71M6521DE Datasheet, PDF (91/101 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6521DE/71M6521FE
Energy Meter IC
ADC CONVERTER, V3P3A REFERENCED
FIR_LEN=0, VREF_DIS=0, LSB values do not include the 9-bit left shift at CE input.
DATASHEET
JANUARY 2008
PARAMETER
Recommended Input Range
(Vin-V3P3A)
Voltage to Current Crosstalk:
10⁶ *Vcrosstalk _{cos(∠Vin − ∠Vcrosstalk )}
Vin
CONDITION
Vin = 200mV peak, 65Hz,
on VA
Vcrosstalk = largest
measurement on IA or IB
THD (First 10 harmonics)
250mV-pk
20mV-pk
Input Impedance
Temperature coefficient of Input
Impedance
LSB size
Digital Full Scale
ADC Gain Error vs
%Power Supply Variation
10⁶ ΔNout_PK 357nV /V_IN
100ΔV 3P3A / 3.3
Vin=65Hz,
64kpts FFT, Blackman-
Harris window
Vin=65Hz
Vin=65Hz
FIR_LEN=0
FIR_LEN=1
FIR_LEN=0
FIR_LEN=1
Vin=200mV pk, 65Hz
V3P3A=3.0V, 3.6V
Input Offset (Vin-V3P3A)
MIN
TYP
MAX UNIT
-250
250
mV
peak
-10
10
μV/V
-75
dB
-90
dB
40
90
kΩ
1.7
Ω/°C
357
151
+884736
±2097152
nV/LSB
LSB
50
ppm/%
-10
10
mV
OPTICAL INTERFACE
PARAMETER
OPT_TX VOH (V3P3D-OPT_TX)
OPT_TX VOL
CONDITION
ISOURCE=1mA
ISINK=20mA
MIN
TYP
MAX UNIT
0.4
V
0.7
V
TEMPERATURE SENSOR
PARAMETER
CONDITION
MIN
TYP
MAX UNIT
Nominal Sensitivity (S_n) ^†
Nominal (N_n) ^{† â€} 
TA=25ºC, TA=75ºC,
FIR_LEN = 1
Nominal relationship:
N(T)= S_n*(T-T_n)+N_n
-2180
1.0
LSB/ºC
10⁶ LSB
Temperature Error^†
ERR
=
T
−
⎜⎜⎝⎛
(N (T ) −
S_n
N_n
)
+ T_n
⎟⎟⎠⎞
TA = -40ºC to +85ºC
Tn = 25°C
-10
+10
ºC
† _{LSB values do not include the 9-bit left shift at CE input.}
†† _{Nn is measured at Tn during meter calibration and is stored in MPU or CE for use in temperature calculations.}
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