ad5171 Analog Devices, Inc., ad5171 Datasheet
ad5171
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ad5171 Summary of contents
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... An AD5171 evaluation kit includes the software, connector, and cable that can be converted for factory programming applications. The AD5171 is available in a compact SOT-23-8 package. All parts are guaranteed to operate over the automotive tempera- ture range of −40°C to +125°C. Besides its unique OTP feature, ...
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... Power Supply Considerations ................................................... 12 ESD Protection ........................................................................... 13 Terminal Voltage Operating Range.......................................... 13 Power-Up/Power-Down Sequences ......................................... 14 Variable Resistance and Voltage for Rheostat Mode ............. 14 Variable Resistance and Voltage for Potentiometer Mode.... 15 Controlling the AD5171 ................................................................ 16 Software Programming.............................................................. 16 REVISION HISTORY 1/05—Rev Rev. B Change to Features ........................................................................... 1 Changes to Electrical Characteristics ............................................ 3 Change to Table 3 ...
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... –0.5 0 1.0 ±1 3 0.4 ±1 3 2.7 5.5 5.25 5 25°C 100 = 5 V 0.02 0.04 DD −0.025 +0.001 +0.025 AD5171 Unit LSB LSB LSB LSB % ppm/°C Ω Bits LSB LSB ppm/°C LSB LSB LSB LSB 0 µ µA ...
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... AD5171 Parameter 7, 11, 12 DYNAMIC CHARACTERISTICS Bandwidth –3 dB Total Harmonic Distortion Adjustment Settling Time OTP Settling Time 13 Power-Up Settling Time—After Fuses Blown Resistor Noise Voltage INTERFACE TIMING CHARACTERISTICS (Apply to all parts SCL Clock Frequency t Bus Free Time between Start and Stop ...
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... SCL SDA Figure 3. Interface Timing Diagram Rev Page AD5171 ...
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... AD5171 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter V to GND GND Maximum Current Pulsed Continuous (R ≤ 1 kΩ, A open Continuous (R ≤ 1 kΩ, B open Digital Inputs and Output Voltage to GND Operating Temperature Range Maximum Junction Temperature (T ...
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... SDA Serial Data Input/Output. Requires a pull-up resistor driven direct from a logic controller without a pull-up resistor, ensure that AD0 I C Device Address Bit. Allows a maximum of two AD5171s to be addressed Resistor Terminal B. GND ≤ Resistor Terminal A. GND ≤ ...
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... AD5171 TYPICAL PERFORMANCE CHARACTERISTICS 0. 0.08 0.06 –40°C 0.04 0.02 0 –0.02 –0.04 –0.06 +25°C –0.08 –0. CODE (DECIMAL) Figure 5. R-INL vs. Code vs. Temperature 0. 0.08 +25°C 0.06 0.04 0.02 0 –0.02 –40°C –0.04 –0.06 –0.08 –0. CODE (DECIMAL) Figure 6. R-DNL vs. Code vs. Temperature ...
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... Figure 14. Gain vs. Frequency vs. Code kΩ AB 0x3F 0x20 0x10 0x08 0x04 0x02 0x01 0x00 1k 10k 100k FREQUENCY (Hz) Figure 15. Gain vs. Frequency vs. Code kΩ AB 0x3F 0x20 0x10 0x08 0x04 0x02 0x01 0x00 1k 10k 100k FREQUENCY (Hz Ω Figure 16. Gain vs. Frequency vs. Code AD5171 10M 1M 1M ...
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... AD5171 6 0x3F 0 0x20 –6 0x10 –12 0x08 –18 0x04 –24 0x02 –30 0x01 –36 –42 –48 0x00 –54 100 1k 10k FREQUENCY (Hz) Figure 17. Gain vs. Frequency vs. Code 25°C A CODE = 0x20 V = 2.5V ± 1.0V p ± 0.6V p 100 ...
