AD7450AR View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD7450AR Datasheet PDF : 24 Pages
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PRELIMINARY TECHNICAL DATA
AD7450
PERFORMANCE CURVES
TPC 1 and TPC 2 show the typical FFT plots for the
AD7450 with VDD of 5V and 3V, 1MHz and 833kHz sam-
pling frequency respectively and an input frequency of
300kHz.
TPC 3 shows the signal-to-(noise+distortion) ratio
performance versus the analog input frequency for
various supply voltages while sampling at 1MSPS
(VDD = 5V±5%) and 833kSPS (VDD = 3V±10%).
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8192 POINT FFT
FSAMPLE = 1MSPS
-20
FIN = 300kHz
SINAD = 71.7dB
THD = -82.8dB
SFDR = -85.3dB
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-120
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FREQUENCY (kHz)
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TITLE
TPC 1. AD7450 Dynamic Performance at 1MSPS
with VDD =5V
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8192 POINT FFT
fSAMPLE = 833ksps
-20 fIN = 300kHz
SINAD = 70.2dB
THD = -86dB
SFDR = -87.1dB
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-60
-80
-100
-120
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FREQUENCY (kHz)
TPC 3. SINAD vs Analog Input Frequency
for Various Supply Voltages TBD
TPC 4 shows the power supply rejection ratio versus
supply ripple frequency for the AD7450. Here, a
200mV p-p sine wave is coupled onto the VDD supply.
A 10nF decoupling capacitor was used on the supply
and a 1µF decoupling capacitor was used on VREF.
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TPC 2. AD7450 Dynamic Performance at 833ksps with
VDD = 3V
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TITLE
TPC 4. Power Supply Rejection (see Terminology Sec-
tion) vs. Supply Ripple Frequency at 5V and 3V TBD
REV. PrJ
–7–
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