AMC7834IRTQT.A中文资料德州仪器数据手册PDF规格书

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.