DS1870(2004) 데이터 시트보기 (PDF) - Maxim Integrated
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DS1870 Datasheet PDF : 28 Pages
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Rev 1; 5/04
LDMOS RF Power-Amplifier Bias
Controller
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
I2C is a trademark of Philips Corp. Purchase of I2C compo-
nents of Maxim Integrated Products, Inc., or one of its subli-
censed Associated Companies, conveys a license under the
Philips I2C Patent Rights to use these components in an I2C
system, provided that the system conforms to the I2C Standard
Specification as defined by Philips.
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
Ordering Information
PART
DS1870E-010
TEMP RANGE
-40°C to +95°C
PIN-PACKAGE
16 TSSOP
(173 mil)
Typical Operating Circuit appears at end of data sheet.
Pin Configuration
TOP VIEW
1
L1
2
W1
3
W2
4
L2
5
ID1
6
ID2
7
VD
8
GND
DS1870
VCC
16
HCOM
15
SDA 14
SCL 13
A2
12
A1
11
A0
10
FAULT 9
TSSOP (173 mil)
______________________________________________ Maxim Integrated Products 1
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.
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