Temperature (°C)

-40

-15

10

35

60

85

110 125

78

79

80

81

82

83

84

85

D003

Enable

Blocks

Bandgap

Core

EN

GND

N/C

VIN

VREF

Buffer

Digital

13

REF4132-Q1

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SNAS795A – FEBRUARY 2020 – REVISED JULY 2020

Product Folder Links: REF4132-Q1

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9 Detailed Description

9.1 Overview

The REF4132-Q1 is a low-drift, low-power precision bandgap voltage reference that is specifically designed for

excellent initial voltage accuracy and drift. The Functional Block Diagram is a simplified block diagram of the

REF4132-Q1 showing basic band-gap topology.

9.2 Functional Block Diagram

9.3 Feature Description

9.3.1 Supply Voltage

The REF4132-Q1 voltage reference features an extremely low dropout voltage. For loaded conditions, a typical

dropout voltage versus load is shown on the front page. The REF4132-Q1 features a low quiescent current that

is extremely stable over changes in both temperature and supply. The typical room temperature quiescent

current is 75 μA, and the maximum quiescent current over temperature is just 100 μA. Supply voltages below the

specified levels can cause the REF4132-Q1 to momentarily draw currents greater than the typical quiescent

current. Use a power supply with a fast rising edge and low output impedance to easily prevent this issue.

The supply current vs supply voltage figure is shown in Figure 26.

Figure 26. Supply Current vs Supply Voltage