AD7451 Analog Devices, AD7451 Datasheet - Page 4

• Manufacturer Part Number: AD7451
• Description: Pseudo Differential Input, 1 MSPS, 12-Bit ADC in an 8-Lead SOT-23
• Manufacturer: Analog Devices

Specifications of AD7451

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: SOP,SOT

AD7441/AD7451
Parameter
CONVERSION RATE
POWER REQUIREMENTS
1
2
3
4
5
6
7
See Terminology section.
Analog inputs with slew rates exceeding 27 V/μs (full-scale input sine wave > 3.5 MHz) within the acquisition time can cause the converter to return an incorrect result.
A small dc input is applied to V
The AD7451 is functional with a reference input in the range of 100 mV to V
Guaranteed by characterization.
See the Power vs. Throughput Rate section.
Measured with a full-scale dc input.
Conversion Time
Track-and-Hold Acquisition Time
Throughput Rate
V
I
Power Dissipation
DD
DD
Normal Mode (Static)
Normal Mode (Operational)
Full Power-Down Mode
Normal Mode (Operational)
Full Power-Down
6, 7
IN–
to provide a pseudo ground for V
1
Test Conditions/Comments
888 ns with an 18 MHz SCLK
Sine wave input
Full-scale step input
SCLK on or off
V
V
SCLK on or off
V
V
V
V
DD
DD
DD
DD
DD
DD
= 4.75 V to 5.25 V
= 2.7 V to 3.6 V
= 5 V; 1.55 mW typical for 100 ksps
= 3 V; 0.6 mW typical for 100 ksps
= 5 V; SCLK on or off
= 3 V; SCLK on or off
IN+
.
Rev. D | Page 4 of 24
DD
.
6
6
A Version
16
250
290
1
2.7/5.25
0.5
1.95
1.45
1
9.25
4
5
3
250
1
2.7/5.25
9.25
B Version
16
290
0.5
1.95
1.45
1
4
5
3
Unit
SCLK cycles
ns max
ns max
MSPS max
V min/max
mA typ
mA max
mA max
μA max
mW max
mW max
μW max
μW max