CS5501-AS View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS5501-AS

Low-Cost, 16 & 20-Bit Measurement A/D Converter

Cirrus Logic 

CS5501/CS5503

PIN DESCRIPTIONS

SERIAL INTERFACE MODE SELECT MODE 1

CLOCK OUT CLKOUT 2

CLOCK IN CLKIN 3

SYSTEM CALIBRATION 1

SC1 4

DIGITAL GROUND DGND 5

NEGATIVE DIGITAL POWER

VD- 6

NEGATIVE ANALOG POWER

VA- 7

ANALOG GROUND AGND 8

ANALOG IN

AIN 9

VOLTAGE REFERENCE

VREF 10

20 SDATA

19 SCLK

18 DRDY

17 SC2

16 CS

15 VD+

14 VA+

13 CAL

12 BP/UP

11 SLEEP

SERIAL DATA OUTPUT

SERIAL CLOCK INPUT/OUTPUT

DATA READY

SYSTEM CALIBRATION 2

CHIP SELECT

POSITIVE DIGITAL POWER

POSITIVE ANALOG POWER

CALIBRATE

BIPOLAR/UNIPOLAR SELECT

SLEEP

* Pinout applies to both DIP and SOIC packages

Clock Generator

CLKIN; CLKOUT -Clock In; Clock Out, Pins 3 and 2.

A gate inside the CS5501/CS5503 is connected to these pins and can be used with a crystal or

ceramic resonator to provide the master clock for the device. Alternatively, an external (CMOS

compatible) clock can be input to the CLKIN pin as the master clock for the device. When not

in SLEEP mode, a master clock (CLKIN) should be present at all times.

Serial Output I/O

MODE -Serial Interface Mode Select, Pin 1.

Selects the operating mode of the serial port. If tied to VD- (-5V), the CS5501 will operate in

the UART-compatible AC mode for Asynchronous Communication. The SCLK pin will

operate as an input to set the data rate, and data will transmit formatted with one start and two

stop bits. If MODE is tied to DGND, the CS5501/CS5503 will operate in the SEC

(Synchronous External-Clocking) mode, with the SCLK pin operating as an input and the

output appearing MSB-first. If MODE is tied to VD+ (+5V), the CS5501/CS5503 will operate

in its SSC (Synchronous Self-Clocking) mode, with SCLK providing a serial clock output of

CLKIN/4 (25% duty-cycle).

DRDY -Data Ready, Pin 18.

DRDY goes low every 1024 cycles of CLKIN to indicate that new data has been placed in the

output port. DRDY goes high when all the serial port data is clocked out, when the serial port

is being updated with new data, when a calibration is in progress, or when SLEEP is low.

CS -Chip Select, Pin 16.

An input which can be enabled by an external device to gain control over the serial port of the

CS5501/CS5503.

DS31F2

29

Share Link: