Datasheet

AD7476A/AD7477A/AD7478A
Rev. F | Page 6 of 28
Parameter A Grade
2
Unit Test Conditions/Comments
POWER REQUIREMENTS
V
DD
2.35/5.25 V min/max
I
DD
Digital I/Ps = 0 V or V
DD
Normal Mode (Static) 2.5 mA typ V
DD
= 4.75 V to 5.25 V, SCLK on or off
1.2 mA typ V
DD
= 2.35 V to 3.6 V, SCLK on or off
Normal Mode (Operational) 3.5 mA max V
DD
= 4.75 V to 5.25 V, f
SAMPLE
= 1 MSPS
1.7 mA max V
DD
= 2.35 V to 3.6 V, f
SAMPLE
= 1 MSPS
Full Power-Down Mode (Static) 1 μA max Typically 50 nA
Full Power-Down Mode (Dynamic) 0.6 mA typ V
DD
= 5 V, f
SAMPLE
= 100 kSPS
Power Dissipation
6
0.3 mA typ V
DD
= 3 V, f
SAMPLE
= 100 kSPS
Normal Mode (Operational) 17.5 mW max V
DD
= 5 V, f
SAMPLE
= 1 MSPS
5.1 mW max V
DD
= 3 V, f
SAMPLE
= 1 MSPS
Full Power-Down Mode 5 μW max V
DD
= 5 V
1
Temperature range is from –40°C to +85°C.
2
Operational from V
DD
= 2.0 V, with input high voltage (V
INH
) 1.8 V minimum.
3
See the Terminology section.
4
SC70 values guaranteed by characterization.
5
Guaranteed by characterization.
6
See the Power vs. Throughput Rate section.
AD7478A SPECIFICATIONS
V
DD
= 2.35 V to 5.25 V, f
SCLK
= 20 MHz, f
SAMPLE
= 1 MSPS, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
1
Table 3.
Parameter A Grade
2
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 100 kHz sine wave
Signal-to-Noise + Distortion (SINAD)
3
49 dB min
Total Harmonic Distortion (THD)
3
–65 dB max
Peak Harmonic or Spurious Noise (SFDR)
3
–65 dB max
Intermodulation Distortion (IMD)
3
Second-Order Terms –76 dB typ fa = 100.73 kHz, fb = 90.7 kHz
Third-Order Terms –76 dB typ fa = 100.73 kHz, fb = 90.7 kHz
Aperture Delay 10 ns typ
Aperture Jitter 30 ps typ
Full Power Bandwidth 13.5 MHz typ @ 3 dB
2 MHz typ @ 0.1 dB
DC ACCURACY
Resolution 8 Bits
Integral Nonlinearity
3
±0.3 LSB max
Differential Nonlinearity
3
±0.3 LSB max Guaranteed no missed codes to eight bits
Offset Error
3, 4
±0.3 LSB max
Gain Error
3, 4
±0.3 LSB max
Total Unadjusted Error (TUE)
3, 4
±0.5 LSB max
ANALOG INPUT
Input Voltage Range 0 to V
DD
V
DC Leakage Current ±0.5 μA max
Input Capacitance 20 pF typ Track-and-hold in track; 6 pF typ when in hold