TLV2341IP datasheet(46/53 Pages) TI2

46 / 53 page

TLV2341, TLV2341Y

LinCMOS

™ PROGRAMMABLE LOW-VOLTAGE

OPERATIONAL AMPLIFIERS

SLOS110A – MAY 1992 – REVISED AUGUST 1994

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

APPLICATION INFORMATION

single-supply operation (continued)

The TLV2341 works well in conjunction with digital logic; however, when powering both linear devices and digital

logic from the same power supply, the following precautions are recommended:

• Power the linear devices from separate bypassed supply lines (see Figure 98); otherwise, the linear

device supply rails can fluctuate due to voltage drops caused by high switching currents in the digital

logic.

• Use proper bypass techniques to reduce the probability of noise-induced errors. Single capacitive

decoupling is often adequate; however, RC decoupling may be necessary in high-frequency

applications.

–

Logic

Power

Supply

–

Logic

Power

Supply

(a) COMMON-SUPPLY RAILS

(b) SEPARATE-BYPASSED SUPPLY RAILS (preferred)

Figure 98. Common Versus Separate Supply Rails

input offset voltage nulling

The TLV2341 offers external input offset null control. Nulling of the input offset voltage can be achieved by

adjusting a 25-k

Ω potentiometer connected between the offset null terminals with the wiper connected as shown

in Figure 99. The amount of nulling range varies with the bias selection. In the high-bias mode, the nulling range

allows the maximum offset voltage specified to be trimmed to zero. In low-bias and medium-bias modes, total

nulling may not be possible.

VDD

25 k

Ω

–

25 k

Ω

–

(a) SINGLE SUPPLY

(b) SPLIT SUPPLY

GND

Figure 99. Input Offset Voltage Null Circuit

TLV2341IP 数据表(PDF) 46 Page - Texas Instruments

TLV2341IP 数据表(HTML) 46 Page - Texas Instruments

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