AD8803ARZ Analog Devices Inc, AD8803ARZ Datasheet - Page 14

• Manufacturer Part Number: AD8803ARZ
• Description: IC DAC 8BIT OCTAL W/SD 16-SOIC
• Manufacturer: Analog Devices Inc
• Series: TrimDAC®r

Specifications of AD8803ARZ

• Data Interface: Serial
• Settling Time: 600ns
• Number Of Bits: 8
• Number Of Converters: 8
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 27.5mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Resolution (bits): 8bit
• Sampling Rate: 1.7MSPS
• Input Channel Type: Serial
• Supply Voltage Range - Analog: 2.7V To 5.5V
• Supply Current: 1mA
• Digital Ic Case Style: SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

AD8801/AD8803
*
* Enter Contents of SDI1 Data Register
*
*
* Enter Contents of SDI2 Data Register
*
*
*
* Reset AD8801 to one-half scale (AD8803 does not have a Reset input)
*
*
* Get AD8801/03 ready for data input
*
*
TFRLP
*
WAIT
*
*
* Update AD8801 output
*
*
LDAA
PSHY
PSHA
LDAA
STAA
LDAA
STAA
LDX
LDY
BCLR
BSET
BCLR
STAA
LDAA
BPL
INX
CPX
BNE
BSET
PULA
PULY
PULX
RTS
Listing 3. AD8801/AD8803 to MC68HC11 Interface Program Source Code
$0000
SDI1
$0001
SDI2
#SDI1
#$1000
PORTC,Y $02
PORTC,Y $02
PORTD,Y $20
0,X
SPDR
SPSR
WAIT
#SDI2+1
TFRLP
PORTD,Y $20
Hi-byte data loaded from memory
SDI1 = data in location 0000H
Low-byte data loaded from memory
SDI2 = Data in location 0001H
Stack pointer at 1st byte to send via SDI
Stack pointer at on-chip registers
Assert /RS
De-assert /RS
Assert /CS
Get a byte to transfer via SPI
Write SDI data reg to start xfer
Loop to wait for SPIF
SPIF is the MSB of SPSR
Increment counter to next byte for xfer
Are we done yet ?
If not, xfer the second byte
Latch register & update AD8801
When done, restore registers X, Y & A
** Return to Main Program **
(when SPIF is set, SPSR is negated)
–14–
REV. A