LPC802 datasheet(25/83 Pages) NXP

25 / 83 page

LPC802

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Product data sheet

Rev. 1.6 — 27 April 2018

25 of 83

NXP Semiconductors

LPC802

32-bit ARM Cortex-M0+ microcontroller

9.20 Analog-to-Digital Converter (ADC)

The ADC supports a resolution of 12 bit and fast conversion rates of up to

480 KSamples/s. Sequences of analog-to-digital conversions can be triggered by multiple

sources. Possible trigger sources are the pin triggers, the analog comparator output, and

the ARM TXEV.

The ADC includes a hardware threshold compare function with zero-crossing detection.

Remark: For best performance, select VREFP and VREFN at the same voltage levels as

VDD and VSS. When selecting VREFP and VREFN different from VDD and VSS, ensure

that the voltage midpoints are the same:

(VREFP-VREFN)/2 + VREFN = VDD/2

9.20.1 Features

• 12-bit successive approximation analog to digital converter.

• 12-bit conversion rate of up to 480 KSamples/s.

• Two configurable conversion sequences with independent triggers.

• Optional automatic high/low threshold comparison and zero-crossing detection.

• Power-down mode and low-power operating mode.

• Measurement range VREFN to VREFP (not to exceed VDD voltage level).

• Burst conversion mode for single or multiple inputs.

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