Datasheet

REV. F
–2–
AD7824/AD7828–SPECIFICATIONS
(V
DD
= 5 V, V
REF
(+) = 5 V, V
REF
(–) = GND = O V, unless otherwise
noted. All specifications T
MIN
to T
MAX
, unless otherwise noted. Specifications apply to Mode 0.)
Parameter K Version
1
L Version B, T Versions C, U Versions Unit Conditions/Comments
ACCURACY
Resolution 8 8 8 8 Bits
Total Unadjusted Error
2
± 1 ± 1/2 ± 1 ± 1/2 LSB max
Minimum Resolution for which
No Missing Codes Are Guaranteed 8 8 8 8 Bits
Channel-to-Channel Mismatch ± 1/4 ± 1/4 ± 1/4 ± 1/4 LSB max
REFERENCE INPUT
Input Resistance 1.0/4.0 1.0/4.0 1.0/4.0 1.0/4.0 kΩ min/kΩ max
V
REF
(+) Input Voltage Range V
REF
(–)/ V
REF
(–)/ V
REF
(–)/ V
REF
(–)/ V min/V max
V
DD
V
DD
V
DD
V
DD
V
REF
(–) Input Voltage Range GND/ GND/ GND/ GND/ V min/V max
V
REF
(+) V
REF
(+) V
REF
(+) V
REF
(+)
ANALOG INPUT
Input Voltage Range V
REF
(–)/ V
REF
(–)/ V
REF
(–)/ V
REF
(–)/ V min/V max
V
REF
(+) V
REF
(+) V
REF
(+) V
REF
(+)
Input Leakage Current ± 3 ± 3 ± 3 ± 3 µA max Analog Input Any Channel
Input Capacitance
3
45 45 45 45 pF typ 0 V to 5 V
LOGIC INPUTS
RD, CS, A0, A1, and A2
V
INH
2.4 2.4 2.4 2.4 V min
V
INL
0.8 0.8 0.8 0.8 V max
I
INH
111 1 µA max
I
INL
–1 –1 –1 –1 µA max
Input Capacitance
3
8888pF max Typically 5 pF
LOGIC OUTPUTS
DB0–DB7 and INT
V
OH
4.0 4.0 4.0 4.0 V min I
SOURCE
= 360 µA
V
OL
0.4 0.4 0.4 0.4 V max I
SINK
= 1.6 mA
I
OUT
(DB0–DB7) ± 3 ± 3 ± 3 ± 3 µA max Floating State Leakage
Output Capacitance
3
8888pF max Typically 5 pF
RDY
V
OL
4
0.4 0.4 0.4 0.4 V max I
SINK
= 2.6 mA
I
OUT
± 3 ± 3 ± 3 ± 3 µA max Floating State Leakage
Output Capacitance 8 8 8 8 pF max Typically 5 pF
SLEW RATE, TRACKING
3
0.7 0.7 0.7 0.7 V/µs typ
0.157 0.157 0.157 0.157 V/µs max
POWER SUPPLY
V
DD
555 5 V ± 5% for Specified
Performance
I
DD
5
16 16 20 20 mA max CS = RD = 2.4 V
Power Dissipation 50 50 50 50 mW typ
80 80 100 100 mW max
Power Supply Sensitivity ± 1/4 ± 1/4 ± 1/4 ± 1/4 LSB max ± 1/16 LSB typ
V
DD
= 5 V ± 5%
NOTES
1
Temperature ranges are as follows: K, L Versions: 0°C to 70°C
B, C Versions: –40°C to +85°C
T, U Versions: –55°C to +125°C
2
Total Unadjusted Error includes offset, full-scale and linearity errors.
3
Sample tested at 25°C by Product Assurance to ensure compliance.
4
RDY is an open-drain output.
5
See Typical Performance Characteristics.
Specifications subject to change without notice.