LTC2435-1IGN datasheet(21/40 Pages) LINER

21 / 40 page

LTC2435/LTC2435-1

24351fa

When testing EOC, if the conversion is complete (EOC = 0),

the device will exit the sleep state and enter the data output

state. In order to allow the device to return to the sleep

state, CS must be pulled HIGH before the first rising edge

of SCK. In the internal SCK timing mode, SCK goes HIGH

and the device begins outputting data at time tEOCtest after

the falling edge of CS (if EOC = 0) or tEOCtest after EOC goes

LOW (if CS is LOW during the falling edge of EOC). The

value of tEOCtest is 23µs (LTC2435), 26µs (LTC2435-1) if

the device is using its internal oscillator (F0 = logic LOW or

APPLICATIO S I FOR ATIO

Figure 10. External Serial Clock, CS = 0 Operation (2-Wire)

Figure 11. Internal Serial Clock, Single Cycle Operation

EOC

BIT 23

SDO

SCK

(EXTERNAL)

MSB

LSB

SIG

BIT 0

BIT 5

BIT 19

BIT 18

BIT 20

BIT 21

BIT 22

DATA OUTPUT

CONVERSION

2435 F10

CONVERSION

VCC

REF+

REF–

SCK

IN+

IN–

SDO

GND

214

1, 7, 8, 9, 10, 15, 16

REFERENCE

VOLTAGE

0.1V TO VCC

ANALOG INPUT RANGE

–0.5VREF TO 0.5VREF

2-WIRE

INTERFACE

1µF

2.7V TO 5.5V

LTC2435/

LTC2435-1

= 50Hz REJECTION (LTC2435)

= EXTERNAL OSCILLATOR

= 60Hz REJECTION (LTC2435)

= 50Hz/60Hz REJECTION (LTC2435-1)

VCC

SDO

SCK

(INTERNAL)

MSB

LSB

SIG

BIT 0

BIT 5

TEST EOC

BIT 19

BIT 18

BIT 20

BIT 21

BIT 22

EOC

BIT 23

SLEEP

DATA OUTPUT

CONVERSION

2435 F11

<tEOCtest

VCC

10k

Hi-Z

TEST EOC

VCC

REF+

REF–

SCK

IN+

IN–

SDO

GND

214

1, 7, 8, 9, 10, 15, 16

REFERENCE

VOLTAGE

0.1V TO VCC

ANALOG INPUT RANGE

–0.5VREF TO 0.5VREF

3-WIRE

SPI INTERFACE

1µF

2.7V TO 5.5V

LTC2435/

LTC2435-1

= 50Hz REJECTION (LTC2435)

= EXTERNAL OSCILLATOR

= 60Hz REJECTION (LTC2435)

= 50Hz/60Hz REJECTION (LTC2435-1)

VCC

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