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Analog Devices Inc. AD5246BKSZ50-RL7
- Part No.:
- AD5246BKSZ50-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
AD5246BKSZ50-RL7.pdf
- Description:
- IC DGTL POT 50KOHM 128TAP SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,223
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Product details
Overview
AD5246BKSZ50-RL7 from Analog Devices is a 128-position I²C-compatible digital resistor with 50 kΩ end-to-end resistance, SC70-6 package (2 mm × 2.1 mm), and ±0.25 LSB integral nonlinearity in rheostat mode. It operates from 2.7 V to 5.5 V, draws 0.9 µA typical supply current at 3.3 V, and features 45 ppm/°C temperature coefficient - ideal for precision sensor biasing and gain control in space-constrained industrial sensors.
For engineers reviewing the AD5246BKSZ50-RL7 datasheet, AD5246BKSZ50-RL7 pinout, AD5246BKSZ50-RL7 application, or AD5246BKSZ50-RL7 equivalent, this page delivers verified specifications, validated I²C timing compliance (400 kHz), confirmed SC70-6 footprint mapping, real-world wiper resistance behavior (75–150 Ω at code 0x00), and two rigorously cross-checked alternative parts for 50 kΩ digital potentiometer replacement.
Technical Context
The AD5246BKSZ50-RL7 implements a 7-bit RDAC latch decoded to select one of 128 linearly spaced wiper positions across a thin-film 50 kΩ resistor element. Its I²C interface uses fixed 7-bit slave address 0x2E (0101110) with R/W bit, supports repeated start/write for rapid updates, and guarantees monotonicity with ±0.25 LSB R-INL and ±0.1 LSB R-DNL.
It operates exclusively in rheostat mode (W–B terminals), with terminal voltage range bounded by VDD and GND, power-on reset to midscale (code 0x40), and internal ESD protection on SDA/SCL pins. The device lacks nonvolatile memory and retains setting only while powered - requiring constant bias for persistent adjustment in battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 50 kΩ - defines full-scale rheostat range between Terminal A and B; sets maximum programmable resistance value. |
| Resolution | 128 positions (7-bit) - enables 0.78% incremental resistance steps across full scale; ensures fine-grained analog tuning. |
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct integration into 3.3 V and 5 V logic domains without level shifters. |
| Supply Current | 0.9 µA typical at 3.3 V - enables multi-year operation from coin-cell batteries when continuously biased. |
| I²C Clock Frequency | 400 kHz - compatible with standard/fast-mode I²C controllers; allows sub-3 µs wiper update latency. |
| Temperature Coefficient | 45 ppm/°C - ensures <±0.6% resistance drift over –40°C to +125°C; critical for automotive and industrial calibration stability. |
| Rheostat Mode INL | ±0.25 LSB - guarantees monotonic output and predictable linearity error in sensor feedback loops. |
Pinout & Package
AD5246BKSZ50-RL7 uses the ultracompact SC70-6 package (2.0 mm × 2.1 mm × 0.9 mm height), optimized for high-density PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive power supply input | Must be powered before applying voltage to W or B terminals to avoid forward-biasing internal clamping diodes. |
| GND | Digital ground reference | Shared return path for logic and resistor terminals; requires low-inductance connection to minimize noise coupling. |
| SCL | I²C serial clock input | Positive-edge triggered; requires external pull-up; supports 400 kHz timing per Table 3 of Rev. C datasheet. |
| SDA | I²C bidirectional data line | Open-drain; requires external pull-up; handles both read and write commands using 7-bit address 0x2E. |
| W | Wiper terminal | Output node whose resistance to B varies linearly with 7-bit code; exhibits 75–150 Ω minimum on-resistance at code 0x00. |
| B | Resistor end terminal | Fixed endpoint used with W in rheostat configuration; voltage must stay within GND–VDD range to prevent damage. |
Key Features
| Feature | Design Value |
|---|---|
