AD7818_00(2000) Просмотр технического описания (PDF) - Analog Devices
Номер в каталоге
Компоненты Описание
производитель
AD7818_00
(Rev.:2000)
(Rev.:2000)
Analog Devices
AD7818_00 Datasheet PDF : 16 Pages
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AD7816/AD7817/AD7818
AD7817–SPECIFICATIONS1
(VDD = +2.7 V to +5.5 V, GND = 0␣ V, REFIN = +2.5␣ V unless otherwise noted)
Parameter
A Version *B Version *S Version Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
Signal to (Noise + Distortion) Ratio2 58
58
Total Harmonic Distortion2
–65
–65
Peak Harmonic or Spurious Noise2 –65
–65
Intermodulation Distortion2
Second Order Terms
–67
–67
Third Order Terms
–67
–67
Channel-to-Channel Isolation2
–80
–80
DC ACCURACY
Resolution
10
10
Minimum Resolution for Which
No Missing Codes Are Guaranteed 10
10
Relative Accuracy2
Differential Nonlinearity2
Gain Error2
±1
±1
±1
±1
±2
±2
Gain Error Match2
Offset Error2
±10
±10
±1/2
±1/2
±2
±2
Offset Error Match
±1/2
±1/2
58
–65
–65
–67
–67
–80
10
10
±1
±1
±2
+20/–10
± 1/2
±2
± 1/2
dB min
dB max
dB max
dB typ
dB typ
dB typ
Bits
Sample Rate = 100 kSPS, Any
Channel, fIN = 20 kHz
–75 dB typ
–75 dB typ
fa =19.9␣ kHz, fb = 20.1␣ kHz
fIN = 20 kHz
Any Channel
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
External Reference
Internal Reference
TEMPERATURE SENSOR1
Measurement Error
Ambient Temperature +25°C
TMIN to TMAX
Measurement Error
Ambient Temperature +25°C
TMIN to TMAX
Temperature Resolution
±2
±3
±2.25
±3
1/4
±1
±2
±2.25
±3
1/4
±2
±3
± 2.25
±6
1/4
°C max
°C max
°C max
°C max
°C/LSB
External Reference VREF = 2.5 V
On-Chip Reference
REFERENCE INPUT3, 4
REFIN Input Voltage Range3
Input Impedance
Input Capacitance
ON-CHIP REFERENCE5
Temperature Coefficient3
2.625
2.375
40
10
80
2.625
2.375
40
10
80
2.625
2.375
40
10
150
V max
V min
kΩ min
pF max
2.5 V + 5%
2.5 V – 5%
Nominal 2.5 V
ppm/°C typ
CONVERSION RATE
Track/Hold Acquisition Time4
400
400
Conversion Time
Temperature Sensor
27
27
Channels 1 to 4
9
9
400
ns max
Source Impedance < 10 Ω
27
µs max
9
µs max
POWER REQUIREMENTS
VDD
IDD
Normal Operation
Using External Reference
Power-Down
Auto Power-Down Mode
10 SPS Throughput Rate
1 kSPS Throughput Rate
10 kSPS Throughput Rate
Power-Down
+5.5
+5.5
+2.7
+2.7
2
2
1.75
1.75
1
1
6
6
60
60
600
600
3
3
+5.5
V max
For Specified Performance
+2.7
V min
Logic Inputs = 0 V or VDD
2
mA max 1.6 mA typ
1.75
mA max 2.5 V External Reference Connected
2
µA max 50 nA typ
VDD = 3 V
6
µW typ See Power vs. Throughput Section
60
µW typ for Description of Power Dissipation
600
µW typ in Auto Power-Down Mode
6
µW max Typically 0.15 µW
–2–
REV. A
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