AD5322BRMZ Analog Devices Inc, AD5322BRMZ Datasheet - Page 17

• Manufacturer Part Number: AD5322BRMZ
• Description: IC DAC 12BIT DUAL 10MSOP
• Manufacturer: Analog Devices Inc

Specifications of AD5322BRMZ

• Data Interface: Serial
• Settling Time: 6µs
• Number Of Bits: 12
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 2.5mW
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Resolution (bits): 12bit
• Sampling Rate: 125kSPS
• Input Channel Type: Serial
• Supply Voltage Range - Analog: 2.5V To 5.5V
• Supply Current: 300µA
• Digital Ic Case Style: SOP
• Package: 10MSOP
• Resolution: 12 Bit
• Conversion Rate: 125 KSPS
• Architecture: Resistor-String
• Digital Interface Type: Serial (3-Wire, SPI, QSPI, Microwire)
• Number Of Outputs Per Chip: 2
• Output Type: Voltage
• Full Scale Error: ±1 %FSR
• Integral Nonlinearity Error: ±8 LSB
• Maximum Settling Time: 10 us
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MICROPROCESSOR INTERFACING
AD5302/AD5312/AD5322 TO ADSP-2101/ADSP-
2103 INTERFACE
Figure 34 shows a serial interface between the AD5302/AD5312/
AD5322 and the ADSP-2101/ADSP-2103. The
2103
framing mode. The
through the SPORT control register and should be configured
as follows: internal clock operation, active low framing, 16-bit
word length. Transmission is initiated by writing a word to the
Tx register after the SPORT has been enabled. The data is clocked
out on each falling edge of the DSP’s serial clock and clocked into
the AD5302/AD5312/AD5322 on the rising edge of the DSP’s serial
clock. This corresponds to the falling edge of the DAC’s SCLK.
AD5302/AD5312/AD5322 TO 68HC11/68L11
INTERFACE
Figure 35 shows a serial interface between the AD5302/AD5312/
AD5322 and the 68HC11/68L11 microcontroller. SCK of the
68HC11/68L11 drives the SCLK of the AD5302/AD5312/AD5322,
while the MOSI output drives the serial data line of the DAC.
The SYNC signal is derived from a port line (PC7). The setup
conditions for correct operation of this interface are as follows:
the 68HC11/68L11 should be configured so that its CPOL bit = 0
and its CPHA bit = 1. When data is being transmitted to the
DAC, the SYNC line is taken low (PC7). When the 68HC11/
68L11 are configured as above, data appearing on the MOSI
output is valid on the falling edge of SCK. 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
AD5302/AD5312/AD5322, PC7 is left low after the first eight
bits are transferred and a second serial write operation is
performed to the DAC; PC7 is taken high at the end of this
procedure.
Figure 34. AD5302/AD5312/AD5322 to ADSP-2101/ADSP-2103 Interface
should be set up to operate in the SPORT transmit alternate
Figure 35. AD5302/AD5312/AD5322 to 68HC11/68L11 Interface
68HC11/68L11
ADSP-2101/
ADSP-2103
1
1
ADDITIONAL PINS OMITTED FOR CLARITY
ADDITIONAL PINS OMITTED FOR CLARITY
SCLK
ADSP-2101/ADSP-2103
MOSI
SCK
TFS
PC7
1
DT
1
SYNC
DIN
SCLK
SYNC
SCLK
DIN
AD5322
AD5302/
AD5312/
AD5302/
AD5312/
AD5322
sport is programmed
ADSP-2101/ADSP-
1
1
Rev. C | Page 17 of 24
AD5302/AD5312/AD5322 TO 80C51/80L51
INTERFACE
Figure 36 shows a serial interface between the AD5302/AD5312/
AD5322 and the 80C51/80L51 microcontroller. The setup for
the interface is as follows: TXD of the 80C51/80L51 drives
SCLK of the AD5302/AD5312/AD5322, 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 AD5302/
AD5312/AD5322, P3.3 is taken low. The 80C51/80L51 transmit
data in 8-bit bytes only; 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
AD5302/AD5312/AD5322 require their data with the MSB as
the first bit received. The 80C51/80L51 transmit routine should
take this into account.
AD5302/AD5312/AD5322 TO MICROWIRE
INTERFACE
Figure 37 shows an interface between the AD5302/AD5312/
AD5322 and any MICROWIRE-compatible device. Serial data is
shifted out on the falling edge of the serial clock and is clocked
into the AD5302/AD5312/AD5322 on the rising edge of the SK.
Figure 36. AD5302/AD5312/AD5322 to 80C51/80L51 Interface
Figure 37. AD5302/AD5312/AD5322 to MICROWIRE Interface
80C51/80L51
MICROWIRE
1
1
ADDITIONAL PINS OMITTED FOR CLARITY
ADDITIONAL PINS OMITTED FOR CLARITY
P3.3
RXD
TXD
SO
CS
SK
1
1
AD5302/AD5312/AD5322
SYNC
SCLK
DIN
SYNC
SCLK
DIN
AD5302/
AD5312/
AD5322
AD5302/
AD5312/
AD5322
1
1