Datasheet

Data Sheet AD7951
Rev. A | Page 3 of 32
SPECIFICATIONS
AVDD = DVDD = 5 V; OVDD = 2.7 V to 5.5 V; VCC = 15 V; VEE = −15 V; V
REF
= 5 V; all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter Conditions/Comments Min Typ Max Unit
RESOLUTION 14 Bits
ANALOG INPUT
Voltage Range, V
IN
V
IN+
− V
IN−
= 0 V to 5 V −0.1 +5.1 V
V
IN+
− V
IN−
= 0 V to 10 V −0.1 +10.1 V
V
IN+
− V
IN−
= ±5 V −5.1 +5.1 V
V
IN+
− V
IN−
= ±10 V −10.1 +10.1 V
V
IN−
to AGND −0.1 +0.1 V
Analog Input CMRR f
IN
= 100 kHz 75 dB
Input Current V
IN
= ±5 V, ±10 V @ 1 MSPS 300
1
µA
Input Impedance See the Analog Inputs section
THROUGHPUT SPEED
Complete Cycle In warp mode 1 s
Throughput Rate In warp mode 1 1 MSPS
Time Between Conversions In warp mode 1 ms
Complete Cycle In normal mode 1.25 s
Throughput Rate In normal mode 0 800 kSPS
Complete Cycle In impulse mode 1.49 s
Throughput Rate In impulse mode 0 670 kSPS
DC ACCURACY
Integral Linearity Error
2
−1 ±0.3 +1 LSB
3
No Missing Codes
2
14 Bits
Differential Linearity Error
2
−1 +1 LSB
Transition Noise 0.55 LSB
Zero Error (Unipolar or Bipolar) −15 +15 LSB
Zero Error Temperature Drift ±1 ppm/°C
Full-Scale Error (Unipolar or Bipolar) −20 +20 LSB
Full-Scale Error Temperature Drift ±1 ppm/°C
Power Supply Sensitivity AVDD = 5 V ± 5% ±0.8 LSB
AC ACCURACY
Dynamic Range f
IN
= 2 kHz, −60 dB 84.5 85.5 dB
4
Signal-to-Noise Ratio f
IN
= 2 kHz 84.5 85.5 dB
f
IN
= 20 kHz 85.5 dB
Signal-to-(Noise + Distortion) (SINAD) f
IN
= 2 kHz 83 85.4 dB
Total Harmonic Distortion f
IN
= 2 kHz −105 dB
Spurious-Free Dynamic Range f
IN
= 2 kHz 102 dB
–3 dB Input Bandwidth V
IN
= 0 V to 5 V 45 MHz
Aperture Delay 2 ns
Aperture Jitter 5 ps rms
Transient Response Full-scale step 500 ns
INTERNAL REFERENCE PDREF = PDBUF = low
Output Voltage REF @ 25°C 4.965 5.000 5.035 V
Temperature Drift –40°C to +85°C ±3 ppm/°C
Line Regulation AVDD = 5 V ± 5% ±15 ppm/V
Long-Term Drift 1000 hours 50 ppm
Turn-On Settling Time C
REF
= 22 µF 10 ms