TLC27M4_15 Datasheet, PDF (17/52 Pages) Texas Instruments – PRECISION QUAD OPERATIONAL AMPLIFIERS

TLC27M4, TLC27M4A, TLC27M4B, TLC27M4Y, TLC27M9
www.ti.com
SLOS093D – OCTOBER 1987 – REVISED OCTOBER 2012
PARAMETER MEASUREMENT INFORMATION
Single-Supply versus Split-Supply Test Circuits
Because the TLC27M4 and TLC27M9 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.
V_DD
V_I
C_L
V_O
R_L
V_DD+
V_I
C_L
V_O
R_L
(a) SINGLE SUPPLY
V_{DD –}
(b) SPLIT SUPPLY
Figure 1. Unity-Gain Amplifier
2 kΩ
2 kΩ
20 Ω
V_DD
–
1/2 V_DD
V_O
20 Ω
(a) SINGLE SUPPLY
V _DD+
V_O
20 Ω
20 Ω
V_{DD –}
(b) SPLIT SUPPLY
Figure 2. Noise-Test Circuit
100 Ω
V_I
1/2 V_DD
10 kΩ
V_DD
(a) SINGLE SUPPLY
V_O
C_L
100 Ω
V_I
10 kΩ
V_DD+
V_{DD –}
(b) SPLIT SUPPLY
V_O
C_L
Figure 3. Gain-of-100 Inverting Amplifier
Copyright © 1987–2012, Texas Instruments Incorporated
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