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AD7450 Datasheet(PDF) 3 Page - Analog Devices

Part # AD7450
Description  Differential Input, 1 MSPS 12-Bit ADC in SOIC-8 and SO-8
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7450 Datasheet(HTML) 3 Page - Analog Devices

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AD7450
–3–
Parameter
Conditions/Comments
A Version
B Version
Unit
CONVERSION RATE
Conversion Time
888 ns with an 18 MHz SCLK
16
16
SCLK Cycles
1.07
µs with a 15 MHz SCLK
Track-and-Hold
Sine Wave Input
200
200
ns max
Acquisition Time
3, 8
Throughput Rate
9
VDD = 5 V
1
1
MSPS max
VDD = 3 V
833
833
kSPS max
POWER REQUIREMENTS
VDD
Range: 3 V
± 10%; 5 V ± 5%
3/5
3/5
V min/max
IDD
10, 11
Normal Mode (Static)
VDD = 3 V/5 V SCLK; ON or OFF
0.5
0.5
mA typ
Normal Mode (Operational)
VDD = 5 V; fSAMPLE = 1 MSPS
1.8
1.8
mA max
VDD = 3 V; fSAMPLE = 833 kSPS
1.25
1.25
mA max
Full Power-Down Mode
SCLK ON or OFF
1
1
µA max
Power Dissipation
Normal Mode (Operational)
VDD = 5 V; fSAMPLE = 1 MSPS;
9
9
mW max
1.38 mW typ for 100 KSPS
10
VDD = 3 V; fSAMPLE = 833 kSPS;
3.75
3.75
mW max
0.53 mW typ for 100 KSPS
10
Full Power-Down Mode
VDD = 5 V; SCLK ON or OFF
5
5
µW max
VDD = 3 V; SCLK ON or OFF
3
3
µW max
NOTES
1Temperature range is as follows: A and B Versions: –40
°C to +85°C.
2Common-mode voltage. The input signal can be centered on any choice of dc common-mode voltage as long as this value is in the range specified in Figures 8 and 9.
3See Terminology section.
4A 200 mV p-p sine wave, varying in frequency from 1 kHz to 200 kHz is coupled onto V
DD. A 2.2 nF capacitor is used to decouple VDD to GND.
5If the input spans of V
IN+ and VIN– are both VREF, and they are 180
° out of phase, the differential voltage is 2
VREF.
6The AD7450 is functional with a reference input from 100 mV and for V
DD = 5 V, the reference can range up to 3.5 V (see References section).
7The AD7450 is functional with a reference input from 100 mV and for V
DD = 3 V, the reference can range up to 2.2 V (see References section).
8Sample tested @ 25
°C to ensure compliance.
9See Serial Interface section.
10See Power Versus Throughput Rate section.
11Measured with a midscale dc input.
Rev. A


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   Differential Input, 1 MSPS 12-Bit ADC
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