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Maxim MAX5865 Manuel d'utilisateur Page 3

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MAX5865
Ultra-Low-Power, High-Dynamic-
Performance, 40Msps Analog Front End
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3V, OV
DD
= 1.8V, internal reference (1.024V), C
L
≈ 10pF on all digital outputs, f
CLK
= 40MHz, ADC input amplitude = -0.5dBFS,
DAC output amplitude = 0dBFS, differential ADC input, differential DAC output, C
REFP
= C
REFN
= C
COM
= 0.33µF, Xcvr mode, unless
otherwise noted. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
ADC DC ACCURACY
Resolution 8 Bits
Integral Nonlinearity INL
±0.15
LSB
Differential Nonlinearity DNL No missing codes over temperature
±0.15
LSB
Offset Error Residual DC offset error
±0.22
±5
%FS
Gain Error Includes reference error
±0.48
±5
%FS
DC Gain Matching
±0.03 ±0.25
dB
Offset Matching ±3 LSB
Gain Temperature Coefficient
±42 ppm/°C
Offset error (V
DD
±5%)
±0.2
Power-Supply Rejection PSRR
Gain error (V
DD
±5%)
±0.07
LSB
ADC ANALOG INPUT
Input Differential Range V
ID
Differential or single-ended inputs
±0.512
V
Input Common-Mode Voltage
Range
V
DD
/ 2
V
R
IN
Switched capacitor load
120
kΩ
Input Impedance
C
IN
5pF
ADC CONVERSION RATE
Maximum Clock Frequency f
CLK
(Note 2) 40
MHz
Channel I 5
Data Latency
Channel Q 5.5
Clock
cycles
ADC DYNAMIC CHARACTERISTICS (Note 3)
f
IN
= 5.5MHz 47
48.5
Signal-to-Noise Ratio SNR
f
IN
= 20MHz
48.2
dB
f
IN
= 5.5MHz
46.5 48.4
Signal-to-Noise and Distortion
Ratio
SINAD
f
IN
= 20MHz
48.2
dB
f
IN
= 5.5MHz 58 70
Spurious-Free Dynamic Range SFDR
f
IN
= 20MHz 70
dBc
f
IN
= 5.5MHz
-75.4
Third-Harmonic Distortion HD3
f
IN
= 20MHz
-75
dBc
Intermodulation Distortion IMD f
1
= 2MHz, -7dBFS; f
2
= 2.01MHz, -7dBFS
-66
dBc
Third-Order Intermodulation
Distortion
IM3 f
1
= 2MHz, -7dBFS; f
2
= 2.01MHz, -7dBFS
-70
dBc
f
IN
= 5.5MHz
-71
-57
Total Harmonic Distortion THD
f
IN
= 20MHz
-70
dBc
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