AD7478 Analog Devices, AD7478 Datasheet - Page 20

• Manufacturer Part Number: AD7478
• Description: 8-Bit, 1 MSPS, Low Power Successive Approximation ADC Which Operates From A Single 2.35 V to 5.25 V Power Supply
• Manufacturer: Analog Devices

Specifications of AD7478

• Resolution (bits): 8bit
• # Chan: 1
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOT

AD7476/AD7477/AD7478
AD7476/AD7477/AD7478 to MC68HC16 Interface
The serial peripheral interface (SPI) on the MC68HC16 is
configured for master mode (MSTR = 1), the clock polarity bit
(CPOL) = 1, and the clock phase bit (CPHA) = 0. The SPI is
configured by writing to the SPI Control Register (SPCR). For
more information on the MC68HC16, check with Motorola for
the related documentation.
AD7478
AD7476/
AD7477/
1
ADDITIONAL PINS OMITTED FOR CLARITY
Figure 28. Interfacing to the DSP56xxx
SDATA
SCLK
CS
1
SCK
SRD
SC2
DSP56xxx
1
Rev. F | Page 20 of 24
The serial transfer takes place as a 16-bit operation when the
SIZE bit in the SPCR register is set to SIZE = 1. To implement
the power-down mode with an 8-bit transfer, set SIZE = 0.
A connection diagram is shown in Figure 29.
AD7478
AD7476/
AD7477/
1
ADDITIONAL PINS OMITTED FOR CLARITY
Figure 29. Interfacing to the MC68HC16
SDATA
SCLK
CS
1
SCLK/PMC2
MISO/PMC0
SS/PMC9
MC68HC16
1