Datasheet

AD7484
Rev. C | Page 3 of 20
SPECIFICATIONS
AV
DD
/DV
DD
= 5 V ± 5%, AGND = DGND = 0 V, V
REF
= external, f
SAMPLE
= 3 MSPS; all specifications T
MIN
to T
MAX
and valid for V
DRIVE
= 2.7 V
to 5.25 V, unless otherwise noted. Operating temperature range is −40°C to +85°C.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE
1, 2
Signal-to-Noise + Distortion (SINAD)
3
76.5 dB f
IN
= 1 MHz
78 dB f
IN
= 1 MHz
79 dB f
IN
= 1 MHz, extended input
77 dB f
IN
= 1 MHz, internal reference
Total Harmonic Distortion (THD)
3
−90 dB
−95 dB
−92 dB Internal reference
Peak Harmonic or Spurious Noise
(SFDR)
3
−90 dB
Intermodulation Distortion (IMD)
3
Second Order Terms −96 dB f
IN1
= 95.053 kHz, f
IN2
= 105.329 kHz
Third Order Terms −94 dB
Aperture Delay 10 ns
Full Power Bandwidth 40 MHz @ 3 dB
3.5 MHz @ 0.1 dB
DC ACCURACY
Resolution 14 Bits
Integral Nonlinearity
3
±0.5 ±1 LSB
Differential Nonlinearity
3
±0.3 ±0.75 LSB Guaranteed no missed codes to 14 bits
Offset Error
3
±6 LSB
0.036 %FSR
Gain Error
3
±6 LSB
0.036 %FSR
ANALOG INPUT
Input Voltage −200 mV
+2.7 V
DC Leakage Current ±1 µA V
IN
from 0 V to 2.7 V
±2 µA V
IN
= −200 mV
Input Capacitance
4
35 pF
REFERENCE INPUT/OUTPUT
Input Voltage, V
REFIN
+2.5 V ± 1% for specified performance
Input DC Leakage Current, V
REFIN
±1 µA
Input Capacitance, V
REFIN
4
25 pF
Input Current, V
REFIN
220 µA External reference
Output Voltage, V
REFOUT
+2.5 V
Error @ 25°C, V
REFOUT
±50 mV
Error T
MIN
to T
MAX
, V
REFOUT
±100 mV
Output Impedance, V
REFOUT
1 Ω