AD7795 Analog Devices, AD7795 Datasheet - Page 5

• 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

Parameter
CHOP ENABLED or DISABLED
REFERENCE INPUT
EXCITATION CURRENT SOURCES
(IEXC1 and IEXC2)
Normal Mode Rejection
Internal Reference
External Reference
Output Current
Initial Tolerance at 25°C
Drift
Current Matching
Drift Matching
Line Regulation (AV
Load Regulation
Output Compliance
Internal Clock
External Clock
Common-Mode Rejection
Internal Reference Initial
Accuracy
Internal Reference Drift
Power Supply Rejection
External REFIN Voltage
Reference Voltage Range
Absolute REFIN Voltage Limits
Average Reference Input
Current
Average Reference Input
Normal Mode Rejection
Common-Mode Rejection
Reference Detect Levels
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
AD7794B/AD7795B
AD7794C
Current Drift
@ DC
@ 50 Hz, 60 Hz
@ 50 Hz, 60 Hz
@ DC
@ 50 Hz, 60 Hz
@ 50 Hz, 60 Hz
1
DD
)
2
2
2
2
2, 6
2
2
2
2
AD7794/AD7795
60
78
86
60
94
90
100
100
100
97
97
97
1.17 ± 0.01%
4
15
85
2.5
0.1
AV
GND − 30 mV
AV
400
±0.03
100
0.3
0.65
10/210/1000
±5
200
±0.5
50
2
0.2
AV
AV
GND − 30 mV
DD
DD
DD
DD
+ 30 mV
− 0.65
− 1.1
Rev. D | Page 5 of 36
Unit
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
V min/max
ppm/°C typ
ppm/°C max
dB typ
V nom
V min
V max
V min
V max
nA/V typ
nA/V/°C typ
dB typ
V min
V max
μA nom
% typ
ppm/°C typ
% typ
ppm/°C typ
%/V typ
%/V typ
V max
V max
V min
Test Conditions/Comments
70 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
70 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 = 1 V/gain, with gain = 4, AMP-CM Bit = 1
50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
50 ± 1 Hz, FS[3:0] = 1001; 60 ± 1 Hz, FS[3:0] = 1000
AIN = 1 V/gain, with gain = 4, AMP-CM Bit = 1
50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
50 ± 1 Hz, FS[3:0] = 1001; 60 ± 1 Hz, FS[3:0] = 1000
AV
REFIN = REFIN(+) − REFIN(−)
When V
limited to 0.9 × V
Same as for analog inputs
NOXREF bit active if V
Matching between IEXC1 and IEXC2, V
AV
Current sources programmed to 10 μA or 210 μA
Current sources programmed to 1 mA
DD
DD
= 4 V, T
= 5 V ± 5%
REF
= AV
A
= 25°C
DD
REF
, the differential input must be
/gain if the in-amp is active
REF
< 0.3 V
AD7794/AD7795
OUT
= 0 V