Datasheet

TLC27M4, TLC27M4A, TLC27M4B, TLC27M4Y, TLC27M9
LinCMOS PRECISION QUAD OPERATIONAL AMPLIFIERS
SLOS093C – OCTOBER 1987 – REVISED MAY 1999
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
single-supply versus split-supply test circuits
Because the TLC27M4 and TLC27M9 are optimized for single-supply operation, circuit configurations used for
the various tests often present some inconvenience since the input signal, in many cases, must be offset from
ground. This inconvenience can be avoided by testing the device with split supplies and the output load tied to
the negative rail. A comparison of single-supply versus split-supply test circuits is shown below. The use of either
circuit gives the same result.
–
+
V
DD
C
L
R
L
V
O
V
I
V
I
V
O
R
L
C
L
–
+
V
DD+
V
DD–
(a) SINGLE SUPPLY (b) SPLIT SUPPLY
Figure 1. Unity-Gain Amplifier
V
DD
–
+
V
DD+
–
+
1/2 V
DD
20 Ω
V
O
2 kΩ
20 Ω
V
DD–
20 Ω 20 Ω
2 kΩ
V
O
(b) SPLIT SUPPLY(a) SINGLE SUPPLY
Figure 2. Noise-Test Circuit
V
DD
–
+
10 kΩ
V
O
100 Ω
C
L
1/2 V
DD
V
I
V
I
C
L
100 Ω
V
O
10 kΩ
–
+
V
DD+
V
DD–
(b) SPLIT SUPPLY(a) SINGLE SUPPLY
Figure 3. Gain-of-100 Inverting Amplifier