AD7634 Analog Devices, AD7634 Datasheet - Page 4

• Manufacturer Part Number: AD7634
• Manufacturer: Analog Devices

Specifications of AD7634

• Resolution (bits): 18bit
• # Chan: 1
• Sample Rate: 670kSPS
• Interface: Byte,Par,Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni
• Ain Range: 10V p-p,20 V p-p,40 V p-p
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7634
Parameter
INTERNAL REFERENCE
REFERENCE BUFFER
EXTERNAL REFERENCE
TEMPERATURE PIN
DIGITAL INPUTS
DIGITAL OUTPUTS
POWER SUPPLIES
TEMPERATURE RANGE
1
2
3
4
5
6
7
8
9
10
With V
Linearity is tested using endpoints, not best fit. All linearity is tested with an external 5 V reference.
LSB means least significant bit. All specifications in LSB do not include the error contributed by the reference.
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.
Conversion results are available immediately after completed conversion.
4.75 V or V
Tested in parallel reading mode.
With internal reference, PDREF = PDBUF = low; with internal reference disabled, PDREF = PDBUF = high. With internal reference buffer, PDBUF = low.
With all digital inputs forced to OVDD.
Consult sales for extended temperature range.
Logic Levels
Data Format
Pipeline Delay
Specified Performance
Operating Current
Power Dissipation
In Power-Down Mode
Specified Performance
Output Voltage
Temperature Drift
Line Regulation
Long-Term Drift
Turn-On Settling Time
REFBUFIN Input Voltage Range
Voltage Range
Current Drain
Voltage Output
Temperature Sensitivity
Output Resistance
V
V
I
I
With Internal Reference
With Internal Reference Disabled
V
V
AVDD
DVDD
OVDD
VCC
VEE
AVDD
With Internal Reference
With Internal Reference Disabled
DVDD
OVDD
VCC
VEE
IL
IH
IN
IL
IH
OL
OH
=
unipolar 5 V
REF
– 0.1 V, whichever is larger.
5
7 , 8
10
or unipolar 10 V ranges, the input current is typically 70 μA. In all input ranges, the input current scales with throughput. See the Analog Inputs section.
9
Conditions/Comments
PDREF = PDBUF = low
REF @ 25°C
−40°C to +85°C
AVDD = 5 V ± 5%
1000 hours
C
PDREF = high
PDREF = PDBUF = high
REF
670 kSPS throughput
@ 25°C
Parallel or serial 18-bit
I
I
@ 670 kSPS throughput
VCC = 15 V, with internal reference buffer
VCC = 15 V
VEE = −15 V
@ 670 kSPS throughput
PDREF = PDBUF = low
PDREF = PDBUF = high
PD = high
T
SINK
SOURCE
MIN
REF
= 500 μA
= 22 μF
to T
= –500 μA
MAX
Rev. A | Page 4 of 32
4.965
2.4
4.75
−0.3
2.1
−1
−1
OVDD − 0.6
4.75
4.75
2.7
7
−15.75
−40
Min
6
Typ
5.000
±3
±15
50
10
2.5
5
250
311
1
4.33
5
5
15
−15
18.2
16.5
7.1
0.3
2.9
2
2
195
175
10
Max
5.035
2.6
AVDD + 0.1
+0.6
OVDD + 0.3
+1
+1
0.4
5.25
5.25
5.25
15.75
0
225
205
+85
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