Packaging information
| Package | Pins SOT-23-THN (DDC) | 5 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the REF19
- Two outputs, VREF and VREF / 2, for convenient use in single-supply systems
- Excellent temperature drift performance:
- 25ppm/°C (maximum) from –40°C to 125°C
- High initial accuracy: ±0.1% (maximum)
- VREF and VBIAS tracking
overtemperature:
- 6ppm/°C (maximum) from –40°C to 85°C
- 7ppm/°C (maximum) from –40°C to 125°C
- Microsize package: SOT23-5
- Low dropout voltage: 10mV
- High output current: ±20mA
- Low quiescent current: 360µA
- Line regulation: 3ppm/V
- Load regulation: 8ppm/mA
Description for the REF19
Applications with only a positive supply voltage often require an additional stable voltage in the middle of the analog-to-digital converter (ADC) input range to bias input bipolar signals. The REF19xx provides a reference voltage (VREF) for the ADC and a second highly-accurate voltage (VBIAS) that can be used to bias the input bipolar signals.
The REF19xx offers excellent temperature drift (25ppm/°C, maximum) and initial accuracy (0.1%) on both the VREF and VBIAS outputs while operating at a quiescent current less than 430µA. In addition, the VREF and VBIAS outputs track each other with a precision of 6ppm/°C (maximum) across the temperature range from –40°C to 85°C. All these features increase the precision of the signal chain and decrease board space, while reducing the cost of the system as compared to a discrete design. Extremely low dropout voltage of only 10mV allows operation from very low input voltages, which can be very useful in battery-operated systems.
Both the VREF and VBIAS voltages have the same excellent specifications and can sink and source current equally well. Good long-term stability and low-noise levels make these devices designed for high-precision industrial applications.