Datasheet > AD7294BSUZRL

AD7294BSUZRL

更新时间： 2024-02-27 11:25:44

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
48页	1341K
描述
12-Bit Monitor and Control System with Multichannel

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AD7294BSUZRL 数据手册

12-Bit Monitor and Control System with Multichannel

ADC, DACs, Temperature Sensor, and Current Sense

Data Sheet

AD7294

FEATURES

APPLICATIONS

12-bit SAR ADC with 3 μs conversion time

4 uncommitted analog inputs

Differential/single-ended

Cellular base stations

GSM, EDGE, UMTS, CDMA, TD-SCDMA, W-CDMA, WiMAX

Point-to-multipoint and other RF transmission systems

12 V, 24 V, 48 V automotive applications

Industrial controls

V_REF, 2 × V_REFinput ranges

2 high-side current sense inputs

5 V to 59.4 V operating range

0.5% max gain error

GENERAL DESCRIPTION

The AD7294 contains all the functions required for general-

purpose monitoring and control of current, voltage, and

temperature integrated into a single-chip solution. The device

includes low voltage ( 200 mV) analog input sense amplifiers

for current monitoring across shunt resistors, temperature sense

inputs, and four uncommitted analog input channels multiplexed

into a SAR analog-to-digital converter (ADC) with a 3 μs conver-

sion time. A high accuracy internal reference is provided to drive

both the digital-to-analog converter (DAC) and ADC. Four 12-bit

DACs provide the outputs for voltage control. The AD7294 also

includes limit registers for alarm functions. The device is designed

on Analog Devices, Inc., high voltage DMOS process for high

voltage compliance, 59.4 V on the current sense inputs, and up

to a 15 V DAC output voltage.

200 mV input range

2 external diode temperature sensor inputs

−55°C to +150°C measurement range

2°C accuracy

Series resistance cancellation

1 internal temperature sensor

2°C accuracy

Built-in monitoring features

Minimum/maximum recorder for each channel

Programmable alert thresholds

Programmable hysteresis

Four 12-bit monotonic 15 V DACs

5 V span, 0 V to 10 V offset

8 μs settling time

10 mA sink and source capability

Power-on resets (POR) to 0 V

Internal 2.5 V reference

2-wire fast mode I²C interface

Temperature range: −40°C to +105°C

Package type: 64-lead TQFP or 56-lead LFCSP

The AD7294 is a highly integrated solution that offers all the

functionality necessary for precise control of the power amplifier

in cellular base station applications. In these types of applications,

the DACs provide 12-bit resolution to control the bias currents

of the power transistors. Thermal diode-based temperature sensors

are incorporated to compensate for temperature effects. The ADC

monitors the high-side current and temperature. All this function-

ality is provided in a 64-lead TQFP or a 56-lead LFCSP operating

over a temperature range of −40°C to +105°C.

Rev. I

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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