Datasheet

AD7276/AD7277/AD7278
Rev. C | Page 7 of 28
AD7278 SPECIFICATIONS
V
DD
= 2.35 V to 3.6 V, f
SCLK
= 48 MHz, f
SAMPLE
= 3 MSPS, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 4.
Parameter A Grade
1, 2
B Grade
1, 2
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 1 MHz sine wave
Signal-to-Noise + Distortion (SINAD)
3
49 49 dB min
Total Harmonic Distortion (THD)
3
−66 −67 dB max
−73 −73 dB typ
Peak Harmonic or Spurious Noise (SFDR)
3
−69 −69 dB typ
Intermodulation Distortion (IMD)
3
Second-Order Terms −76 −76 dB typ fa = 1 MHz, fb = 0.97 MHz
Third-Order Terms −76 −76 dB typ fa = 1 MHz, fb = 0.97 MHz
Aperture Delay 5 5 ns typ
Aperture Jitter 18 18 ps typ
Full Power Bandwidth 74 74 MHz typ @ 3 dB
Full Power Bandwidth 10 10 MHz typ @ 0.1 dB
DC ACCURACY
Resolution 8 8 Bits
Integral Nonlinearity
3
±0.2 ±0.2 LSB max
Differential Nonlinearity
3
±0.3 ±0.3 LSB max Guaranteed no missed codes to 8 bits
Offset Error
3
±0.9 ±0.5 LSB max
Gain Error
3
±1.2 ±1 LSB max
Total Unadjusted Error (TUE)
3
±1.5 ±1.5 LSB max
ANALOG INPUT
Input Voltage Ranges 0 to V
DD
0 to V
DD
V
DC Leakage Current ±1 ±1 μA max −40°C to +85°C
±5.5 ±5.5 μA max 85°C to 125°C
Input Capacitance 42 42 pF typ When in track
10 10 pF typ When in hold
LOGIC INPUTS
Input High Voltage, V
INH
1.7 1.7 V min 2.35 V ≤ V
DD
≤ 2.7 V
2 2 V min 2.7 V < V
DD
≤ 3.6 V
Input Low Voltage, V
INL
0.7 0.7 V max 2.35 V ≤ V
DD
≤ 2.7 V
0.8 0.8 V max 2.7 V < V
DD
≤ 3.6 V
Input Current, I
IN
±1 ±1 μA max
Input Capacitance, C
IN
4
2 2 pF typ
LOGIC OUTPUTS
Output High Voltage, V
OH
V
DD
− 0.2 V
DD
− 0.2 V min I
SOURCE
= 200 μA, V
DD
= 2.35 V to 3.6 V
Output Low Voltage, V
OL
0.2 0.2 V max I
SINK
= 200 μA
Floating-State Leakage Current ±2.5 ±2.5 μA max
Floating-State Output Capacitance
4
4.5 4.5 pF typ
Output Coding Straight (natural) binary
CONVERSION RATE
Conversion Time 208 208 ns max 10 SCLK cycles with SCLK at 48 MHz
Track-and-Hold Acquisition Time
3
60 60 ns min
Throughput Rate 4 4 MSPS max SCLK at 48 MHz