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Renesas ISL90728UIE627Z-TK
- Part No.:
- ISL90728UIE627Z-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ISL90728UIE627Z-TK.pdf
- Description:
- IC DGTL POT 50KOHM 128TAP SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,915
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Product details
Overview
ISL90728UIE627Z-TK from Intersil is a volatile, single-channel, 128-tap digitally controlled potentiometer (XDCP™) with I²C interface, 50kΩ total resistance, ±20% tolerance, and 6-lead SC-70 package. It replaces mechanical potentiometers in precision analog adjustment circuits requiring stable wiper positioning, low temperature drift (±15 ppm/°C in divider mode), and rail-to-rail DCP terminal voltage (2.7V–5.5V). Used in LCD contrast control, RF amplifier biasing, and sensor transducer calibration.
For engineers reviewing the ISL90728UIE627Z-TK datasheet, ISL90728UIE627Z-TK pinout, ISL90728UIE627Z-TK application, or ISL90728UIE627Z-TK equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options for analog trimming and programmable gain/offset design.
Technical Context
The ISL90728UIE627Z-TK implements a 127-element resistor array with CMOS wiper switches controlled by a 7-bit volatile wiper register (WR), initialized to midscale (0x40) at power-up. Its I²C slave interface operates at up to 400kHz with open-drain SDA/SCL pins, fixed 7-bit address 0x7C (R/W bit appended), and supports volatile write/read only-no non-volatile storage.
It operates exclusively in two modes: voltage divider (RH–RW–RL) and rheostat (RW–RH or RW–RL). RH is the high terminal, RW is the wiper, RL is internally tied to GND, and VDD supplies both logic and DCP circuitry. Wiper resistance is 85–200Ω at VCC = 3.3V, and ratiometric tempco is ±15 ppm/°C in divider mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance (RTOTAL) | 50kΩ ±20% - sets full-scale analog range for gain/offset/bias networks |
| Wiper Tap Points | 128 positions (0x00–0x7F) - enables 7.8mV/LSB resolution in 3.3V divider with 50kΩ |
| I²C Address | 0x7C (7-bit) - avoids conflict with ISL90727 (0x5C) on shared bus |
| Supply Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic/system rails |
| Tempco (Divider Mode) | ±15 ppm/°C typical - ensures <0.1% resistance drift over –40°C to +85°C |
| Standby Current | 500nA max - enables ultra-low-power retention in battery-backed systems |
| Wiper Response Time | 500ns - supports fast dynamic reconfiguration without signal glitch |
Pinout & Package
6-lead SC-70 package (Pb-free, RoHS compliant, JEDEC MO203AB / EIAJ SC70); dimensions: 2.15mm × 1.35mm × 0.95mm (max height), thermal resistance θJA = 480°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Positive supply input | Powers internal logic and DCP array; must be decoupled near pin; no separate analog/digital rail required |
| 2 (GND) | Ground reference | Common return for VDD, I²C interface, and RL terminal; RL is internally connected to this pin |
| 3 (SCL) | I²C clock input | Open-drain, requires external pull-up; timing-critical for START/STOP/data hold setup per I²C spec |
| 4 (SDA) | I²C bidirectional data | Open-drain, shares pull-up with SCL; ACK/NACK behavior confirms register access success |
| 5 (RW) | Wiper terminal | Output node of adjustable divider/rheostat; 85–200Ω wiper resistance affects loading in precision circuits |
| 6 (RH) | High terminal | Fixed end of resistor array; voltage applied here defines upper rail of divider; not internally connected to VDD |
Key Features
| Feature | Design Value |
|---|---|
| Volatile wiper register | 7-bit WR resets to 0x40 at power-up - ensures repeatable midscale startup without external initialization |
| I²C-compatible interface | 400kHz max clock, fixed 0x7C address - simplifies integration into existing microcontroller-based control buses |
| Low tempco divider mode | ±15 ppm/°C typical - maintains linearity and ratio accuracy across industrial temperature range |
| Ultra-low standby current | 500nA max at 5.5V - extends battery life in portable sensor or display modules |
| SC-70 footprint | 6-lead, 2.15mm × 1.35mm - enables high-density analog trimming in space-constrained PCBs |
Applications
| LCD Contrast Adjustment | RF Amplifier Biasing |
|---|---|
|
Use Scenario: Fine-tuning contrast voltage in automotive or industrial LCD displays under varying ambient temperatures. IC Role / Device Role / Timing Role: Digitally programmable voltage divider between VDD and GND, with RW driving LCD VCOM or bias rail. Use Value: Replaces manual trimmer; enables factory calibration and firmware-driven contrast adaptation without hardware change. |
Use Scenario: Setting precise DC bias point for GaAs or SiGe RF power amplifier stages in wireless infrastructure. IC Role / Device Role / Timing Role: Rheostat configuration (RW–RH) adjusts gate/base current to control quiescent current and linearity. Use Value: Enables closed-loop bias compensation via MCU feedback, improving P1dB stability across temperature and process variation. |
| Sensor Transducer Calibration | Gain Control in Instrumentation Amplifiers |
|
Use Scenario: Nulling offset and scaling output of pressure or temperature sensors during production test and field recalibration. IC Role / Device Role / Timing Role: Voltage divider (RH–RW–RL) provides programmable reference or gain-setting network for op-amp conditioning stages. Use Value: Achieves <0.1% full-scale calibration accuracy with ±15 ppm/°C tempco-eliminates need for laser trimming or multiple fixed resistors. |
Use Scenario: Dynamically adjusting closed-loop gain of precision instrumentation amplifiers in medical or test equipment. IC Role / Device Role / Timing Role: Rheostat (RW–RH) placed in feedback path of op-amp to set gain ratio with digital control. Use Value: Supports 128-step gain selection (e.g., 1× to 100×) with monotonicity and <±0.2 LSB INL-enables auto-ranging without relay switching. |
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-50-R7 | Non-volatile EEPROM storage; 256-tap; SPI interface; 50kΩ; same SC-70-6 package | Retains wiper position after power cycle; requires SPI host instead of I²C | Choose when persistent settings are mandatory and SPI is available; not drop-in due to protocol and memory architecture differences |
| MCP4017T-503E/CH | Volatile; 64-tap; I²C; 50kΩ; SOT-23-6 package (pinout incompatible) | Lower resolution; higher wiper resistance (120Ω typ); different pin mapping (VDD/GND swapped vs. ISL90728) | Choose for cost-sensitive designs where 64-tap resolution suffices and board layout allows SOT-23-6 footprint change |
Compared with ISL90728UIE627Z-TK, AD5170BRJZ-50-R7 adds non-volatility at the cost of SPI-only interface and higher write latency, while MCP4017T-503E/CH offers I²C compatibility but sacrifices tap count, tempco performance, and pinout compatibility-requiring PCB redesign.
