MAX1253 Datasheet, PDF (9/29 Pages) Maxim Integrated Products – Stand-Alone, 10-Channel, 12-Bit System Monitors with Internal Temperature Sensor and VDD Monitor

Stand-Alone, 10-Channel, 12-Bit System Monitors
with Internal Temperature Sensor and V_DD Monitor
Block Diagram
VDD
REFERENCE
TEMP
SENSOR
AIN1
AIN2
AIN3
MUX
AIN4
AIN5
AIN6
AIN7
INTERNAL TEMP
VDD/2
12-BIT
ADC WITH
T/H
SCAN
AND
CONVERSION
CONTROL
POR
POWER-
GOOD
AIN0
AIN1
AIN2
INPUT CHANNEL REGISTER
INPUT CONFIGURATION REGISTER
STEP-UP REGISTER
ALARM REGISTER
AVERAGING
AIN3
AIN4
AIN5
MAX1253
MAX1254
SERIAL
INTERFACE
DIGITAL
COMPARATOR
AIN6
AIN7
ACCUMULATOR ACCUMULATOR ACCUMULATOR ACCUMULATOR ACCUMULATOR ACCUMULATOR ACCUMULATOR ACCUMULATOR ACCUMULATOR ACCUMULATOR
UPPER
THRESHOLD
UPPER
THRESHOLD
UPPER
THRESHOLD
UPPER
THRESHOLD
UPPER
THRESHOLD
UPPER
THRESHOLD
UPPER
THRESHOLD
UPPER
THRESHOLD
UPPER
THRESHOLD
UPPER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
LOWER
THRESHOLD
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION
REF
DOUT
DIN
SCLK
CS
INT
Pin Description
PIN NAME
FUNCTION
1 AIN0 Analog Voltage Input/Temperature Input Channel 0 or Positive Differential Input Relative to AIN1
2 AIN1 Analog Voltage Input/Temperature Input Channel 1 or Negative Differential Input Relative to AIN0
3 AIN2 Analog Voltage Input/Temperature Input Channel 2 or Positive Differential Input Relative to AIN3
4 AIN3 Analog Voltage Input/Temperature Input Channel 3 or Negative Differential Input Relative to AIN2
5 AIN4 Analog Voltage Input/Temperature Input Channel 4 or Positive Differential Input Relative to AIN5
6 AIN5 Analog Voltage Input/Temperature Input Channel 5 or Negative Differential Input Relative to AIN4
7 AIN6 Analog Voltage Input/Temperature Input Channel 6 or Positive Differential Input Relative to AIN7
8 AIN7 Analog Voltage Input/Temperature Input Channel 7 or Negative Differential Input Relative to AIN6
9
REF
Positive Reference Input in External Mode. Bypass REF with a 0.1µF capacitor to GND when in external mode.
When using the internal reference, REF must be left open.
10 INT Interrupt Output. Push-pull or open drain with selectable polarity. See Table 9 and the INT Interrupt Output section.
11 DOUT Serial Data Output. DOUT transitions on the falling edge of SCLK. High impedance when CS is at logic high.
12 GND Ground
13 V_DD Positive Power Supply. Bypass with a 0.1µF capacitor to GND.
14 DIN Serial Data Input. DIN data is latched into the serial interface on the rising edge of the SCLK.
15 SCLK Serial Clock Input. Clocks data in and out of the serial interface (duty cycle must be 40% to 60%).
16
CS ^{Active-Low Chip-Select Input. When CS is low, the serial interface is enabled. When CS is high, DOUT is high}
impedance, and the serial interface resets.
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