MAX1386

更新时间： 2024-09-14 05:49:03

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
52页	502K
描述
Dual RF LDMOS Bias Controllers with I2C/SPI Interface

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MAX1386 数据手册

19-4456; Rev 0; 2/09

Dual RF LDMOS Bias Controllers

with I C/SPI Interface

5/MAX1386

General Description

Features

The MAX1385/MAX1386 set and control bias conditions

for dual RF LDMOS power devices found in cellular

base stations. Each device includes a high-side cur-

rent-sense amplifier with programmable gains of 2, 10,

and 25 to monitor LDMOS drain current over the 20mA

to 5A range. Two external diode-connected transistors

monitor LDMOS temperatures while an internal temper-

ature sensor measures the local die temperature of the

MAX1385/MAX1386. A 12-bit ADC converts the pro-

grammable-gain amplifier (PGA) outputs, external/inter-

nal temperature readings, and two auxiliary inputs.

♦ Integrated High-Side Drain Current-Sense PGA

with Gain of 2, 10, or 25

♦

0.5ꢀ Accuracy for Sense ꢁoltage ꢂetween ꢃ5mꢁ

and 250mꢁ

♦ Full-Scale Sense ꢁoltage of 100mꢁ with Gain of 25

♦ Full-Scale Sense ꢁoltage of 250mꢁ with Gain of 10

♦ Common-Mode Range of 5ꢁ to 30ꢁ Drain ꢁoltage

for LDMOS

♦ Adjustable Low Noise 0 to 5ꢁ, 0 to 10ꢁ Output

The two gate-drive channels, each consisting of 8-bit

coarse and 10-bit fine DACs and a gate-drive amplifier,

generate a positive gate voltage to bias the LDMOS

devices. The MAX1385 includes a gate-drive amplifier

with a gain of 2 and the MAX1386 gate-drive amplifier

provides a gain of 4. The 8-bit coarse and 10-bit fine

DACs allow up to 18 bits of resolution. The MAX1385/

MAX1386 include autocalibration features to minimize

error over time, temperature, and supply voltage.

Gate-ꢂias ꢁoltage Ranges with 10mA Gate Drive

♦ Fast Clamp to 0ꢁ for LDMOS Protection

♦ 8-ꢂit DAC Control of Gate-ꢂias ꢁoltage

♦ 10-ꢂit DAC Control of Gate-ꢂias Offset with

Temperature

♦ Internal Die Temperature Measurement

The MAX1385/MAX1386 feature an I²C/SPI™-compatible

serial interface. Both devices operate from a 4.75V to

5.25V analog supply (3.2mA supply current), a 2.7V to

5.25V digital supply (3.1mA supply current), and a 4.75V

to 11.0V gate-drive supply (4.5mA supply current). The

MAX1385/MAX1386 are available in a 48-pin thin QFN

package.

♦ External Temperature Measurement by Diode-

Connected Transistor (2N3904)

♦ Internal 12-ꢂit ADC Measurement of Temperature,

Current, and ꢁoltages

♦ Selectable I²C-/SPI-Compatible Serial Interface

400kHz/1.ꢃMHz/3.4MHz I²C-Compatible Control

for Settings and Data Measurement

16MHz SPI-Compatible Control for Settings

and Data Measurement

Applications

RF LDMOS Bias Control in Cellular Base Stations

♦ Internal 2.5ꢁ Reference

Industrial Process Control

♦ Three Address Inputs to Control Eight Devices in

I²C Mode

Ordering Information/Selector Guide

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

48 Thin QFN-EP*

TEMP ERROR (°C)

ꢁ

(ꢁ)

GATE

MAX1385AETM+**

MAX1385BETM+

MAX1386AETM+**

MAX1386BETM+**

*EP = Exposed pad.

**Future product—contact factory for availability.

+Denotes a lead(Pb)-free/RoHS-compliant package.

Pin Configuration and Typical Operating Circuit (I C Mode)

appear at end of data sheet.

SPI is a trademark of Motorola, Inc.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...52

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与MAX1386相关器件

型号	品牌	获取价格	描述	数据表
MAX1386AETM+	MAXIM	获取价格	Dual RF LDMOS Bias Controllers with I2C/SPI Interface
MAX1386BETM+	MAXIM	获取价格	Dual RF LDMOS Bias Controllers with I2C/SPI Interface
MAX138C/D	MAXIM	获取价格	3Digit A/D Converters with Bandgap Refrence
MAX138CMH	MAXIM	获取价格	3Digit A/D Converters with Bandgap Refrence
MAX138CMH+	MAXIM	获取价格	ADC, Dual-Slope, 24-Bit, 1 Func, 1 Channel, Parallel, Word Access, CMOS, PQFP44, MQFP-44
MAX138CMH+D	MAXIM	获取价格	暂无描述
MAX138CMH+T	MAXIM	获取价格	ADC, Dual-Slope, 24-Bit, 1 Func, 1 Channel, Parallel, Word Access, CMOS, PQFP44, MQFP-44
MAX138CMH+TD	MAXIM	获取价格	ADC, Dual-Slope, 1 Func, 1 Channel, PQFP44, LEAD FREE, MQFP-44
MAX138CMH-D	MAXIM	获取价格	ADC, Dual-Slope, 1 Func, 1 Channel, PQFP44, MQFP-44
MAX138CMH-TD	MAXIM	获取价格	暂无描述

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