TLC27L4IDR Datasheet, PDF (17/44 Pages) Texas Instruments – LinCMOSE PRECISION QUAD OPERATIONAL AMPLIFIERS

TLC27L4, TLC27L4A, TLC27L4B, TLC27L4Y, TLC27L9
LinCMOS™ PRECISION QUAD OPERATIONAL AMPLIFIERS
SLOS053C – OCTOBER 1987 – REVISED AUGUST 1994
PARAMETER MEASUREMENT INFORMATION
single-supply versus split-supply test circuits
Because the TLC27L4 and TLC27L9 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
VDD ₊
VO
VO
VI
CL
RL
VI
CL
RL
(a) SINGLE SUPPLY
VDD _–
(b) SPLIT SUPPLY
Figure 1. Unity-Gain Amplifier
2 kΩ
2 kΩ
20 Ω
VDD
1/2 VDD
VO
20 Ω
(a) SINGLE SUPPLY
VDD ₊
VO
20 Ω
20 Ω
VDD _–
(b) SPLIT SUPPLY
Figure 2. Noise-Test Circuit
VI ^{100 Ω}
1/2 VDD
10 kΩ
VDD
VO
CL
100 Ω
VI
10 kΩ
VDD ₊
(a) SINGLE SUPPLY
VDD _–
(b) SPLIT SUPPLY
Figure 3. Gain-of-100 Inverting Amplifier
VO
CL
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