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AD7328 Datasheet(PDF) 5 Page - Analog Devices

Part No. AD7328
Description  8-Channel, Software-Selectable True Bipolar Input, 12-Bit Plus Sign ADC
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7328 Datasheet(HTML) 5 Page - Analog Devices

 
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AD7328
Rev. A | Page 5 of 36
B Version
Parameter1
Min
Typ
Max
Unit
Test Conditions/Comments
LOGIC INPUTS
Input High Voltage, VINH
2.4
V
Input Low Voltage, VINL
0.8
V
VCC = 4.75 V to 5.25 V
0.4
V
VCC = 2.7 to 3.6 V
Input Current, IIN
±1
μA
VIN = 0 V or VDRIVE
Input Capacitance, CIN3
10
pF
LOGIC OUTPUTS
Output High Voltage, VOH
VDRIVE
0.2
V
ISOURCE = 200 μA
Output Low Voltage, VOL
0.4
V
ISINK = 200 μA
Floating-State Leakage Current
±1
μA
Floating-State Output
Capacitance3
5
pF
Output Coding
Straight natural binary
Coding bit set to 1 in control register
Twos complement
Coding bit set to 0 in control register
CONVERSION RATE
Conversion Time
800
ns
16 SCLK cycles with SCLK = 20 MHz
Track-and-Hold Acquisition
Time2, 3
305
ns
Full-scale step input; see the Terminology section
Throughput Rate
1
MSPS
See the Serial Interface section; VCC = 4.75 V to 5.25 V
770
kSPS
VCC < 4.75 V
POWER REQUIREMENTS
Digital inputs = 0 V or VDRIVE
VDD
12
16.5
V
See Table 6
VSS
−12
−16.5
V
See Table 6
VCC
2.7
5.25
V
See Table 6; typical specifications for VCC < 4.75 V
VDRIVE
2.7
5.25
V
Normal Mode (Static)
0.9
mA
VDD/VSS = ±16.5 V, VCC/VDRIVE = 5.25 V
Normal Mode (Operational)
fSAMPLE = 1 MSPS
IDD
360
μA
VDD = 16.5 V
ISS
410
μA
VSS = −16.5 V
ICC and IDRIVE
3.2
mA
VCC/VDRIVE = 5.25 V
Autostandby Mode (Dynamic)
fSAMPLE = 250 kSPS
IDD
200
μA
VDD = 16.5 V
ISS
210
μA
VSS = −16.5 V
ICC and IDRIVE
1.3
mA
VCC/VDRIVE = 5.25 V
Autoshutdown Mode (Static)
SCLK on or off
IDD
1
μA
VDD = 16.5 V
ISS
1
μA
VSS = −16.5 V
ICC and IDRIVE
1
μA
VCC/VDRIVE = 5.25 V
Full Shutdown Mode
SCLK on or off
IDD
1
μA
VDD = 16.5 V
ISS
1
μA
VSS = −16.5 V
ICC and IDRIVE
1
μA
VCC/VDRIVE = 5.25 V
POWER DISSIPATION
Normal Mode
30
mW
VDD = 16.5 V, VSS = −16.5 V, VCC = 5.25 V
21
mW
VDD = 12 V, VSS = −12 V, VCC = 5 V
Full Shutdown Mode
38.25
μW
VDD = 16.5 V, VSS = −16.5 V, VCC = 5.25 V
1 Temperature range is −40°C to +85°C.
2 See the Terminology section.
3 Sample tested during initial release to ensure compliance.
4 For dc accuracy specifications, the LSB size for differential mode is FSR/8192. For single-ended mode/pseudo differential mode, the LSB size is FSR/4096, unless otherwise noted.
5 Unipolar 0 V to 10 V range with straight binary output coding.
6 Bipolar range with twos complement output coding.


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