Datasheet

STPM10 Electrical characteristics
Doc ID 17728 Rev 4 9/53
4 Electrical characteristics
V
CC
= 5 V, T
A
= 25 °C,100 nF to 1 µF between V
DDA
and V
SS
, 100 nF to 1 µF between V
DDD
and V
SS
, 100 nF to 1 µF between V
CC
and V
SS
unless otherwise specified.
Table 5. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
Energy measurement accuracy
f
BW
Effective bandwidth Limited by digital filtering (-3 dB) 4 800 Hz
e
AW
Accuracy of active power Over 1 to 1000 of dynamic range 0.1 %
e
RW
Accuracy of reactive power
Over 1 to 1000 of dynamic range
0.1 %
e
SW
Accuracy of apparent power Over 1 to 500 of dynamic range 0.1 %
SNR Signal-to-noise ratio Over the entire bandwidth 52 db
PSRR
DC
Power supply DC rejection
Voltage signal: 200 mV
rms
/50Hz
Current signal: 10 mV
rms
/50Hz
f
CLK
= 4.194 MHz
V
CC
=3.3V±10%, 5V±10%
0.2 %
PSRR
AC
Power supply AC rejection
Voltage signal: 200 mV
rms
/50 Hz
Current signal: 10 mV
rms
/50 Hz
f
CLK
= 4.194 MHz
V
CC
=3.3 V+0.2 V
rms
1@100 Hz
V
CC
=5.0 V+0.2 V
rms
1@100 Hz
0.1 %
General section
V
CC
Operating supply voltage 3.165 5.5 V
I
CC
Supply current. Configuration
registers cleared
4 MHz; V
CC
=5 V 3 4 mA
8 MHz; V
CC
=5 V 5 6 mA
POR Power on reset on V
CC
2.5 V
V
DDA
Analog supply voltage 2.85 3.00 3.15 V
V
DDD
Digital supply Voltage 1.725 1.80 1.875 V
f
CLK
Oscillator clock frequency
MDIV bit=0 4.000 4.194 MHz
MDIV bit=1 8.000 8.192 MHz
f
LINE
Nominal line frequency 45 65 Hz
I
LATCH
Current injection latch-up
immunity
300 mA
Analog inputs (I
IP1
, I
IN1
, I
IP2
, I
IN2
, V
IP
, V
IN
)
V
MAX
Maximum input signal levels
Voltage channel -0.3 +0.3 V
Current channels:
Gain 8X -0.15 +0.15 V
Gain 32X -0.035 +0.035