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... OPEN 25° 1. 0.10 0. CODE (DECIMAL) Figure 23 vs. Code WB MAX = 5kΩ = 10kΩ = 50kΩ 100kΩ Rev Page AD5171 ...
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... ONE-TIME PROGRAMMING (OTP) Prior to OTP activation, the AD5171 presets to midscale during initial power-on. After the wiper is set at the desired position, the resistance can be permanently set by programming the T bit ...
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... DD_OTP MOSFETs gates, thus turning off P1 and P2. The OTP command should be executed at this time to program the AD5171 while the 2.7 V source is protected. Once the fuse programming is complete, the tester withdraws the V the AD5171’s setting is permanently fixed. AD5171 achieves the OTP function through blowing internal fuses ...
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... D = × vs. Codes: R =10 kΩ;Terminal B Open (Ω) Output State WA 60 Full-scale 4980 Midscale 9901 1 LSB 10060 Zero-scale RDAC S LATCH AND B DECODER Figure 31. AD5171 Equivalent RDAC Circuit starts (2) ...
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... Potentiometer mode includes other operations such as op amp input, feedback resistor networks, and voltage scaling applica- tions. Terminal A, Terminal W, and Terminal B can, in fact, be input or output terminals provided that |V do not exceed V transfer function (3) (4) Rev Page AD5171 terms and CMOS switches resistance ( and | GND ...
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... Pin 2, Pin 3, Pin 15, and Pin 25 for SDA_write, SCL, SDA_read, and DGND, respectively, for the control signals (Figure 34). Also lay out the PCB of the AD5171 with SCL and SDA pads, as shown in Figure 35, such that pogo pins can be inserted for the factory programming. ...
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... Description S Start Condition. P Stop Condition. A Acknowledge. 2 AD0 I C Device Address Bit. Allows a maximum of two AD5171s to be addressed. X Don’t Care. T OTP Programming Bit. Logic 1 programs the wiper position permanently. D5, D4, D3, D2, D1, D0 Data Bits. E1, E0 OTP Validation Bits Ready to Program. ...
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... The next bit is AD0, 2 which device address bit. Depending on the states of their AD0 bits, two AD5171s can be addressed on the same bus (Figure 39). The last LSB is the R/ W bit, which determines whether data is read from, or written to, the slave device. ...
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... SCL1 V O RESISTANCE SCALING The AD5171 offers 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ nominal resistances. For users who need to optimize the resolution with an arbitrary full range resistance, the following techniques can be used. By paralleling a discrete resistor (Figure 44), a propor- tionately lower voltage appears at Terminal A to Terminal B, which is applicable only to the voltage divider mode ...
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... The internal parasitic capacitances and the external capacitive loads dominate the ac characteristics of the digital potentio- meters. Configured as a potentiometer divider, the –3 dB bandwidth of the AD5171 (5 kΩ resistor) measures 1.5 MHz at (6) half scale. Figure 14 to Figure 17 provide the large signal BODE plot characteristics of the four available resistor versions: 5 kΩ ...
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... SDA The AD5171 evaluation board comes with a dual op amp AD822 and a 2.5 V reference ADR03. Users can configure many building block circuits with minimum components needed. Figure 49 shows one of the examples. There is space available on the board where users can build additional circuits for further evaluations as shown in Figure 50 ...
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... AD5171BRJ10-RL7 10 2 AD5171BRJZ10- AD5171BRJZ10-R7 10 AD5171BRJ50-R2 50 AD5171BRJ50-RL7 50 2 AD5171BRJZ50- AD5171BRJZ50-R7 50 AD5171BRJ100-R2 100 AD5171BRJ100-RL7 100 2 AD5171BRJZ100-R2 100 2 AD5171BRJZ100-R7 100 3 AD5171EVAL 10 1 Parts have a YWW or #YWW marking on the bottom of the package. # stands for Pb-free part. Y shows the year that the part was made, for example for 2005. WW shows the work week that the part was made ...
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... NOTES Rev Page AD5171 ...
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... AD5171 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I Rights to use these components system, provided that the system conforms to the I © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...