TLC254 Datasheet, PDF (16/21 Pages) Texas Instruments – LinCMOSE QUAD OPERATIONAL AMPLIFIERS

TLC254, TLC254A, TLC254B, TLC254Y, TLC25L4, TLC25L4A, TLC25L4B
TLC25L4Y, TLC25M4, TLC25M4A, TLC25M4B, TLC25M4Y
LinCMOS™ QUAD OPERATIONAL AMPLIFIERS
SLOS003F – JUNE 1983 – REVISED AUGUST 1994
PARAMETER MEASUREMENT INFORMATION
single-supply versus split-supply test circuits
Because the TLC25_4, TLC25_4A, and TLC25_4B 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.
VDD
–
VI
+
CL
VO
RL
VDD ₊
–
VI
+
CL
VO
RL
(a) SINGLE-SUPPLY
VDD _–
(b) SPLIT-SUPPLY
Figure 1. Unity-Gain Amplifier
2 kΩ
2 kΩ
VDD
20 Ω
1/2 VDD
–
+
VO
20 Ω
VDD ₊
–
+
VO
20 Ω
20 Ω
(a) SINGLE-SUPPLY
Figure 2. Noise-Test Circuit
10 kΩ
VDD _–
(b) SPLIT-SUPPLY
10 kΩ
VI
1/2 VDD
100 Ω
VDD
–
+
VO
CL
100 Ω
VI
VDD ₊
–
+
VO
CL
(a) SINGLE-SUPPLY
Figure 3. Gain-of-100 Inverting Amplifier
VDD _–
(b) SPLIT-SUPPLY
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