Datasheet
SLOS052D − OCTOBER 1987 − REVISED OCTOBER 2005
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
single-supply versus split-supply test circuits
Because the TLC27L2 and TLC27L7 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 in Figure 1. The use
of either circuit gives the same result.
V
DD−
V
DD+
−
+
C
L
R
L
V
O
V
I
V
I
V
O
R
L
C
L
V
DD
−
+
(a) SINGLE SUPPLY (b) SPLIT SUPPLY
Figure 1. Unity-Gain Amplifier
V
O
2 kΩ
20 Ω20 Ω
V
DD−
20 Ω
2 kΩ
V
O
20 Ω
1/2 V
DD
−
+
V
DD+
−
+
V
DD
(b) SPLIT SUPPLY(a) SINGLE SUPPLY
Figure 2. Noise-Test Circuit
V
DD−
V
DD+
−
+
10 kΩ
V
O
100 Ω
C
L
V
I
V
I
1/2 V
DD
C
L
100 Ω
V
O
10 kΩ
−
+
V
DD
(a) SINGLE SUPPLY (b) SPLIT SUPPLY
Figure 3. Gain-of-100 Inverting Amplifier