AD7795 Analog Devices, AD7795 Datasheet - Page 3

• Manufacturer Part Number: AD7795
• Description: 6-Channel, Low Noise, Low Power, 16-Bit Sigma Delta ADC with On-Chip In-Amp and Reference
• Manufacturer: Analog Devices

Specifications of AD7795

• Resolution (bits): 16bit
• # Chan: 6
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

SPECIFICATIONS
AV
Table 1.
Parameter
CHOP ENABLED
ANALOG INPUTS
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
DD
AD7794
AD7795
Unbuffered Mode
Buffered Mode
In-Amp Active
Common-Mode Voltage, V
Buffered Mode or In-Amp
Active
Unbuffered Mode
Internal Clock
External Clock
= 2.7 V to 5.25 V, DV
Average Input Current
Average Input Current Drift
Average Input Current
Average Input Current Drift
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
AD7794B/AD7795B
AD7794C
1
3
3, 5
2
2, 6
DD
4
2
= 2.7 V to 5.25 V, GND = 0 V, all specifications T
2
CM
4
AD7794/AD7795
4.17 to 470
24
16
±15
±1
±10
±10
±1
±3
100
±VREF/gain
GND − 30 mV
AV
GND + 100 mV
AV
GND + 300 mV
AV
0.5
±1
±250
±1
±3
±2
±3
±2
±400
±50
65
80
90
80
94
90
DD
DD
DD
+ 30 mV
− 100 mV
− 1.1
Rev. D | Page 3 of 36
Unit
Hz nom
Bits min
Bits min
ppm of FSR
max
μV typ
nV/°C typ
μV typ
ppm/°C typ
ppm/°C typ
dB min
V nom
V min
V max
V min
V max
V min
V max
V min
nA max
pA max
nA max
nA max
nA max
nA max
pA/°C typ
nA/V typ
pA/V/°C typ
dB min
dB min
dB min
dB min
dB min
dB min
MIN
to T
Test Conditions/Comments
Settling time = 2/output update rate
f
See the RMS Noise and Resolution Specifications section
See the RMS Noise and Resolution Specifications section
Gain = 1 to 16, external reference
Gain = 32 to 128, external reference
AIN = 1 V/gain, gain ≥ 4, external reference
V
gain = 1 to 128
Gain = 1 or 2
Gain = 1 or 2
Gain = 4 to 128
VCM = (AIN(+) + AIN(−))/2, gain = 4 to 128
Gain = 1 or 2, update rate < 100 Hz
Gain = 4 to 128, update rate < 100 Hz
AIN6(+)/AIN6(−)
Gain = 1 or 2, update rate < 100 Hz
Gain = 4 to 128, update rate < 100 Hz
AIN6(+)/AIN6(−)
Gain = 1 or 2
Input current varies with input voltage
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
ADC
REF
MAX
≤ 242 Hz
= REFIN(+) − REFIN(−), or internal reference,
, unless otherwise noted.
AD7794/AD7795