Datasheet

REV. B
–2–
AD7224–SPECIFICATIONS
(V
DD
= 11.4 V to 16.5 V, V
SS
= –5 V 6 10%; AGND = DGND = O 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
K, B, T L, C, U
Parameter Versions
2
Versions
2
Units Conditions/Comments
STATIC PERFORMANCE
Resolution 8 8 Bits
Total Unadjusted Error ±2 ±1 LSB max V
DD
= +15 V ± 5%, V
REF
= +10 V
Relative Accuracy ±1 ±1/2 LSB max
Differential Nonlinearity ±1 ±1 LSB max Guaranteed Monotonic
Full-Scale Error ±3/2 ±1 LSB max
Full-Scale Temperature Coefficient ±20 ±20 ppm/°C max V
DD
= 14 V to 16.5 V, V
REF
= +10 V
Zero Code Error ±30 ±20 mV max
Zero Code Error Temperature Coefficient ±50 ±30 µV/°C typ
REFERENCE INPUT
Voltage Range 2 to (V
DD
– 4) 2 to (V
DD
– 4) V min to V max
Input Resistance 8 8 kΩ min
Input Capacitance
3
100 100 pF max Occurs when DAC is loaded with all 1s.
DIGITAL INPUTS
Input High Voltage, V
INH
2.4 2.4 V min
Input Low Voltage, V
INL
0.8 0.8 V max
Input Leakage Current ±1 ±1 µA max V
IN
= 0 V or V
DD
Input Capacitance
3
8 8 pF max
Input Coding Binary Binary
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
3
2.5 2.5 V/µs min
Voltage Output Settling Time
3
Positive Full-Scale Change 5 5 µs max V
REF
= +10 V; Settling Time to ±1/2 LSB
Negative Full-Scale Change 7 7 µs max V
REF
= +10 V; Settling Time to ±1/2 LSB
Digital Feedthrough 50 50 nV secs typ V
REF
= 0 V
Minimum Load Resistance 2 2 kΩ min V
OUT
= +10 V
POWER SUPPLIES
V
DD
Range 11.4/16.5 11.4/16.5 V min/V max For Specified Performance
V
SS
Range 4.5/5.5 4.5/5.5 V min/V max For Specified Performance
I
DD
@ 25°C 4 4 mA max Outputs Unloaded; V
IN
= V
INL
or V
INH
T
MIN
to T
MAX
6 6 mA max Outputs Unloaded; V
IN
= V
INL
or V
INH
I
SS
@ 25°C 3 3 mA max Outputs Unloaded; V
IN
= V
INL
or V
INH
T
MIN
to T
MAX
5 5 mA max Outputs Unloaded; V
IN
= V
INL
or V
INH
SWITCHING CHARACTERISTICS
3, 4
t
1
@ 25°C 90 90 ns min Chip Select/Load DAC Pulse Width
T
MIN
to T
MAX
90 90 ns min
t
2
@ 25°C 90 90 ns min Write/Reset Pulse Width
T
MIN
to T
MAX
90 90 ns min
t
3
@ 25°C 0 0 ns min Chip Select/Load DAC to Write Setup Time
T
MIN
to T
MAX
0 0 ns min
t
4
@ 25°C 0 0 ns min Chip Select/Load DAC to Write Hold Time
T
MIN
to T
MAX
0 0 ns min
t
5
@ 25°C 90 90 ns min Data Valid to Write Setup Time
T
MIN
to T
MAX
90 90 ns min
t
6
@ 25°C 10 10 ns min Data Valid to Write Hold Time
T
MIN
to T
MAX
10 10 ns min
NOTES
1
Maximum possible reference voltage.
2
Temperature ranges are as follows:
K, L Versions: –40°C to +85°C
B, C Versions: –40°C to +85°C
T, U Versions: –55°C to +125°C
3
Sample Tested at 25°C by Product Assurance to ensure compliance.
4
Switching characteristics apply for single and dual supply operation.
Specifications subject to change without notice.