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71M6113-IF Datasheet(PDF) 5 Page - Maxim Integrated Products

Part No. 71M6113-IF
Description  On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

71M6113-IF Datasheet(HTML) 5 Page - Maxim Integrated Products

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PDS_6xxx_010
71M6xxx Data Sheet
v1.2
© 2008–2011 Teridian Semiconductor Corporation
5
The 71M6xxx isolated sensors provide a continuous data stream of ADC data plus an independent data
stream that contains auxiliary information as requested by the 71M654x. The ADC data is processed by
CE code in the 71M654x and stored in CE RAM. Auxiliary information is processed by the MPU of the
71M654x using I/O RAM registers.
Basic settings and functions of the 71M6xxx can be controlled by various I/O RAM registers in the
71M654x. The command sent towards the 71M6xxx is placed in the RCMD[4:2] register of the 71M654x,
with further specification contained in the TMUXRn[2:0] register. Refer to the 71M654x data sheets for
details.
Table 1 shows the allowable combinations of values in RCMD[4:2] and TMUXRn[2:0] , and the achieved
operation along with the type and format of data sent back by the 71M6xxx isolated sensors.
Table 1: Remote Interface Commands
RCMD[4:2]
TMUXRn[2:0]
Read
Operation/Command
R6K_RD [15:0]
001
00X
Chip-characteristic
temperature data
TRIMT (see note), use bits [8:1]
001
01X
TRIMBGC (see note), use bits [15:6]
001
10X
TRIMBGA (see note), use bits [15:8]
001
11X
TRIMBGB bits [15:8], TRIMBGD bits [7:0]
(see note)
010
00X
Temperature
Output of the temperature sensor, bits [10:0]
010
01X
Supply voltage
Supply voltage measurement , bits [7:0]
010
10X
Chip version
Chip version code, use bits [15:8]
110
111
Reset
Note: TRIMBGA to TRIMBGD and TRIMT are values used for characterizing the individual 71M6xxx over temperature. Availability
of TRIMBGA to TRIMBGD and TRIMT depends on the part number (see Table 10 for details)
.
The remote interface commands listed in Table 1 enable the 71M654x to gather the following information
from the 71M6xxx:
Output of the temperature sensor
Information on how the device is characterized over temperature
Supply voltage
Chip version code
The control commands listed in Table 1 enable the 71M654x to initiate the following actions in the
71M6xxx:
Read the 71M6xxx temperature sensor
Read the 71M6xxx VCC sensor
Hardware reset
With hardware and temperature characterization information on each connected 71M6xxx isolated sensor
available to the 71M654x host MPU, temperature compensation of the energy measurement can be
implemented based on the individual temperature characteristics of the 71M6xxx isolated sensors. For
example, when the 71M6xxx are used in a polyphase meter containing three shunt resistors, the
temperature increase in each 71M6xxx can be monitored and used to compensate for the temperature
coefficient of the 71M6xxx VREF and the corresponding shunt resistor.
3
APPLICATIONS INFORMATION
3.1
Product Selection
A low-noise differential-input preamplifier applies gain to the signal from the current sensor to the optimal
input range of the ADC. The current sensor is connected to the inputs of the preamplifier through INP and
INN. The output of the preamplifier connects directly to the input of the ADC. See 5 Ordering Information
for available part types. Shunt resistances from 736
µΩ to as low as 50µΩ can be accommodated,
depending on desired current range and part type.


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