Datasheet

AD7298-1
Rev. A | Page 3 of 24
SPECIFICATIONS
V
DD
= 2.8 V to 3.6 V, V
DRIVE
= 1.65 V to 3.6 V, f
SAMPLE
= 1 MSPS, f
SCLK
= 20 MHz, V
REF
= 2.5 V internal, T
A
= −40°C to +125°C, unless
otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 50 kHz sine wave
Signal-to-Noise Ratio (SNR)
1
61 61.5 dB
Signal-to-Noise-(and-Distortion) Ratio (SINAD)
2
61 61.5 dB
Total Harmonic Distortion (THD)
2
−82 −75 dB
Spurious-Free Dynamic Range (SFDR) −83 −76 dB
Intermodulation Distortion (IMD) f
A
= 40.1 kHz, f
B
= 41.5 kHz
Second-Order Terms −86 dB
Third-Order Terms −86 dB
Channel-to-Channel Isolation −90 dB f
IN
= 50 kHz, f
NOISE
= 60 kHz
SAMPLE AND HOLD
Aperture Delay
3
12 ns
Aperture Jitter
3
40 ps
Full Power Bandwidth 30 MHz At 3 dB
10 MHz At 0.1 dB
DC ACCURACY
Resolution 10 Bits
Integral Nonlinearity (INL)
2
±0.25 ±0.5 LSB
Differential Nonlinearity (DNL)
2
±0.3 ±0.5 LSB Guaranteed no missed codes to 10 bits
Offset Error
2
±0.5 ±1.125 LSB
Offset Error Matching
2
±0.625 ±1.125 LSB
Offset Temperature Drift 4 ppm/°C
Gain Error
2
±0.25 ±1 LSB
Gain Error Matching
2
±0.16 ±0.625 LSB
Gain Temperature Drift 0.5 ppm/°C
ANALOG INPUT
Input Voltage Ranges 0 V
REF
V
DC Leakage Current ±0.01 ±1 μA
Input Capacitance 32 pF When in track mode
8 pF When in hold mode
REFERENCE INPUT/OUTPUT
Reference Output Voltage
4
2.4925 2.5 2.5075 V ±0.3% maximum at 25°C
Long-Term Stability 150 ppm For 1000 hours
Output Voltage Hysteresis 50 ppm
Reference Input Voltage Range 1 2.5 V
DC Leakage Current ±0.01 ±1 μA External reference applied to the V
REF
pin
V
REF
Output Impedance 1 Ω
V
REF
Temperature Coefficient 12 35 ppm/°C
V
REF
Noise 60 μV rms Bandwidth = 10 MHz
LOGIC INPUTS
Input High Voltage, V
INH
0.7 × V
DRIVE
V
Input Low Voltage, V
INL
0.3 × V
DRIVE
V
Input Current, I
IN
±0.01 ±1 μA V
IN
= 0 V or V
DRIVE
Input Capacitance, C
IN
3
3 pF