Datasheet

Data Sheet AD7321
Rev. B | Page 5 of 36
B Version
Parameter
1
Min Typ Max Unit Test Conditions/Comments
ANALOG INPUT
Input Voltage Ranges Reference = 2.5 V; see Table 6
(Programmed via Range
Register)
±10 V
V
DD
= 10 V min, V
SS
= −10 V min, V
CC
= 2.7 V to
5.25 V
±5 V V
DD
= 5 V min, V
SS
= −5 V min, V
CC
= 2.7 V to 5.25 V
±2.5 V V
DD
= 5 V min, V
SS
= −5 V min, V
CC
= 2.7 V to 5.25 V
0 to 10 V
V
DD
= 10 V min, V
SS
= AGND min, V
CC
= 2.7 V to
5.25 V
Pseudo Differential V
IN
(−)
Input Range
V
DD
= 16.5 V, V
SS
= −16.5 V, V
CC
= 5 V; see Figure 40
and Figure 41
±3.5 V Reference = 2.5 V; range = ±10 V
±6 V Reference = 2.5 V; range = ±5 V
±5 V Reference = 2.5 V; range = ±2.5 V
+3/−5 V Reference = 2.5 V; range = 0 V to +10 V
DC Leakage Current
±80
nA
V
IN
= V
DD
or V
SS
3 nA Per input channel, V
IN
= V
DD
or V
SS
Input Capacitance
3
13.5 pF When in track, ±10 V range
16.5 pF When in track, ±5 V and 0 V to +10 V ranges
21.5 pF When in track, ±2.5 V range
3
pF
When in hold, all ranges
REFERENCE INPUT/OUTPUT
Input Voltage Range 2.5 3 V
Input DC Leakage Current
±1
µA
Input Capacitance 10 pF
Reference Output Voltage 2.5 V
Reference Output Voltage
Error at 25°C
±5 mV
Reference Output Voltage
T
MIN
to T
MAX
±10 mV
Reference Temperature
Coefficient
25 ppm/°C
3 ppm/°C
Reference Output
Impedance
7 Ω
LOGIC INPUTS
Input High Voltage, V
INH
2.4 V
Input Low Voltage, V
INL
0.8
V
V
CC
= 4.75 V to 5.25 V
0.4 V V
CC
= 2.7 to 3.6 V
Input Current, I
IN
±1 µA V
IN
= 0 V or V
DRIVE
Input Capacitance, C
IN
3
10 pF
LOGIC OUTPUTS
Output High Voltage, V
OH
V
DRIVE
− 0.2 V V I
SOURCE
= 200 µA
Output Low Voltage, V
OL
0.4 V I
SINK
= 200 µA
Floating-State Leakage
Current
±1 µA
Floating-State Output
Capacitance
3
5 pF
Output Coding Straight natural binary Coding bit set to 1 in control register
Twos complement Coding bit set to 0 in control register
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