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 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 offers excellent temperature drift
(8 ppm/°C, max) 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 6 ppm/°C (max) across the temperature range of –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 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 industrial applications.
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Part number | Order | VO (V) | Initial accuracy (Max) (%) | Temp coeff (Max) (ppm/ degree C) | Rating | Operating temperature range (C) | Iout/Iz (Max) (mA) | Iq (Typ) (uA) | Shutdown current (Typ) (uA) | Iq (Max) (uA) | Features | Package Group | Vin (Min) (V) | Vin (Max) (V) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
REF2025 |
|
2.5
1.25 |
0.05 | 8 | Catalog | -40 to 125 | 20 | 360 | 3.3 | 430 |
Multiple outputs
Enable pin |
SOT-23-THIN | 5 | 2.52 | 5.5 |
REF2030 |
|
3
1.5 |
0.05 | 8 | Catalog | -40 to 125 | 20 | 360 | 3.3 | 430 |
Multiple outputs
Enable pin |
SOT-23-THIN | 5 | 3.02 | 5.5 |
REF2033 |
|
3.3
1.65 |
0.05 | 8 | Catalog | -40 to 125 | 20 | 360 | 3.3 | 430 |
Multiple outputs
Enable pin |
SOT-23-THIN | 5 | 3.32 | 5.5 |
REF2041 |
|
4.096
2.048 |
0.05 | 8 | Catalog | -40 to 125 | 20 | 360 | 3.3 | 430 |
Multiple outputs
Enable pin |
SOT-23-THIN | 5 | 4.116 | 5.5 |