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LINEAR TECHNOLOGY LTC6652 User Guide

Summary

Linear Technology LTC6652 precision voltage reference datasheet documenting this low-drift buffered series reference fully specified over -40C to 125C for automotive and high-temperature industrial applications. Features A Grade 5ppm/C maximum drift with high-order curvature compensation, +/-0.05% initial accuracy, and 2ppm peak-to-peak low-frequency noise (0.1Hz to 10Hz). Sinks and sources +/-5mA output current with 300mV low dropout voltage from supplies up to 13.2V. Micropower shutdown mode d

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LTC6652

Precision Low Drift Low Noise Buffered Reference

FEATURES DESCRIPTION n Low Drift: A Grade 5ppm/°C Max

The LTC®6652 is a precision, low drift, low noise reference

B Grade 10ppm/°C Max that is fully specifi ed over the –40°C to 125°C temperature n High Accuracy: A Grade ±0.05%, B Grade ±0.1%

range, making it an ideal choice for automotive or high

n Low Noise: 2ppmp-p (0.1Hz to 10Hz)

temperature applications. High order curvature compen-

n Fully Specifi ed Over –40°C to 125°C Temperature

sation allows this reference to achieve a low drift of less

Range than 5ppm/°C with a predictable temperature characteristic n Sinks and Sources Current: ±5m A

and an output voltage accuracy of ±0.05%

n Low Power Shutdown: <2μA Maximum

The LTC6652 low dropout series reference can be

n Low Dropout: 300m V

powered from a 13.2V supply and run down to 300m V

n No External Load Capacitor Required

above the output voltage. The LTC6652 reference comes

n Wide Supply Range to 13.2V

in an MSOP package. It boasts low noise, excellent load

n 8-Lead MSOP Package

regulation, source and sink capabilities and exceptional

FE LT

line rejection, making it a superior choice for demanding

APPLICATIONS

precision applications. It also has a shutdown mode for low

n Automotive Control and Monitoring power applications and no output capacitor is required. n High Temperature Industrial

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. n High Resolution Data Acquisition Systems All other trademarks are the property of their respective owners.

n Instrumentation and Process Control

n Precision Regulators

n Medical Equipment

TYPICAL APPLICATION

Output Voltage Temperature Drift 2.502

Basic Connection

2.8V ≤ VIN ≤ 13.2V LTC6652-2.5 VOUTVIN

COUT 2.500

GNDSHDN 1μF

(OPTIONAL) 6652 TA01a 2.499

TEMPERATURE (°C)

6652 TA01b

Page Summary Contents For LINEAR TECHNOLOGY LTC6652 User Guide

Page 1 LTC6652 Precision Low Drift Low Noise Buffered Reference FEATURES DESCRIPTION n Low Drift: A Grade 5ppm/°C Max The LTC®6652 is a precision, low drift, low noise reference B Grade 10ppm/°C Max that is ...
Page 2 LTC6652 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Input Voltage DNC GND* VIN to GND .......................................... –0.3V to 13.2V VIN GND* SHDN VOUT SHDN to GND ...........
Page 3 LTC6652 ELECTRICAL CHARACTERISTICS The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C, VIN = VOUT + 0.5V, unless otherw...
Page 4 FE LT LY JE IO IO LT LTC6652 TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage Temperature Drift Line Regulation Load Regulation (Sourcing) 2.5010 2.5010 3 TYPICAL PARTS 2.4995 –120 LT –40°C LY TEMPE...
Page 5 LTC6652 TYPICAL PERFORMANCE CHARACTERISTICS Minimum VOUT-VIN Differential Low Frequency 0.1Hz to 10Hz (Sinking) Transient Noise Output Voltage Noise Spectrum IS /D IV 0.1 0.001 0.01 0.1 TIME (1 SECOND...
Page 6 LTC6652 PIN FUNCTIONS DNC (Pin 1): Do Not Connect. GND (Pin 4): Device Ground. VIN (Pin 2): Power Supply. The minimum supply input is VOUT (Pin 6): Output Voltage. An output capacitor is not 2.8V. The...
Page 7 LTC6652 APPLICATIONS INFORMATION LTC6652-2.5 3V CIN CL VGEN 0.5V Figure 1. Transient Load Test Circuit VIN 5m A IOUT VOUT 500m V/DIV VOUT 200m V/DIV COUT = 0μF 500μs/DIV COUT = 0μF 250μs/DIV Figure 2....
Page 8 LTC6652 APPLICATIONS INFORMATION 2.8V ≤ VIN ≤ 13.2V C1 R1 VIN 1μF 20k 2V/DIV VIN LTC6652-2.5 SHDN VOUT VOUT VOUT TO μC 6652 F10 1V/DIV Figure 10. Open-Drain Shutdown Circuit COUT = 0μF 100μs/DIV Figur...
Page 9 LTC6652 APPLICATIONS INFORMATION LTC6652-2.5 MS8 PACKAGE 125°C TO 25°C –40°C TO 25°C 3 TYPICAL PARTS TA = 33°C HOURS DISTRIBUTION (ppm) Figure 12. Long Term Drift Figure 13. Hysteresis Plot –40°C to 1...
Page 10 LTC6652 IS IP IO APPLICATIONS INFORMATION 0.7 0.06 TA = 25°C 5m A LOAD NO LOAD TEMPERATURE (°C) VIN (V) Figure 14. Maximum Recommended Dissipation for LTC6652 Figure 15. Typical Power Dissipation of t...
Page 11 LTC6652 PACKAGE DESCRIPTION MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev F) 0.42 ± 0.038 0.65 (.118 ± .004) 0.52 (.0165 ± .0015) (.0256) (NOTE 3) (.0205) TYP BSC REF RECOMMENDED...
Page 12 LTC6652 TYPICAL APPLICATION Improved Reference Supply Rejection in a Data Converter Application LTC1657 DATA D/A VDAC REFGND R1 50k VOUT LTC6652 REF LTC1605 SHDN V1 A/D DOUT C2 COUT 6652 TA05 RELATED ...

Manual Details

Brand Linear
Pages 12
File Size 260.53 KB
Published June 18, 2026
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Frequently Asked Questions

What is the recommended operating temperature range for this reference?

The LTC6652 is fully specified over a wide temperature range from –40°C to 125°C.

Is an external output capacitor required when using the LTC6652?

No, no external load capacitor is required above the output voltage for operation.

What are the low power consumption characteristics in shutdown mode?

The device has a very low shutdown current, measuring less than 2µA.

Which model provides the lowest temperature drift specification?

Model A offers the lowest specified drift rate at 5ppm/°C Max.