AD7478 Analog Devices, AD7478 Datasheet - Page 4

• Manufacturer Part Number: AD7478
• Description: 8-Bit, 1 MSPS, Low Power Successive Approximation ADC Which Operates From A Single 2.35 V to 5.25 V Power Supply
• Manufacturer: Analog Devices

Specifications of AD7478

• Resolution (bits): 8bit
• # Chan: 1
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOT

AD7476/AD7477/AD7478
Parameter
CONVERSION RATE
POWER REQUIREMENTS
1
2
3
4
5
6
7
Temperature range for A and B versions is −40°C to +85°C; temperature range for S version is −55°C to +125°C.
Operational from V
See the Terminology section.
Maximum B and S version specifications apply as typical figures when V
Guaranteed by characterization.
For A version: f
See the Power vs. Throughput Rate section.
Full Power-Down Mode
Conversion Time
Track-and-Hold Acquisition Time
Throughput Rate
V
I
Power Dissipation
DD
DD
Normal Mode (Static)
Normal Mode (Operational)
Normal Mode (Operational)
Full Power-Down
SAMPLE
DD
MAX = 1 MSPS; B and S versions: f
= 2.0 V.
7
A Version
2.35/5.25
2
1
3.5
1.6
1
80
17.5
4.8
5
3
0.8
500
350
1000
SAMPLE
MAX = 600 kSPS.
1,2
B Version
1.33
500
400
600
2.35/5.25
2
1
3
1.4
1
80
15
4.2
5
3
DD
Rev. F | Page 4 of 24
= 5.25 V.
1,2
S Version
1.33
500
400
600
2.35/5.25
2
1
3
1.4
1
80
15
4.2
5
3
1,2
Unit
V min/max
mA typ
mA typ
mA max
mA max
μA max
μA max
mW max
mW max
μW max
μW max
μs max
ns max
ns max
kSPS max
Test Conditions/Comments
16 SCLK cycles
Full-scale step input
Sine wave input ≤ 100 kHz
See Serial Interface section
Digital I/Ps = 0 V or V
V
V
V
V
SCLK off
SCLK on
V
V
V
V
DD
DD
DD
DD
DD
DD
DD
DD
f
f
SAMPLE
SAMPLE
= 4.75 V to 5.25 V, SCLK on or off
= 2.35 V to 3.6 V, SCLK on or off
= 4.75 V to 5.25 V,
= 2.35 V to 3.6 V,
= 5 V, f
= 3 V, f
= 5 V, SCLK off
= 3 V, SCLK off
= f
= f
SAMPLE
SAMPLE
SAMPLE
SAMPLE
MAX
MAX
= f
= f
SAMPLE
SAMPLE
DD
6
6
MAX
MAX
6
6