Availability
ISL90728UIE627Z-TK is available at Aetrix Electronics and suitable for LCD contrast control, RF amplifier biasing, sensor calibration, and instrumentation gain adjustment requiring stable component supply across industrial temperature range and long-term obsolescence management.
Supply support for ISL90728UIE627Z-TK 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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.
The ISL90727/ISL90728 XDCP™ family targets replacement of mechanical potentiometers in space-, power-, and reliability-constrained systems requiring digital programmability, low tempco, and minimal board area.
FAQ
What is the I²C address of the ISL90728UIE627Z-TK?
The ISL90728UIE627Z-TK uses a fixed 7-bit I²C slave address of 0x7C. This differs from the ISL90727 (0x5C), allowing both devices to coexist on the same bus. The R/W bit is appended externally during communication, so read operations use 0xFE and writes use 0xFD. Address is hardwired and not configurable.
Does the ISL90728UIE627Z-TK retain wiper position after power loss?
No, the ISL90728UIE627Z-TK is volatile-only: wiper position is stored in a RAM-based register that resets to 0x40 (midscale) on each power-up. It lacks EEPROM or other non-volatile storage. For persistent settings, consider alternatives like the AD5170BRJZ-50-R7.
Can the ISL90728UIE627Z-TK be used in rheostat mode?
Yes, the ISL90728UIE627Z-TK supports rheostat operation using RW and RH terminals (with RL tied to GND). In this configuration, resistance varies from ~0Ω to 50kΩ across 128 steps. Wiper resistance (85–200Ω) directly impacts minimum achievable resistance and must be accounted for in low-value rheostat designs.
What is the maximum operating voltage for DCP terminals on the ISL90728UIE627Z-TK?
The DCP terminals (RH, RW, RL) tolerate voltages from –0.3V to VDD, per absolute maximum ratings. With VDD = 5.5V, RH and RW may swing up to 5.5V relative to GND. Exceeding VDD or going below –0.3V risks latch-up or damage. RL is internally bonded to GND, so its voltage is fixed.
Is the ISL90728UIE627Z-TK RoHS compliant and lead-free?
Yes, the ISL90728UIE627Z-TK is Pb-free and RoHS compliant, using 100% matte tin (e3) termination finish. It meets IPC/JEDEC J-STD-020 reflow requirements for lead-free soldering and is rated MSL1. Full compliance documentation is available in Intersil's TB347 and TB363 technical briefs.
ISL90728UIE627Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- 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 ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 85
ISL90728UIE627Z-TK FAQ
1.How can I place an order for ISL90728UIE627Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL90728UIE627Z-TK 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 ISL90728UIE627Z-TK reliable?
The price and inventory of ISL90728UIE627Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL90728UIE627Z-TK is usually 5 days.
3.What payment methods are accepted for ISL90728UIE627Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL90728UIE627Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL90728UIE627Z-TK?
ISL90728UIE627Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL90728UIE627Z-TK 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 ISL90728UIE627Z-TK?
For technical support, including ISL90728UIE627Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL90728UIE627Z-TK requirements.
6.How does Aetrix verify that ISL90728UIE627Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL90728UIE627Z-TK 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 ISL90728UIE627Z-TK meets industry standards.
7.What is the process for return or replacement of ISL90728UIE627Z-TK?
All ISL90728UIE627Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL90728UIE627Z-TK, 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 ISL90728UIE627Z-TK part is unused and in its original packaging.
Return procedure for ISL90728UIE627Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL90728UIE627Z-TK Tags
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MCP4018T-103E/LT
Microchip Technology
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MCP4018T-503E/LT
Microchip Technology
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MCP4011T-103E/SN
Microchip Technology
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MCP4018T-104E/LT
Microchip Technology
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MCP4017T-503E/LT
Microchip Technology
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MCP4018T-502E/LT
Microchip Technology
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MCP4017T-103E/LT
Microchip Technology
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MCP4531T-103E/MF
Microchip Technology
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MCP4021T-202E/SN
Microchip Technology
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MCP4023T-103E/CH
Microchip Technology
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MCP4022T-503E/CH
Microchip Technology
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MCP4551T-502E/MS
Microchip Technology
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