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DS1870
LDMOS RF Power-Amplifier Bias Controller
Industry's First Integrated LDMOS Power-Amplifier Controller Monitor
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Status
Active: In Production.
Description
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.
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Data Sheet
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Key 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
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Applications/Uses
- Cellular Base Stations
- Industrial Controls
- Medical Equipment
- Optical Transceivers
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Key Specifications:
| Digital Potentiometers |
| Part Number |
Taper |
POTs |
Control Interface |
Wiper Memory |
Steps |
REND-TO-END
(kΩ) |
Res. Tol.
(%) |
Temp. Coeff.
(ppm/°C) |
Wiper Resistance
(Ω) |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| typ |
typ |
max w/pins |
See Notes |
| DS1870 |
Linear |
2 |
2-Wire |
Non-Volatile |
256 |
50 |
20 |
850 |
400 |
33.4 |
$4.02 @1k |
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See All Digital Potentiometers (129)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS1870E-010
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Active |
TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS1870E-010+
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Active |
TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * 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.
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More Information
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Information Index
Rev 2;
2006-02-28
This page last modified: 2010-05-19
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