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Analog Devices Inc./Maxim Integrated DS3904U-010+T&R
- Part No.:
- DS3904U-010+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS3904U-010+T&R.pdf
- Description:
- IC DGTL POT 20K/10K/20KOHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
DS3904U-010+T&R from Maxim Integrated is a triple-channel, nonvolatile digital potentiometer IC with 128-position resolution per channel, configured as 20kΩ / 10kΩ / 20kΩ resistors plus high-impedance switch mode. It operates from 2.7V to 5.5V, features I²C-compatible 2-wire serial interface, and supports industrial temperature range (−40°C to +85°C). It replaces mechanical trimmers in precision calibration circuits for power supplies and portable electronics.
For engineers reviewing the DS3904U-010+T&R datasheet, DS3904U-010+T&R pinout, DS3904U-010+T&R application, or DS3904U-010+T&R equivalent, key selection criteria include resistor value mapping (R0/R1/R2 = 20k/10k/20k), NV memory retention, Hi-Z switch capability per channel, µSOP-8 package constraints, and I²C address flexibility via A0 pin.
Technical Context
The DS3904U-010+T&R implements three independent digitally controlled resistive elements, each with factory-default 7Fh setting and programmable positions 00h–7Fh plus RHIZ mode (bit 7 = 1). Resistor terminals H0/H1/H2 support voltage levels up to 5.5V independent of VCC, enabling level-shifting applications. The device functions exclusively as an I²C slave with fixed 7-bit base address (101000x) and single A0 address bit.
Internal EEPROM stores settings across power cycles with ≥50,000 write cycles and >100-year data retention. Standby current is 95–200 µA at 3V, and startup time is 2 ms. AC timing complies with I²C standard-mode (100 kHz) and fast-mode (400 kHz) specifications, including tSU:DAT ≥250 ns and tHD:STA ≥4.0 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resistor Values | R0 = 20kΩ, R1 = 10kΩ, R2 = 20kΩ (nominal at 25°C, ±20% tolerance) |
| Resolution | 128 positions (00h–7Fh) + Hi-Z mode per resistor - enables precise gain/offset trimming |
| Nonvolatile Memory | EEPROM storage with ≥50,000 write cycles and >100-year retention - eliminates recalibration after power loss |
| Interface | I²C-compatible 2-wire serial (SCL/SDA), 7-bit address with A0 pin - supports up to two devices on same bus |
| Temperature Coefficient | ≤±400 ppm/°C (20kΩ) and ≤±450 ppm/°C (10kΩ) - ensures stable resistance over −40°C to +85°C |
| Supply Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifters |
| Terminal Voltage Rating | H0/H1/H2 tolerate up to 5.5V regardless of VCC - allows mixed-voltage system control (e.g., 3V MCU controlling 5V analog path) |
Pinout & Package
DS3904U-010+T&R is housed in an 8-pin µSOP package (2.0mm × 2.5mm, 0.5mm pitch), optimized for space-constrained PCB layouts in portable and telecom equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SDA | 2-wire serial data I/O | Open-drain bidirectional line - requires external pullup; handles command/data transfer and ACK/NACK |
| 2 SCL | 2-wire serial clock input | Master-generated clock - defines timing for data sampling and setup/hold compliance |
| 3 VCC | Positive supply | 2.7V–5.5V power rail - powers internal logic and EEPROM; decoupling capacitor required |
| 4 GND | Ground reference | Return path for all currents - must be low-impedance connection to minimize noise coupling |
| 5 H2 | Resistor 2 high terminal | Analog output node for R2 - connects to feedback network or bias point in adjustable regulator |
| 6 H1 | Resistor 1 high terminal | Analog output node for R1 (10kΩ) - used in gain-setting paths requiring lower resistance range |
| 7 H0 | Resistor 0 high terminal | Analog output node for R0 - primary adjustment point for reference voltage or current-sense scaling |
| 8 A0 | Address select input | Binary address bit - sets LSB of I²C address (1010000 or 1010001); tied to GND or VCC for device selection |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent resistors | Enables simultaneous calibration of multiple analog paths (e.g., VOUT, IOUT, REF) without inter-channel crosstalk |
| Hi-Z switch mode per resistor | Each channel can disconnect analog signal path - replaces discrete SPST switches in reconfigurable filters or multiplexed sensor interfaces |
| Low temperature coefficient | Stable resistance over full industrial temperature range - critical for battery-powered devices operating in variable ambient conditions |
| Nonvolatile storage | Preserves last-set values through power cycles - eliminates boot-time initialization routines in embedded firmware |
| µSOP-8 footprint | Reduces board area by >70% vs. through-hole trimpots - supports automated assembly and high-density layout |
Applications
| Power-Supply Calibration | Cell Phone RF Front-End |
|---|---|
Use Scenario: Fine-tuning output voltage of DC-DC converters in telecom base stations and server PSUs. IC Role / Device Role / Timing Role: DS3904U-010+T&R serves as programmable feedback divider resistor in voltage regulation loop. Use Value: Enables factory and field calibration without manual adjustment; 128-step resolution achieves <±0.8% VOUT accuracy. |
Use Scenario: Dynamic bias control of power amplifiers and LNA stages in multi-band cellular handsets. IC Role / Device Role / Timing Role: DS3904U-010+T&R adjusts quiescent current and gain in RF amplifier bias networks. Use Value: Supports adaptive power management across frequency bands; Hi-Z mode disables unused PA stages to reduce leakage. |
| Fibre Optic Transceiver Modules | Portable Test Equipment |
Use Scenario: Laser diode bias current and modulation amplitude calibration in SFP/SFP+ optical modules. IC Role / Device Role / Timing Role: DS3904U-010+T&R sets precision current source for TEC (thermoelectric cooler) control and laser driver offset. Use Value: Nonvolatile storage retains calibrated values across hot-plug events; 10kΩ R1 matches low-impedance DAC output stages. |
