Datasheet
ECCN 5E002 TSPA - Technology / Software Publicly Available
MSP430F677x
,
MSP430F676x
,
MSP430F674x
www.ti.com
SLAS768D –SEPTEMBER 2012–REVISED DECEMBER 2013
SD24_B Power Supply and Recommended Operating Conditions
MIN TYP MAX UNIT
AV
CC
Analog supply voltage AV
CC
= DV
CC
, AV
SS
= DV
SS
= 0 V 2.4 3.6 V
T
A
Ambient temperature -40 85 °C
f
SD
Modulator clock frequency 0.03 2.3 MHz
V
I
Absolute input voltage range AV
SS
- 1V AV
CC
V
V
IC
Common-mode input voltage range AV
SS
- 1V AV
CC
V
Bipolar Mode, V
ID
= V
I,A+
- V
I,A-
V
REF
/GAIN +V
REF
/GAIN
V
ID,FS
Differential full scale input voltage mV
Unipolar Mode, V
ID
= V
I,A+
- V
I,A-
0 +V
REF
/GAIN
SD24GAINx = 1 ±900 ±930
SD24GAINx = 2 ±450 ±460
SD24GAINx = 4 ±225 ±230
SD24GAINx = 8 ±112 ±120
Differential input voltage for specified
V
ID
REFON = 1 mV
SD24GAINx = 16 ±56 ±60
performance
(1)
SD24GAINx = 32 ±28 ±30
SD24GAINx = 64 ±14 ±14
SD24GAINx =
±7 ±7.25
128
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 TEST CONDITIONS V
CC
MIN TYP MAX UNIT
SD24GAINx = 1 5.0
SD24GAINx = 2 5.0
SD24GAINx = 4 5.0
C
I
Input capacitance pF
SD24GAINx = 8 5.0
SD24GAINx = 16 5.0
SD24GAINx = 32, 64, 128 5.0
SD24GAINx = 1 3 V 200
Input impedance
Z
I
f
SD24
= 1MHz SD24GAINx = 8 3 V 200 kΩ
(pin A+ or A- to AV
SS
)
SD24GAINx = 32 3 V 200
SD24GAINx = 1 3 V 300 400
Differential input impedance
Z
ID
f
SD24
= 1MHz SD24GAINx = 8 3 V 400 kΩ
(pin A+ to pin A-)
SD24GAINx = 32 3 V 300 400
(1) All parameters pertain to each SD24_B converter.
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