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REF6041IDGKR Datasheet(PDF) 1 Page - Texas Instruments |
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REF6041IDGKR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 37 page Bandgap Voltage Reference CFILT CL RESR RFILT Buffer + VIN OUT_S OUT_F FILT VIN GND_S GND_F Power Supply SS REF60xx RLIM EN GND REF + VIN R R R Power Supply RF RF R CF THS4521 AINP AINN ADS8881 Copyright © 2016, Texas Instruments Incorporated ±4 ±3 ±2 ±1 0 1 2 3 4 0 200 400 600 800 1000 Time (µs) C042 Regular Voltage Reference Droop REF60xx Droop Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. REF6025, REF6030, REF6033, REF6041, REF6045, REF6050 SBOS708B – MAY 2016 – REVISED AUGUST 2016 REF60xx High-Precision Voltage Reference With Integrated ADC Drive Buffer 1 1 Features 1 • Excellent Temperature Drift Performance – 5 ppm/°C (max) from –40°C to +125°C • Extremely Low Noise – Total Noise: 5 µVRMS With 47-µF Capacitor – 1/f Noise (0.1 Hz to 10 Hz): 3 µVPP/V • Integrated ADC Drive Buffer – Low Output Impedance: < 50 mΩ (0-200 kHz) – First Sample Precise to 18 Bits With ADS8881 – Enables Burst-Mode DAQ Systems • Low Supply Current: 820 μA • Low Shutdown Current: 1 µA • High Initial Accuracy: ±0.05% • Very-Low Noise and Distortion – SNR: 100.5 dB, THD: –125 dB (ADS8881) – SNR: 106 dB, THD: –120 dB (ADS127L01) • Output Current Drive: ±4 mA • Programmable Short-Circuit Current • Verified to Drive REF Pin of ADS88xx family of SAR ADCs and ADS127xx family of Wideband ΔΣ ADCs 2 Applications • ATE Testers and Oscilloscopes • Test and Measurement Equipment • Analog Input Modules for PLCs • Medical Equipment • Precision Data Acquisition Systems 3 Description The REF6000 family of voltage references have an integrated low output impedance buffer that enable the user to directly drive the REF pin of precision data converters, while preserving linearity, distortion, and noise performance. Most precision SAR and Delta-Sigma 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 other digital-to-analog converters (DACs). The REF6000 family of voltage references are 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 REF60xx variants of REF6000 family specify a maximum temperature drift of just 5 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. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) REF60xx VSSOP (8) 3.00 mm x 3.00 mm (1) For all available packages, see the package option addendum at the end of the data sheet. Typical Application Reference Droop comparison (1 LSB = 19.07 µV, With ADS8881 at 1 MSPS) |
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