Datasheet

AD7476A/AD7477A/AD7478A
Rev. F | Page 3 of 28
SPECIFICATIONS
AD7476A 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 1.
Parameter A Grade
2
B Grade
2
Y Grade
2
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 100 kHz sine wave
Signal-to-Noise + Distortion (SINAD)
3
70 70 70 dB min V
DD
= 2.35 V to 3.6 V, T
A
= 25°C
69 69 69 dB min V
DD
= 2.4 V to 3.6 V
71.5 71.5 71.5 dB typ V
DD
= 2.35 V to 3.6 V
69 69 69 dB min V
DD
= 4.75 V to 5.25 V, T
A
= 25°C
68 68 68 dB min V
DD
= 4.75 V to 5.25 V
Signal-to-Noise Ratio (SNR)
3
71 71 71 dB min V
DD
= 2.35 V to 3.6 V, T
A
= 25°C
70 70 70 dB min V
DD
= 2.4 V to 3.6 V
70 70 70 dB min V
DD
= 4.75 V to 5.25 V, T
A
= 25°C
69 69 69 dB min V
DD
= 4.75 V to 5.25 V
Total Harmonic Distortion (THD)
3
–80 –80 –80 dB typ
Peak Harmonic or Spurious Noise (SFDR)
3
–82 –82 –82 dB typ
Intermodulation Distortion (IMD)
3
Second-Order Terms –84 –84 –84 dB typ fa = 100.73 kHz, fb = 90.72 kHz
Third-Order Terms –84 –84 –84 dB typ fa = 100.73 kHz, fb = 90.72 kHz
Aperture Delay 10 10 10 ns typ
Aperture Jitter 30 30 30 ps typ
Full Power Bandwidth 13.5 13.5 13.5 MHz typ @ 3 dB
2 2 2 MHz typ @ 0.1 dB
DC ACCURACY B and Y grades
4
Resolution 12 12 12 Bits
Integral Nonlinearity
3
±1.5 ±1.5 LSB max
±0.75 LSB typ
Differential Nonlinearity –0.9/+1.5 –0.9/+1.5 LSB max Guaranteed no missed codes to 12 bits
±0.75 LSB typ
Offset Error
3, 5
±1.5 ±1.5 LSB max
±1.5 ±0.2 ±0.2 LSB typ
Gain Error
3, 5
±1.5 ±1.5 LSB max
±1.5 ±0.5 ±0.5 LSB typ
Total Unadjusted Error (TUE)
3, 5
±2 ±2 LSB max
ANALOG INPUT
Input Voltage Range 0 to V
DD
0 to V
DD
0 to V
DD
V
DC Leakage Current ±0.5 ±0.5 ±0.5 μA max
Input Capacitance 20 20 20 pF typ Track-and-hold in track; 6 pF typ when in hold
LOGIC INPUTS
Input High Voltage, V
INH
2.4 2.4 2.4 V min
1.8 1.8 1.8 V min V
DD
= 2.35 V
Input Low Voltage, V
INL
0.8 0.8 0.8 V max V
DD
= 5 V
0.4 0.4 0.4 V max V
DD
= 3 V
Input Current, I
IN
, SCLK Pin ±0.5 ±0.5 ±0.5 μA max Typically 10 nA, V
IN
= 0 V or V
DD
Input Current, I
IN
,
CS
Pin
±10 ±10 ±10 nA typ
Input Capacitance, C
IN
6
5 5 5 pF max