Datasheet

Data Sheet AD7608
Rev. A | Page 5 of 32
Parameter Test Conditions/Comments Min Typ Max Unit
ANALOG INPUT
Input Voltage Ranges RANGE = 1 ±10 V
RANGE = 0 ±5 V
Analog Input Current 10 V; see Figure 28 5.4 µA
5 V; see Figure 28
2.5
µA
Input Capacitance
7
5 pF
Input Impedance 1 MΩ
REFERENCE INPUT/OUTPUT
Reference Input Voltage Range 2.475 2.5 2.525 V
DC Leakage Current ±1 µA
Input Capacitance
7
REF SELECT = 1 7.5 pF
Reference Output Voltage REFIN/REFOUT
2.49/
2.505
V
Reference Temperature Coefficient ±10 ppm/°C
LOGIC INPUTS
Input High Voltage (V
INH
) 0.9 × V
DRIVE
V
Input Low Voltage (V
INL
) 0.1 × V
DRIVE
V
Input Current (I
IN
) ±2 µA
Input Capacitance (C
IN
)
7
5 pF
LOGIC OUTPUTS
Output High Voltage (V
OH
) I
SOURCE
= 100 µA V
DRIVE
− 0.2 V
Output Low Voltage (V
OL
) I
SINK
= 100 µA 0.2 V
Floating-State Leakage Current ±1 ±20 µA
Floating-State Output Capacitance
7
5 pF
Output Coding
Twos complement
CONVERSION RATE
Conversion Time All eight channels included; see Table 3 4 µs
Track-and-Hold Acquisition Time
1
µs
Throughput Rate Per channel, all eight channels included 200 kSPS
POWER REQUIREMENTS
AV
CC
4.75 5.25 V
V
DRIVE
2.3 5.25 V
I
TOTAL
Digital inputs = 0 V or V
DRIVE
Normal Mode (Static) 16 22 mA
Normal Mode (Operational)
8
f
SAMPLE
= 200 kSPS 20 27 mA
Standby Mode
5
8
mA
Shutdown Mode 2 11 µA
Power Dissipation
Normal Mode (Static) 80 115.5 mW
Normal Mode (Operational)
8
f
SAMPLE
= 200 kSPS 100 142 mW
Standby Mode 25 42 mW
Shutdown Mode
10
58
µW
1
Temperature range for B version is −40°C to +85°C.
2
See the Terminology section.
3
This specification applies when reading during a conversion or after a conversion. If reading during a conversion in parallel mode with V
DRIVE
= 5 V, SNR typically reduces by 1.5 dB
and THD by 3 dB.
4
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.
5
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.
6
Bipolar zero code error is calculated with respect to the analog input voltage.
7
Sample tested during initial release to ensure compliance.
8
Operational power/current figure includes contribution when running in oversampling mode.