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Data Sheet

AD7321

Rev. B | Page 5 of 36

B Version

Parameter1

Min

Typ

Max

Unit

Test Conditions/Comments

ANALOG INPUT

Input Voltage Ranges

Reference = 2.5 V; see Table 6

(Programmed via Range

±10

VDD = 10 V min, VSS = −10 V min, VCC = 2.7 V to

5.25 V

±5

VDD = 5 V min, VSS = −5 V min, VCC = 2.7 V to 5.25 V

±2.5

VDD = 5 V min, VSS = −5 V min, VCC = 2.7 V to 5.25 V

0 to 10

VDD = 10 V min, VSS = AGND min, VCC = 2.7 V to

5.25 V

Pseudo Differential VIN(−)

Input Range

VDD = 16.5 V, VSS = −16.5 V, VCC = 5 V; see Figure 40

and Figure 41

±3.5

Reference = 2.5 V; range = ±10 V

±6

Reference = 2.5 V; range = ±5 V

±5

Reference = 2.5 V; range = ±2.5 V

+3/−5

Reference = 2.5 V; range = 0 V to +10 V

DC Leakage Current

±80

VIN = VDD or VSS

Per input channel, VIN = VDD or VSS

Input Capacitance3

13.5

When in track, ±10 V range

16.5

When in track, ±5 V and 0 V to +10 V ranges

21.5

When in track, ±2.5 V range

When in hold, all ranges

REFERENCE INPUT/OUTPUT

Input Voltage Range

2.5

Input DC Leakage Current

±1

µA

Input Capacitance

Reference Output Voltage

2.5

Reference Output Voltage

Error at 25°C

±5

Reference Output Voltage

TMIN to TMAX

±10

Reference Temperature

Coefficient

ppm/°C

Reference Output

Impedance

Ω

LOGIC INPUTS

Input High Voltage, VINH

2.4

Input Low Voltage, VINL

0.8

VCC = 4.75 V to 5.25 V

0.4

VCC = 2.7 to 3.6 V

Input Current, IIN

±1

µA

VIN = 0 V or VDRIVE

Input Capacitance, CIN3

LOGIC OUTPUTS

Output High Voltage, VOH

VDRIVE − 0.2 V

ISOURCE = 200 µA

Output Low Voltage, VOL

0.4

ISINK = 200 µA

Floating-State Leakage

Current

±1

µA

Floating-State Output

Capacitance3

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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