DA6021 datasheet(139/225 Pages) RENESAS

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DA6021

HIGHLY INTEGRATED POWER MANAGEMENT IC FOR

INTEL® ATOM™ Z3000 PROCESSOR

Company Confidential

Data Sheet

Version 3.A - Final

31-Jan-14

139 of 224

www.dialog-semiconductor.com

15. Analog

–to–Digital Converter

A general purpose analog-to-digital converter (GPADC) provides measurements of various voltages, currents

and temperatures within the device. There is one 10-bit ADC which is time-division multiplexed to perform the

measurements of the various parameters. The GPADC contains the 10-bit ADC, the analog input channel

multiplexer and some additional analog functions.

The digital ADC block automates the measurement process by overlaying a sequencer function. It performs

some automatic measurements at predefined sequence points, if enabled. Besides that, the host can initiate

manual measurements at certain points in the sequence. The ADC replaces some on-chip comparator used for

internal purpose so in addition to the automatic measures initiated by the host, internal measure sequences are

processed, too.

The automatic measurements can raise interrupts if the measurement is outside of configurable thresholds.

The digital block controls the analog-to-digital (AD) conversion process. This allows testing the conversion logic

via scan tests.

When powering down the device the digital ADC block may stop the measurements and disable the GPADC in

order to reduce the power consumption. This feature is controlled by the Power Supply Sequencer (PSS) and

some registers.

Electrical Characteristics

15.1

PARAMETER

SYMBOL

TEST CONDITIONS

Min

Typ

Max

UNIT

Val

ADC Resolution

bit

D,E

Absolute Accuracy

Integral Non-Linearity

INL

+/- 2

LSB

Differential Non-

Linearity

DNL

+/- 0.8

LSB

ADC Supply Voltage

2.5

ADC Reference

Voltage

VADC_R

VDD_CORE

2.5

ADC Operating

Current

during conversion

100

µA

Power Down Current

µA

ADC Clock

MHz

Auto-Zero Time

Total Sampling Time

including the Auto-

Zero time

Conversion Time

Total ADC Conversion

Time

Maximum Source

Impedance

RS is the impedance

of the external

source sampled by

the ADC

120

kΩ

Internal Mux

Resistance

RINT

kΩ

Internal Sampling

Capacitor

Total Input

Capacitance

CINT

parasitic and pad

capacitance included

Acquisition Time

~7τ = 7 x (RS +

RINT) x CINT

VSYS Voltage Range

/ channel A0 /

ADC=[(VSYS-2.5) x

0.5] x 1023

2.5

5.5

DA6021 Datasheet(PDF) 139 Page - Renesas Technology Corp

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