EMC1043-4-ACZL SMSC, EMC1043-4-ACZL Datasheet - Page 12

• Manufacturer Part Number: EMC1043-4-ACZL
• Description: Board Mount Temperature Sensors Temp Snsr
• Manufacturer: SMSC

Specifications of EMC1043-4-ACZL

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

Revision 1.44 (04-14-08)
3.3
3.3.1
3.3.2
1 / sec
2 / sec
4 / sec
8 / sec
16 / sec
CONVERSION RATE
When the device is active, there are two modes of operation available.
Conversion Rates
The EMC1043 may be configured for different conversion rates based on the system requirements.
The available rates are 1 full set of conversions per second to 16 full sets of conversions per second.
The conversion rate is configured as described in
shown in
Dynamic Averaging
The EMC1043 temperature channels support a new feature that measures the external diode channels
for an extended time based on the selected conversion rate. This functionality can be disabled as
described in
Averaging is enabled, the device will automatically adjust the sampling and measurement time for both
external diode channels. This allows the device to average 2x or 4x longer than the normal 11 bit
operation 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 on the
temperature measurement.
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.
The Dynamic Averaging will affect the average supply current based on the chosen conversion rate
as shown in
Operation During Run Mode
Normal Mode (power-up default) - In this mode of operation, the EMC1043 continuously samples
and updates all of its temperature channels.
Hotter of Two Mode - In this mode, the EMC1043 continuously samples and then compares the
two remote zones. The hotter of the two remote zones is loaded into the External Diode 2 Data
Registers. In addition, the HOTTER bit in the Status register is set or cleared to indicate which
external diode zone is hotter. If the two remote zones are exactly equal to each other, then the
HOTTER bit is cleared (set to ‘0’), and the results of the two remote zones are stored in their
respective registers.
Table 3.1 Supply Current vs. Conversion Rate and ADC Averaging Factor
Table
Table
Section 4.5
190uA
315uA
580uA
N/A
N/A
4.4.
3.1.
(MAX_RES = 1)
(DA_N = 0)
for increased power savings at the lower conversion rates. When Dynamic
4X
1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones
DATASHEET
12
ADC AVERAGING FACTOR
132uA
205uA
350uA
640uA
N/A
(MAX_RES = 0)
Section
(DA_N = 0)
2X
4.4. The available conversion rates are
105uA
150uA
235uA
405uA
750uA
(DA_N = 1)
SMSC EMC1043
1X
Datasheet