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DS1841T+TR Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1841T+TR Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 16 page Temperature-Controlled, NV, I2C, Logarithmic Resistor Rev 0; 11/07 ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. General Description The DS1841 is a 7-bit, logarithmic, nonvolatile (NV) digi- tal 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 regis- ter (IVR) to drive the resistor. This flexible LUT-based architecture allows the DS1841 to provide a tempera- ture-compensated resistor output with arbitrary slope. Programming is accomplished by an I2C-compatible interface, which can operate at speeds of up to 400kHz. Applications Optical Transceivers Linear and Nonlinear Compensation Instrumentation and Industrial Controls Mechanical Potentiometer Replacement Features ♦ 22kΩ to 3.7kΩ Adjustable Logarithmic Resistor with a 3.6k Ω 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 13 4 10 8 7 SCL RH RW SDA *EP *EXPOSED PAD VCC A1 2 9 N.C. GND 5 6 RGND A0 TDFN 3.0mm × 3.0mm × 0.8mm TOP VIEW DS1841 Pin Configuration Ordering Information 0.1 μF 3.3V APD BIAS CONTROL APPLICATION VCC VOUT FB SDA SCL A1 A0 GND 100pF RW RGND RH VAPD 4.7k Ω 4.7k Ω DC-DC CONVERTER DS1841 Typical Operating Circuit + Denotes a lead-free package. T&R = Tape and reel. Registers and Modes are capitalized for clarity. PART TEMP RANGE PIN-PACKAGE DS1841T+ -40°C to +100°C 10 TDFN DS1841T+T&R -40°C to +100°C 10 TDFN |
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