REF6241 Series
4.096-V, 3-ppm/°C high-precision voltage reference with integrated buffer & enable pin
Manufacturer: Texas Instruments
Catalog
4.096-V, 3-ppm/°C high-precision voltage reference with integrated buffer & enable pin
Key Features
• Excellent Temperature Drift Performance3 ppm/°C (max) from 0°C to +70°CExtremely Low NoiseTotal Noise: 5 µVRMSWith 47-µF Capacitor1/f Noise (0.1 Hz to 10 Hz): 3 µVPP/VIntegrated ADC Drive BufferLow Output Impedance: < 50 mΩ (0-200 kHz)First Sample Precise to 18 Bits WithADS8881Enables Burst-Mode DAQ SystemsLow Supply Current: 820 µALow Shutdown Current: 1 µAHigh Initial Accuracy: ±0.05%Very-Low Noise and DistortionSNR: 100.5 dB, THD: –125 dB (ADS8881)SNR: 106 dB, THD: –120 dB (ADS127L01)Output Current Drive: ±4 mAProgrammable Short-Circuit CurrentVerified to Drive REF Pin ofADS88xx familyof SAR ADCs andADS127xx familyof Wideband ΔΣ ADCsExcellent Temperature Drift Performance3 ppm/°C (max) from 0°C to +70°CExtremely Low NoiseTotal Noise: 5 µVRMSWith 47-µF Capacitor1/f Noise (0.1 Hz to 10 Hz): 3 µVPP/VIntegrated ADC Drive BufferLow Output Impedance: < 50 mΩ (0-200 kHz)First Sample Precise to 18 Bits WithADS8881Enables Burst-Mode DAQ SystemsLow Supply Current: 820 µALow Shutdown Current: 1 µAHigh Initial Accuracy: ±0.05%Very-Low Noise and DistortionSNR: 100.5 dB, THD: –125 dB (ADS8881)SNR: 106 dB, THD: –120 dB (ADS127L01)Output Current Drive: ±4 mAProgrammable Short-Circuit CurrentVerified to Drive REF Pin ofADS88xx familyof SAR ADCs andADS127xx familyof Wideband ΔΣ ADCs
Description
AI
The voltage references in the REF6000 family have an integrated low output impedance buffer that enables the user to directly drive the reference (REF) pin of precision data converters, while preserving linearity, distortion, and noise performance. Most precision SAR and delta-sigma analog-to-digital converters (ADCs), switch binary-weighted capacitors onto the REF pin during the conversion process. In order to support this dynamic load, the output of the voltage reference must be buffered with a low-output impedance, high-bandwidth buffer. The REF6000 family devices are well suited, but not limited, to drive the REF pin of theADS88xx familyof SAR ADCs, andADS127xx familyof delta-sigma ADCs, as well as precision digital-to-analog converters (DACs).
The REF6000 family of is able to maintain an output voltage within 1LSB (18-bit) with minimal droop, even during the first conversion while driving the REF pin of the ADS8881. This feature is useful in burst-mode, event-triggered, equivalent-time sampling, and variable-sampling-rate data-acquisition systems. The REF62xx variants of REF6000 family specify a maximum temperature drift of just 3 ppm/°C and initial accuracy of 0.05% for both the voltage reference and the low output impedance buffer combined. For various temperature drift options in REF6000 family, see theDevice Comparison Table.
The voltage references in the REF6000 family have an integrated low output impedance buffer that enables the user to directly drive the reference (REF) pin of precision data converters, while preserving linearity, distortion, and noise performance. Most precision SAR and delta-sigma analog-to-digital converters (ADCs), switch binary-weighted capacitors onto the REF pin during the conversion process. In order to support this dynamic load, the output of the voltage reference must be buffered with a low-output impedance, high-bandwidth buffer. The REF6000 family devices are well suited, but not limited, to drive the REF pin of theADS88xx familyof SAR ADCs, andADS127xx familyof delta-sigma ADCs, as well as precision digital-to-analog converters (DACs).
The REF6000 family of is able to maintain an output voltage within 1LSB (18-bit) with minimal droop, even during the first conversion while driving the REF pin of the ADS8881. This feature is useful in burst-mode, event-triggered, equivalent-time sampling, and variable-sampling-rate data-acquisition systems. The REF62xx variants of REF6000 family specify a maximum temperature drift of just 3 ppm/°C and initial accuracy of 0.05% for both the voltage reference and the low output impedance buffer combined. For various temperature drift options in REF6000 family, see theDevice Comparison Table.
