DS1870
LDMOS RF Power-Amplifier Bias Controller
Industry's First Integrated LDMOS Power-Amplifier Controller Monitor
Part Details
- 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
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.
Applications
- Cellular Base Stations
- Industrial Controls
- Medical Equipment
- Optical Transceivers
Documentation
Data Sheet 1
Reliability Data 1
Design Note 5
Technical Articles 1
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Digital Potentiometers (DigiPOT) 3 | ||
| DS1845 | NOT RECOMMENDED FOR NEW DESIGNS | Dual NV Potentiometer and Memory |
| DS1847 | NOT RECOMMENDED FOR NEW DESIGNS | Dual Temperature-Controlled NV Variable Resistor |
| DS1855 | NOT RECOMMENDED FOR NEW DESIGNS | Dual Nonvolatile Digital Potentiometer and Secure Memory |
| Fiber Monitoring and Control 1 | ||
| DS1859 | NOT RECOMMENDED FOR NEW DESIGNS | Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors |
| Precision Resistor Network 2 | ||
| DS1848 | NOT RECOMMENDED FOR NEW DESIGNS | Dual Temperature-Controlled NV Variable Resistor & Memory |
| DS1858 | NOT RECOMMENDED FOR NEW DESIGNS | Dual Temperature-Controlled Resistors with Three Monitors |
| Product 1 | ||
| DS1852 | Optical Transceiver Diagnostic Monitor | |
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