AD7890 Analog Devices, AD7890 Datasheet - Page 4

• Manufacturer Part Number: AD7890
• Description: LC2MOS 8-Channel, 12-Bit Serial Data Acquisition System
• Manufacturer: Analog Devices

Specifications of AD7890

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 117kSPS
• Interface: Ser
• Analog Input Type: SE-Bip,SE-Uni
• Ain Range: Bip 10V,Uni 2.5V,Uni 4.096V
• Adc Architecture: SAR
• Pkg Type: DIP,SOIC

AD7890
Parameter
LOGIC INPUTS
LOGIC OUTPUTS
CONVERSION RATE
POWER REQUIREMENTS
1
2
3
4
5
6
Temperature ranges are as follows: A, B Versions: −40°C to +85°C; S Version: −55°C to +125°C.
See the Terminology section.
This sample rate is only achievable when using the part in external clocking mode.
Full-scale error match applies to positive full scale for the AD7890-2 and AD7890-4. It applies to both positive and negative full scale for the AD7890-10.
Sample tested @ 25°C to ensure compliance.
Analog inputs on AD7890-10 must be at 0 V to achieve correct power-down current.
Input High Voltage, V
Input Low Voltage, V
Input Current, I
Input Capacitance, C
Output High Voltage, V
Output Low Voltage, V
Serial Data Output Coding
Conversion Time
Track/Hold Acquisition Time
V
I
I
Power Dissipation
DD
DD
DD
AD7890-10
AD7890-4
AD7890-2
Normal Mode
Standby Mode @ 25°C
(Normal Mode)
(Standby Mode)
IN
6
IN
@ 25°C
INL
INH
5
OL
OH
2
,
5
A Versions
2.4
0.8
±10
10
4.0
0.4
5.9
2
5
10
15
50
75
Straight (Natural) Binary
Straight (Natural) Binary
1
Twos Complement
B Versions
2.4
0.8
±10
10
4.0
0.4
5.9
2
5
10
15
50
75
Rev. C | Page 4 of 28
S Version
2.4
0.8
±10
10
4.0
0.4
5.9
2
5
10
15
50
75
μA max
pF max
V nom
μA typ
Unit
V min
V max
V min
V max
μs max
μs max
mA max
mW max
μW typ
Test Conditions/Comments
V
V
V
I
I
f
SHA IN
± 5% for specified performance
Logic inputs = 0 V or V
Logic inputs = 0 V or V
Typically 30 mW
SOURCE
SINK
CLK IN
DD
DD
IN
= 0 V to V
= 5 V ± 5%
= 5 V ± 5%
= 1.6 mA
= 2.5 MHz, MUX OUT, connected to
= 200 μA
DD
DD
DD