71M6531D Datasheet, PDF (101/115 Pages) Teridian Semiconductor Corporation – Energy Meter IC

FDS 6531/6532 005
Data Sheet 71M6531D/F-71M6532D/F
5.4.15 ADC Converter, V3P3A Referenced
Table 78 shows the performance specifications for the ADC converter, V3P3A referenced. For this data,
FIR_LEN=0, VREF_DIS=0 and LSB values do not include the 8-bit left shift at the CE input.
Table 78: ADC Converter Performance Specifications
Parameter
Recommended Input Range
(Vin-V3P3A)
Voltage to Current Crosstalk
10⁶ *Vcrosstalk _{cos(∠Vin − ∠Vcrosstalk)}
Vin
THD (First 10 harmonics) ¹:
250 mV-pk
20 mV-pk
Input Impedance
Temperature coefficient of Input Im-
pedance
LSB size
[M40MHZ,
V_LSB
= V_REF
⋅ ^1.25
4.75
⋅ 

3 ³

L
M26MHZ] =
[00], [10], or [11]
L = FIR length
[M40MHZ,
M26MHZ] =
[01]
Digital Full Scale
 L ³

3
L = FIR length
[M40MHZ,
M26MHZ] =
[00], [10], or [11]
[M40MHZ,
M26MHZ] =
[01]
Condition
Vin = 200 mV peak,
65 Hz, on VA.
Vcrosstalk = largest
measurement on IA or IB
Vin=65 Hz,
64 kpts FFT, Blackman-
Harris window
CKCE = 5 MHz
Vin = 65 Hz
Vin = 65 Hz
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
Min
-250
-10
40
Typ
1.7
3231
355
150
1319
150
42
±97336
±884736
±2097152
±238328
±2097152
±7529536
Max
250
10
-75
-90
90
Unit
mV
peak
μV/V
dB
dB
kΩ
Ω/°C
nV/
LSB
nV/
LSB
LSB
LSB
ADC Gain Error versus
%Power Supply Variation
10⁶ ∆Nout_PK 357nV /V_IN
100 ∆V 3P3A / 3.3
Vin=200 mV pk, 65 Hz
V3P3A=3.0 V, 3.6 V
50 ppm/%
Input Offset (Vin-V3P3A)
-10
10
mV
v1.2
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