AD7631(2011) View Datasheet(PDF) - Analog Devices
Part Name
Description
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AD7631 Datasheet PDF : 32 Pages
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AD7631
Parameter
INTERNAL REFERENCE
Output Voltage
Temperature Drift
Line Regulation
Long-Term Drift
Turn-On Settling Time
REFERENCE BUFFER
REFBUFIN Input Voltage Range
EXTERNAL REFERENCE
Voltage Range
Current Drain
TEMPERATURE PIN
Voltage Output
Temperature Sensitivity
Output Resistance
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
IIH
DIGITAL OUTPUTS
Data Format
Pipeline Delay5
VOL
VOH
POWER SUPPLIES
Specified Performance
AVDD
DVDD
OVDD
VCC
VEE
Operating Current7
AVDD
With Internal Reference8
With Internal Reference Disabled8
DVDD
OVDD
VCC
VEE
Power Dissipation
With Internal Reference8
With Internal Reference Disabled8
In Power-Down Mode9
TEMPERATURE RANGE10
Specified Performance
Conditions/Comments
PDREF = PDBUF = low
REF @ 25°C
–40°C to +85°C
AVDD = 5 V ± 5%
1000 hours
CREF = 22 μF
PDREF = high
PDREF = PDBUF = high
REF
250 kSPS throughput
@ 25°C
Parallel or serial 18-bit
ISINK = 500 μA
ISOURCE = −500 μA
@ 250 kSPS throughput
VCC = 15 V, with internal reference buffer
VCC = 15 V
VEE = −15 V
@ 250 kSPS throughput
PD = high
TMIN to TMAX
Min
4.965
2.4
4.75
−0.3
2.1
−1
−1
Typ Max
5.000
±3
±15
50
10
5.035
2.5 2.6
5
AVDD + 0.1
250
311
1
4.33
+0.6
OVDD + 0.3
+1
+1
0.4
OVDD − 0.6
4.756
4.75
2.7
7
−15.75
5
5.25
5
5.25
5.25
15
15.75
−15 0
8.5
6.1
4
0.1
1.4
0.8
0.7
94
120
73
100
10
−40
+85
1 In all input ranges, the input current scales with throughput. See the Analog Inputs section.
2 Linearity is tested using endpoints, not best fit. All linearity is tested with an external 5 V reference.
3 LSB means least significant bit. All specifications in LSB do not include the error contributed by the reference.
4 All specifications in decibels are referred to a full-scale range input, FSR. Tested with an input signal at 0.5 dB below full-scale, unless otherwise specified.
5 Conversion results are available immediately after completed conversion.
6 4.75 V or VREF − 0.1 V, whichever is larger.
7 Tested in parallel reading mode.
8 With internal reference, PDREF = PDBUF = low; with internal reference disabled, PDREF = PDBUF = high. With internal reference buffer, PDBUF = low.
9 With all digital inputs forced to OVDD.
10 Consult sales for extended temperature range.
Unit
V
ppm/°C
ppm/V
ppm
ms
V
V
μA
mV
mV/°C
kΩ
V
V
μA
μA
V
V
V
V
V
V
V
mA
mA
mA
mA
mA
mA
mA
mW
mW
μW
°C
Rev. A | Page 4 of 32
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