AD7707_17 datasheet(5/53 Pages) AD

Part #	AD7707

Description	3-Channel 16-Bit, Sigma-Delta ADC

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AD7707

Rev. B | Page 4 of 52

SPECIFICATIONS

AVDD = DVDD = 3 V or 5 V, REF IN(+) = 1.225 V with AVDD = 3 V and 2.5 V with AVDD = 5 V; REF IN(−) = GND; VBIAS = REFIN(+);

MCLK IN = 2.4576 MHz unless otherwise noted. All specifications TMIN to TMAX, unless otherwise noted.

Table 1.

Parameter

B Version1

Unit

Conditions/Comments

STATIC PERFORMANCE

Low Level Input Channels (AIN1 and AIN2)

No Missing Codes

16

Bits min

Guaranteed by design; filter notch < 60 Hz

Output Noise

See

Table 7 to

Table 10

Depends on filter cutoffs and selected gain

Integral Nonlinearity2

±0.003

% of FSR max

Filter notch < 60 Hz; typically ±0.0003%

Unipolar Offset Error3

Unipolar Offset Drift4

0.5

μV/°C typ

Bipolar Zero Error3

Bipolar Zero Drift4

0.5

μV/°C typ

For gains of 1, 2, and 4

0.1

μV/°C typ

For gains of 8, 16, 32, 64, and 128

Positive Full-Scale Error3, 5

Full-Scale Drift4, 6

0.5

μV/°C typ

Gain Error3, 7

Gain Drift4, 8

0.5

ppm of FSR/°C typ

Bipolar Negative Full-Scale Error2

±0.003

% of FSR max

Typically ±0.0007%

Bipolar Negative Full-Scale Drift4

1

μV/°C typ

For gains of 1 to 4

0.6

μV/°C typ

For gains of 8 to 128

HIGH LEVEL INPUT CHANNEL (AIN3)

No Missing Codes

16

Bits min

Guaranteed by design; filter notch < 60 Hz

Output Noise

See

Table 11 to

Table 13

Depends on filter cutoffs and selected gain

Integral Nonlinearity2

±0.003

% of FSR max

Filter notch < 60 Hz; typically ±0.0003%

Unipolar Offset Error9

±10

mV max

Typically within ±1.5 mV

Unipolar Offset Drift

4

μV/°Ctyp

Bipolar Zero Error9

±10

mV max

Typically within ±1.5 mV

Bipolar Zero Drift

4

μV/°C typ

For gains of 1, 2, and 4

1

μV/°C typ

For gains of 8, 16, 32, 64, and 128

Gain Error

±0.2

% typ

Typically within ±0.05%

Gain Drift

0.5

ppm of FSR/°C typ

Negative Full-Scale Error2

±0.0012

% of FSR typ

LOW LEVEL ANALOG INPUTS/REFERENCE INPUTS

Specifications for AIN and REF IN,

unless otherwise noted

Input Common-Mode Rejection (CMR)2

Low level input channels, AIN1 and AIN2

AVDD = 5 V

Gain = 1

100

dB typ

Gain = 2

105

dB typ

Gain = 4

110

dB typ

Gain = 8 to 128

130

dB typ

AVDD = 3 V

Gain = 1

105

dB typ

Gain = 2

110

dB typ

Gain = 4

120

dB typ

Gain = 8 to 128

130

dB typ

Normal-Mode 50 Hz Rejection2

98

dB typ

For filter notches of 10 Hz, 25 Hz, 50 Hz; ±0.02 × fNOTCH

Normal-Mode 60 Hz Rejection2

98

dB typ

For filter notches of 10 Hz, 20 Hz, 60 Hz; ±0.02 × fNOTCH

Common-Mode 50 Hz Rejection2

150

dB typ

For filter notches of 10 Hz, 25 Hz, 50 Hz; ±0.02 × fNOTCH

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