Datasheet

MSP430FE42xA
MIXED SIGNAL MICROCONTROLLER
SLAS588 -- FEBRUARY 2008
28
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
ESP430CE1A, SD16 and ESP430 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(V): 1, GAIN(I1): 1, I2: off 3V 2.0 2.6
S
D
1
6
L
P
0
,
f
MCLK
=4MHz,
f
f
/
4
GAIN(V): 1, GAIN(I1): 32, I2: off 3V 2.4 3.3
Total digital and
a
n
a
l
o
g
s
u
p
p
l
y
f
SD16
=
f
MCLK
/
4,
S
D
1
6
R
E
F
O
N
=
1
,
GAIN(V): 1, GAIN(I1): 1, GAIN(I2): 1 3V 2.7 3.6
I
analog supply
current when
S
D
1
6
R
E
F
O
N
=
1
,
SD16VMIDON = 0
GAIN(V): 1, GAIN(I1): 32, GAIN(I2): 32 3V 3.4 4.9
m
A
I
ESP430
c
u
r
r
e
n
t
w
h
e
n
ESP430 and SD16
i
SD16LP = 1,
GAIN(V): 1, GAIN(I1): 1, I2: off 3V 1.5 2.1
m
A
active
(
I
A
V
C
C
+
I
D
V
C
C
)
S
D
1
6
L
P
1
,
f
MCLK
=2MHz,
f
f
/
4
GAIN(V): 1, GAIN(I1): 32, I2: off 3V 1.6 2.1
(
I
AVCC
+
I
DVCC
)
f
SD16 =
f
MCLK
/
4,
S
D
1
6
R
E
F
O
N
=
1
,
GAIN(V): 1, GAIN(I1): 1, GAIN(I2): 1 3V 2.1 2.8
S
D
1
6
R
E
F
O
N
=
1
,
SD16VMIDON = 0
GAIN(V): 1, GAIN(I1): 32, GAIN(I2): 32 3V 2.2 3.0
A
n
a
l
o
g
s
u
p
p
l
y
S
D
1
6
L
P
=
0
,
GAIN:1,2 3V 650 950
A
nalog supply
current: 1 active
S
D
1
6
L
P
=
0
,
f
SD16
=1MHz,
GAIN:4,8,16 3V 730 1100
I
S
D
1
6
c
u
r
r
e
n
t
:
1
a
c
t
i
v
e
SD16 channel
f
S
D
1
6
1
M
H
z
,
SD16OSR = 256
GAIN: 32 3V 1050 1550
μ
A
I
SD16
including internal
re
f
erence
(
ESP430
SD16LP = 1,
f
0
5
M
H
z
GAIN: 1 3V 620 930
μ
A
r
e
f
e
r
e
n
c
e
(
E
S
P
4
3
0
disabled)
f
SD16
=0.5MHz,
SD16OSR = 256
GAIN: 32 3V 700 1060
f
MAINS
Mains frequency
range
33 80 Hz
f
Analog front-end
i
n
p
u
t
c
l
o
c
k
SD16LP = 0 (Low power mode disabled) 3V 1
M
H
z
f
SD16
input clock
frequency
SD16LP = 1 (Low power mode enabled) 3V 0.5
MHz
ESP430CE1A, SD16 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
D
i
f
f
e
r
e
n
t
i
a
l
i
n
p
u
t
voltage range for
s
p
e
c
i
f
i
e
d
SD16GAINx = 4, SD16REFON = 1 ±125
m
V
V
ID
speci
f
ied
p
e
r
f
o
r
m
a
n
c
e
SD16GAINx = 8, SD16REFON = 1 ±62
m
V
p
e
r
f
o
r
m
a
n
c
e
(see Note 2)
SD16GAINx = 16, SD16REFON = 1
±31
(
s
e
e
N
o
t
e
2
)
SD16GAINx = 32, SD16REFON = 1 ±15
Z
Input impedance
(
o
n
e
i
n
p
u
t
p
i
n
t
o
f
SD16
= 1MHz, SD16GAINx = 1 3V 200
k
Ω
Z
I
(one input pin to
AV
SS
)
f
SD16
= 1MHz, SD16GAINx = 32 3V 75
kΩ
Z
Differential Input
i
m
p
e
d
a
n
c
e
f
SD16
= 1MHz, SD16GAINx = 1 3V 300 400
k
Ω
Z
ID
impedance
(IN+ to IN--)
f
SD16
= 1MHz, SD16GAINx = 32 3V 100 150
kΩ
V
I
Absolute input
voltage range
AV
SS
-- 1 V
AV
CC
V
V
IC
Common-mode
input voltage range
AV
SS
-- 1 V
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
.IfV
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--
.