MSP430F677X1_16 Datasheet, PDF (83/162 Pages) Texas Instruments – Polyphase Metering SoCs

MSP430F677x1, MSP430F676x1, MSP430F674x1
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SLAS815C – NOVEMBER 2012 – REVISED DECEMBER 2013
SD24_B Power Supply and Recommended Operating Conditions
MIN TYP
MAX UNIT
AV_CC
T_A
f_SD
V_I
V_IC
V_ID,FS
Analog supply voltage
Ambient temperature
Modulator clock frequency
Absolute input voltage range
Common-mode input voltage range
Differential full scale input voltage
AV_CC = DV_CC, AV_SS = DV_SS = 0 V
Bipolar Mode, V_ID = V_I,A+ - V_I,A-
Unipolar Mode, V_ID = V_I,A+ - V_I,A-
SD24GAINx = 1
2.4
-40
0.03
AV_SS - 1V
AV_SS - 1V
V_REF/GAIN
0
±900
3.6
85
2.3
±930
AV_CC
AV_CC
+V_REF/GAIN
+V_REF/GAIN
V
°C
MHz
V
V
mV
SD24GAINx = 2
±450 ±460
SD24GAINx = 4
±225 ±230
SD24GAINx = 8
±112 ±120
V_ID
Differential input voltage for specified
performance ⁽¹⁾
REFON = 1
SD24GAINx = 16
±56
±60
mV
SD24GAINx = 32
±28
±30
SD24GAINx = 64
±14
±14
SD24GAINx =
128
±7 ±7.25
C_REF
VREF load capacitance⁽²⁾
SD24REFS = 1
100
nF
(1) The full-scale range (FSR) is defined by V_FS+ = +V_REF/GAIN and V_FS- = -V_REF/GAIN: FSR = V_FS+ - V_FS- = 2*V_REF/GAIN. If V_REF is
sourced externally, the analog input range should not exceed 80% of V_FS+ or V_FS-; that is, V_ID = 0.8 V_FS- to 0.8 V_FS+. If V_REF is sourced
internally, the given V_ID ranges apply. MIN values are calculated based on a V_REF of 1.125V. TYP values are calculated based on a
V_REF of 1.16 V.
(2) There is no capacitance required on VREF. However, a capacitance of 100nF is recommended to reduce any reference voltage noise.
SD24_B Analog Input ⁽¹⁾
PARAMETER
C_I
Input capacitance
Z_I
Input impedance
(pin A+ or A- to AV_SS)
Z_ID
Differential input impedance
(pin A+ to pin A-)
TEST CONDITIONS
SD24GAINx = 1
SD24GAINx = 2
SD24GAINx = 4
SD24GAINx = 8
SD24GAINx = 16
SD24GAINx = 32, 64, 128
SD24GAINx = 1
f_SD24 = 1MHz
SD24GAINx = 8
SD24GAINx = 32
SD24GAINx = 1
f_SD24 = 1MHz
SD24GAINx = 8
SD24GAINx = 32
(1) All parameters pertain to each SD24_B converter.
V_CC
MIN TYP MAX UNIT
5.0
5.0
5.0
pF
5.0
5.0
5.0
3V
200
3V
200
kΩ
3V
200
3V
300 400
3V
400
kΩ
3V
300 400
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