TLC27L2ACDR datasheet(13/48 Pages) TI

13 / 48 page

TLC27L2, TLC27L2A, TLC27L2B, TLC27L7

LinCMOS PRECISION DUAL OPERATIONAL AMPLIFIERS

SLOS052D − OCTOBER 1987 − REVISED OCTOBER 2005

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

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 in Figure 1. The use

of either circuit gives the same result.

VDD −

VDD +

VDD

(a) SINGLE SUPPLY

(b) SPLIT SUPPLY

Figure 1. Unity-Gain Amplifier

2 k

Ω

VDD −

Ω

2 k

Ω

1/2 VDD

VDD +

VDD

(b) SPLIT SUPPLY

(a) SINGLE SUPPLY

Figure 2. Noise-Test Circuit

VDD −

VDD +

10 k

Ω

100

Ω

1/2 VDD

100

Ω

10 k

Ω

VDD

(a) SINGLE SUPPLY

(b) SPLIT SUPPLY

Figure 3. Gain-of-100 Inverting Amplifier

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