AD7226BQ datasheet(2/12 Pages) AD

2 / 12 page

REV. A

–2–

AD7226–SPECIFICATIONS

DUAL SUPPLY

Parameter

K, B, T Versions

Units

Conditions/Comments

STATIC PERFORMANCE

Resolution

Bits

Total Unadjusted Error

± 2

LSB max

VDD = +15 V ± 5%, VREF = +10 V

Relative Accuracy

± 1

LSB max

Differential Nonlinearity

± 1

LSB max

Guaranteed Monotonic

Full Scale Error

±1 1/2

LSB max

Full Scale Temperature Coefficient

±20

ppm/

°C typ

VDD = 14 V to 16.5 V, VREF = +10 V

Zero Code Error

±30

mV max

Zero Code Error Temperature Coefficient

±50

µV/°C typ

REFERENCE INPUT

Voltage Range

2 to (VDD – 4)

V min to V max

Input Resistance

Ω min

Input Capacitance

pF min

Occurs when each DAC is loaded with all 0s.

300

pF max

Occurs when each DAC is loaded with all 1s.

DIGITAL INPUTS

Input High Voltage, VINH

2.4

V min

Input Low Voltage, VINL

0.8

V max

Input Leakage Current

± 1

µA max

VIN = 0 V or VDD

Input Capacitance

pF max

Input Coding

Binary

DYNAMIC PERFORMANCE

Voltage Output Slew Rate

2.5

µs min

Voltage Output Settling Time

Positive Full Scale Change

µs max

VREF = +10 V; Settling Time to ± 1/2 LSB

Negative Full Scale Change

µs max

VREF = +10 V; Settling Time to ± 1/2 LSB

Digital Crosstalk

nV secs typ

Minimum Load Resistance

Ω min

VOUT = +10 V

POWER SUPPLIES

VDD Range

11.4/16.5

V min/V max

For Specified Performance

IDD

mA max

Outputs Unloaded; VIN = VINL or VINH

ISS

mA max

Outputs Unloaded; VIN = VINL or VINH

SWITCHING CHARACTERISTICS

4, 5

Address to Write Setup Time, tAS

@ 25

°C

ns min

TMIN to TMAX

ns min

Address to Write Hold Time, tAH

@ 25

°C

ns min

TMIN to TMAX

ns min

Data Valid to Write Setup Time, tDS

@ 25

°C

ns min

TMIN to TMAX

100

ns min

Data Valid to Write Hold Time, tDH

@ 25

°C

ns min

TMIN to TMAX

ns min

Write Pulse Width, tWR

@ 25

°C

150

ns min

TMIN to TMAX

200

ns min

NOTES

1Maximum possible reference voltage.

2Temperature ranges are as follows:

K Version: –40

°C to +85°C

B Version: –40

°C to +85°C

T Version: –55

°C to +125°C

3Guanteed by design. Not production tested.

4Sample Tested at 25

°C to ensure compliance.

5Switching Characteristics apply for single and dual supply operation.

Specifications subject to change without notice.

(VDD = 11.4 V to 16.5 V, VSS = –5 V

10%; AGND = DGND = O V; VREF = +2 V to (VDD – 4 V)

1 unless otherwise noted.

All specifications TMIN to TMAX unless otherwise noted.)

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