C

Positive Full-Scale Error3

±0.2

% of FSR

Before Calibration

Positive Full-Scale Drift vs. Temp.

±2.5

ppm of FS/°C

Bipolar Negative Full-Scale Error4

±0.0030

% of FSR

After Calibration

Common-Mode Rejection

At DC, AIN = 1 V

Power Supply Rejection

At DC, AIN = 1 V

ANALOG INPUTS

Analog Input Voltage1, 6

±2.5 V Range

±2.5

+2.5 V Range

0 to +2.5

±1.25 V Range

±1.25

+1.25 V Range

0 to +1.25

±0.625 V Range

±0.625

+0.625 V Range

0 to +0.625

AIN, AINCOM Common-Mode/

Absolute Voltage1

0.2

AVDD – 0.3

Analog Input Slew Rate1, 7

0.5

V/Conv. Time

AIN Absolute Voltage > 3 V

AIN, AINCOM Input Current1, 8

Only One Channel, Chop Disabled

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