TSV629X datasheet(15/25 Pages) STMICROELECTRONICS

15 / 25 page

TSV629x, TSV629xA

Application information

Doc ID 16882 Rev 2

15/25

4.6

Driving resistive and capacitive loads

These products are micropower, low-voltage operational amplifiers optimized to drive rather

large resistive loads, above 5 k

Ω. For lower resistive loads, the THD level may significantly

increase.

The amplifiers have a relatively low internal compensation capacitor, making them very fast

while consuming very little. They are ideal when used in a non-inverting configuration or in

an inverting configuration in the following conditions:

●

IGainI

≥ 3 in an inverting configuration (C

L = 20 pF, RL = 100 kΩ) or IgainI

≥ 10

(CL = 100 pF, RL = 100 kΩ)

●

Gain

≥ +4 in a non-inverting configuration (C

L = 20 pF, RL = 100kΩ) or gain

≥ +11

(CL = 100 pF, RL= 100 kΩ)

As these operational amplifiers are not unity gain stable, the TSV62x (29 µA, 420 kHz) or

TSV63x (60 µA, 880 kHz) – which are unity gain stable – might be a solution for your

application.

4.7

PCB layouts

For correct operation, it is advised to add 10 nF decoupling capacitors as close as possible

to the power supply pins.

4.8

Macromodel

Two accurate macromodels (with or without shutdown feature) of the TSV629x are available

on STMicroelectronics’ web site at www.st.com. This model is a trade-off between accuracy

and complexity (that is, time simulation) of the TSV629x operational amplifiers. It emulates

the nominal performances of a typical device within the specified operating conditions

mentioned in the datasheet. It also helps to validate a design approach and to select the

right operational amplifier, but it does not replace on-board measurements.

Table 9.

TSV629X bảng dữ liệu(PDF) 15 Page - STMicroelectronics