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AD7818ARM-REEL Datenblatt(PDF) 3 Page - Analog Devices

Teilenummer AD7818ARM-REEL
Bauteilbeschribung  Single- and 4-Channel, 9 us, 10-Bit ADCs with On-Chip Temperature Sensor
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Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
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AD7818ARM-REEL Datenblatt(HTML) 3 Page - Analog Devices

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REV. C
AD7816/AD7817/AD7818
–3–
Parameter
A Version
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE (AD7818 Only)
Sample Rate = 100 kSPS, Any Channel,
fIN = 20 kHz
Signal to (Noise + Distortion) Ratio
2
57
dB min
Total Harmonic Distortion
2
–65
dB max
–75 dB typ
Peak Harmonic or Spurious Noise
2
–67
dB typ
–75 dB typ
Intermodulation Distortion
2
fa = 19.9 kHz, fb = 20.1 kHz
Second Order Terms
–67
dB typ
Third Order Terms
–67
dB typ
Channel-to-Channel Isolation
2
–80
dB typ
fIN = 20 kHz
DC ACCURACY (AD7818 Only)
Any Channel
Resolution
10
Bits
Minimum Resolution for Which
No Missing Codes are Guaranteed
10
Bits
Relative Accuracy
2
1
LSB max
Differential Nonlinearity
2
1
LSB max
Gain Error
2
10
LSB max
Offset Error
2
4
LSB max
TEMPERATURE SENSOR
1
Measurement Error
External Reference VREF = 2.5 V
Ambient Temperature 25
°C
2
°C max
TMIN to TMAX
3
°C max
Measurement Error
On-Chip Reference
Ambient Temperature 25
°C
2
°C max
TMIN to TMAX
3
°C max
Temperature Resolution
1/4
°C/LSB
REFERENCE INPUT
3, 4 (AD7816 Only)
REFIN Input Voltage Range
3
2.625
V max
2.5 V + 5%
2.375
V min
2.5 V – 5%
Input Impedance
50
k
Ω min
Input Capacitance
10
pF max
ON-CHIP REFERENCE
5
Nominal 2.5 V
Temperature Coefficient
3
30
ppm/
°C typ
CONVERSION RATE
Track/Hold Acquisition Time
4
400
ns max
Source Impedance < 10
Conversion Time
Temperature Sensor
27
µs max
Channel 1
9
µs max
(AD7818 Only)
POWER REQUIREMENTS
VDD
5.5
V max
For Specified Performance
2.7
V min
IDD
Logic Inputs = 0 V or VDD
Normal Operation
2
mA max
1.3 mA typ
Using External Reference
1.75
mA max
2.5 V External Reference Connected
Power-Down (VDD = 5 V)
10.75
µA max
6
µA typ
Power-Down (VDD = 3 V)
4.5
µA max
2
µA typ
Auto Power-Down Mode
VDD = 3 V
10 SPS Throughput Rate
6.4
µW typ
See Power vs. Throughput Section for
1 kSPS Throughput Rate
48.8
µW typ
Description of Power Dissipation in
10 kSPS Throughput Rate
434
µW typ
Auto Power-Down Mode
Power-Down
13.5
µW max
Typically 6
µW
AD7816/AD7818
6–SPECIFICATIONS1 (VDD=2.7Vto5.5V,GND=0V,REFIN=2.5Vunless
otherwise noted)


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