TLC27L2 Datasheet, PDF (13/33 Pages) Texas Instruments – LinCMOSE PRECISION DUAL OPERATIONAL AMPLIFIERS

TLC27L2, TLC27L2A, TLC27L2B, TLC27L7
LinCMOS™ PRECISION DUAL OPERATIONAL AMPLIFIERS
SLOS052B – OCTOBER 1987 – REVISED AUGUST 1994
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 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
20 Ω
VDD
1/2 VDD
VO
VDD ₊
VO
20 Ω
(a) SINGLE SUPPLY
20 Ω
20 Ω
VDD _–
(b) SPLIT SUPPLY
Figure 2. Noise-Test Circuit
100 Ω
VI
1/2 VDD
10 kΩ
VDD
VO
CL
100 Ω
VI
10 kΩ
VDD ₊
VDD _–
(a) SINGLE SUPPLY
(b) SPLIT SUPPLY
Figure 3. Gain-of-100 Inverting Amplifier
VO
CL
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