MAX1246BEPE Maxim Integrated, MAX1246BEPE Datasheet - Page 15
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MAX1246BEPE
Manufacturer Part Number
MAX1246BEPE
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet
1.MAX1247BEEE-T.pdf
(25 pages)
Specifications of MAX1246BEPE
Number Of Channels
4/2
Architecture
SAR
Conversion Rate
133 KSPs
Resolution
12 bit
Input Type
Single-Ended/Differential
Snr
70 dB
Interface Type
4-Wire (SPI, Microwire, QSPI, TMS320)
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Package / Case
PDIP N
Maximum Power Dissipation
667 mW
Minimum Operating Temperature
- 40 C
Number Of Converters
1
Voltage Reference
2.5 V
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
• • •
• • •
• • •
• • •
15