TLC271_01 Datasheet, PDF (54/82 Pages) Texas Instruments – LinCMOSE PROGRAMMABLE LOW-POWER OPERATIONAL AMPLIFIERS

TLC271, TLC271A, TLC271B
LinCMOS PROGRAMMABLE LOW-POWER
OPERATIONAL AMPLIFIERS
SLOS090D – NOVEMBER 1987 – REVISED MARCH 2001
PARAMETER MEASUREMENT INFORMATION
single-supply versus split-supply test circuits
Because the TLC271 is 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
2 kΩ
VDD _–
(b) SPLIT SUPPLY
Figure 98. Unity-Gain Amplifier
2 kΩ
1/2 VDD
20 Ω
20 Ω
VDD
(a) SINGLE SUPPLY
10 kΩ
VDD ₊
VO
20 Ω
Figure 99. Noise-Test Circuit
20 Ω
VDD _–
(b) SPLIT SUPPLY
10 kΩ
VI
1/2 VDD
100 Ω
VDD
VO
CL
100 Ω
VI
VDD ₊
(a) SINGLE SUPPLY
VDD _–
(b) SPLIT SUPPLY
Figure 100. Gain-of-100 Inverting Amplifier
VO
VO
CL
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