MAX1272CUA+ Maxim Integrated, MAX1272CUA+ Datasheet - Page 14

• Manufacturer Part Number: MAX1272CUA+
• Description: Analog to Digital Converters - ADC FAULT-PROTECTED 12-BIT ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1272CUA+

• Rohs: yes
• Number Of Channels: 1
• Architecture: SAR
• Conversion Rate: 87 KSPs
• Resolution: 12 bit
• Input Type: Single-Ended
• Snr: Yes
• Interface Type: QSPI, Serial (SPI, Microwire)
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 70 C
• Package / Case: uMAX
• Maximum Power Dissipation: 727 mW
• Minimum Operating Temperature: 0 C
• Number Of Converters: 1
• Voltage Reference: Internal, External

Fault-Protected, 12-Bit ADCs
with Software-Selectable Input Range
When using the SPI (Figure 10a) or MICROWIRE (Figure
10b) interfaces, set CPOL = 0 and CPHA = 0 in the SPI
master. Conversion begins with a falling edge on CS.
Three consecutive 8-bit readings are necessary to
obtain the entire 12-bit result from the ADC. DOUT data
transitions on the serial clock’s falling edge. The first 8-
Figure 9. Immediate Power-Down Timing
14
Figure 8. Delayed Power-Down Timing
DOUT
SCLK
DIN
CS
______________________________________________________________________________________
HI-Z
DOUT
SCLK
DIN
CS
HI-Z
SPI and MICROWIRE Interface
POWERED UP
ACQUISITION
4 SCLKs
ACQUISITION
4 SCLKs
POWERED UP
MSB
CONVERSION
12 SCLKs
POWERED DOWN
bit data stream contains all leading zeros. The second
8-bit data stream contains a leading zero followed by
the MSB through D5. The third 8-bit data stream con-
tains D4–D0 followed by trailing zeros.
LSB
POWERED DOWN
POWERED UP
POWERED UP
HI-Z
HI-Z