REF20-Q1中文资料Automotive low-drift, low-power, series voltage reference数据手册TI规格书

描述 Description

Applications with only a positive supply voltage often require additional stable voltage in the middle of the analog-to-digital converter (ADC) input range to bias input bipolar signals. The REF20xx-Q1 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 REF20xx-Q1 offers excellent temperature drift (8 ppm/°C, maximum) and initial accuracy (0.05%) on both the VREF and VBIAS outputs while operating at a quiescent current less than 430 µA. In addition, the VREF and VBIAS outputs track each other with a precision of 7 ppm/°C (maximum) across the temperature range of –40°C to 125°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 solution. Extremely low dropout voltage of only 10 mV 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. Very good long-term stability and low noise levels make these devices ideally-suited for high-precision applications.

特性 Features

• AEC-Q100 qualified with the following results:
• Device HBM ESD classification level 2
• Functional Safety-Capable
• Two Outputs, VREF and VREF / 2, for convenient use in single-supply systems
• 8 ppm/°C (maximum) from –40°C to 125°C
• High initial accuracy: ±0.05% (maximum)
• 7 ppm/°C (maximum) from –40°C to 125°C
• Microsize package: SOT23-5
• High output current: ±20 mA
• Line regulation: 3 ppm/V
• Load regulation: 8 ppm/mA