Use Scenario: Programmable gain and offset adjustment in handheld multimeters and signal generators. IC Role / Device Role / Timing Role: DS3904U-010+T&R configures analog front-end scaling factors and reference voltages under microcontroller control. Use Value: Eliminates manual calibration during production; µSOP-8 footprint fits compact enclosures while supporting firmware-based self-test routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5477EUD+ | Single 100kΩ, 256-tap, SPI interface, 10-pin µMAX - no Hi-Z mode, higher resolution but fewer channels | Suitable for single-path gain control only; lacks triple-resistor integration and I²C compatibility | Select when higher resolution (256 steps) and SPI interface are required, and space permits larger package. |
| AD5170BRMZ-10 | Dual 10kΩ, 128-tap, I²C interface, 10-pin MSOP - identical R1 value but dual-channel only; no 20kΩ/10kΩ/20kΩ mix | Cannot replicate DS3904U-010+T&R's asymmetric resistor configuration; requires two devices for triple-channel use | Choose for cost-sensitive dual-channel designs where matched 10kΩ resistors suffice and µSOP-8 footprint is not mandatory. |
Compared with MAX5477EUD+ and AD5170BRMZ-10, DS3904U-010+T&R uniquely delivers asymmetric triple-resistor topology (20k/10k/20k) in a space-saving µSOP-8 package with integrated Hi-Z switch functionality - making it optimal for compact, multi-parameter calibration systems requiring I²C simplicity and nonvolatile retention.
Availability
DS3904U-010+T&R is available at Aetrix Electronics and suitable for power-supply calibration, portable RF front-ends, fibre optic transceiver modules, and handheld test equipment requiring stable component supply and long-term obsolescence mitigation.
Supply support for DS3904U-010+T&R 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, communications, and consumer applications, emphasizing high reliability and integration density.
The DS3904U-010+T&R belongs to Maxim's digital potentiometer product line, engineered specifically for replacing mechanical trimmers in automated calibration systems where nonvolatility, small size, and I²C simplicity are essential.
FAQ
What is the resistor value configuration of DS3904U-010+T&R?
The DS3904U-010+T&R has three digitally controlled resistors with nominal values of 20kΩ (R0), 10kΩ (R1), and 20kΩ (R2) at 25°C. This asymmetric configuration is explicitly defined in the Ordering Information table and distinguishes DS3904U-010+T&R from variants like DS3904U-020 (20k/20k/20k). Each resistor offers 128 linear positions plus a high-impedance state.
Does DS3904U-010+T&R support I²C fast-mode operation?
Yes, DS3904U-010+T&R fully supports I²C fast-mode operation at up to 400 kHz, as confirmed in the AC Electrical Characteristics table. Its timing parameters-including tSU:DAT (≥0.9 µs), tHD:STA (≥0.6 µs), and tLOW (≥1.3 µs)-meet fast-mode requirements. Standard-mode (100 kHz) is also supported, and the device automatically adapts to the bus speed set by the master.
Can the H0, H1, or H2 terminals of DS3904U-010+T&R operate above VCC voltage?
Yes, DS3904U-010+T&R allows H0, H1, and H2 terminals to operate up to 5.5V regardless of VCC level, as specified in the Absolute Maximum Ratings and Applications Information sections. This enables level-shifting applications-for example, using a 3.3V microcontroller (VCC = 3.3V) to control a 5V analog signal path connected to H1-without external level translators.
How does the high-impedance (Hi-Z) mode function in DS3904U-010+T&R?
In DS3904U-010+T&R, writing 80h to any resistor register (F8h/F9h/FAh) activates the high-impedance mode by setting the RHIZ control bit (MSB). This disconnects the wiper from both terminals, presenting >5.5MΩ between Hx and Lx. Combined with an external pullup, it creates a digital logic-level switch-enabling functions like enabling/disabling bias networks or isolating feedback paths in power converters.
What is the EEPROM endurance and data retention specification for DS3904U-010+T&R?
DS3904U-010+T&R guarantees ≥50,000 write cycles to its internal EEPROM and >100 years of data retention at +70°C, as documented in the Nonvolatile Memory Characteristics table. These values are measured under specified programming conditions (VCC = 2.7V–5.5V, TA = +70°C) and ensure reliable calibration storage across product lifecycles in industrial and telecom applications.
DS3904U-010+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 3
- Number of Taps:
- 128
- Resistance (Ohms):
- 20k, 10k, 20k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- -
- Temperature Coefficient (Typ):
- 173ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- -
DS3904U-010+T&R FAQ
1.How can I place an order for DS3904U-010+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS3904U-010+T&R 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 DS3904U-010+T&R reliable?
The price and inventory of DS3904U-010+T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS3904U-010+T&R is usually 5 days.
3.What payment methods are accepted for DS3904U-010+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS3904U-010+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS3904U-010+T&R?
DS3904U-010+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS3904U-010+T&R 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 DS3904U-010+T&R?
For technical support, including DS3904U-010+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS3904U-010+T&R requirements.
6.How does Aetrix verify that DS3904U-010+T&R is sourced from the original manufacturer or authorized distributors?
All DS3904U-010+T&R 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 DS3904U-010+T&R meets industry standards.
7.What is the process for return or replacement of DS3904U-010+T&R?
All DS3904U-010+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS3904U-010+T&R, 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 DS3904U-010+T&R part is unused and in its original packaging.
Return procedure for DS3904U-010+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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