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Renesas ISL90728WIE627Z-T7A
- Part No.:
- ISL90728WIE627Z-T7A
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ISL90728WIE627Z-T7A.pdf
- Description:
- IC DGTL POT 10KOHM 128TAP SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
ISL90728WIE627Z-T7A from Renesas Electronics (formerly Intersil) is a volatile, I²C-compatible digitally controlled potentiometer (XDCP™) with 128-tap resolution, 10kΩ total resistance, and SC-70-6 package. It functions as a precision programmable resistor divider or rheostat in analog signal conditioning paths, supporting voltage range 2.7V to 5.5V and operating from –40°C to +85°C. Its wiper position is set via I²C address 0x7C and features power-on midscale preset.
For engineers reviewing the ISL90728WIE627Z-T7A datasheet, ISL90728WIE627Z-T7A pinout, ISL90728WIE627Z-T7A application, or ISL90728WIE627Z-T7A equivalent, key selection considerations include its 128-tap monotonicity, ±15 ppm/°C ratiometric tempco in divider mode, 70Ω typical wiper resistance at 3.3V, 200µA active current, and compatibility with standard I²C bus timing up to 400kHz.
Technical Context
The ISL90728WIE627Z-T7A implements a 127-element resistor array with CMOS wiper switches controlled by a 7-bit volatile wiper register (WR), enabling precise digital positioning of the RW terminal between RH and RL. Its I²C slave interface uses open-drain SDA/SCL pins with defined timing margins (tLOW ≥1300ns, tHIGH ≥600ns) and supports read/write operations using fixed 7-bit addresses (0x7C for ISL90728).
It operates exclusively in volatile mode: wiper position resets to 0x40 (midscale) on power-up, with no non-volatile storage. The device exhibits monotonic behavior across all taps in both voltage divider and rheostat configurations, with integral non-linearity ≤±0.2 LSB and differential non-linearity ≤±0.1 LSB under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance (RTOTAL) | 10kΩ - defines full-scale resistance between RH and RL terminals; determines gain/attenuation scaling in divider or biasing applications. |
| Wiper Resistance (RW) | 70Ω typical at VCC = 3.3V - impacts minimum achievable resistance in rheostat mode and introduces small offset in divider output. |
| Ratiometric Tempco | ±15 ppm/°C typical - ensures stable voltage division ratio over temperature, critical for sensor calibration and reference trimming. |
| I²C Address | 0x7C (7-bit) - enables multi-device bus configuration without conflict with ISL90727 (0x5C); requires external pull-ups per I²C spec. |
| Supply Current | 200µA max active, 500nA max standby - supports low-power embedded systems and battery-backed circuits. |
| Wiper Tap Resolution | 128 positions (0x00–0x7F) - provides ~0.78% step resolution for fine analog adjustment in closed-loop control or calibration. |
| Power-on Default | Wiper at 0x40 (64 decimal) - places RW at midscale (50% of RTOTAL), ensuring predictable startup behavior in gain/offset circuits. |
Pinout & Package
ISL90728WIE627Z-T7A is housed in a Pb-free, RoHS-compliant 6-lead SC-70 package (JEDEC MO203AB, Intersil P6.049), measuring 2.15mm × 1.35mm × 0.95mm with 0.65mm lead pitch. Thermal resistance θJA = 480°C/W enables operation in compact industrial PCB layouts without forced cooling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Positive supply input | Accepts 2.7V–5.5V; powers internal logic and resistor array; must be decoupled locally for noise immunity. |
| 2 - GND | Ground reference | Common return for DCP and I²C interface; connects RL internally; requires low-impedance path to system ground. |
| 3 - SCL | I²C clock input | Open-drain, requires external pull-up; controls data sampling edge; timing-critical for reliable register access. |
| 4 - SDA | I²C bidirectional data line | Open-drain, shared bus node; transmits address/data and receives ACK; must meet rise/fall time specs (tR/tF ≤250ns). |
| 5 - RW | Wiper terminal | Variable output node; resistance to RL increases linearly with WR value; used as adjustable tap in feedback or bias networks. |
