71M6533 Datasheet, PDF (109/124 Pages) Teridian Semiconductor Corporation – Energy Meter IC

FDS_6533_6534_004
71M6533/71M6534 Data Sheet
5.4.16 ADC Converter, V3P3A Referenced
Table 80 shows the performance specifications for the ADC converter, V3P3A referenced. For this data,
FIR_LEN=2, [M40MHZ, M26MHZ]=[00], unless stated otherwise, VREF_DIS=0. LSB values do not include
the 8-bit left shift at the CE input.
Table 80: ADC Converter Performance Specifications
Parameter
Condition
Min
Typ
Max Unit
Recommended Input Range
(Vin-V3P3A)
-250
250 mV
peak
Voltage to Current Crosstalk
Vin = 200 mV peak,
-10
10⁶ *Vcrosstalk _{cos(∠Vin − ∠Vcrosstalk)}
Vin
65 Hz, on VA.
Vcrosstalk = largest
measurement on IA or IB
THD (First 10 harmonics): ¹
Vin=65 Hz,
250 mV-pk
64 kpts FFT, Blackman-
20 mV-pk
Harris window
10
μV/V
-75
dB
-90
dB
Input Impedance
At 65 Hz
40
90
kΩ
Temperature coefficient of Input Im-
pedance
At 65 Hz
1.7
Ω/°C
LSB size
[M40MHZ,
V_LSB
= V_REF
⋅ ^1.25 ⋅  ³ ³
4.75  L 
M26MHZ] =
[00], [10], or [11]
L = FIR length
[M40MHZ,
M26MHZ] =
[01]
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
3231
355
150
1319
150
42
nV/LSB
nV/LSB
Digital Full Scale
 L ³

³ï£¸
L = FIR length
[M40MHZ,
M26MHZ] =
[00], [10], or [11]
[M40MHZ,
M26MHZ] =
[01]
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
± 97336
LSB
± 884736
± 2097152
± 238328
LSB
± 2097152
± 7529536
ADC Gain Error vs
%Power Supply Variation
Vin=200 mV pk, 65 Hz
V3P3A=3.0 V, 3.6 V
50 PPM /
%
10⁶ ∆Nout_PK 357nV /V_IN
100 ∆V 3P3A / 3.3
Input Offset (Vin-V3P3A)
-10
10
mV
v1.1
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