Datasheet

Data Sheet AD7625
Rev. A | Page 3 of 24
SPECIFICATIONS
VDD1 = 5 V; VDD2 = 2.5 V; VIO = 2.5 V; REF = 4.096 V; all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter Test Conditions/Comments Min Typ Max Unit
RESOLUTION 16 Bits
ANALOG INPUT
Voltage Range V
IN+
− V
IN−
−V
REF
+V
REF
V
Operating Input Voltage V
IN+
, V
IN−
to GND −0.1 V
REF
+ 0.1 V
Common-Mode Input Range V
REF
/2 − 0.05 V
REF
/2 V
REF
/2 + 0.05 V
Common-Mode Rejection Ratio f
IN
= 1 MHz 60 dB
Input Current Midscale input 77 µA
THROUGHPUT
Complete Cycle 166 ns
Throughput Rate 0.1 6 MSPS
DC ACCURACY
Integral Linearity Error −1 ±0.45 +1 LSB
No Missing Codes 16 Bits
Differential Linearity Error −0.5 ±0.3 +0.5 LSB
Transition Noise 0.6 LSB
Zero Error T
MIN
to T
MAX
−4 ±1.5 +4 LSB
Zero Error Drift 0.5 ppm/°C
Gain Error T
MIN
to T
MAX
8 20 LSB
Gain Error Drift 0.4 ppm/°C
Power Supply Sensitivity
1
VDD1 = 5 V ± 5% 0.4 LSB
VDD2 = 2.5 V ± 5% 0.2 LSB
AC ACCURACY
External Reference f
IN
= 20 kHz
Dynamic Range
92.5
93.2
dB
Signal-to-Noise Ratio 92 93 dB
Spurious-Free Dynamic Range 106 dB
Total Harmonic Distortion −105.5 dB
Signal-to-(Noise + Distortion) 91.5 92 dB
Internal Reference f
IN
= 20 kHz
Dynamic Range 92.5 93.2 dB
Signal-to-Noise Ratio 91.5 92.9 dB
Spurious-Free Dynamic Range 106 dB
Total Harmonic Distortion −105.5 dB
Signal-to-(Noise + Distortion) 91 92.5 dB
−3 dB Input Bandwidth 100 MHz
Aperture Jitter 0.25 ps rms
INTERNAL REFERENCE
Output Voltage
REFIN @ 25°C
1.2
V
Temperature Drift −40°C to +85°C ±15 ppm/°C
REFERENCE BUFFER
REFIN Input Voltage Range 1.2 V
REF Output Voltage Range 4.076 4.096 4.116 V
Line Regulation VDD1 ± 5%, VDD2 ± 5% 5 mV
EXTERNAL REFERENCE
Voltage Range REF 4.096 V
VCM PIN
@ 25°C
Output Voltage REF/2 V
Output Impedance 4 5 6 kΩ