| 6 - RH | High terminal | Fixed end of resistor string; connected to VDD or external reference; forms upper leg of voltage divider with RW and RL. |
Key Features
| Feature | Design Value |
|---|---|
| Volatile XDCP architecture | Eliminates EEPROM wear-out concerns and write-cycle delays; ideal for dynamic real-time calibration where settings change frequently. |
| Monotonic 128-tap performance | Guarantees no output glitches during wiper stepping; essential for stable loop control in RF amplifier biasing and sensor signal chains. |
| Low ratiometric temperature coefficient | ±15 ppm/°C ensures <0.13% divider ratio drift over –40°C to +85°C, enabling high-accuracy transducer compensation without recalibration. |
| I²C-compatible interface | Supports standard 400kHz Fast Mode timing with defined setup/hold margins; integrates seamlessly into microcontroller-based systems without custom logic. |
| Ultra-low standby current | 500nA max allows permanent connection in always-on instrumentation; reduces quiescent power in portable sensor nodes and IoT endpoints. |
Applications
| RF Amplifier Biasing | LCD Brightness Control |
|---|---|
|
Use Scenario: Setting precise DC bias voltage for GaAs FET or LDMOS power amplifiers in wireless infrastructure and test equipment. IC Role / Device Role / Timing Role: Digitally programmable rheostat configuring gate voltage; replaces mechanical trimmer requiring manual recalibration after thermal cycling. Use Value: Enables factory and field calibration via firmware; maintains stable bias point across temperature due to ±15 ppm/°C ratiometric tempco. |
Use Scenario: Adjusting backlight LED current or contrast voltage in industrial HMIs, medical displays, and automotive infotainment panels. IC Role / Device Role / Timing Role: Voltage divider setting reference for PWM dimming circuit or op-amp gain stage controlling display luminance. Use Value: Provides smooth, repeatable brightness steps via I²C commands; eliminates mechanical wear and contamination issues of panel-mounted pots. |
| Sensor Transducer Calibration | Offset/Gain Trim in Signal Conditioning |
|
Use Scenario: Compensating zero-point and span errors in pressure, temperature, and optical sensors used in process control and environmental monitoring. IC Role / Device Role / Timing Role: Precision voltage divider trimming sensor bridge output or ADC reference; updated during production test or periodic self-calibration. Use Value: Achieves <±0.2 LSB INL and monotonic response, ensuring measurement linearity; volatile nature allows safe reset on power cycle. |
Use Scenario: Fine-tuning op-amp gain and DC offset in analog front-ends for data acquisition, motor control, and power supply monitoring. IC Role / Device Role / Timing Role: Programmable feedback resistor network or reference divider in instrumentation-grade amplifiers and comparators. Use Value: Delivers 70Ω low wiper resistance and 128-step resolution for sub-1mV offset correction; compatible with 3.3V/5V MCU I/O levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5170BRJZ-10-R7 | Non-volatile EEPROM storage; 256-tap resolution; SPI interface; 10kΩ RTOTAL; higher wiper resistance (120Ω typ). | Supports power-loss retention of last setting; unsuitable where volatile reset-to-midscale is required for safety or repeatability. | Select when persistent wiper position is mandatory; avoid if deterministic startup behavior is critical. |
| MCP4017T-103E/OT | Volatile design; 64-tap resolution; I²C interface; 10kΩ RTOTAL; higher tempco (±100 ppm/°C); no midscale power-on default. | Lower resolution and poorer temperature stability limit use in precision sensor calibration; lacks guaranteed startup state. | Choose for cost-sensitive, non-critical biasing where 64-step granularity suffices and tempco is less constrained. |
Compared with AD5170BRJZ-10-R7 and MCP4017T-103E/OT, the ISL90728WIE627Z-T7A offers superior ratiometric stability (±15 ppm/°C vs. ±100 ppm/°C), guaranteed midscale power-on reset, and lower wiper resistance-making it optimal for high-accuracy, dynamically calibrated analog systems where volatility is acceptable.
