AD7195 Analog Devices, AD7195 Datasheet - Page 4

• Manufacturer Part Number: AD7195
• Description: 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
• Manufacturer: Analog Devices

Specifications of AD7195

• Resolution (bits): 24bit
• # Chan: 4
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Bip,SE-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

AD7195
Parameter
ANALOG INPUTS
REFERENCE INPUT
TEMPERATURE SENSOR
BRIDGE POWER-DOWN SWITCH
BURNOUT CURRENTS
DIGITAL OUTPUTS (ACXx, ACXx )
INTERNAL/EXTERNAL CLOCK
Differential Input Voltage
Absolute AIN Voltage Limits
Analog Input Current
REFIN Voltage
Absolute REFIN Voltage
Average Reference Input
Normal Mode Rejection
Common-Mode Rejection
Accuracy
Sensitivity
R
Allowable Current
AIN Current
Output High Voltage, V
Output Low Voltage, V
Internal Clock
External Clock/Crystal
Average Reference Input
Reference Detect Levels
ON
Ranges
Unbuffered Mode
Buffered Mode
Buffered Mode
Unbuffered Mode
Limits
Current
Frequency
Duty Cycle
Frequency
Input Low Voltage V
Input High Voltage, V
Input Current
Current Drift
External Clock
Input Current
Input Current Drift
Input Current
Input Current Drift
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
2
2
2
2
OL
INL
OH
2
INH
2
2
2
100
AGND − 0.05
AGND + 0.25
0.3
4.72
2.4576
−10
Min
67
95
95
−(AV
1.25 V)/gain
−2
−4.5
1
GND − 0.05
4
2.5
3.5
DD
−
±5
2815
50:50
4.9152
Typ
±V
±5
±1
±0.05
±1.6
AV
7
±0.03
±1.3
95
±2
500
Same as for
analog inputs
REF
DD
/gain
+(AV
1.25 V)/gain
Max
AV
AV
+2
+4.5
AV
AV
0.6
10
30
0.4
5.12
5.12
0.8
0.4
+10
DD
DD
DD
DD
Rev. 0 | Page 4 of 44
DD
− 0.25
+ 0.05
+ 0.05
−
Unit
dB
dB
dB
dB
V
V
V
V
nA
nA
pA/°C
μA/V
μA/V
nA/V/°C
nA/V/°C
V
V
μA/V
nA/V/°C
nA/V/°C
dB
V
°C
Codes/°C
Ω
mA
nA
V
V
MHz
%
MHz
V
V
V
V
μA
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
50 Hz output data rate, REJ60
50 Hz output data rate, 50 ± 1 Hz
60 Hz output data rate, 60 ± 1 Hz
VREF = REFIN(+) − REFIN(−), gain = 1 to 128
Gain > 1
Gain = 1
Gain = 1, input current varies with input voltage
Gain > 1
Internal clock
REFIN = REFIN(+) − REFIN(−). The differential input must
be limited to ±(AV
Internal clock
Applies after user calibration at 25°C
Bipolar mode
Continuous current
Analog inputs must be buffered and chop disabled
AV
AV
DV
Test Conditions/Comments
Gain > 1
External clock
External clock
DV
DV
DV
DD
DD
DD
DD
DD
DD
= 5 V, I
= 5 V, I
= 5 V
= 3 V
= 3 V
= 5 V
SOURCE
SINK
= 800 μA
DD
= 200 μA
− 1.25 V)/gain when gain > 1
1
6
= 1, 50 ± 1 Hz, 60 ± 1 Hz