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SAR ADC

VeriSilicon Microelectronics

This analog-to-digital converter uses Successive Approximation Register (SAR) architecture to achieve 12-bit resolution. The IP includes a core internal SAR ADC, 8-1 MUX and touch screen drivers. The internal SAR ADC includes sample/hold circuits, a capacitive DAC, a comparator and logic control circuits.Functional Blocks

External reference or internal reference is needed. In addition, the reference voltage input will be adjusted to allow encoding smaller analog voltage spanning to the full 12 bits of resolution.

The ADC has dual speed modes – 1M or 200K- working in 200K mode could save some power. Moreover, it supports two running modes: free running and single running. In single running mode, SAR will switch to power down mode automatically so as to save power.

The ADC is especially suitable to act as Touch Screen Controller, demanding less off-chip components to complete the design.

Battery voltage detection could be easily accomplished by the SAR ADC. It has in-chip resistor divider and keypad interrupt signal generator.

The converter has flexible control logic, and could be easily embedded in a complex system.

It is also suitable for integrated auxiliary codec applications and multi-converter architectures in wireless or battery-operated products.

  • Process: GLOBALFOUNDRIES 0.13μm logic process 1Poly 8Metal, also supports 1P6M, 1P7M and 1P8M

  • Resolution: 12-bit resolution

  • DNL: +/-1.5 LSB, INL: +/-3 LSB

  • Dual Data Rates: 1MSPS/200KSPS

  • Analog Input Range: VREF to AGND, could be rail-to-rail

  • Analog Supply: 2.97-3.63V; Digital Supply: 1.2V

  • 8 Single-Ended Analog Inputs

  • 4-wire Touch Screen Interface

  • Touch Pressure Measurement

  • Direct Battery Measurement

  • Keypad Interrupt Generator

  • Auto Power Down

  • Low Power Consumption: 4850μW(@1MSPS) / 2170μW(@200KSPS), < 1μA (Auto power down mode)

  • Flexible Control Logic: can be easily embedded in a system, or operates in “stand alone" mode.

  • Size: 373μm*787μm

Summary

Catalog ID

GF13V33_ADC_08C

IP Provider

Vendor

Designer

VeriSilicon Microelectronics

Type

Soft IP

Node

130nm

Vendor

VeriSilicon Microelectronics

Foundry

GlobalFoundries

Process

GF013

Category

A/D Converter

Certifications

icon

Licensing

Info

Contact Designer

Maturity

Stage

product

# of Tries

1

Library Package

Version

1.0

Version Date

Oct 14, 2011