AD7247ABR Analog Devices Inc, AD7247ABR Datasheet - Page 12

• Manufacturer Part Number: AD7247ABR
• Description: IC DAC 12BIT LC2MOS DUAL 24SOIC
• Manufacturer: Analog Devices Inc
• Series: DACPORT®r

Specifications of AD7247ABR

• Data Interface: Parallel
• Settling Time: 10µs
• Mounting Type: Surface Mount
• Rohs Status: RoHS non-compliant
• Number Of Bits: 12
• Number Of Converters: 2
• Voltage Supply Source: Dual ±
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-SOIC (7.5mm Width)
• Resolution (bits): 12bit
• No. Of Pins: 24
• Operating Temperature Range: -40°C To +85°C
• Update Rate: 0.125MSPS
• Termination Type: SMD
• Power Dissipation (max): -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD7237A/AD7247A
Either high byte or low byte data can be written first to the in-
OUTLINE DIMENSIONS
put latch. A write to the AD7237A DAC Latch address transfers
Dimensions shown in inchcs and (mm).
the data from the input latches to the respective DAC latches
and updates both analog outputs. Alternatively, the LDAC in-
Plastic DIP (N-24)
put can be asynchronous or can be common to a number of
AD7237As for simultaneous updating of a number of voltage
channels.
AD7237A—68008 Interface
An interface between the AD7237A and the 68008 is shown in
Figure 14. In the diagram shown, the LDAC is derived from an
asynchronous LDAC signal, but this can be derived from the
address decoder as in the previous interface diagram.
Cerdip (Q-24)
Figure 14. AD7237A to 68008 Interface
AD7237A—6502/6809 Interface
Figure 15 shows an interface between the AD7237A and the
6502 or 6809 microprocessor. The procedure for writing data to
SOIC (R-24)
the AD7237A is as outlined for the 8085A/8088 interface. For
the 6502 microprocessor, the 2 clock is used to generate the
WR, while for the 6809 the E signal is used.
Figure 15. AD7237A to 6502/6809 Interface
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