AMC7834IRTQT集成电路（IC）的ADC/DAC-特殊用途规格书PDF中文资料

AMC7834IRTQT属于集成电路（IC）的ADC/DAC-特殊用途。由德州仪器制造生产的AMC7834IRTQTADC/DAC - 特殊用途该产品族中的产品可用于模拟和数字表示的信息转换，适用于特定用例，或集成了通用数据转换器中不常见的其他功能。例如针对超声或汽车雷达应用集成了低噪声放大器和可变增益级的器件、注重音频和视频的产品、在段码式显示器上集成显示测量值功能的器件、集成输入输出电气隔离的器件等。

1 Features

1• Eight Monotonic 12-bit DACs With Programmable

Ranges

– Four Bipolar DACs:

–4 to 1 V, –5 to 0 V, and 0 to 5 V

– Four Unipolar DACs:

0 to 5 V, and 2.5 to 7.5 V

– High Current Drive Capability: up to ±10 mA

– Selectable Clamp Voltage

• Multi-Channel 12-bit SAR ADC

– Four External Analog Inputs: 0 to 2.5 V Range

– Four Internal Inputs for Bipolar DAC Monitoring

– Programmable Out-of-Range Alarms

• Four High-Side Current-Sense Amplifiers

– Common Mode Voltages: 4 to 60 V

– Optional Closed-Loop Drain-Current Controller

Operation

• Temperature Sensing Capabilities

– Internal Temperature Sensor

– Two Remote Temperature-Diode Drivers

• Internal 2.5 V Reference

• Four General-Purpose I/O Ports (GPIOs)

• Low-Power SPI-Compatible Serial Interface

– 4-Wire Mode, 1.7 to 3.6 V Operation

• Operating Temperature Range: –40°C to +125°C

• Available in a 56-Pin VQFN Package

2 Applications

• Communications Infrastructure:

– Cellular Base Stations

– Microwave Backhaul

– Optical Networks

• General-Purpose Monitor and Control

• Data Acquisition Systems

3 Description

The AMC7834 device is a highly-integrated, lowpower,

analog monitoring and control solution for

power-amplifier (PA) biasing capable of temperature,

current and voltage supervision.

The device integrates a multi-channel, 12-bit analogto-

digital converter (ADC); eight, 12-bit digital-toanalog

converters (DAC); four high-side currentsense

amplifiers that can be optionally set to operate

as part of four independent closed-loop drain-current

controllers; an accurate on-chip temperature sensor

and two remote temperature-sensor diode drivers;

four configurable general-purpose I/O ports (GPIOs);

and an accurate internal reference. The high level of

integration significantly reduces component count and

simplifies PA-biasing system designs.

The function integration and wide operatingtemperature

range of the device make it suitable as

an all-in-one, low-cost, bias control-circuit for PAs

found in multi-channel RF communication systems.

The flexible DAC output ranges and wide common

mode voltage current sensors allow the device to be

used as a biasing solution for a large variety of

transistor technologies such as LDMOS, GaAs, and

GaN. The AMC7834 feature set is similarly beneficial

in general-purpose monitor and control systems.

For applications that require a different channelcount,

additional features, or converter resolutions,

Texas Instruments offers a complete family of analog

monitor and control (AMC) products. For more

information, go to www.ti.com/amc.