LTC1605-2CG#PBF Linear Technology, LTC1605-2CG#PBF Datasheet - Page 17

• Manufacturer Part Number: LTC1605-2CG#PBF
• Description: IC A/D CONV 16BIT SAMPLNG 28SSOP
• Manufacturer: Linear Technology

Specifications of LTC1605-2CG#PBF

• Number Of Bits: 16
• Sampling Rate (per Second): 100k
• Data Interface: Parallel
• Number Of Converters: 1
• Power Dissipation (max): 80mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP (0.200", 5.30mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

* Retrieve the MUX address from memory
* and send it to the LTC1391
*****************************************
*
WAIT1
*
*
*
*
*
*****************************************
* Initiate a LTC1605 conversion
*****************************************
*
*
*
*****************************************
* Set the LTC1605’s BYTE input low to
* ensure that the high byte is present
* during the first read
*****************************************
*
*
*****************************************
* The next short loop ensures that the
* LTC1605’s conversion is finished *
* before starting the data transfer*
*****************************************
*
CONVENDLDAA
*
*
*
*
*
TYPICAL APPLICATIO S
LDAA
ORAA
STAA
LDAA
BPL
BCLR
BCLR
BSET
LDAA
ANDA
STAA
ANDA
BEQ
MUX
#$08
SPDR
SPSR
WAIT1
PORTD,Y %00100000
PORTA,Y %00010000
PORTA,Y %00010000
PORTA
#%11110111
PORTA
PORTA
#%00000001
CONVEND
Retrieve the MUX address from memory
Enable the selected MUX address
Select the MUX channel
This loop waits for the SPI to complete a serial
transfer/exchange by reading the SPI Status Register
The SPIF (SPI transfer complete flag) bit is the SPSR’s
MSB and is set to one at the end of an SPI transfer. The
branch will occur while SPIF is a zero.
Get the contents of Port A
Set Bit3 low
Set the LTC1605’s BYTE input low
Retrieve the contents of port A
Look at Bit0
Bit0 = Lo; the LTC1605’s conversion is not
complete
Bit0 = Hi; the LTC1605’s conversion is complete
Branch to the loop’s beginning while Bit7
remains low
U
*
This forces a logic low on PORTD’s SS*,
latching the MUXes data
Initiate a conversion
This sets the LTC1605’s R/C* to a logic
high
*
*
*
*
*
*
LTC1605-1/LTC1605-2
17