Datasheet

MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
52
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
R
O/P(OAx)
Max
0.2V
AV
CC
AV
CC
−0.2V
V
OUT
Min
R
Load
AV
CC
C
Load
2
I
Load
OAx
O/P(OAx)
Figure 25. OAx Output Resistance Tests
operational amplifier OA, dynamic specifications (MSP430x22x4 only)
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
Fast Mode 1.2
SR Slew rate
Medium Mode 0.8
V/μs
SR
Slew
rate
Slow Mode 0.3
V/μs
Open-loop voltage gain 100 dB
φ
m
Phase margin C
L
= 50 pF 60 deg
Gain margin C
L
= 50 pF 20 dB
Noninverting, Fast Mode,
R
L
= 47 kΩ, C
L
= 50 pF
2.2
GBW
Gain-bandwidth product
(see Figure 26 and Figure 27)
Noninverting, Medium Mode,
R
L
=300 kΩ, C
L
= 50pF
2.2 V/3 V
1.4
MHz
(see
Figure
26
and
Figure
27)
Non-inverting, Slow Mode,
R
L
=300 kΩ, C
L
= 50pF
0.5
t
en(on)
Enable time on t
on
, Noninverting, Gain = 1 2.2 V/3 V 10 20 μs
t
en(off)
Enable time off 2.2 V/3 V 1 μs
Figure 26
Input Frequency − kHz
−80
−60
−40
−20
0
20
40
60
80
100
120
140
1 10 100 1000 10000 100000
TYPICAL OPEN-LOOP GAIN vs FREQUENCY
Slow Mode
Fast Mode
Gain − dB
Medium Mode
Figure 27
Input Frequency − kHz
−250
−200
−150
−100
−50
0
1 10 100 1000 10000 100000
TYPICAL PHASE vs FREQUENCY
Phase − degrees
Slow Mode
Fast Mode
Medium Mode