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DS1841
Temperature-Controlled, NV, I²C, Logarithmic Resistor
Industry's Only Temperature-Compensated Resistor Optimized for APD Bias in Fiber Optic Modules
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Status
Active: In Production.
Description
The DS1841 is a 7-bit, logarithmic, nonvolatile (NV) digital resistor that features an on-chip temperature sensor and associated analog-to-digital converter (ADC). The integrated temperature sensor indexes a 72-byte NV lookup table (LUT) encompassing a temperature range from -40°C to +100°C. The LUT output can drive the resistor directly or be added to an NV initial-value register (IVR) to drive the resistor. This flexible LUT-based architecture allows the DS1841 to provide a temperature-compensated resistor output with arbitrary slope. Programming is accomplished by an I²C-compatible interface, which can operate at speeds of up to 400kHz.
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Data Sheet
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Key Features
- 22kΩ to 3.7kΩ Adjustable Logarithmic Resistor with a 3.6kΩ Fixed Resistor
- 128 Wiper Tap Points
- On-Chip Temperature Sensor and ADC
- 72-Byte Lookup Table (LUT)
- I²C-Compatible Serial Interface
- Address Pins Allow Up to Four DS1841s to Share the Same I²C Bus
- Digital Supply of 2.7V to 5.5V
- -40°C to +100°C Operating Range
- 3mm x 3mm, 10-Pin TDFN Package
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Applications/Uses
- Instrumentation and Industrial Controls
- Linear and Nonlinear Compensation
- Mechanical Potentiometer Replacement
- 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) |
ICC @5V
(µA) |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| typ |
typ |
max |
max w/pins |
See Notes |
| DS1841 |
Log |
1 |
I2C |
Non-Volatile |
128 |
22 |
20 |
250 |
370 |
1 |
9.6 |
$0.57 @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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| DS1841N+
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Active |
TDFN-EP;10 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0003 (PDF)
Use pkgcode/variation: T1033+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS1841N+T&R
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Active |
TDFN-EP;10 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0003 (PDF)
Use pkgcode/variation: T1033+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS1841X
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Active |
DICE SALES;NA pin;DIE;
Land Pattern: Not Applicable
Use pkgcode/variation: DICE18+*
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-40°C to +85°C
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See data sheet
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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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Notes and Comments
Tyically used with MAX5026 or MAX1523 DC-DC Converters. Can be used with a DS1865 or DS1863 for Triplexor applications.
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Information Index
Rev 2;
2008-05-13
This page last modified: 2008-05-13
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