AD7796 Analog Devices, AD7796 Datasheet - Page 3

• Manufacturer Part Number: AD7796
• Description: Low Power 16-Bit Sigma-Delta A/D Converter for Bridge Sensors
• Manufacturer: Analog Devices

Specifications of AD7796

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni
• Ain Range: ± (Vref/128)
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

SPECIFICATIONS
AV
Table 1.
Parameter
ADC CHANNEL
ANALOG INPUTS
REFERENCE
TEMPERATURE SENSOR
Output Update Rate
No Missing Codes
Resolution
RMS Noise and Update Rates
Integral Nonlinearity
Offset Error
Offset Error Drift vs. Temperature
Full-Scale Error
Gain Drift vs. Temperature
Power Supply Rejection
Differential Input Voltage Ranges
Absolute AIN Voltage Limits
Analog Input Current
Normal Mode Rejection
External REFIN Voltage
Reference Voltage Range
Absolute REFIN Voltage Limits
Average Reference Input Current
Average Reference Input Current Drift
Normal Mode Rejection
Common-Mode Rejection
Accuracy
Sensitivity
DD
Common-Mode Voltage, V
Internal Clock
External Clock
Average Input Current
Average Input Current Drift
Common-Mode Rejection
= 2.7 V to 5.25 V, DV
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
@ DC
@ 50 Hz, 60 Hz
@ 50 Hz, 60 Hz
3, 4
3, 4, 5
2
2
2
2
2
2
DD
4
2
= 2.7 V to 5.25 V, GND = 0 V, all specifications T
CM
2
4
AD7796B/AD7797B
4.17 to 123
24
16
See Table 7 and Table 8
See Table 6
±10
±1
±10
±10
±3
90
±V
GND + 300 mV
AV
0.5
±250
±2
65
80
90
80
94
90
90
90
90
2.5
0.1
AV
GND − 30 mV
AV
400
±0.03
Same as for analog inputs
100
±2
0.81
DD
DD
DD
REF
/128
+ 30 mV
− 1.1
Rev. A | Page 3 of 24
1
Unit
Bits min
Bits min
ppm of FSR typ
μV typ
nV/°C typ
μV typ
ppm/°C typ
dB min
V nom
V min
V max
V min
pA max
pA/°C typ
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
V nom
V min
V max
V min
V max
nA/V typ
nA/V/°C typ
dB typ
°C typ
mV/°C typ
Hz nom
MIN
to T
MAX
Test Conditions/Comments
AD7797 only
AD7796 only
AIN = 1 V/128
V
V
Update rate < 100 Hz
80 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
90 dB typ, 50 ± 1 Hz, FS[3:0] = 1001
100 dB typ, 60 ± 1 Hz, FS[3:0] = 1000
90 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
100 dB typ, 50 ± 1 Hz, FS[3:0] = 1001
100 dB typ, 60 ± 1 Hz, FS[3:0] = 1000
AIN = 7.81 mV
50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
50 ± 1 Hz (FS[3:0] = 1001
FS[3:0] = 1000
Applies if user calibrates the temperature sensor
, unless otherwise noted.
REFIN = REFIN(+) – REFIN(–)
REF
CM
= (AIN(+) + AIN(–))/2
= REFIN(+) – REFIN(–)
6
AD7796/AD7797
6
), 60 ± 1 Hz,
6
6
6
6
6
6
6