Datasheet
MSP430AFE2x3
MSP430AFE2x2
MSP430AFE2x1
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SLAS701A –NOVEMBER 2010–REVISED MARCH 2011
SD24_A, Input Range
(1)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
-V
REF
/ +V
REF
/
Bipolar mode, SD24UNI = 0
2GAIN 2GAIN
Differential full scale input
V
ID,FSR
mV
voltage range
+V
REF
/
Unipolar mode, SD24UNI = 1 0
2GAIN
SD24GAINx = 1 ±500
SD24GAINx = 2 ±250
Differential input voltage
SD24GAINx = 4 ±125
V
ID
range for specified SD24REFON = 1 mV
SD24GAINx = 8 ±62
performance
(2)
SD24GAINx = 16 ±31
SD24GAINx = 32 ±15
SD24GAINx = 1 200
Input impedance (one input
Z
I
f
SD24
= 1 MHz 3 V kΩ
pin to AVSS)
SD24GAINx = 32 75
SD24GAINx = 1 300 400
Differential input impedance
Z
ID
f
SD24
= 1 MHz 3 V kΩ
(IN+ to IN-)
SD24GAINx = 32 100 150
V
I
Absolute input voltage range AVSS - 1 AVCC V
Common-mode input voltage
V
IC
AVSS - 1 AVCC V
range
(1) All parameters pertain to each SD24_A channel.
(2) The full-scale range is defined by V
FSR+
= +(V
REF
/2)/GAIN and V
FSR-
= -(V
REF
/2)/GAIN. If VREF is sourced externally, the analog input
range should not exceed 80% of V
FSR+
or V
FSR-
; that is, V
ID
= 0.8 V
FSR-
to 0.8 V
FSR+
. If VREF is sourced internally, the given V
ID
ranges
apply.
SD24_A, Performance (f
SD24
= 1 MHz, SD24OSRx = 256, SD24REFON = 1)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
SD24GAINx = 1 1
SD24GAINx = 2 1.96
SD24GAINx = 4 3.86
G Nominal gain 3 V
SD24GAINx = 8 7.62
SD24GAINx = 16 15.04
SD24GAINx = 32 28.35
SD24GAINx = 1 ±0.2
E
OS
Offset error 3 V %FSR
SD24GAINx = 32 ±1.5
SD24GAINx = 1 ±4 ±20
Offset error temperature ppm
ΔEOS/ΔT 3 V
coefficient FSR/°C
SD24GAINx = 32 ±20 ±100
SD24GAINx = 1, Common-mode input signal:
>90
V
ID
= 500 mV, f
IN
= 50 Hz, 100 Hz
Common-mode rejection
CMRR 3 V dB
ratio
SD24GAINx = 32, Common-mode input signal:
>75
V
ID
= 16 mV, f
IN
= 50 Hz, 100 Hz
AC power supply SD24GAINx = 1, V
CC
= 3 V ± 100 mV,
AC PSRR 3 V >80 dB
rejection ratio f
VCC
= 50 Hz
SD24GAINx = 1, V
ID
= 500 mV,
XT Crosstalk 3 V <-100 dB
f
IN
= 50 Hz, 100 Hz
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