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Series voltage references

REF6045

ACTIVE

4.5-V, 5-ppm/°C high-precision voltage reference with integrated buffer & enable pin

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Data sheet

REF6045

ACTIVE
Data sheet Order now

Product details

VO (V) 4.5 Initial accuracy (max) (%) 0.05 Temp coeff (max) (ppm/°C) 5 Vin (min) (V) 4.75 Vin (max) (V) 5.5 Iq (typ) (mA) 0.83 Rating Catalog Features Integrated low-output impedance buffer LFN 0.1 to 10 Hz (typ) (µVPP) 13.5 Iout/Iz (max) (mA) 3.5 Operating temperature range (°C) -40 to 125 Shutdown current (ISD) (typ) (µA) 1
VO (V) 4.5 Initial accuracy (max) (%) 0.05 Temp coeff (max) (ppm/°C) 5 Vin (min) (V) 4.75 Vin (max) (V) 5.5 Iq (typ) (mA) 0.83 Rating Catalog Features Integrated low-output impedance buffer LFN 0.1 to 10 Hz (typ) (µVPP) 13.5 Iout/Iz (max) (mA) 3.5 Operating temperature range (°C) -40 to 125 Shutdown current (ISD) (typ) (µA) 1
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • 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
  • 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

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.

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.
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Technical documentation

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Type Title Date
* Data sheet REF60xx High-Precision Voltage Reference With Integrated ADC Drive Buffer datasheet (Rev. B) PDF | HTML 29 Aug 2016
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
User guide ADS8881EVMV2-PDK User's Guide (Rev. A) 04 Oct 2017
User guide ADS8881EVMV2-PDK User's Guide 08 May 2017
White paper Voltage-reference impact on total harmonic distortion 01 Aug 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

ADS8881EVMV2-PDK — ADS8881 18-Bit 1MSPS Serial-Interface SAR ADC Evaluation Module V2 PDK

The ADS8881EVMV2-PDK is an evaluation platform for the ADS8881 successive approximation register (SAR) analog-to-digital converter (ADC). The evaluation kit includes the ADS8881 EVMV2 board, the PHI controller board, and accompanying computer software that enables the user to communicate with (...)
User guide: PDF
Not available on TI.com
Evaluation board

REF6025EVM-PDK — REF6025 voltage reference evaluation module

The REF6025EVM-PDK is a platform for evaluating the performance of the REF6025 voltage reference. The evaluation kit brings out the burst mode performance of the device which is a key feature of the device.
User guide: PDF
Not available on TI.com
Simulation model

REF6045 TINA-TI Reference Design (Rev. A)

SBOM993A.ZIP (22 KB) - TINA-TI Reference Design
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Simulation model

REF6045 TINA-TI Transient Spice Model

SBOM992.ZIP (31 KB) - TINA-TI Spice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

TIPD113 — Data acquisition, 10-kHz AC, 35-mW 18-bit 1-MSPS reference design

This verified design is a high performance data acquisition system (DAQ) using an 18-bit SAR ADC, ADS8881 at a throughput of 1MSPS. This design has been optimized to provide the lowest power solution for a full scale input sine wave of 10 KHz. At a total power consumption of less than 35mW, this (...)
User guide: PDF
Schematic: PDF
Reference designs

TIPD112 — Data Acquisition for MUX and Step Inputs, 18 bits, 1uS Full Scale Response Reference Design

This verified design is a high performance data acquisition system (DAQ) using an 18-bit SAR ADC, ADS8881 at a throughput of 1MSPS. This design has been optimized to provide 18-bit settling performance for a Full Scale Step Input signal, thus leading to excellent system linearity. Such an input (...)
User guide: PDF
Schematic: PDF
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