MAX1247BCPE+ Maxim Integrated Products, MAX1247BCPE+ Datasheet - Page 15

• Manufacturer Part Number: MAX1247BCPE+
• Description: IC ADC SRL 4CH 12BIT 2.7V 16-DIP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1247BCPE+

• Number Of Bits: 12
• Sampling Rate (per Second): 133k
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 842mW
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Number Of Adc Inputs: 4
• Architecture: SAR
• Conversion Rate: 133 KSPs
• Resolution: 12 bit
• Input Type: Voltage
• Interface Type: 4-Wire (SPI, QSPI, MICROWIRE, TMS320)
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 2.7 V
• Maximum Power Dissipation: 842 mW
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The fastest the MAX1246/MAX1247 can run with CS held
low between conversions is 15 clocks per conversion.
Figure 10a shows the serial-interface timing necessary to
perform a conversion every 15 SCLK cycles in external
clock mode. If CS is tied low and SCLK is continuous,
guarantee a start bit by first clocking in 16 zeros.
Figure 9. Internal Clock Mode SSTRB Detailed Timing
Figure 10a. External Clock Mode, 15 Clocks/Conversion Timing
Figure 10b. External Clock Mode, 16 Clocks/Conversion Timing
DOUT
SCLK
DIN
SSTRB
CS
DOUT
SCLK
SSTRB
DIN
CS
SCLK
DOUT
CS
NOTE: FOR BEST NOISE PERFORMANCE, KEEP SCLK LOW DURING CONVERSION.
S
1
S
1
CONTROL BYTE 0
______________________________________________________________________________________
PD0 CLOCK IN
CONTROL BYTE 0
t
CSH
8
8
t
B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
SSTRB
B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Serial 12-Bit ADCs in QSOP-16
+2.7V, Low-Power, 4-Channel,
CONVERSION RESULT 0
t
CONV
CONVERSION RESULT 0
15
S
1
16
Most microcontrollers (µCs) require that conversions
occur in multiples of 8 SCLK clocks; 16 clocks per con-
version is typically the fastest that a µC can drive the
MAX1246/MAX1247. Figure 10b shows the serial-
interface timing necessary to perform a conversion every
16 SCLK cycles in external clock mode.
CONTROL BYTE 1
S
1
CONTROL BYTE 1
t
SCK
8
B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
8
CONVERSION RESULT 1
t
CSS
15
CONVERSION RESULT 1
B11 B10 B9 B8
S
1
CONTROL BYTE 2
t
DO
16
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15