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AD7938 데이터시트(PDF) 5 Page - Analog Devices

부품명 AD7938
상세설명  8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
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AD7938 데이터시트(HTML) 5 Page - Analog Devices

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Data Sheet
AD7938/AD7939
Rev. C | Page 5 of 36
AD7939 SPECIFICATIONS
VDD = VDRIVE = 2.7 V to 5.25 V, internal/external VREF = 2.5 V, unless otherwise noted, fCLKIN = 25.5 MHz, fSAMPLE= 1.5 MSPS;
TA = TMIN to TMAX, unless otherwise noted.
Table 3.
Parameter
Value1
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 50 kHz sine wave
Signal-to-Noise and Distortion (SINAD)2
61
dB min
Differential mode
60
dB min
Single-ended mode
Total Harmonic Distortion (THD)2
−70
dB max
Peak Harmonic or Spurious Noise (SFDR)2
−72
dB max
Intermodulation Distortion (IMD)2
fa = 30 kHz, fb = 50 kHz
Second-Order Terms
−86
dB typ
Third-Order Terms
−90
dB typ
Channel-to-Channel Isolation
−75
dB typ
fIN = 50 kHz, fNOISe = 300 kHz
Aperture Delay2
5
ns typ
Aperture Jitter2
72
ps typ
Full Power Bandwidth2
50
MHz typ
@ 3 dB
10
MHz typ
@ 0.1 dB
DC ACCURACY
Resolution
10
Bits
Integral Nonlinearity2
±0.5
LSB max
Differential Nonlinearity2
±0.5
LSB max
Guaranteed no missed codes to 10 bits
Single-Ended and Pseudo Differential Input
Straight binary output coding
Offset Error2
±2
LSB max
Offset Error Match2
±0.5
LSB max
Gain Error2
±1.5
LSB max
Gain Error Match2
±0.5
LSB max
Fully Differential Input
Twos complement output coding
Positive Gain Error2
±1.5
LSB max
Positive Gain Error Match2
±0.5
LSB max
Zero-Code Error2
±2
LSB max
Zero-Code Error Match2
±0.5
LSB max
Negative Gain Error2
±1.5
LSB max
Negative Gain Error Match2
±0.5
LSB max
ANALOG INPUT
Single-Ended Input Range
0 to VREF
V
RANGE bit = 0
0 to 2 × VREF
V
RANGE bit = 1
Pseudo Differential Input Range
VIN+
0 to VREF
V
RANGE bit = 0
0 to 2 × VREF
V
RANGE bit =1
VIN−
−0.3 to +0.7
V typ
VDD = 3 V
−0.3 to +1.8
V typ
VDD = 5 V
Fully Differential Input Range
VIN+ and VIN−
VCM ± VREF/2
V
VCM = common-mode voltage3 = VREF/2
VIN+ and VIN−
VCM ± VREF
V
VCM = VREF, VIN+ or VIN− must remain within GND/VDD
DC Leakage Current4
±1
µA max
Input Capacitance
45
pF typ
When in track
10
pF typ
When in hold


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