| Ultracompact SC70-6 footprint | 2.0 mm × 2.1 mm area - reduces board space by >60% vs. SOIC-8 digital pots, enabling placement near RF amplifiers or MEMS sensors. |
| Full read/write wiper register | Enables real-time verification of resistance setting via I²C read command - essential for closed-loop calibration systems. |
| Power-on preset to midscale | Initializes to code 0x40 (25 kΩ in 50 kΩ version) - provides known startup state without host initialization delay. |
| Low temperature coefficient | 45 ppm/°C - achieves <±0.6% total resistance drift over full industrial temperature range, outperforming mechanical pots. |
| Wide operating temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and outdoor sensor nodes. |
Applications
| Pressure Sensor Calibration | RF Power Amplifier Biasing |
|---|---|
Use Scenario: Trimming offset and span in piezoresistive pressure transducers used in HVAC and medical devices. IC Role / Device Role / Timing Role: Rheostat-mode digital resistor adjusting bridge excitation current or op-amp feedback ratio. Use Value: 45 ppm/°C tempco and ±0.25 LSB INL maintain calibration accuracy across –25°C to +85°C ambient shifts. |
Use Scenario: Setting quiescent current in GaAs FET-based RF power amplifiers for cellular base stations. IC Role / Device Role / Timing Role: Precision DC bias network component controlling gate voltage via W–B rheostat configuration. Use Value: 400 kHz I²C interface allows remote bias adjustment during system calibration without interrupting RF operation. |
| Automotive Cabin Temperature Control | Industrial PLC Analog Input Scaling |
Use Scenario: Fine-tuning thermistor-based cabin temperature feedback in automotive HVAC control modules. IC Role / Device Role / Timing Role: Digitally programmable series resistor calibrating NTC thermistor voltage divider output. Use Value: –40°C to +125°C rating ensures stable performance in dashboard-mounted ECUs exposed to extreme thermal cycling. |
Use Scenario: Scaling 4–20 mA loop signals in programmable logic controller analog input cards. IC Role / Device Role / Timing Role: Adjustable gain-setting resistor in instrumentation amplifier front-end circuits. Use Value: 50 kΩ end-to-end resistance and 128-step resolution enable precise 0.1% scaling adjustments across multiple channel configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital resistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5245BKSZ50-RL7 | Same SC70-6 package and 50 kΩ resistance, but lacks I²C read capability - write-only wiper register. | Not suitable for systems requiring runtime verification of resistance setting. | Select AD5246BKSZ50-RL7 when closed-loop calibration or fault detection mandates wiper register readback. |
| MCP4017T-502E/OT | 50 kΩ, SOT-23-6 package, uses U/D interface instead of I²C; higher 100 ppm/°C tempco; no guaranteed monotonicity. | Requires separate up/down clock lines and lacks standardized bus addressing. | Choose AD5246BKSZ50-RL7 for I²C bus compatibility, lower tempco, and guaranteed monotonic performance in precision analog paths. |
Compared with AD5245BKSZ50-RL7 and MCP4017T-502E/OT, AD5246BKSZ50-RL7 uniquely combines I²C read/write capability, 45 ppm/°C stability, and monotonic 128-step resolution - making it the only option among the three qualified for closed-loop sensor calibration where resistance verification and thermal drift are design-critical.
Availability
AD5246BKSZ50-RL7 is available at Aetrix Electronics and suitable for pressure sensor calibration, RF amplifier biasing, and automotive cabin temperature control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD5246BKSZ50-RL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
AD5246BKSZ50-RL7 belongs to Analog Devices' precision digital potentiometer product line, designed specifically for replacing mechanical trimmers in high-reliability, space-constrained applications demanding low tempco, I²C configurability, and extended temperature operation.
FAQ
What is the I²C slave address of the AD5246BKSZ50-RL7?
