Datasheet

MSP430FG47x
MIXED SIGNAL MICROCONTROLLER
SLAS580D -- OCTOBER 2008 -- REVISED MARCH 2011
53
POST OFFICE BOX 655303  DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
operational amplifier OA, dynamic specifications
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
Fast Mode 1.2
SR Slew rate
Medium Mode
0.8
V/s
S
R
S
l
e
w
r
a
t
e
Slow Mode 0.3
V
/

s
Open-loop voltage gain 100 dB

m
Phase margin C
L
=50pF 60 deg
Gain margin C
L
=50pF 20 dB
Noninverting, Fast Mode,
R
L
=47k,C
L
=50pF
2.2
GBW
Gain-bandwidth product
(see Figure 27 and Figure 28)
Noninverting, Medium Mode,
R
L
= 300 k,C
L
= 50pF
2.2 V/3 V
1.4
MHz
(
s
e
e
F
i
g
u
r
e
2
7
a
n
d
F
i
g
u
r
e
2
8
)
Non-inverting, Slow Mode,
R
L
= 300 k,C
L
= 50pF
0.5
t
en(on)
Enable time on t
on
, Noninverting, Gain = 1 2.2 V/3 V 10 20 s
t
en(off)
Enable time off 2.2 V/3 V 1 s
Figure 27
Input Frequency -- kHz
-- 8 0
-- 6 0
-- 4 0
-- 2 0
0
20
40
60
80
100
120
140
1 10 100 1000 10000 100000
T
Y
PIC
A
L OPEN-LOOP G
A
IN vs FREQUENC
Y
Slow Mode
Fast Mode
Gain -- dB
Medium Mode
Figure 28
Input Frequency -- kHz
--250
--200
--150
--100
-- 5 0
0
1 10 100 1000 10000 100000
T
Y
PIC
A
LPH
A
SE vs FREQUENC
Y
Phase -- degrees
Slow Mode
Fast Mode
Medium Mode