Data Sheet
AD7739
Rev. A | Page 3 of 32
SPECIFICATIONS
–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.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
ADC PERFORMANCE, CHOPPING
ENABLED
Conversion Time Rate
372
11840
Hz
Configure via conv. time register
24
Bits
FW ≥ 12 (conversion time ≥ 290 μs)
Output Noise
Resolution
Integral Nonlinearity (IN
L)2±0.0005
±0.0015
% of FSR
±10
μV
Before calibration
Offset Drift vs. Temperatur
e1±25
nV/°C
±0.2
%
Before calibration
Gain Drift vs. Temperatur
e1±2.5
ppm of FS/°C
Positive Full-Scale Er
ror3±0.2
% of FSR
Before calibration
Positive Full-Scale Drift vs. Temp
.1±2.5
ppm of FS/°C
Bipolar Negative Full-Scale Er
ror4±0.0030
% of FSR
After calibration
Common-Mode Rejection
80
95
dB
At dc, AIN = 1 V
Power Supply Rejection
70
80
dB
At dc, AIN = 1 V
ADC PERFORMANCE, CHOPPING
DISABLED
Conversion Time Rate
737
15133
Hz
Configure via conv. time register
24
Bits
FW
12 (conversion time 290 μs)
Output Noise
Resolution
Integral Nonlinearity (IN
L)2±0.0015
% of FSR
±1
mV
Before calibration
Offset Drift vs. Temperature
±1.5
μV/°C
±0.2
%
Before calibration
Gain Drift vs. Temperature
±2.5
ppm of FS/°C
Positive Full-Scale Er
ror3±0.2
% of FSR
Before calibration
Positive Full-Scale Drift vs. Temp.
±2.5
ppm of FS/°C
Bipolar Negative Full-Scale Er
ror4±0.0030
% of FSR
After calibration
Common-Mode Rejection
75
dB
At dc, AIN = 1 V
Power Supply Rejection
65
dB
At dc, AIN = 1 V
ANALOG INPUTS
±2.5 V Range
±2.5
V
2.5 V Range
0 to 2.5
V
±1.25 V Range
±1.25
V
1.25 V Range
0 to 1.25
V
±0.625 V Range
±0.625
V
0.625 V Range
0 to 0.625
V
AIN, AINCOM Common-Mode/
0.2
AVDD 0.3
V
Analog Input Slew Rat
e1, 70.5
V/conv. time
AIN absolute voltage > 3 V
AIN, AINCOM Input Curren
t1, 81
5
nA
Only one channel, chop disabled