Datasheet
REV. A–2–
AD974–SPECIFICATIONS
A Grade B Grade
Parameter Conditions Min Typ Max Min Typ Max Units
RESOLUTION 16 16 Bits
ANALOG INPUT
Voltage Range ±10 V, 0 V to +4 V, 0 V to +5 V (See Table I)
Impedance Channel On or Off (See Table I)
Sampling Capacitance 40 40 pF
THROUGHPUT SPEED
Complete Cycle
(Acquire and Convert) 5 5 µs
Throughput Rate 200 200 kHz
DC ACCURACY
Integral Linearity Error ±3 ±2.0 LSB
1
Differential Linearity Error –2 +3 –1 +1.75 LSB
No Missing Codes 15 16 Bits
Transition Noise
2
1.0 1.0 LSB
Full-Scale Error
3
Internal Reference ±0.5 ±0.25 %
Full-Scale Error Drift Internal Reference ±7 ±7 ppm/°C
Full-Scale Error Ext. REF = +2.5 V ±0.5 ±0.25 %
Full-Scale Error Drift Ext. REF = +2.5 V ±2 ±2 ppm/°C
Bipolar Zero Error Bipolar Range ±10 ±10 mV
Bipolar Zero Error Drift Bipolar Range ±2 ±2 ppm/°C
Unipolar Zero Error Unipolar Ranges ±10 ±10 mV
Unipolar Zero Error Drift Unipolar Ranges ±2 ±2 ppm/°C
Channel-to-Channel Matching ±0.1 ±0.05 % FSR
Recovery to Rated Accuracy
After Power-Down
4
2.2 µF to CAP 1 1 ms
Power Supply Sensitivity
V
ANA
= V
DIG
= V
D
V
D
= 5 V ± 5% ±8 ±8 LSB
AC ACCURACY
Spurious Free Dynamic Range f
IN
= 20 kHz 90 96 dB
5
Total Harmonic Distortion f
IN
= 20 kHz –90 –96 dB
Signal-to-(Noise+Distortion) f
IN
= 20 kHz 83 85 dB
–60 dB Input 27 28 dB
Signal-to-Noise f
IN
= 20 kHz 83 85 dB
Channel-to-Channel Isolation f
IN
= 20 kHz –110 –100 –110 –100 dB
Full Power Bandwidth
6
1 1 MHz
–3 dB Input Bandwidth 2.7 2.7 MHz
SAMPLING DYNAMICS
Aperture Delay 40 40 ns
Transient Response Full-Scale Step 1 1 µs
Overvoltage Recovery
7
150 150 ns
REFERENCE
Internal Reference Voltage 2.48 2.5 2.52 2.48 2.5 2.52 V
Internal Reference Source Current 1 1 µA
External Reference Voltage Range
for Specified Linearity 2.3 2.5 2.7 2.3 2.5 2.7 V
External Reference Current Drain Ext. REF = +2.5 V 100 100 µA
DIGITAL INPUTS
Logic Levels
V
IL
–0.3 +0.8 –0.3 +0.8 V
V
IH
+2.0 V
DIG
+ 0.3 +2.0 V
DIG
+ 0.3 V
I
IL
±10 ±10 µA
I
IH
±10 ±10 µA
(–40ⴗC to +85ⴗC, f
S
= 200 kHz, V
DIG
= V
ANA
= +5 V, unless otherwise noted)