Availability
ISL90728WIE627Z-T7A is available at Aetrix Electronics and suitable for RF amplifier biasing, LCD brightness control, sensor calibration, and analog signal conditioning requiring stable component supply across industrial, medical, and test equipment designs.
Supply support for ISL90728WIE627Z-T7A 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
Renesas Electronics Corporation, formed through the integration of Intersil, delivers high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The ISL90728WIE627Z-T7A belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in precision analog adjustment applications requiring I²C configurability and temperature-stable performance.
FAQ
What is the I²C address of the ISL90728WIE627Z-T7A and how does it differ from ISL90727?
The ISL90728WIE627Z-T7A uses a fixed 7-bit I²C slave address of 0x7C (binary 0111110), while the ISL90727 uses 0x5C (binary 0101110). This hardwired distinction allows both devices to coexist on the same I²C bus without address conflict. The ISL90728WIE627Z-T7A datasheet confirms this address is not user-programmable and requires no external address pins or jumpers.
Does the ISL90728WIE627Z-T7A retain its wiper position after power cycling?
No, the ISL90728WIE627Z-T7A is a volatile digitally controlled potentiometer: its 7-bit wiper register resets to 0x40 (midscale) on every power-up. It contains no non-volatile memory. This behavior is explicitly documented in the "Principles of Operation" section of the FN8247 datasheet and ensures predictable startup in safety-critical or calibration-sensitive circuits.
What is the maximum operating voltage and temperature range for the ISL90728WIE627Z-T7A?
The ISL90728WIE627Z-T7A operates from 2.7V to 5.5V supply voltage and is rated for –40°C to +85°C ambient temperature. These limits are specified in the "Recommended Operating Conditions" table (Page 3) of the FN8247 datasheet and validated across production testing. Exceeding 5.5V may damage the device, as absolute maximum VCC is +7V but not functional.
Can the ISL90728WIE627Z-T7A be used in rheostat mode, and what is its wiper resistance?
Yes, the ISL90728WIE627Z-T7A supports rheostat configuration using RH and RW terminals (with RL tied to GND). Its typical wiper resistance is 70Ω at VCC = 3.3V and +25°C, with a maximum of 200Ω across temperature and voltage ranges. This value is measured between RW and the internal switch matrix, directly affecting minimum achievable resistance in variable current-limiting applications.
How does the temperature coefficient of the ISL90728WIE627Z-T7A compare between divider and rheostat modes?
In voltage divider mode, the ISL90728WIE627Z-T7A exhibits a ratiometric temperature coefficient of ±15 ppm/°C typical, ensuring stable output ratio. In rheostat mode (RH–RW or RW–RL), the resistance temperature coefficient is ±45 ppm/°C typical. These values are explicitly differentiated in the "Analog Specifications" table (Page 3) and reflect distinct physical mechanisms governing each configuration.
ISL90728WIE627Z-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 1
- Number of Taps:
- 128
- Resistance (Ohms):
- 10k
- 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 ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 85
ISL90728WIE627Z-T7A FAQ
1.How can I place an order for ISL90728WIE627Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL90728WIE627Z-T7A 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 ISL90728WIE627Z-T7A reliable?
The price and inventory of ISL90728WIE627Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL90728WIE627Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL90728WIE627Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL90728WIE627Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL90728WIE627Z-T7A?
ISL90728WIE627Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL90728WIE627Z-T7A 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 ISL90728WIE627Z-T7A?
For technical support, including ISL90728WIE627Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL90728WIE627Z-T7A requirements.
6.How does Aetrix verify that ISL90728WIE627Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL90728WIE627Z-T7A 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 ISL90728WIE627Z-T7A meets industry standards.
7.What is the process for return or replacement of ISL90728WIE627Z-T7A?
All ISL90728WIE627Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL90728WIE627Z-T7A, 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 ISL90728WIE627Z-T7A part is unused and in its original packaging.
Return procedure for ISL90728WIE627Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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