MAX6683 MAXIM [Maxim Integrated Products], MAX6683 Datasheet - Page 7

• Manufacturer Part Number: MAX6683
• Description: Temperature Sensor and System Monitor in a 10-Pin ?MAX
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 2. Temperature Data Format
(Two's Complement)
ten to the Serial Address Register. This code overwrites
the code set by connection of the ADD pin, until the
MAX6683 is taken through a POR cycle.
The ADC integrates over a 66ms period, an integral
multiple of the line period with excellent noise rejection.
The internal oscillator is trimmed to produce a 66ms
conversion time for temperature and 33ms for each
Table 3. Voltage Data Format
TEMPERATURE
HIGH BYTE
LOW BYTE
128 (1/2 scale)
192 (3/4 scale)
ADC OUTPUT
64 (1/4 scale)
0.875
0.125
+125
(°C)
+25
-25
-40
LSB weight
+1
-1
0
CODE
253
254
255
—
—
—
—
0
1
2
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DIGITAL OUTPUT
0111 1101
0001 1001
0000 0001
0000 0000
1111 1111
1110 0111
1101 1000
1110 0000
0010 0000
(BINARY)
18.75mV to 28.125mV
9.375mV to 18.75mV
9.375mV (1.8V/192)
600mV to 609.4mV
INPUT VOLTAGE
2.372V to 2.381V
2.381V to 2.391V
1.2V to 1.2094V
1.8V to 1.737V
ADC and Multiplexer
< 9.375mV
AT 1.8V
= 2.391V
—
—
—
—
System Monitor in a 10-Pin µMAX
IN
DIGITAL OUTPUT
(HEX)
7D
D8
D0
19
01
00
FF
E7
20
INPUT VOLTAGE
833mV to 846mV
1.667V to 1.680V
3.294V to 3.307V
3.572V to 3.586V
13mV (2.5V/192)
13mV to 26mV
26mV to 39mV
2.5V to 2.513V
AT 2.5V
= 3.586V
< 13mV
Temperature Sensor and
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—
—
voltage. This is equivalent to 4 and 2 cycles of 60Hz,
respectively, and provides protection against noise
pickup from the main supply. The internal oscillator fre-
quency can be changed to provide the same protection
against 50Hz by setting bit 7 in the Configuration
Register to 1 (Table 4). The multiplexer automatically
sequences through the inputs, measuring voltages and
temperature.
Setting bit 0 in the Configuration Register to zero stops
the monitoring loop and puts the MAX6683 into low-
power shutdown mode. In this mode, the SMBus/I
interface remains active, and the supply current drops
to 10µA or less.
The MAX6683 POR supply voltage is typically 2V.
Below this supply voltage, all registers are reset, the
device is put into shutdown mode, and the SMBus/I
interface is inactive.
Two registers, a hot temperature limit (T
a hot temperature hysteresis (T
alarm threshold data (Table 1). If a measured tempera-
ture exceeds the value of T
Alerts are cleared and reasserted depending on
the interrupt mode selected in the Temperature
Configuration Register (see ALERT Interrupts).
IN
INPUT VOLTAGE
1.664V to 1.692V
3.330V to 3.560V
6.566V to 6.640V
6.615V to 6.640V
26mV (5V/192)
26mV to 52mV
52mV to 78mV
5V to 5.026V
= 6.640V
AT 5V
< 26mV
Low-Power Shutdown Mode
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—
—
—
Alarm Threshold Registers
IN
HOT
, an ALERT is asserted.
HYST
Power-On Reset
17.2mV (3.3V/192)
4.348V to 4.366V
4.366V to 4.383V
3.3V to 3.317V
V
HOT
) at 3Ah, store
CC
= 4.383V
= +3.3V
) at 39h and
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2
2
C
C
7