Datasheet

TLC271, TLC271A, TLC271B
LinCMOS PROGRAMMABLE LOW-POWER
OPERATIONAL AMPLIFIERS
SLOS090D – NOVEMBER 1987 – REVISED MARCH 2001
67
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION (MEDIUM-BIAS MODE)
SELECT
BIAS
2.5 V
100 kΩ
1 µF
100 kΩ
100 kΩ
Gain Control
1 MΩ
1 kΩ
10 kΩ
5 V
1 µF
(see Note A)
–
+
TLC271
NOTE A: Low to medium impedance dynamic mike
– +
– +
0.1 µF
+ –
Figure 122. Microphone Preamplifier
SELECT
BIAS
V
DD
/2
V
DD
10 MΩ
V
O
V
REF
150 pF
100 kΩ
15 nF
SELECT
BIAS
V
DD
/2
V
DD
1 kΩ
–
+
TLC271
–
+
TLC271
NOTES: A. NOTES: V
DD
= 4 V to 15 V
B. V
ref
= 0 V to V
DD
–2 V
Figure 123. Photo-Diode Amplifier With Ambient Light Rejection
–
+
TLC271
2N3821
I
S
5 V
2.5 V
BIAS
SELECT
R
V
I
I
S
V
I
R
NOTES: A. V
I
= 0 V TO 3 V
B.
Figure 124. Precision Low-Current Sink