71M6103 Maxim, 71M6103 Datasheet - Page 5

• Manufacturer Part Number: 71M6103
• Description: The 71M6103/71M6113/71M6201/71M6203/71M6601/71M6603 (71M6xxx) isolated sensor ICs enable Teridian's 4th-generation polyphase-metering 71M654x systems-on-chips (SoCs) to use nonisolating sensors such as resistive shunts without the need for costly and
• Manufacturer: Maxim

of TRIMBGA to TRIMBGD and TRIMT depends on the part number (see
The control commands listed in
71M6xxx:
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.
PDS_6xxx_010
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
operation along with the type and format of data sent back by the 71M6xxx isolated sensors.
Note: TRIMBGA to TRIMBGD and TRIMT are values used for characterizing the individual 71M6xxx over temperature. Availability
The remote interface commands listed in
from the 71M6xxx:
3
3.1
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
for available part types. Shunt resistances from 736µΩ to as low as 50µΩ can be accommodated,
depending on desired current range and part type.
v1.2
RCMD[4:2]
001
001
001
001
010
010
010
110
•
•
•
•
•
•
•
Output of the temperature sensor
Information on how the device is characterized over temperature
Supply voltage
Chip version code
Read the 71M6xxx temperature sensor
Read the 71M6xxx VCC sensor
Hardware reset
APPLICATIONS INFORMATION
Product Selection
shows the allowable combinations of values in RCMD[4:2] and TMUXRn[2:0] , and the achieved
TMUXRn[2:0]
00X
01X
10X
11X
00X
01X
10X
111
© 2008–2011 Teridian Semiconductor Corporation
Table 1: Remote Interface Commands
Operation/Command
Chip-characteristic
Table 1
temperature data
Supply voltage
Temperature
Chip version
Reset
Read
Table 1
enable the 71M654x to initiate the following actions in the
enable the 71M654x to gather the following information
Table 10
TRIMT (see note), use bits [8:1]
TRIMBGC (see note), use bits [15:6]
TRIMBGA (see note), use bits [15:8]
TRIMBGB bits [15:8], TRIMBGD bits [7:0]
(see note)
Output of the temperature sensor, bits [10:0]
Supply voltage measurement , bits [7:0]
Chip version code, use bits [15:8]
—
for details)
.
R6K_RD [15:0]
5 Ordering Information
71M6xxx Data Sheet
5