1.

General Description



The FS511 is a high-resolution analog-to-digital converter (ADC) chip. The core of this chip is an 18-bit

resolution ADC. Besides the ADC, FS511 consists of switching circuits, operational amplifier, digital filter,

crystal oscillation circuits, digital control logic, and microprocessor interface. Under 5V working voltage, this

chip consumes 1.2mA power.

2.

Features



Delta-Sigma ADC, 18-bit high-resolution 10Hz output rate (Programmable).



Linearity Error: 0.005%FS



Voltage operation ranges from 4.5V to 6V.



4MHz crystal oscillator.



Operation current is less than 1.2mA; sleep mode current is about 1A.



SPI Interface to Micro-Processor



Package: 20-pin DIP, 20-pin SOP.

3.

Applications



Electronics Weigh Scale



Sensor or Transducer measurement application



Others

4.

Ordering Information

Product Number

Description

Package Type

FS511-PI

DIP20 Pb free package part number.

FS511-PHB

SOP20 Pb free package part number.

FS511-GHB

SOP20 “ROHS” package part number.

5.

Pin Configuration

FS511

6

5

7

9

8

10

OPP

OPN

VRH

VRL

SGND

VS

VSSA

4

3

2

FTC

FTB

OPO

1

15

16

14

12

13

11

XTALI

DO/IRQO

XTALO

VDD

VCC

AGND

VSS

17

18

19

SK

CS

DI

20