AD7928 Analog Devices, AD7928 Datasheet - Page 8

• Manufacturer Part Number: AD7928
• Description: 8-Channel, 1 MSPS, 12-Bit ADC with Sequencer in 20-Lead TSSOP
• Manufacturer: Analog Devices

Specifications of AD7928

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: SOP

AD7908/AD7918/AD7928
Parameter
LOGIC OUTPUTS
CONVERSION RATE
POWER REQUIREMENTS
1
2
3
4
Temperature ranges as follows: B Version: −40°C to +85°C.
See Terminology section.
Sample tested @ 25°C to ensure compliance.
See Power vs. Throughput Rate section.
Output High Voltage, V
Output Low Voltage, V
Floating-State Leakage Current
Floating-State Output Capacitance
Output Coding
Conversion Time
Track-and-Hold Acquisition Time
Throughput Rate
AV
V
I
Power Dissipation
DD
DRIVE
Normal Mode (Static)
Normal Mode (Operational)
Using Auto Shutdown Mode
Full Shutdown Mode
Normal Mode (Operational)
Auto Shutdown Mode (Static)
Full Shutdown Mode
DD
4
4
OL
OH
3
B Version
V
0.4
±1
10
800
300
300
1
2.7/5.25
2.7/5.25
600
2.7
2
960
0.5
0.5
13.5
6
2.5
1.5
2.5
1.5
DRIVE
Straight (natural) binary
− 0.2
Twos complement
1
Rev. D | Page 8 of 32
Unit
V min
V max
μA max
pF max
ns max
ns max
ns max
MSPS max
V min/max
V min/max
μA typ
mA max
mA max
μA typ
μA max
μA max
mW max
mW max
μW max
μW max
μW max
μW max
Test Conditions/Comments
I
I
Coding bit set to 1
Coding bit set to 0
16 SCLK cycles with SCLK at 20 MHz
Sine wave input
Full-scale step input
See Serial Interface section
Digital inputs = 0 V or V
AV
AV
AV
f
(Static)
SCLK on or off (20 nA typ)
AV
AV
AV
AV
AV
AV
SOURCE
SINK
SAMPLE
DD
DD
DD
DD
DD
DD
DD
DD
DD
= 200 μA
= 2.7 V to 5.25 V, SCLK on or off
= 4.75 V to 5.25 V, f
= 2.7 V to 3.6 V, f
= 5 V, f
= 3 V, f
= 5 V
= 3 V
= 5 V
= 3 V
= 200 μA, AV
= 250 kSPS
SCLK
SCLK
= 20 MHz
= 20 MHz
DD
= 2.7 V to 5.25 V
SCLK
DRIVE
SCLK
= 20 MHz
= 20 MHz