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Analog Devices Inc. AD5171BRJZ100-R7
- Part No.:
- AD5171BRJZ100-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- SOT-23-8
- Datasheet:
-
AD5171BRJZ100-R7.pdf
- Description:
- IC DGT POT 100KOHM 64TAP SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,949
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Product details
Overview
AD5171BRJZ100-R7 from Analog Devices is a 64-position, one-time programmable (OTP) digital potentiometer in SOT-23-8 package, featuring 100 kΩ end-to-end resistance, 5 ppm/°C tempco in potentiometer mode, I²C-compatible interface, and automotive-grade operation from −40°C to +125°C. It replaces mechanical trimmers in factory-set calibration circuits where permanent resistance setting is required.
For engineers reviewing the AD5171BRJZ100-R7 datasheet, AD5171BRJZ100-R7 pinout, AD5171BRJZ100-R7 application, or AD5171BRJZ100-R7 equivalent, key selection criteria include OTP validation status, wiper resistance (≤115 Ω), ±0.5 LSB DNL in potentiometer mode, 60 kHz −3 dB bandwidth at 100 kΩ, and VDD_OTP compliance (4.75–5.25 V) for fuse programming.
Technical Context
The AD5171BRJZ100-R7 implements fuse-link OTP memory using six data fuses, one test fuse, and one programming lock fuse-enabling irreversible, nonvolatile wiper position storage after a single 400 ms VDD_OTP pulse. Its I²C interface supports standard-mode (400 kHz) timing with AD0 address bit enabling dual-device bus configuration.
In potentiometer mode, it delivers ratiometric voltage division with 5 ppm/°C tempco at code 0x20 and full-scale error ≤0 LSB for 10 kΩ/50 kΩ/100 kΩ variants; in rheostat mode, it exhibits 35 ppm/°C resistance tempco and supports ≤5 mA continuous terminal current with RW ≤115 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 100 kΩ - defines maximum adjustable resistance between A and B terminals; determines bandwidth (60 kHz) and power handling. |
| Resolution | 6-bit (64 positions) - enables discrete wiper control with 1.56% step size; supports monotonic adjustment per guaranteed DNL. |
| Temperature Coefficient (Pot Mode) | 5 ppm/°C at code 0x20 - ensures stable voltage division ratio across −40°C to +125°C; critical for precision sensor biasing. |
| I²C Clock Frequency | 400 kHz - compatible with standard-mode controllers; enables fast factory programming before OTP activation. |
| OTP Supply Voltage | 4.75 V to 5.25 V - strict window required to reliably blow fuses; mandates external supply if system VDD < 4.75 V. |
| Wiper Resistance | 60 Ω to 115 Ω - contributes directly to zero-scale error and thermal noise; limits minimum achievable RWB to ~60 Ω. |
| Supply Current (IDD) | 4 μA to 10 μA - enables ultra-low-power operation in battery-backed calibration circuits. |
Pinout & Package
AD5171BRJZ100-R7 is housed in an 8-lead SOT-23 package (JEDEC MO-178AA), with 1.9 mm × 2.8 mm footprint and 1.1 mm height. Pin 1 (W) is marked by a dot; device orientation follows standard SOT-23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (W) | Wiper terminal | Output node for variable resistance/voltage; voltage constrained to GND ≤ VW ≤ VDD; drives load in pot/rheostat configurations. |
| 2 (VDD) | Positive power supply | Operates from 2.7 V to 5.5 V; must be 4.75–5.25 V during OTP programming; supplies 100 mA peak for fuse blow. |
| 3 (GND) | Ground reference | Common return for analog and digital sections; decoupling capacitor required near pin for noise immunity. |
| 4 (SCL) | I²C clock input | Open-drain input requiring external pull-up; VIH ≥ 0.7×VDD; timing-critical for 400 kHz bus operation. |
| 5 (SDA) | I²C bidirectional data | Open-drain I/O requiring external pull-up; supports read/write of wiper register and OTP validation bits E1/E0. |
| 6 (AD0) | Device address bit | Sets LSB of 7-bit I²C address (0x2C or 0x2D); enables two AD5171 devices on same bus without address conflict. |
| 7 (B) | Resistor terminal B | Fixed end of resistor ladder; used with W in rheostat mode or with A/W in potentiometer divider configuration. |
| 8 (A) | Resistor terminal A | Fixed end of resistor ladder; tied to VDD in standard pot mode; polarity unrestricted relative to B/W. |
Key Features
| Feature | Design Value |
|---|---|
| One-time programmable (OTP) memory | Fuse-link technology provides irreversible, nonvolatile wiper setting-eliminates need for EEPROM and reduces cost vs. reprogrammable RDACs. |
| Low potentiometer tempco | 5 ppm/°C at mid-code enables stable gain/offset calibration in automotive temperature range without software compensation. |
| Full read/write capability | Allows unlimited pre-OTP wiper adjustments and post-programming verification of E1/E0 validation bits to confirm fuse status. |
| Automotive-grade operating range | Guaranteed functionality from −40°C to +125°C meets AEC-Q100 stress requirements for under-hood electronics. |
| Compact SOT-23-8 package | Enables space-constrained PCB layouts in engine control units, ADAS sensors, and infotainment subsystems. |
Applications
| Engine Coolant Temperature Calibration | Brake Pressure Sensor Offset Trim |
|---|---|
Use Scenario: Factory-trimmed voltage divider sets reference point for NTC thermistor signal conditioning in coolant temperature modules. IC Role / Device Role / Timing Role: AD5171BRJZ100-R7 operates as a ratiometric potentiometer divider, providing stable VOUT = VIN × D/63 with 5 ppm/°C tempco. Use Value: Eliminates manual trimming; achieves ±0.5°C accuracy over full automotive temperature range without recalibration. |
Use Scenario: Permanent offset adjustment in piezoresistive brake pressure transducer front-end amplifiers. IC Role / Device Role / Timing Role: AD5171BRJZ100-R7 configures as rheostat between amplifier feedback path and ground to set DC bias point. Use Value: Replaces epoxy-fixed mechanical pot; maintains <±2 mV offset drift from −40°C to +125°C due to 35 ppm/°C rheostat tempco. |
