Datasheet

AD7674
Rev. A | Page 3 of 28
SPECIFICATIONS
Table 2. –40°C to +85°C, V
REF
= 4.096 V, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.
Parameter Conditions Min Typ Max Unit
RESOLUTION 18 Bits
ANALOG INPUT
Voltage Range V
IN+
– V
IN–
–V
REF
+V
REF
V
Operating Input Voltage V
IN+
, V
IN–
to AGND –0.1 AVDD V
Analog Input CMRR f
IN
= 100 kHz 65 dB
Input Current 800 kSPS throughput 100 μA
Input Impedance
1
THROUGHPUT SPEED
Complete Cycle In warp mode 1.25 μs
Throughput Rate In warp mode 1 800 kSPS
Time between Conversions In warp mode 1 ms
Complete Cycle In normal mode 1.5 μs
Throughput Rate In normal mode 0 666 kSPS
Complete Cycle In impulse mode 1.75 μs
Throughput Rate In impulse mode 0 570 kSPS
DC ACCURACY
Integral Linearity Error –2.5 +2.5 LSB
2
Differential Linearity Error –1 +1.75 LSB
No Missing Codes 18 Bits
Transition Noise V
REF
= 5 V 0.7 LSB
Zero Error, T
MIN
to T
MAX
In warp mode –25 +25 LSB
Zero Error, T
MIN
to T
MAX
In normal or impulse mode –85 +85 LSB
Zero Error Temperature Drift All modes ±0.5 ppm/°C
Gain Error, T
MIN
to T
MAX
3
In warp mode –0.034 +0.034 % of FSR
Gain Error, T
MIN
to T
MAX
3
In normal or impulse mode –0.048 +0.048 % of FSR
Gain Error Temperature Drift All modes ±1.6 ppm/°C
Power Supply Sensitivity AVDD = 5 V ± 5% ±4 LSB
AC ACCURACY
Signal-to-Noise f
IN
= 2 kHz, V
REF
= 5 V 101 dB
4
V
REF
= 4.096 V 97.5 99 dB
f
IN
= 10 kHz, V
REF
= 4.096 V 98 dB
f
IN
= 100 kHz, V
REF
= 4.096 V 97 dB
Dynamic Range V
IN+
= V
IN–
= V
REF
/2 = 2.5 V 103 dB
Spurious-Free Dynamic Range f
IN
= 2 kHz 120 dB
f
IN
= 10 kHz 118 dB
f
IN
= 100 kHz 105 dB
Total Harmonic Distortion f
IN
= 2 kHz –115 dB
f
IN
= 10 kHz –113 dB
f
IN
= 100 kHz –98 dB
Signal-to-(Noise + Distortion) f
IN
= 2 kHz, V
REF
= 4.096 V 98 dB
f
IN
= 2 kHz, –60 dB input 40 dB
–3 dB Input Bandwidth 26 MHz
SAMPLING DYNAMICS
Aperture Delay 2 ns
Aperture Jitter 5 ps rms
Transient Response Full-scale step 250 ns
Overvoltage Recovery 250 ns