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Renesas X9015UM8Z
- Part No.:
- X9015UM8Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
X9015UM8Z.pdf
- Description:
- IC DGTL POT 50KOHM 32TAP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,333
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Product details
Overview
X9015UM8Z from Intersil is a volatile, low-noise, digitally controlled potentiometer (XDCP™) with 32-tap resolution, 50 kΩ end-to-end resistance, and 3-wire up/down serial interface. It operates from 2.7V to 5.5V, draws ≤50 µA active current, and powers up at Tap #15 - used for precision analog trimming in voltage reference and op-amp gain-setting circuits.
For engineers reviewing the X9015UM8Z datasheet, X9015UM8Z pinout, X9015UM8Z application, or X9015UM8Z equivalent, key selection criteria include its MSOP-8 package, wiper resistance (400–1000 Ω at 2.7V), ±1 MI absolute linearity, ratiometric temperature coefficient (±20 ppm/°C), and make-before-break switching behavior during tap transitions.
Technical Context
The X9015UM8Z implements a 5-bit up/down counter driving a 31-resistor string array via decoded electronic switches. Its control logic responds to negative-edge-triggered INC pulses while U/D sets direction, and CS enables selection or standby mode. The wiper terminal (RW/VW) connects to one of 32 nodes with no EEPROM storage - position resets to Tap #15 on power-up.
It features true make-before-break switching during tap changes, causing temporary parallel conduction across multiple resistors and transient reduction in effective RTOTAL. Wiper series resistance varies with supply voltage (400–1000 Ω at VCC = 2.7V), and noise is specified at –120 dBV referenced to 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RTOTAL | 50 kΩ - defines full-scale resistance range for voltage divider or variable resistor configurations |
| VCC Range | 2.7V to 5.5V - supports single-supply operation in battery-powered and mixed-voltage systems |
| Active Current | ≤50 µA - enables ultra-low-power analog trimming in always-on sensor front-ends |
| Standby Current | ≤1 µA - allows deep-sleep retention of system state without significant quiescent drain |
| Absolute Linearity | ±1 MI - ensures ≤3.2% max deviation from ideal voltage division across all taps (MI = RTOTAL/31) |
| Ratiometric TC | ±20 ppm/°C - maintains stable voltage division ratio over temperature without external compensation |
| Wiper Resistance | 400–1000 Ω at 2.7V - impacts loading error in high-impedance feedback paths and must be factored into gain accuracy |
Pinout & Package
Package: 8-lead MSOP (M8.118), 3.0 mm × 3.0 mm body, 0.65 mm pitch, RoHS-compliant matte tin terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Must be ≥ VH, VL, VW; powers internal logic and resistor array |
| VSS | Ground reference | Return path for supply and signal currents; establishes 0 V reference |
| CS | Chip select control | Active-low enable; HIGH places device in standby (≤1 µA) |
| INC | Increment clock input | Negative-edge triggered; advances or retracts wiper per U/D state |
| U/D | Direction control | HIGH = increment tap; LOW = decrement tap; sampled on INC edge |
| RH/VH | High terminal | Fixed end of resistor string; voltage range = 0 to VCC |
| RL/VL | Low terminal | Fixed end of resistor string; voltage range = 0 to VCC |
| RW/VW | Wiper output | Movable terminal; connects to selected tap node; 400–1000 Ω series resistance at 2.7V |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire up/down interface | Eliminates need for microcontroller SPI/I²C peripherals - compatible with simple GPIO-driven timing |
| Make-before-break switching | Prevents open-circuit glitches during tap transitions but requires design allowance for momentary RTOTAL reduction |
| Volatile memory architecture | Enables rapid initialization and eliminates write-cycle delays; wiper defaults to Tap #15 at every power-on |
| Low 1 µA standby current | Supports energy-sensitive applications such as portable medical sensors and battery-backed instrumentation |
| ±20 ppm/°C ratiometric TC | Preserves voltage division accuracy across 0°C to +70°C without calibration or compensation circuitry |
Applications
| Reference Voltage Trimming | Op-Amp Gain Adjustment |
|---|---|
Use Scenario: Fine-tuning output of a bandgap reference IC (e.g., REF5025) to achieve ±0.1% initial accuracy. IC Role / Device Role / Timing Role: Digitally programmable two-terminal variable resistor in the feedback network of a reference buffer amplifier. Use Value: Enables factory calibration via MCU without manual potentiometer adjustment; achieves <0.5% total error including linearity and tempco. | Use Scenario: Setting closed-loop gain of an instrumentation amplifier (e.g., AD8421) in a data acquisition channel. IC Role / Device Role / Timing Role: Three-terminal voltage divider controlling feedback ratio in non-inverting configuration. Use Value: Allows remote gain reconfiguration via digital command; ±1 MI linearity ensures predictable stepwise gain increments. |
| LED Current Regulation | Audio Channel Balance Control |
Use Scenario: Adjusting bias current in a constant-current LED driver (e.g., LM3409-based) for luminance calibration. IC Role / Device Role / Timing Role: Two-terminal variable resistor in the sense resistor path of a current-sense amplifier. Use Value: Provides 32 discrete current levels with <±3% total error; low 50 µA ICC avoids interference with sensitive current sensing. | Use Scenario: Implementing digital volume/balance control in a stereo line-level audio preamplifier stage. IC Role / Device Role / Timing Role: Dual-channel matched potentiometer (using two X9015UM8Z) in left/right attenuator networks. Use Value: Delivers –120 dBV noise floor suitable for line-input stages; ±20 ppm/°C ratiometric TC preserves channel matching across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5175BRMZ-50 | I²C interface, nonvolatile EEPROM, 256 taps, 50 kΩ, 100 ppm/°C RTOTAL TC | Requires I²C host; retains setting across power cycles; higher resolution but higher noise (–95 dBV) | Select when persistent wiper position is required and I²C infrastructure exists. |
| MCP41050-I/P | SPITM interface, volatile, 257 taps, 50 kΩ, 500 µA active current, ±300 ppm/°C RTOTAL TC | Higher power consumption; wider RTOTAL tempco reduces voltage-ratio stability over temperature | Select when SPI compatibility is mandatory and ±300 ppm/°C drift is acceptable in ambient-limited environments. |
Compared with X9015UM8Z, AD5175BRMZ-50 offers nonvolatility and finer resolution but sacrifices low-noise performance and adds interface complexity; MCP41050-I/P matches RTOTAL but trades off 10× higher active current and poorer ratiometric stability - making X9015UM8Z optimal for low-power, precision voltage-ratio applications where power-on reset is acceptable.
