Datasheet

REV.–2–
AD7226–SPECIFICATIONS
(V
DD
= 11.4 V to 16.5 V, V
SS
= –5 V  10%, AGND = DGND = 0 V; V
REF
= +2 V to (V
DD
– 4 V)
1
,
unless otherwise noted. All Specifications T
MIN
to T
MAX
unless otherwise noted.)
DUAL SUPPLY
Parameter K, B Versions
2
Unit Conditions/Comments
STATIC PERFORMANCE
Resolution 8 Bits
Total Unadjusted Error ± 1LSB maxV
DD
= 15 V ± 5%, V
REF
= 10 V
Relative Accuracy ± 0.5 LSB max
Differential Nonlinearity ± 1LSB max Guaranteed Monotonic
Full-Scale Error ± 0.5 LSB max
Full-Scale Temperature Coefficient ± 20 ppm/∞C typ V
DD
= 14 V to 16.5 V, V
REF
= +10 V
Zero Code Error ± 20 mV max
Zero Code Error Temperature Coefficient ± 50 mV/∞C typ
REFERENCE INPUT
Voltage Range 2 to (V
DD
– 4) V min to V max
Input Resistance 2 kW min
Input Capacitance
3
50 pF min Occurs when each DAC is loaded with all 0s.
200 pF max Occurs when each DAC is loaded with all 1s.
DIGITAL INPUTS
Input High Voltage, V
INH
2.4 V min
Input Low Voltage, V
INL
0.8 V max
Input Leakage Current ± 1 mA max V
IN
= 0 V or V
DD
Input Capacitance 8 pF max
Input Coding Binary
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
4
2.5 V/ms min
Voltage Output Settling Time
4
4 ms max V
REF
= 10 V; Settling Time to ± 1/2 LSB
Digital Crosstalk 10 nV secs typ
Minimum Load Resistance 2 kW min V
OUT
= 10 V
POWER SUPPLIES
V
DD
Range 11.4/16.5 V min/V max For Specified Performance
I
DD
13 mA max Outputs Unloaded; V
IN
= V
INL
or V
INH
I
SS
11 mA max Outputs Unloaded; V
IN
= V
INL
or V
INH
SWITCHING CHARACTERISTICS
4, 5
Address to Write Setup Time, t
AS
0ns min
Address to Write Hold Time, t
AH
0ns min
Data Valid to Write Setup Time, t
DS
50 ns min
Data Valid to Write Hold Time, t
DH
0ns min
Write Pulsewidth, t
WR
50 ns min
NOTES
1
Maximum possible reference voltage.
2
Temperature ranges are as follows:
K Version: –40∞C to +85∞C
B Version: –40∞C to +85∞C
3
Guaranteed by design. Not production tested.
4
Sample Tested at 25∞C to ensure compliance.
5
Switching Characteristics apply for single and dual supply operation.
Specifications subject to change without notice.
4
o
f
1
4
D