EMC1074-1-AIZL-TR SMSC, EMC1074-1-AIZL-TR Datasheet - Page 17

• Manufacturer Part Number: EMC1074-1-AIZL-TR
• Description: Board Mount Temperature Sensors SMBus Temp Sensor Selectable Address
• Manufacturer: SMSC

Specifications of EMC1074-1-AIZL-TR

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Multiple Channel 1°C Temperature Sensors with Selectable Address
Datasheet
SMSC EMC1073 / EMC1074
5.1
5.1.1
5.1.2
CONVERSION RATE
4 / sec (default)
1 / 16 sec
1 / 8 sec
1 / 4 sec
1 / 2 sec
16 / sec
1 / sec
2 / sec
8 / sec
The EMC1073 and EMC1074 have two modes of operation.
Conversion Rates
The EMC1073 and EMC1074 may be configured for different conversion rates based on the system
requirements. The conversion rate is configured as described in
Register". The default conversion rate is 4 conversions per second. Other available conversion rates
are shown in
Dynamic Averaging
Dynamic averaging causes the EMC1073 and EMC1074 to measure the external diode channels for
an extended time based on the selected conversion rate. This functionality can be disabled for
increased power savings at the lower conversion rates (see
When dynamic averaging is enabled, the device will automatically adjust the sampling and
measurement time for the external diode channels. This allows the device to average 2x or 16x longer
than the normal 11 bit operation (nominally 21ms per channel) while still maintaining the selected
conversion rate. The benefits of dynamic averaging are improved noise rejection due to the longer
integration time as well as less random variation of the temperature measurement.
When enabled, the dynamic averaging applies when a one-shot command is issued. The device will
perform the desired averaging during the one-shot operation according to the selected conversion rate.
When enabled, the dynamic averaging will affect the average supply current based on the chosen
conversion rate as shown in
Modes of Operation
Active (Run) - In this mode of operation, the ADC is converting on all temperature channels at the
programmed conversion rate. The temperature data is updated at the end of every conversion and
the limits are checked. In Active mode, writing to the one-shot register will do nothing.
Standby (Stop) - In this mode of operation, the majority of circuitry is powered down to reduce
supply current. The temperature data is not updated and the limits are not checked. In this mode
of operation, the SMBus is fully active and the part will return requested data. Writing to the one-
shot register will enable the device to update all temperature channels. Once all the channels are
updated, the device will return to the Standby mode.
Table 5.1 Supply Current vs. Conversion Rate for EMC1073
Table 6.6, "Conversion
(DEFAULT)
ENABLED
AVERAGE SUPPLY CURRENT
1010uA
1020uA
660uA
660uA
660uA
660uA
660uA
930uA
950uA
Table 5.1
DATASHEET
Rate".
for EMC1073.
17
DISABLED
430uA
430uA
430uA
430uA
430uA
475uA
510uA
630uA
775uA
Section 6.4, "Configuration
AVERAGING FACTOR (BASED ON
(DEFAULT)
ENABLED
16x
16x
16x
16x
16x
Section 6.5, "Conversion Rate
8x
4x
2x
1x
11-BIT OPERATION)
Revision 1.39 (10-11-10)
DISABLED
1x
1x
1x
1x
1x
1x
1x
1x
1x
Register").