K32L2AX datasheet(66/96 Pages) NXP

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8.6.2 Voltage reference electrical specifications

Table 36. VREF full-range operating requirements

Symbol

Description

Min.

Max.

Unit

Notes

VDDA

Supply voltage for 1.2V output

3.6

—

Supply voltage for 2.1V output

2.4

3.6

—

Temperature

Operating temperature

range of the device

°C

—

Output load capacitance

100

1, 2

1. CL must be connected to VREF_OUT if the VREF_OUT functionality is being used for either an internal or external

reference.

2. The load capacitance should not exceed +/-25% of the nominal specified CL value over the operating temperature range

of the device.

Table 37. VREF full-range operating behaviors

Symbol

Description

Min.

Typ.

Max.

Unit

Notes

Vout

Voltage reference output with factory trim at

nominal VDDA and temperature=25°C

1.190

1.195

1.2

2.092

2.1

2.108

Vout

Voltage reference 1.2 V output— factory trim

1.188

1.195

1.202

Voltage reference 2.1 V output — factory trim

2.087

2.1

2.113

Vstep

Voltage reference trim step for 1.2 V output

—

0.5

—

Voltage reference trim step for 2.1 V output

—

1.5

—

Aging coefficient

—

400

uV/yr

—

Ibg

Bandgap only current

—

µA

Ilp

Low-power buffer current

—

180

360

µA

Ihp

High-power buffer current

—

480

960

µA

ΔVLOAD Load regulation — current is ± 1.0 mA

—

±0.2

—

1, 2

Tstup

Buffer startup time

—

100

µs

—

Vvdrift

Voltage drift for 1.2 V output (Vmax -Vmin

across the full voltage range)

—

0.5

Voltage drift for 2.1 V output (Vmax -Vmin

across the full voltage range)

—

0.9

3.5

Vtdrift

Temperature drift for 1.2 V output (Vmax -Vmin

across the full temperature range)

—

Temperature drift for 2.1 V output (Vmax -Vmin

across the full temperature range)

—

3.5

1. See the chip's Reference Manual for the appropriate settings of the VREF Status and Control register for Vout selection

of 1.2 V or 2.1 V.

2. Load regulation voltage is the difference between the VREF_OUT voltage with no load vs. voltage with defined load

3. To get best performance of VREF temperature drift, VREF_SC[ICOMPEN] must be set.

Peripheral operating requirements and behaviors

K32 L2A Microcontroller with 512 KB Flash and 128 KB SRAM, Rev. 3, 02/2021

NXP Semiconductors

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