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REF6125 Dataheets PDF



Part Number REF6125
Manufacturers Texas Instruments
Logo Texas Instruments
Description High-Precision Voltage Reference
Datasheet REF6125 DatasheetREF6125 Datasheet (PDF)

Product Folder Order Now Technical Documents Tools & Software Support & Community REF6125, REF6130, REF6133, REF6141, REF6145, REF6150 SBOS747B – MAY 2016 – REVISED AUGUST 2016 REF61xx High-Precision Voltage Reference With Integrated ADC Drive Buffer 1 Features •1 Excellent Temperature Drift Performance – 8 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 Im.

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Product Folder Order Now Technical Documents Tools & Software Support & Community REF6125, REF6130, REF6133, REF6141, REF6145, REF6150 SBOS747B – MAY 2016 – REVISED AUGUST 2016 REF61xx High-Precision Voltage Reference With Integrated ADC Drive Buffer 1 Features •1 Excellent Temperature Drift Performance – 8 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 REF61xx variants of REF6000 family specify a maximum temperature drift of just 8 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) REF61xx 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 Power Supply VIN REF61xx EN Bandgap Voltage Reference RFILT RLIM SS VIN Buffer + OUT_S OUT_F GND_S FILT GND_F CFILT RESR CL R VIN R R Power Supply + THS4521 R RF CF RF AINP AINN GND REF ADS8881 Copyright © 2016, Texas Instruments Incorporated Reference Droop comparison (1 LSB = 19.07 µV, With ADS8881 at 1 MSPS) 4 3 Regular Voltage Reference Droop Reference Droop (LSB) 2 1 0 ±1 REF61xx Droop ±2 ±3 ±4 0 200 400 600 800 1000 Time (µs) C04 1 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. REF6125, REF6130, REF6133, REF6141, REF6145, REF6150 SBOS747B – MAY 2016 – REVISED AUGUST 2016 www.ti.com Table of Contents 1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Device Comparison Table..................................... 3 6 Pin Configuration and Functions ......................... 3 7 Specifications......................................................... 4 7.1 Absolute Maximum Ratings ...................................... 4 7.2 ESD Ratings.............................................................. 4 7.3 Recommended Operating Conditions....................... 4 7.4 Thermal Information .................................................. 4 7.5 Electrical Characteristics.......................................... 5 7.6 Typical Characteristics .............................................. 7 8 Parameter Measurement Information ................ 14 8.1 Solder Heat Shift..................................................... 14 8.2 Thermal Hysteresis ................................................. 15 8.3 Reference Droop Measurements ............................ 16 8.4 1/f Noise Performance ............................................ 18 9 Detailed Description ............................................ 19 9.1 Overview ...............


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