REF6225IDGKT Part Information
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 the ADS88xx family of SAR ADCs, and ADS127xx family of 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 the Device Comparison Table.
- Excellent Temperature Drift Performance u2013 3 ppm/u00b0C (max) from 0u00b0C to +70u00b0C
- Extremely Low Noise u2013 Total Noise: 5 u00b5VRMS With 47-u00b5F Capacitor u2013 1/f Noise (0.1 Hz to 10 Hz): 3 u00b5VPP/V
- High Initial Accuracy: u00b10.05%
- Integrated ADC Drive Buffer u2013 Low Output Impedance: < 50 mu03a9 (0-200 kHz) u2013 First Sample Precise to 18 Bits With ADS8881 u2013 Enables Burst-Mode DAQ Systems
- Low Shutdown Current: 1 u00b5A
- Low Supply Current: 820 u03bcA
- Output Current Drive: u00b14 mA
- Programmable Short-Circuit Current
- Verified to Drive REF Pin of ADS88xx family of
- Very-Low Noise and Distortion u2013 SNR: 100.5 dB, THD: u2013125 dB (ADS8881) u2013 SNR: 106 dB, THD: u2013120 dB (ADS127L01)
|Voltage Reference Type||Series - Fixed|
|Product Range||REF62xx Series|
|Voltage Reference Case Style||VSSOP|
|No. of Pins||8Pins|
|Operating Temperature Min||0°C|
|Operating Temperature Max||70°C|
|Automotive Qualification Standard||-|
|RoHS Phthalates Compliant||Yes|
|MSL||MSL 2 - 1 year|
|SVHC||No SVHC (27-Jun-2018)|
Alternative Part Descriptions
- 2.5-V, 3-ppm/°C high-precision voltage reference with integrated buffer & enable pin | Texas Instruments
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