參數(shù)資料
型號(hào)： TLC32047IFN
廠商： Texas Instruments, Inc.
英文描述： Wide-Band Analog Interface Circuit
中文描述： 寬帶模擬接口電路
文件頁(yè)數(shù)： 29/61頁(yè)
文件大?。?/td> 303K
代理商： TLC32047IFN
2–11
VCC+
RESET
VCC–
200 k
5 V
0.5
μ
F
– 5 V
TLC32047
Figure 2–3. Reset on Power-Up Circuit
2.17 Power-Up Sequence
To ensure proper operation of the AIC and as a safeguard against latch-up, it is recommended that Schottky
diodes with forward voltages less than or equal to 0.4 V be connected from V
CC–
to ANLG GND and from
V
CC–
to DGTL GND. In the absence of such diodes, power is applied in the following sequence: ANLG GND
and DGTL GND, V
CC–
, then V
CC+
and V
DD
. Also, no input signal is applied until after power-up.
2.18 AIC Register Constraints
The following constraints are placed on the contents of the AIC registers:
1. TA register must be
≥
4 in word mode (WORD/BYTE= High).
2. TA register must be
≥
5 in byte mode (WORD/BYTE= Low).
3. TA
′
register can be either positive, negative, or zero.
4. RA register must be
≥
4 in word mode (WORD/BYTE = High).
5. RA register must be
≥
5 in byte mode (WORD/BYTE = Low).
6. RA
′
register can be either positive, negative, or zero.
7. (TA register
±
TA
′
register) must be > 1.
8. (RA register
±
RA
′
register) must be > 1.
9. TB register must be
≥
15.
10. RB register must be
≥
15.
2.19 AIC Responses to Improper Conditions
The AIC has provisions for responding to improper conditions. These improper conditions and the response
of the AIC to these conditions are presented in Table 2–4. The general procedure for correcting any improper
operation is to apply a reset and reprogram the registers to the proper value.
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