AD7732
Rev. A | 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
Hz
Configure via Conv. Time Register
24
Bits
FW ≥ 6 (Conversion Time ≥ 165 μs)
Output Noise
Resolution
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
±13
mV
Before Calibration
±2.5
μV/°C
±0.7
%
Before Calibration
±3.2
ppm of FS/°C
±0.7
% of FSR
Before Calibration
Positive Full-Scale Drift vs.
Temp.1±3
ppm of FS/°C
Bipolar Negative Full-Scale Erro
r5±0.0060
% of FSR
After Calibration
Common-Mode Rejection
50
65
dB
At DC
Power Supply Sensitivity
±4
±10
LSB16
At DC, AIN = 7 V, AVDD = 5 V ± 5%
Channel-to-Channel Isolation
110
dB
At DC, Maximum ±16.5 V AIN Voltage
ADC PERFORMANCE
CHOPPING DISABLED
Conversion Time Rate
737
15437
Hz
Configure via Conv. Time Register
24
Bits
FW ≥ 8 (Conversion Time ≥ 117 μs)
Output Noise
Resolution
Integral Nonlinearity (INL
) 2, 3±0.0015
% of FSR
±10
mV
Before Calibration
Offset Drift vs. Temperature
±25
μV/°C
±0.5
%
Before Calibration
Gain Drift vs. Temperature
±5.3
ppm of FS/°C
±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
55
dB
At DC
Power Supply Sensitivity
±4
LSB16
At DC, AIN = 7 V, AVDD = 5 V ± 5%
Channel-to-Channel Isolation
110
dB
At DC, Maximum ±16.5 V AIN Voltage
ANALOG INPUTS
Analog Input Differential Voltag
e7±10 V Range
±10
V
0 V to +10 V Range
0 to +10
V
±5 V Range
±5
V
0 V to +5 V Range
0 to +5
V
–16.5
+16.5
V
0
2.5
AVDD
V
–10.5
+20
V
100
124
kΩ
87.5
108.5
kΩ
12.5
15.5
k
Ω