REV. C
2
AD7816/AD7817/AD7818
Parameter
A Version  *B Version  *S Version  Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
Sample Rate = 100 kSPS, Any
Channel, f
IN
 = 20 kHz
Signal to (Noise + Distortion) Ratio
2
58
58
58
dB min
Total Harmonic Distortion
2
65
65
65
dB max
75 dB typ
Peak Harmonic or Spurious Noise
2
65
65
65
dB max
75 dB typ
Intermodulation Distortion
2
fa =19.9 kHz, fb = 20.1 kHz
Second Order Terms
67
67
67
dB typ
Third Order Terms
67
67
67
dB typ
Channel-to-Channel Isolation
2
80
80
80
dB typ
f
IN
 = 20 kHz
DC ACCURACY
Any Channel
Resolution
10
10
10
Bits
Minimum Resolution for Which
No Missing Codes are Guaranteed  10
10
10
Bits
Relative Accuracy
2
1
1
1
LSB max
Differential Nonlinearity
2
1
1
1
LSB max
Gain Error
2
2
2
2
LSB max    External Reference
10
10
+20/10
LSB max    Internal Reference
Gain Error Match
2
1/2
1/2
1/2
LSB max
Offset Error
2
2
2
2
LSB max
Offset Error Match
1/2
1/2
1/2
LSB max
TEMPERATURE SENSOR
1
Measurement Error
External Reference V
REF
 = 2.5 V
Ambient Temperature 25癈
2
1
2
癈 max
T
MIN
 to T
MAX
3
2
3
癈 max
Measurement Error
On-Chip Reference
Ambient Temperature 25癈
2.25
2.25
2.25
癈 max
T
MIN
 to T
MAX
3
3
6
癈 max
Temperature Resolution
1/4
1/4
1/4
癈/LSB
 REFERENCE INPUT
3, 4
REF
IN
 Input Voltage Range
3
2.625
2.625
2.625
V max
2.5 V + 5%
2.375
2.375
2.375
V min
2.5 V  5%
Input Impedance
40
40
40
k& min
Input Capacitance
10
10
10
pF max
ON-CHIP REFERENCE
5
Nominal 2.5 V
Temperature Coefficient
3
80
80
150
ppm/癈 typ
CONVERSION RATE
Track/Hold Acquisition Time
4
400
400
400
ns max
Source Impedance < 10 &
Conversion Time
Temperature Sensor
27
27
27
祍 max
Channels 1 to 4
9
9
9
祍 max
POWER REQUIREMENTS
V
DD
5.5
5.5
5.5
V max
For Specified Performance
2.7
2.7
2.7
V min
I
DD
Logic Inputs = 0 V or V
DD
Normal Operation
2
2
2
mA max
1.6 mA typ
Using External Reference
1.75
1.75
1.75
mA max
2.5 V External Reference Connected
Power-Down (V
DD
 = 5 V)
10
10
12.5
礎 max
5.5 礎 typ
Power-Down (V
DD
 = 3 V)
4
4
4.5
礎 max
2 礎 typ
Auto Power-Down Mode
V
DD
 = 3 V
10 SPS Throughput Rate
6.4
6.4
6.4
礧 typ
See Power vs. Throughput Section for
1 kSPS Throughput Rate
48.8
48.8
48.8
礧 typ
Description of Power Dissipation in
10 kSPS Throughput Rate
434
434
434
礧 typ
Auto Power-Down Mode
Power-Down
12
12
13.5
礧 max
Typically 6 礧
AD7817SPECIFICATIONS
1
(V
DD
 = 2.7 V to 5.5 V, GND = 0 V, REF
IN
 = 2.5 V unless otherwise noted)
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