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DS1870E-010 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1870E-010 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 28 page General Description The DS1870 is a dual-channel bias controller targeted toward class AB LDMOS RF power-amplifier applica- tions. It uses lookup tables (LUTs) to control 256-posi- tion potentiometers based on the amplifier’s temperature and drain voltage or current (or other external monitored signal). With its internal temperature sensor and multichannel A/D converter (ADC), the DS1870 provides a cost-effective solution that improves the amplifier’s efficiency by using nonlinear compensa- tion schemes that are not possible with conventional biasing solutions. Applications Cellular Base Stations Medical Equipment Industrial Controls Optical Transceivers Features ♦ Two-Channel Solution for Programmable RF Bias Control ♦ The Potentiometer’s Position is Automatically Updated to Compensate for the Ambient Temperature and the Drain Voltage or Current ♦ A Five-Channel, 13-Bit ADC Continuously Monitors the Ambient Temperature, VCC, VD, ID1, and ID2 ♦ Hi/Lo Alarms for Each ADC Channel can Trigger a Fault Output ♦ Nonvolatile Memory for the Device Settings, Lookup Tables, and 32-Bytes of User Memory ♦ I2C*-Compatible Serial Interface with Up to Eight Devices on the Same Serial Bus ♦ Single 5V Power Supply ♦ Small 16-Pin TSSOP Package ♦ -40°C to +95°C Operational Temperature Range LDMOS RF Power-Amplifier Bias Controller ______________________________________________ Maxim Integrated Products 1 TSSOP (173 mils) 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 L1 TOP VIEW W1 W2 L2 ID1 ID2 VD GND FAULT A0 A1 A2 SCL SDA HCOM VCC DS1870 Pin Configuration Ordering Information Rev 2; 2/06 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE PART TEMP RANGE PIN-PACKAGE DS1870E-010 -40°C to +95°C 16 TSSOP (173 mils) DS1870E-010+ -40°C to +95°C 16 TSSOP (173 mils) + Denotes lead-free package. Typical Operating Circuit appears at end of data sheet. *Purchase of I2C components of Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these com- ponents in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. |
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