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ADS5500MPAPREP 数据表(PDF) 26 Page - Texas Instruments

部件名 ADS5500MPAPREP
功能描述  14-Bit 125-MSPS Analog-to-Digital Converter
PDF  39 Pages
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制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

ADS5500MPAPREP 数据表(HTML) 26 Page - Texas Instruments

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ADS5500-EP
SGLS286C − JUNE 2005 – REVISED SEPTEMBER 2008
www.ti.com
26
Table 4. Recommended Amplifiers to Drive Input of ADS5500
INPUT SIGNAL FREQUENCY
RECOMMENDED AMPLIFIER
TYPE OF AMPLIFIER
USE WITH TRANSFORMER?
DC to 20 MHz
THS4503 (1)
Differential in/out amplifier
No
DC to 50 MHz
OPA847 (1)
Operational amplifier
Yes
OPA695 (1)
Operational amplifier
Yes
10 MHz to 120 MHz
THS3201 (1)
Operational amplifier
Yes
10 MHz to 120 MHz
THS3202 (1)
Operational amplifier
Yes
Over 100 MHz
THS9001 (1)
RF gain block
Yes
(1) Potential EP devices
R
IN
R
IN
C
IN
0.1
mF
R
T
100
W
0.1
mF
1000pF
1:1
R
S
100
W
OPA695
R
1
400
W
A
V =8V/V
(18dB)
R
2
57.5
W
V
IN
ADS5500
INP
INM
CM
-5V
+5V
10
W
Figure 7. Converting Single-Ended Input Signal to Differential Signal Using an RF Transformer
R
F
R
G
V
OCM
INP
INM
CM
R
F
R
G
R
S
ADS5500
14−Bit/125MSPS
0.1
mF
0.1
mF
10
mF
1
mF
R
T
+3.3V
+5V
0.1
mF
10
mF
-5V
THS4503
R
IN
R
IN
10
W
Figure 8. Using THS4503 With ADS5500
POWER−SUPPLY SEQUENCE
The ADS5500 requires a power-up sequence where the
DRVDD supply must be at least 0.4 V by the time the
AVDD supply reaches 3 V. Powering up both supplies at
the same time works without any problem. If this
sequence is not followed, the device may stay in
power-down mode.



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