AD7608 Analog Devices, AD7608 Datasheet - Page 5

• Manufacturer Part Number: AD7608
• Description: 8-Channel DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC
• Manufacturer: Analog Devices

Specifications of AD7608

• Resolution (bits): 18bit
• # Chan: 8
• Sample Rate: 200kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: Diff-Bip
• Ain Range: Bip 10V,Bip 5.0V
• Adc Architecture: SAR
• Pkg Type: QFP

Data Sheet
Parameter
ANALOG INPUT
REFERENCE INPUT/OUTPUT
LOGIC INPUTS
LOGIC OUTPUTS
CONVERSION RATE
POWER REQUIREMENTS
1
2
3
4
5
6
7
8
Temperature range for B version is −40°C to +85°C.
See the Terminology section.
This specification applies when reading during a conversion or after a conversion. If reading during a conversion in parallel mode with V
and THD by 3 dB.
LSB means least significant bit. With ±5 V input range, 1 LSB = 38.14 µV. With ±10 V input range, 1 LSB = 76.29 µV.
These specifications include the full temperature range variation and contribution from the internal reference buffer but do not include the error contribution from
the external reference.
Bipolar zero code error is calculated with respect to the analog input voltage.
Sample tested during initial release to ensure compliance.
Operational power/current figure includes contribution when running in oversampling mode.
Power Dissipation
Input Voltage Ranges
Analog Input Current
Input Capacitance
Input Impedance
Reference Input Voltage Range
DC Leakage Current
Input Capacitance
Reference Output Voltage
Reference Temperature Coefficient
Input High Voltage (V
Input Low Voltage (V
Input Current (I
Input Capacitance (C
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
TOTAL
DRIVE
Normal Mode (Static)
Normal Mode (Operational)
Standby Mode
Shutdown Mode
Normal Mode (Static)
Normal Mode (Operational)
Standby Mode
Shutdown Mode
CC
IN
)
7
7
INL
IN
INH
)
7
OL
)
OH
)
)
)
8
8
7
Test Conditions/Comments
RANGE = 1
RANGE = 0
10 V; see Figure 28
5 V; see Figure 28
REF SELECT = 1
REFIN/REFOUT
I
I
All eight channels included; see Table 3
Per channel, all eight channels included
Digital inputs = 0 V or V
f
f
Twos complement
SOURCE
SINK
SAMPLE
SAMPLE
= 100 µA
= 200 kSPS
= 100 µA
= 200 kSPS
Rev. A | Page 5 of 32
DRIVE
Min
2.475
0.9 × V
V
4.75
2.3
DRIVE
− 0.2
DRIVE
DRIVE
Typ
5.4
2.5
5
1
2.5
7.5
2.49/
2.505
±10
5
±1
5
4
1
16
20
5
2
80
100
25
10
= 5 V, SNR typically reduces by 1.5 dB
Max
±10
±5
2.525
±1
0.1 × V
±2
0.2
±20
200
5.25
5.25
22
27
8
11
115.5
142
42
58
DRIVE
AD7608
Unit
V
V
µA
µA
pF
MΩ
V
µA
pF
V
ppm/°C
V
V
µA
pF
V
V
µA
pF
µs
µs
kSPS
V
V
mA
mA
mA
µA
mW
mW
mW
µW