MSP430F6779A Datasheet, PDF (52/176 Pages) Texas Instruments – Polyphase Metering SoCs

MSP430F6779A, MSP430F6778A, MSP430F6777A, MSP430F6776A, MSP430F6775A
MSP430F6769A, MSP430F6768A, MSP430F6767A, MSP430F6766A, MSP430F6765A
MSP430F6749A, MSP430F6748A, MSP430F6747A, MSP430F6746A, MSP430F6745A
SLAS982 – MAY 2014
www.ti.com
5.8.8 SD24_B
Table 5-39. 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
Common-mode input voltage
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 - 1
AV_SS - 1
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
V_ID
Differential input voltage for specified
performance ⁽¹⁾
REFON = 1
SD24GAINx = 8
SD24GAINx = 16
±112
±56
±120
±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 1.125 V. 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 100 nF is recommended to reduce any reference voltage noise.
Table 5-40. SD24_B Analog Input ⁽¹⁾
PARAMETER
TEST CONDITIONS
V_CC
SD24GAINx = 1
SD24GAINx = 2
C_I
Input capacitance
SD24GAINx = 4
SD24GAINx = 8
SD24GAINx = 16
SD24GAINx = 32, 64, 128
Z_I
Input impedance
(pin A+ or A- to AV_SS)
f_SD24 = 1 MHz
SD24GAINx = 1
3V
SD24GAINx = 8
3V
SD24GAINx = 32
3V
Z_ID
Differential input impedance
(pin A+ to pin A-)
f_SD24 = 1 MHz
SD24GAINx = 1
3V
SD24GAINx = 8
3V
SD24GAINx = 32
3V
(1) All parameters pertain to each SD24_B converter.
MIN TYP MAX UNIT
5.0
5.0
5.0
pF
5.0
5.0
5.0
200
200
kΩ
200
300 400
400
kΩ
300 400
52
Specifications
Copyright © 2014, Texas Instruments Incorporated
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MSP430F6769A MSP430F6768A MSP430F6767A MSP430F6766A MSP430F6765A MSP430F6749A
MSP430F6748A MSP430F6747A MSP430F6746A MSP430F6745A