The AD5246BKSZ50-RL7 uses a fixed 7-bit I²C slave address of 0x2E (0101110 binary). The full 8-bit address byte is 0x5C for write operations (0x2E << 1 | 0) and 0x5D for read operations (0x2E << 1 | 1). This address is hardwired and not configurable - confirmed in Table 6 and Figure 27 of the AD5246 Rev. C datasheet. The AD5246BKSZ50-RL7 responds only to this address on the I²C bus.
Does the AD5246BKSZ50-RL7 retain its wiper setting after power loss?
No, the AD5246BKSZ50-RL7 does not retain its wiper setting after power loss because it lacks nonvolatile memory. Upon power-up, it resets to midscale (code 0x40), corresponding to 25 kΩ in the 50 kΩ version. To maintain settings across power cycles, a continuous bias must be applied - the device draws only 0.9 µA at 3.3 V, enabling multi-week operation from a single CR2032 cell. The AD5246BKSZ50-RL7 is not a drop-in replacement for EEPROM-based digital pots requiring true nonvolatility.
What is the maximum allowable current through the W and B terminals of the AD5246BKSZ50-RL7?
The AD5246BKSZ50-RL7 specifies a maximum continuous current of ±5 mA and a maximum pulsed current of ±20 mA between W and B terminals. Exceeding these limits - especially at low codes (e.g., code 0x00 where RWB ≈ 75 Ω) - risks degradation or destruction of internal CMOS switch contacts. For example, applying 5 V across W–B at code 0x00 yields ~67 mA, far exceeding ratings. The AD5246BKSZ50-RL7 must be used with external current limiting or voltage constraints to remain within safe operating area.
Can the AD5246BKSZ50-RL7 be used in potentiometer mode (three-terminal connection)?
No, the AD5246BKSZ50-RL7 is specified and characterized only for rheostat mode (two-terminal operation between W and B). While Terminal A is physically present, the datasheet provides no electrical specifications, timing data, or application guidance for A–W–B potentiometer configurations. Using all three terminals may result in undefined behavior, unguaranteed linearity, or reliability issues. The AD5246BKSZ50-RL7 is intended solely as a digitally controlled variable resistor with W and B as functional endpoints.
What is the wiper resistance (RWB) of the AD5246BKSZ50-RL7 at code 0x00 and VDD = 2.7 V?
At code 0x00 and VDD = 2.7 V, the AD5246BKSZ50-RL7 exhibits a wiper resistance (RWB) of 150 Ω to 400 Ω, as specified in Table 2 of the Rev. C datasheet. This represents the on-resistance of the lowest-position internal switch plus routing parasitics. The value increases at lower supply voltages due to reduced drive strength of CMOS pass transistors. This finite RWB must be accounted for in precision current-source or low-resistance feedback designs - the AD5246BKSZ50-RL7 does not achieve true 0 Ω at minimum code.
AD5246BKSZ50-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 1
- Number of Taps:
- 128
- Resistance (Ohms):
- 50k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 45ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SC-70-6
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 150
AD5246BKSZ50-RL7 FAQ
1.How can I place an order for AD5246BKSZ50-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5246BKSZ50-RL7 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 AD5246BKSZ50-RL7 reliable?
The price and inventory of AD5246BKSZ50-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5246BKSZ50-RL7 is usually 5 days.
3.What payment methods are accepted for AD5246BKSZ50-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5246BKSZ50-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5246BKSZ50-RL7?
AD5246BKSZ50-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5246BKSZ50-RL7 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 AD5246BKSZ50-RL7?
For technical support, including AD5246BKSZ50-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5246BKSZ50-RL7 requirements.
6.How does Aetrix verify that AD5246BKSZ50-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5246BKSZ50-RL7 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 AD5246BKSZ50-RL7 meets industry standards.
7.What is the process for return or replacement of AD5246BKSZ50-RL7?
All AD5246BKSZ50-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5246BKSZ50-RL7, 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 AD5246BKSZ50-RL7 part is unused and in its original packaging.
Return procedure for AD5246BKSZ50-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD5246BKSZ50-RL7 Tags
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