The DS1870 is a dual-channel bias controller targeted
toward class AB LDMOS RF power-amplifier applications.
It uses lookup tables (LUTs) to control 256-position
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 compensation
schemes that are not possible with conventional
biasing solutions.
Key Features
Applications/Uses
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
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-2 of 2
DS1870
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Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS1870E-010
Active
TSSOP;16 pin;33 mm²
Outline Drawing: 21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16-1*
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