TPL8002-25PWR集成电路（IC）的数字电位计规格书PDF中文资料

TPL8002-25PWR属于集成电路（IC）的数字电位计。由德州仪器制造生产的TPL8002-25PWR数字电位计数字电位器是一系列集成电路器件，可提供类似于传统机械电位器或变阻器的可调节电阻，但通过电子信号而非机械输入来进行控制。虽然这些器件的电阻可耗散的电能相对有限，但其电子控制能力有助于小型化、自动化和远程控制信号级模拟电路，而这些电路本来可能会使用机械电位器。

1FEATURES

• Adjustable Gain From 23.25 dB to –24 dB

• 64-Tap Positions With 0.75 dB Per Step

• Supports 8-MHz Analog Bandwidth

• Operating Range up to –4-V VEE/+4-V VDD

• 100-μA Maximum Static Supply Current

• ±30% End-to-End Resistance Tolerance

• Absolute Tolerance of ±0.3 dB

• Operating Temperature Range From

–40°C to 85°C

• ESD Performance Tested Per JESD 22

– 2000-V Human-Body Model

(A114-B,Class II)

APPLICATIONS

• Tandem Adjustable Feedback and Gain

Resistors for Operational Amplifers

DESCRIPTION/ORDERING INFORMATION

The TPL8002-25 is a programmable resistor device implementing two digital potentiometers with 64 wiper

positions each that are tandem controlled through a 6-bit parallel interface. The device has fixed wiper

resistances at the respective wiper contacts that tap the potentiometer resistors at a point determined by the

binary code present at its digital inputs.

The resistive wiper tap terminals, RSW, of the TPL8002-25 are typically connected to the inverting inputs (–) of

an external differential path inverting operational amplifier configuration, with the non-inverting inputs (+)

connected through to ground. The application's differential input to the configuration is the device's RG terminals.

The differential output of the external operational amplifiers is connected to the device's RF terminals, and thus

becomes the differential output of the application configuration.

The resistance between the wiper contacts and the end points RG and RF of the TPL8002-25 provides a

logarithmic gain/attenuation response of the configuration. With a digital code of decimal 0 (b000000) the

configuration has an inverting maximum attenuation of –24 dB. With a digital code of decimal 32 (b100000) the

configuration has inverting unity gain of 0.00 dB. With a digital code of decimal 63 (b111111) the configuration

has an inverting maximum gain of +23.25 dB. The response of the configuration with respect to the digital code

varies in fixed steps of 0.75 dB.