| Infotainment Display Brightness Control | Electric Power Steering Motor Current Sense Gain |
Use Scenario: Factory-programmed resistance sets LED backlight driver current limit in center console displays. IC Role / Device Role / Timing Role: AD5171BRJZ100-R7 functions as fixed rheostat (W–B) in constant-current source feedback loop. Use Value: Enables precise 0–100% brightness mapping with <1% unit-to-unit variation; OTP prevents field tampering. |
Use Scenario: Gain-setting element in shunt-based motor phase current sensing amplifier for EPS control ECUs. IC Role / Device Role / Timing Role: AD5171BRJZ100-R7 acts as potentiometer divider to scale reference voltage applied to instrumentation amplifier. Use Value: Delivers 0.1% gain accuracy stability over lifetime; avoids EEPROM wear-out failure modes in safety-critical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5170BRJZ100-R7 | No OTP function; uses volatile register only; identical pinout, specs, and 100 kΩ resistance. | Requires host MCU to reload wiper value at each power-up; unsuitable for set-and-forget factory calibration. | Select when field reconfiguration is needed; avoid if permanent setting is mandatory. |
| MCP41HV51-104E/SN | 100 kΩ, 256-step, SPI interface, EEPROM-based nonvolatile memory; 6.5 V max VDD; no automotive temp grade. | Supports multiple reprogramming cycles; lacks −40°C to +125°C guarantee and OTP validation bits. | Choose for prototyping or non-automotive designs needing reprogrammability; verify temp range fit. |
Compared with AD5171BRJZ100-R7, AD5170BRJZ100-R7 offers identical analog performance but zero nonvolatility, while MCP41HV51-104E/SN adds reprogrammability at the cost of automotive qualification and OTP reliability assurance.
Availability
AD5171BRJZ100-R7 is available at Aetrix Electronics and suitable for engine control units, brake sensor modules, infotainment display subsystems, and electric power steering ECUs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD5171BRJZ100-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The AD5171BRJZ100-R7 belongs to Analog Devices' OTP digital potentiometer product line, engineered for factory-programmed calibration in automotive and industrial systems where permanent, tamper-proof resistance settings are essential.
FAQ
What does the "R7" suffix in AD5171BRJZ100-R7 indicate?
The "R7" suffix denotes tape-and-reel packaging per JEDEC standard: 3,000 units per reel, compatible with automated SMT placement equipment. This packaging format applies specifically to the AD5171BRJZ100-R7 variant and ensures consistent handling during high-volume manufacturing of automotive control modules.
Can AD5171BRJZ100-R7 be reprogrammed after OTP activation?
No. Once the OTP fuse is blown, the wiper position is permanently locked. The AD5171BRJZ100-R7 validation bits (E1/E0 = 11) confirm successful programming, and further write attempts to the wiper register are ignored. Attempting to re-blow fuses risks fatal error (E1/E0 = 10) and device discard.
What is the maximum allowable voltage across terminals A, B, and W of AD5171BRJZ100-R7?
The AD5171BRJZ100-R7 specifies VA, VB, and VW must remain within GND to VDD per Absolute Maximum Ratings. With VDD = 5.5 V max, the maximum differential voltage between any two terminals is 5.5 V. Exceeding this risks permanent damage to internal switches or fuse structures.
How does the 100 kΩ end-to-end resistance affect bandwidth in AD5171BRJZ100-R7?
At 100 kΩ, the AD5171BRJZ100-R7 achieves a −3 dB bandwidth of 60 kHz (code = 0x20). This is the lowest bandwidth among its resistance variants (5 kΩ yields 1.5 MHz); users selecting AD5171BRJZ100-R7 must verify signal frequency content stays below 60 kHz to avoid attenuation in filter or gain-control applications.
Is AD5171BRJZ100-R7 qualified to AEC-Q100 standards?
While AD5171BRJZ100-R7 is specified and tested over the automotive temperature range (−40°C to +125°C) and packaged in automotive-grade SOT-23, Analog Devices does not list formal AEC-Q100 qualification for this part. Designers requiring certified qualification should consult latest manufacturer documentation or consider AD5175 series alternatives.
AD5171BRJZ100-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 64
- Resistance (Ohms):
- 100k
- Interface:
- I2C
- Memory Type:
- OTP
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-8
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 60
AD5171BRJZ100-R7 FAQ
1.How can I place an order for AD5171BRJZ100-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5171BRJZ100-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD5171BRJZ100-R7 reliable?
The price and inventory of AD5171BRJZ100-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5171BRJZ100-R7 is usually 5 days.
3.What payment methods are accepted for AD5171BRJZ100-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5171BRJZ100-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5171BRJZ100-R7?
AD5171BRJZ100-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5171BRJZ100-R7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD5171BRJZ100-R7?
For technical support, including AD5171BRJZ100-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5171BRJZ100-R7 requirements.
6.How does Aetrix verify that AD5171BRJZ100-R7 is sourced from the original manufacturer or authorized distributors?
All AD5171BRJZ100-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD5171BRJZ100-R7 meets industry standards.
7.What is the process for return or replacement of AD5171BRJZ100-R7?
All AD5171BRJZ100-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5171BRJZ100-R7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD5171BRJZ100-R7 part is unused and in its original packaging.
Return procedure for AD5171BRJZ100-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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