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参数资料
| 型号： | 5962-0720801VXC |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, CQFP84 |
| 封装： | CERAMIC, CFP-84 |
| 文件页数： | 8/20页 |
| 文件大小： | 681K |
| 代理商： | 5962-0720801VXC |
www.ti.com
R
50
0
W
Z
50
0
W
ADS5463M
AIN
S0176-03
R
200 W
ACSignal
Source
Mini-Circuits
JTX-4-10T
ADS5463M
THS9001
AIN
VIN
THS9001
S0177-03
1000pF
39pF
50 W
0.1 F
m
1000pF
18 H
m
SGLS378 – MARCH 2008
For a full-scale differential input, each of the differential lines of the input signal (pins 17 and 18) swings
symmetrically between 2.4 V + 0.55 V and 2.4 V – 0.55 V. This means that each input has a maximum signal
swing of 1.1 Vpp for a total differential input signal swing of 2.2 Vpp. The maximum swing is determined by the
internal reference voltage generator, eliminating the need for any external circuitry for this purpose.
The ADS5463 obtains optimum performance when the analog inputs are driven differentially. The circuit in
Figure 15 shows one possible configuration using an RF transformer with termination either on the primary or on
the secondary of the transformer. In addition, the evaluation module is configured with two back-to-back
transformers, which also demonstrate good performance. If voltage gain is required, a step-up transformer can
be used.
Besides the transformer configurations, Texas Instruments offers a wide selection of single-ended operational
amplifiers that can be selected depending on the application. An RF gain-block amplifier, such as Texas
Instruments' THS9001, also can be used for high-input-frequency applications. For large voltage gains at
intermediate-frequencies in the 50 MHz–500 MHz range, the configuration shown in Figure 16 can be used. The
component values can be tuned for different intermediate frequencies. The example shown is located on the
evaluation module and is tuned for an IF of 170 MHz. More information regarding this configuration can be found
in the ADS5463 EVM User Guide (SLAU194) and the THS9001 50 MHz to 350 MHz Cascadeable Amplifier data
sheet (SLOS426).
Figure 15. Converting a Single-Ended Input to a Differential Signal Using an RF Transformer
Figure 16. Using the THS9001 IF Amplifier With the ADS5463
16
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s) :ADS5463-SP
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