Features
- Reference output voltage option
- 1.25V, 2.5V, 5.0V, and 7.5V
- Initial accuracy:
- ISL21090-12: ±0.03%
- ISL21090-25: ±0.02%
- ISL21090-50: ±0.025%
- ISL21090-75: ±0.035%
- Output voltage noise (0.1Hz to 10Hz): 1.0µVP-P typ (1.25V option)
- Supply current : 750µA (1.25V option)
- Temperature coefficient: 7ppm/°C max
- Output current capability: 20mA
- Line regulation: 6ppm/V (1.25V option)
- Load regulation: 2.5ppm/mA (1.25V option)
- Operating temperature range: -40 °C to +125 °C
Description
The ISL21090 is an ultra-low noise, high DC accuracy precision voltage reference with a wide input voltage range. The ISL21090 uses Renesas' Advanced Bipolar technology to achieve sub 1.0µVP-P (1.25V option) 0.1Hz to 10Hz noise with an initial voltage accuracy of 0.02% (2.5V option). The ISL21090 offers 1.25V, 2.5V, 5.0V, and 7.5V output voltage options with a 7ppm/°C temperature coefficient and also provides excellent line and load regulation. These devices are offered in an 8 Ld SOIC package. The ISL21090 is ideal for high-end instrumentation, data acquisition and processing applications requiring high DC precision where low noise performance is critical.
Parameters
| Attributes | Value |
|---|---|
| VOUT (V) | 2.5 |
| Supply Voltage Vs Range | 3.7 to 36 |
| Technology | Bipolar |
| Temperature Coefficient (ppm/°C) | 7 |
| Initial Accuracy (% Vout) (% Vout) | 0.02 |
| IS (mA) | 1.28 |
| ISINK (Max) (mA) | 10 |
| ISOURCE (Max) (mA) | 20 |
| Output Noise (Typical) | 1.9 µVPP |
| Low Frequency Noise (µVPP) | 1.9 |
| LTD Stability (ppm) | 20 |
| Initial Accuracy (mV (±)) (mV (±)) | 0.5 |
| VS (Min) (V) | 3.7 |
| VS (Max) (V) | 36 |
| Qualification Level | Standard |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| SOICN | 4.9 x 3.9 x 0.00 | 8 | 1.3 |
Application Block Diagrams
 | Industrial Precision Temperature Control This system is ideal for industrial control processes providing accurate temperature measurements with a minimal number of components. |
Additional Applications
- High-end instrumentation
- Precision voltage sources for data acquisition system,
- industrial control, communication infrastructure
- Process control and instrumentations
- Active source for sensors
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Renesas Boards & Kits
Ultra-Low Noise, Precision Voltage Reference Evaluation Boards
The ISL21090xxEV1Z evaluation board is designed to measure the performance of the high-precision ISL21090 voltage references. The reference has a wide input voltage range from 3.7V to 36V and an initial accuracy of 0.02% (2.5V option). The voltage noise of less than 2µVP-P in the 0.1Hz to 10Hz... Read More
DAQ on a Stick with Semitec RTD Temperature Sensor Reference Design
This reference design shows the operation of Renesas' precision products in a temperature sensor application. The application uses Renesas' data acquisition (DAQ) on a stick reference design that has been modified to work with a Semitec 103AP-2 RTD temperature sensor. The system operates over... Read More
Knowledge Base
-
Is it possible to use the ISL21090 without a compensation capacitor?
It is possible to use these voltage references without a compensation capacitor if the output capacitance is under 100pF for ISL21090B12 (1.25 VOUT version). For the other versions (2.5V, 5.0V and 7.5V) the output capacitance must be either under 100pF or between 50nF to 100nF. However ...
Jul 23, 2025 -
ISL21090 Recommended Compensation Capacitor
The recommended value varies with the output capacitance. The following tables show the recommended values. 1.25 VOUT Cout (uF) Ccomp (nF) 0.1 1 1 10 10 30 2.5, 5.0 and 7.5 VOUT Options Cout (uF) Ccomp (nF) 0.1 1 1 1 10 10 Suitable ...
Jul 23, 2025
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