Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- ELECTRICAL CHARACTERISTICS: AVDD = 5V
- ELECTRICAL CHARACTERISTICS: AVDD = 3V
- DIGITAL CHARACTERISTICS: TMIN to TMAX, DVDD = 2.7V to 5.25V
- FLASH CHARACTERISTICS: TMIN to TMAX, DVDD = 2.7V to 5.25V, unless otherwise specified.
- PIN CONFIGURATION
- TIMING SPECIFICATIONS
- TIMING SPECIFICATION TABLE
- TIMING SPECIFICATION TABLE
- TYPICAL CHARACTERISTICS
- OVERVIEW
- INPUT MULTIPLEXER
- TEMPERATURE SENSOR
- BURNOUT CURRENT SOURCES
- INPUT BUFFER
- IDAC1 AND IDAC2
- PGA
- PGA OFFSET DAC
- MODULATOR
- VOLTAGE REFERENCE INPUT
- ON-CHIP VOLTAGE REFERENCE
- VRCAP PIN
- CLOCK GENERATOR
- CALIBRATION
- DIGITAL FILTER
- DIGITAL I/O INTERFACE
- SERIAL PERIPHERAL INTERFACE
- DATA READY
- DSYNC OPERATION
- MEMORY
- REGISTER BANK
- RAM
- FLASH
- REGISTER MAP
- COMMAND DEFINITIONS
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SCLK Reset Waveform
t
12
t
14
t
15
t
13
t
13
SCLK
t
17
DRDY
t
16
RESET, DSYNC, PDWN
ADS1218
Resets On Falling Edge
TIMING SPECIFICATION TABLE
ADS1218
SBAS187C – SEPTEMBER 2001 – REVISED SEPTEMBER 2005
SPEC DESCRIPTION MIN MAX UNIT
t
12
SCLK Reset, First High Pulse 300 500 t
OSC
Periods
t
13
SCLK Reset, Low Pulse 5 t
OSC
Periods
t
14
SCLK Reset, Second High Pulse 550 750 t
OSC
Periods
t
15
SCLK Reset, Third High Pulse 1050 1250 t
OSC
Periods
t
16
Pulse Width 4 t
OSC
Periods
t
17
Data Not Valid During this Update Period 4 t
OSC
Periods
10