TPL8002-25 - TANDEM 64-TAP 数字分压器

TPL8002-25是TI德州仪器公司的一款数字分压器产品，TPL8002-25是TANDEM 64-TAP 数字分压器，本站介绍了TPL8002-25的封装应用图解、特点和优点、功能等，并给出了与TPL8002-25相关的TI元器件型号供参考。

TPL8002-25 - TANDEM 64-TAP 数字分压器 - 数字分压器 - 数模转换器 - 德州仪器

产品描述

产品特性

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.

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