AD5320BRM Analog Devices Inc, AD5320BRM Datasheet - Page 14

• Manufacturer Part Number: AD5320BRM
• Description: D/A Converter (D-A) IC
• Manufacturer: Analog Devices Inc

Specifications of AD5320BRM

• Resolution (bits): 12bit
• Digital Ic Case Style: MSOP
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +105°C
• Update Rate: 0.125MSPS
• Mounting Type: Surface Mount
• Peak Reflow Compatible (260 C): No
• Rohs Status: RoHS non-compliant
• Settling Time: 8µs
• Number Of Bits: 12
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power Dissipation (max): -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD5320
MICROPROCESSOR INTERFACING
AD5320 TO ADSP-2101/ADSP-2103 INTERFACE
Figure 28 shows a serial interface between the AD5320 and the
ADSP-2101/ADSP-2103. The ADSP-2101/ADSP-2103 should
be set up to operate in the serial port (SPORT) transmit alter-
nate framing mode. The ADSP-2101/ADSP-2103 SPORT are
programmed through the SPORT control register and should
be configured as follows: internal clock operation, active low
framing, and 16-bit word length. Transmission is initiated by
writing a word to the Tx register after the SPORT has been
enabled.
AD5320 TO 68HC11/68L11 INTERFACE
Figure 29 shows a serial interface between the AD5320 and the
68HC11/68L11 microcontroller. SCK of the 68HC11/68L11
drives the SCLK of the AD5320, while the MOSI output drives
the serial data line of the DAC. The SYNC signal is derived
from a port line (PC7). For correct operation of this interface,
the 68HC11/68L11 should be configured so that the CPOL bit
is a 0 and the CPHA bit is a 1. When data is being transmitted
to the DAC, the SYNC line is taken low (PC7). When the
68HC11/68L11 are configured, data appearing on the MOSI
output is valid on the falling edge of SCK as shown in Figure 29.
Serial data from the 68HC11/68L11 is transmitted in 8-bit bytes
with only eight falling clock edges occurring in the transmit
cycle. Data is transmitted MSB first. In order to load data to the
AD5320, PC7 is left low after the first eight bits are transferred,
and a second serial write operation is performed to the DAC
and PC7 is taken high at the end of this procedure.
Figure 28. AD5320 to ADSP-2101/ADSP-2103 Interface
68HC11/68L11*
ADSP-2101/
ADSP-2103*
Figure 29. AD5320 to 68HC11/68L11 Interface
*ADDITIONAL PINS OMITTED FOR CLARITY
*ADDITIONAL PINS OMITTED FOR CLARITY
SCLK
MOSI
SCK
PC7
TFS
DT
SYNC
DIN
SCLK
SYNC
SCLK
DIN
AD5320*
AD5320*
Rev. C | Page 14 of 20
AD5320 TO 80C51/80L51 INTERFACE
Figure 30 shows a serial interface between the AD5320 and the
80C51/80L51 microcontrollers. TXD of the 80C51/80L51 drives
SCLK of the AD5320, while RXD drives the serial data line of
the part. The SYNC signal is again derived from a bit
programmable pin on the port. In this case, port line P3.3 is
used. When data is to be transmitted to the AD5320, P3.3 is
taken low. The 80C51/80L51 transmits data only in 8-bit bytes;
thus only eight falling clock edges occur in the transmit cycle.
To load data to the DAC, P3.3 is left low after the first eight bits
are transmitted, and a second write cycle is initiated to transmit
the second byte of data. P3.3 is taken high following the
completion of this cycle. The 80C51/ 80L51 output the serial
data in a format that has the LSB first. The AD5320 requires its
data with the MSB as the first bit received. The 80C51/80L51
transmit routine should consider this.
AD5320 TO MICROWIRE INTERFACE
Figure 31 shows an interface between the AD5320 and any
MICROWIRE-compatible device. Serial data is shifted out on
the falling edge of the serial clock and is clocked into the
AD5320 on the rising edge of the SK.
80C51/80L51*
MICROWIRE*
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 30. AD5320 to 80C51/80L51 Interface
Figure 31. AD5320 to MICROWIRE Interface
*ADDITIONAL PINS OMITTED FOR CLARITY
P3.3
RXD
TXD
CS
SK
SO
SYNC
SCLK
DIN
SYNC
SCLK
DIN
AD5320*
AD5320*