Texas Instruments TLC5510, Руководство пользователя

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Purpose
1-2
1.1 Purpose
The TLC5540/TLC5510/TLC5510A evaluation module (EVM) provides a plat-
form for lab prototype evaluation of the Texas Instruments TLC5540/
TLC5510/TLC5510A 8-bit, high-speed analog-to-digital converters.
Since practical operation can be acheived with a clock speed in excess of
40 MHz, the circuit layout is critical and does not lend itself to classic
breadboarding techniques. In fact, proper operation requires use of surface-
mount components.
1.2 Power Supply Requirements
The TLC5540/TLC5510/TLC5510A EVM is designed to be powered by
regulated lab power supplies. Three lab supplies are required for the best
performance.
Table 1–1. Power Supplies
If Amp Used By-pass Amp
Connector Supply
TLC5540/5510/
5510A
TLC5510/
5540/5510A
J2 Positive analog supply 5 V
±
10% 5 V
±
10%
J3 Negative analog supply –5 V
±
10% N/A
J8 Digital supply 5 V
±
10% 5 V
±
10%
The 5 V and –5 V analog supplies share an analog ground plane. The digital
supply uses an isolated ground plane.
The two ground planes can be easily connected by soldering jumpers from
E21 to E22 or from E13 to E14. This allows the user to adapt the EVM to
various grounding conditions that can exist in an evaluation circuit interface.