Datasheet

MSP430F42x
MIXED SIGNAL MICROCONTROLLER
SLAS421A − APRIL 2004 − REVISED JUNE 2007
28
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
SD16, power supply and recommended operating conditions
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
AV
CC
Analog supply
voltage
AV
CC
= DV
CC
AV
SS
= DV
SS
= 0V
2.7 3.6 V
SD16LP
=
0,
GAIN: 1, 2 3 V 650 950
Analog supply
t1 ti
SD16LP
=
0
,
f
SD16
= 1 MHz,
GAIN: 4, 8, 16 3 V 730 1100
I
SD16
current: 1 active
SD16 channel
f
SD16
1
MHz,
SD16OSR = 256
GAIN: 32 3 V 1050 1550
μA
I
SD16
SD16
channel
including internal
reference
SD16LP = 1,
f 0 5 MHz
GAIN: 1 3 V 620 930
μ
A
reference
f
SD16
= 0.5 MHz,
SD16OSR = 256
GAIN: 32 3 V 700 1060
f
Analog front-end
input clock
SD16LP = 0 (Low power mode disabled) 3 V 1
MHz
f
SD16
input clock
frequency
SD16LP = 1 (Low power mode enabled) 3 V 0.5
MHz
SD16, analog input range (see Note 1)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
SD16GAINx = 1, SD16REFON = 1 ±500
Differential input
SD16GAINx = 2, SD16REFON = 1 ±250
V
Differential
input
voltage range for
specified
SD16GAINx = 4, SD16REFON = 1 ±125
mV
V
ID
specified
performance
SD16GAINx = 8, SD16REFON = 1 ±62
mV
performance
(see Note 2)
SD16GAINx = 16, SD16REFON = 1 ±31
(see
Note
2)
SD16GAINx = 32, SD16REFON = 1 ±15
Z
Input impedance
(one input pin
f
SD16
= 1MHz, SD16GAINx = 1 3 V 200
kΩ
Z
I
(one input pin
to AV
SS
)
f
SD16
= 1MHz, SD16GAINx = 32 3 V 75
kΩ
Z
Differential
input impedance
f
SD16
= 1MHz, SD16GAINx = 1 3 V 300 400
kΩ
Z
ID
input impedance
(IN+ to IN−)
f
SD16
= 1MHz, SD16GAINx = 32 3 V 100 150
kΩ
V
I
Absolute input
voltage range
AV
SS
-
1.0V
AV
CC
V
V
IC
Common-mode
input voltage range
AV
SS
-
1.0V
AV
CC
V
NOTES: 1. All parameters pertain to each SD16 channel.
2. The analog input range depends on the reference voltage applied to V
REF
. If V
REF
is sourced externally, the full-scale range
is defined by V
FSR+
= +(V
REF
/2)/GAIN and V
FSR−
= −(V
REF
/2)/GAIN. The analog input range should not exceed 80% of
V
FSR+
or V
FSR−
.