Datasheet
REV. B
–2–
AD7819–SPECIFICATIONS
1
(GND = 0 V, V
REF
= V
DD
= 3 V 10% to 5 V 10%. All specifications –40C
to +125C unless otherwise noted.)
Parameter Y Version Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 30 kHz, f
SAMPLE
= 136 kHz
Signal to (Noise + Distortion) Ratio
1
48 dB min
Total Harmonic Distortion (THD)
1
–70 dB typ
Peak Harmonic or Spurious Noise
1
–70 dB typ
Intermodulation Distortion
2
fa = 29.1 kHz; fb = 29.8 kHz
2nd Order Terms –77 dB typ
3rd Order Terms –77 dB typ
DC ACCURACY
Resolution 8 Bits
Minimum Resolution for Which
No Missing Codes Are Guaranteed 8 Bits
Relative Accuracy
1
± 0.5 LSB max
Differential Nonlinearity (DNL)
1
± 0.5 LSB max
Total Unadjusted Error
1
± 1 LSB max
Gain Error
1
± 0.5 LSB max
Offset Error
1
± 0.5 LSB max
ANALOG INPUT
Input Voltage Range 0 V min
V
REF
V max
Input Leakage Current
2
± 1 µA max
Input Capacitance
2
15 pF mx
REFERENCE INPUTS
2
V
REF
Input Voltage Range 1.2 V min
V
DD
V max
Input Leakage Current ± 1 µA max
Input Capacitance 20 pF max
LOGIC INPUTS
2
V
INH,
Input High Voltage 2.0 V min
V
INL,
Input Low Voltage 0.4 V max (0.8 V max, V
DD
= 5 V)
Input Current, I
IN
± 1 µA max Typically 10 nA, V
IN
= 0 V to V
DD
Input Capacitance, C
IN
8 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
2.4 V min I
SOURCE
= 200 µA
Output Low Voltage, V
OL
0.4 V max I
SINK
= 200 µA
High Impedance Leakage Current ± 1 µA max
High Impedance Capacitance 15 pF max
CONVERSION RATE
Conversion Time 4.5 µs max
Track/Hold Acquisition Time
1
100 ns max See DC Acquisition Section
POWER SUPPLY
V
DD
2.7–5.5 Volts For Specified Performance
I
DD
Digital Inputs = 0 V or V
DD
Normal Operation 3.5 mA max
Power-Down 1 µA max V
DD
= 5 V
Power Dissipation
Normal Operation 17.5 mW max V
DD
= 5 V
Power-Down 5 µW max
Auto Power-Down (Mode 2) V
DD
= 3 V
1 kSPS Throughput 57.75 µW max
10 kSPS Throughput 577.5 µW max
50 kSPS Throughput 2.89 mW max
NOTES
1
See Terminology section.
2
Sample tested during initial release and after any redesign or process change that may affect this parameter.
Specifications subject to change without notice.