Availability
X9015UM8Z is available at Aetrix Electronics and suitable for reference voltage trimming, op-amp gain adjustment, LED current regulation, and audio channel balance control requiring stable component supply across industrial temperature ranges (0°C to +70°C).
Supply support for X9015UM8Z 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
Intersil Corporation is a precision analog and power management semiconductor provider, now part of Renesas Electronics, with legacy focus on high-reliability industrial and infrastructure solutions.
The X9015 product line delivers volatile digital potentiometers optimized for low-noise, low-power analog trimming in voltage references, sensor signal conditioning, and programmable gain amplifiers - targeting applications where simplicity, predictability, and minimal quiescent draw outweigh nonvolatile storage needs.
FAQ
What is the default wiper position of the X9015UM8Z at power-up?
The X9015UM8Z powers up with the wiper at Tap #15, regardless of its prior position. This behavior is inherent to its volatile architecture - no EEPROM or latch retains state between power cycles. The fixed terminals are RH/VH (Tap #31) and RL/VL (Tap #0), so Tap #15 corresponds to mid-scale resistance (25 kΩ nominal for 50 kΩ RTOTAL). This deterministic reset simplifies system initialization in calibration routines.
Does the X9015UM8Z support I²C or SPI communication protocols?
No, the X9015UM8Z does not support I²C or SPI. It uses a dedicated 3-wire up/down serial interface with discrete CS, INC, and U/D signals. Communication relies on edge-triggered INC pulses and level-sensitive U/D control - eliminating protocol overhead and enabling direct GPIO control from microcontrollers without dedicated peripheral blocks. This architecture reduces firmware complexity and avoids bus arbitration or address conflicts common in multi-device I²C/SPI systems.
What is the maximum wiper current rating for the X9015UM8Z?
The X9015UM8Z specifies a maximum wiper current (IW) of ±3.75 mA under all operating conditions. Exceeding this limit risks irreversible degradation of the internal transfer gates and increased wiper resistance drift. For applications involving higher current - such as direct LED biasing - external buffering (e.g., op-amp follower) is required. The wiper resistance itself varies from 400 Ω to 1000 Ω at 2.7V, meaning even 1 mA produces up to 1 V drop across the wiper, which must be accounted for in voltage-divider accuracy calculations.
How does the "make-before-break" switching behavior affect circuit performance in the X9015UM8Z?
The X9015UM8Z employs make-before-break switching during tap transitions, meaning multiple adjacent taps connect briefly to RW/VW before settling. This causes a temporary reduction in effective RTOTAL - potentially halving resistance if crossing several taps rapidly. In precision voltage dividers, this introduces short-duration gain errors. Designers must avoid rapid successive INC pulses in critical analog paths and allow ≥5 µs stabilization (tIW max) after each step. The effect is absent in static configurations and does not impact long-term accuracy.
Is the X9015UM8Z pin-compatible with other members of the X9015 family, such as X9015US8Z?
Yes, the X9015UM8Z is pin-compatible with X9015US8Z and other X9015 variants in the same package type - but only within identical footprint families. X9015UM8Z (MSOP-8) shares identical pinout and electrical behavior with X9015US8Z (SOIC-8) *except* for package dimensions and thermal characteristics. Signal mapping (VCC, VSS, CS, INC, U/D, RH/VH, RL/VL, RW/VW) is identical across all X9015 variants. However, PCB layout must match the specific package: MSOP-8 (M8.118) vs. SOIC-8 (M8.15); no mechanical interchangeability exists without board redesign.
X9015UM8Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 32
- Resistance (Ohms):
- 50k
- Interface:
- Up/Down (U/D, INC, CS)
- Memory Type:
- Volatile
- Voltage - Supply:
- 5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±300ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
- Operating Temperature:
- 0°C ~ 70°C
- Resistance - Wiper (Ohms) (Typ):
- 200
X9015UM8Z FAQ
1.How can I place an order for X9015UM8Z through Aetrix?
Please submit a Request for Quotation (RFQ) for X9015UM8Z 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 X9015UM8Z reliable?
The price and inventory of X9015UM8Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9015UM8Z is usually 5 days.
3.What payment methods are accepted for X9015UM8Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9015UM8Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9015UM8Z?
X9015UM8Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9015UM8Z 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 X9015UM8Z?
For technical support, including X9015UM8Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9015UM8Z requirements.
6.How does Aetrix verify that X9015UM8Z is sourced from the original manufacturer or authorized distributors?
All X9015UM8Z 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 X9015UM8Z meets industry standards.
7.What is the process for return or replacement of X9015UM8Z?
All X9015UM8Z units undergo pre-shipment inspection (PSI). If there is an issue with X9015UM8Z, 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 X9015UM8Z part is unused and in its original packaging.
Return procedure for X9015UM8Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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