Datasheet

AD7476/AD7477/AD7478
Rev. F | Page 3 of 24
SPECIFICATIONS
AD7476 SPECIFICATIONS
A version: V
DD
= 2.7 V to 5.25 V, f
SCLK
= 20 MHz, f
SAMPLE
= 1 MSPS, unless otherwise noted; S and B versions: V
DD
= 2.35 V to 5.25 V,
f
SCLK
= 12 MHz, f
SAMPLE
= 600 kSPS, unless otherwise noted; T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter A Version
1,2
B Version
1,2
S Version
1,2
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 100 kHz sine wave
Signal-to-(Noise + Distortion) (SINAD)
3
69 70 69 dB min B version, V
DD
= 2.4 V to 5.25 V
70 70 dB min T
A
= 25°C
71.5 dB typ
Signal-to-Noise Ratio (SNR)
3
70 71 70 dB min B version, V
DD
= 2.4 V to 5.25 V
72.5 dB typ
Total Harmonic Distortion (THD)
3
−80 −78 −78 dB typ
Peak Harmonic or Spurious Noise (SFDR)
3
−82 −80 −80 dB typ
Intermodulation Distortion (IMD)
3
Second-Order Terms −78 −78 −78 dB typ fa = 103.5 kHz, fb = 113.5 kHz
Third-Order Terms −78 −78 −78 dB typ fa = 103.5 kHz, fb = 113.5 kHz
Aperture Delay 10 10 10 ns typ
Aperture Jitter 30 30 30 ps typ
Full Power Bandwidth 6.5 6.5 6.5 MHz typ @ 3 dB
DC ACCURACY S, B versions, V
DD
= (2.35 V to 3.6 V)
4
;
A version, V
DD
= (2.7 V to 3.6 V)
Resolution 12 12 12 Bits
Integral Nonlinearity
3
±1.5 ±1.5 LSB max
±1 ±0.6 ±0.6 LSB typ
Differential Nonlinearity
3
−0.9/+1.5 −0.9/+1.5 LSB max Guaranteed no missed codes to 12 bits
±0.75 ±0.75 ±0.75 LSB typ
Offset Error
3
±1.5 ±2 LSB max
±0.5 LSB typ
Gain Error
3
±1.5 ±2 LSB max
±0.5 LSB typ
ANALOG INPUT
Input Voltage Ranges 0 to V
DD
0 to V
DD
0 to V
DD
V
DC Leakage Current ±1 ±1 ±1 μA max
Input Capacitance 30 30 30 pF typ
LOGIC INPUT
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
0.4 0.4 0.4 V max V
DD
= 3 V
0.8 0.8 0.8 V max V
DD
= 5 V
Input Current, I
IN
, SCLK Pin ±1 ±1 ±1 μA max Typically 10 nA, V
IN
= 0 V or V
DD
Input Current, I
IN
, CS Pin
±1 ±1 ±1 μA typ
Input Capacitance, C
IN
5
10 10 10 pF max
LOGIC OUTPUT
Output High Voltage, V
OH
V
DD
− 0.2 V
DD
− 0.2 V
DD
− 0.2 V min I
SOURCE
= 200 μA; V
DD
= 2.35 V to 5.25 V
Output Low Voltage, V
OL
0.4 0.4 0.4 V max I
SINK
= 200 μA
Floating-State Leakage Current ±10 ±10 ±10 μA max
Floating-State Output Capacitance
5
10 10 10 pF max
Output Coding Straight (Natural) Binary