STPM11ATR STMicroelectronics, STPM11ATR Datasheet - Page 20

• Manufacturer Part Number: STPM11ATR
• Description: IC ENERGY METER 1 PHASE 20TSSOP
• Manufacturer: STMicroelectronics

Specifications of STPM11ATR

• Input Impedance: 100 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 1.5V
• Voltage - I/o Low: 0.8V
• Current - Supply: 4.7mA
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Meter Type: Single Phase
• Output Voltage: +/- 0.4 V
• Output Current: 150 mA
• Input Voltage: 3 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5984-2

Theory of operation
Figure 16. Bandgap temperature variation
7.7
Table 12.
20/46
LTCH
0
1
2
3
bias currents and voltages for all other analog modules and for the OTP module. The
bandgap voltage temperature behavior can be changed in order to better compensate the
variation of sensor sensitivity with temperature. This task is performed with the BGTC
configuration bits.
Load monitoring
The STPM1X include a no-load condition detection circuit with adjustable threshold. This
circuit monitors the voltage and the current channels and, when the measured power is
below the set threshold, the internal signal BIL becomes high. The information about this
signal is also available in the status bit BIL.
The no load condition occurs when the product between V
below a given value. This value can be set with the LTCH configuration bits, and it is also
dependent on the selected current gain (Ai) and the calibration registers constant Kp=Kv*Ki.
Four different no-load threshold values can be chosen according to the two configurations
bits LTCH (see
No load detection thresholds
When a no-load condition occurs (BIL=1), the integration of power is suspended and the
tamper module is disabled.
If a no-load condition is detected, the BIL signal blocks generation of pulses for stepper and
forces the SCLNLC pin to be low.
V
RMS
* I
Rogowski coil (PST<2)
RMS
0.004488 / (Ai*Kp)
0.008976 / (Ai*Kp)
0.017952 / (Ai*Kp)
0.035904 / (Ai*Kp)
Table
(input channel voltages)
12).
Doc ID 13167 Rev 7
V
RMS
STPM11, STPM12, STPM13, STPM14
* I
RMS
RMS
Ct or Shunt (PST>1)
0.003648 / (Ai*Kp)
0.007296 / (Ai*Kp)
0.014592 / (Ai*Kp)
0.029184 / (Ai*Kp)
(input channel voltages)
and I
RMS
input values is