MSP430F2274-EP_1 Datasheet, PDF (46/77 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F2274-EP
SLAS614C – SEPTEMBER 2008 – REVISED JULY 2010
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Operational Amplifier (OA) Dynamic Specifications – Electrical Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
Fast Mode
T_A
V_CC
MIN TYP
1.2
SR
Slew rate
Medium Mode
0.8
Slow Mode
0.3
Open-loop voltage gain
100
fm
Phase margin
C_L = 50 pF
60
Gain margin
C_L = 50 pF
20
Noninverting, Fast Mode,
R_L = 47 kΩ, C_L = 50 pF
2.2
GBW
Gain-bandwidth product
Noninverting, Medium Mode,
(see Figure 26 and Figure 27) R_L = 300 kΩ, C_L = 50 pF
2.2 V/3 V
1.4
Noninverting, Slow Mode,
R_L = 300 kΩ, C_L = 50 pF
0.5
t_en(on)
Enable time on
t_on, noninverting, Gain = 1
–55°C to 125°C 2.2 V/3 V
10
t_en(off)
Enable time off
–55°C to 125°C 2.2 V/3 V
MAX UNIT
V/ms
dB
deg
dB
MHz
20 ms
1 ms
TYPICAL OPEN-LOOP GAIN vs FREQUENCY
140
120
100
80
Fast Mode
60
40
Medium Mode
20
0
Slow Mode
−20
−40
−60
−80
1
10
100
1000 10000 100000
Input Frequency − kHz
Figure 26.
TYPICAL PHASE vs FREQUENCY
0
−50
−100
−150
−200
Fast Mode
Medium Mode
Slow Mode
−250
1
10
100
1000
Input Frequency − kHz
Figure 27.
10000 100000
Operational Amplifier OA Feedback Network, Resistor Network – Electrical Characteristics⁽¹⁾
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
R_total
R_unit
PARAMETER
Total resistance of resistor
string
Unit resistor of resistor string⁽²⁾
TEST CONDITIONS
T_A
MIN TYP
96
6
MAX
UNIT
kΩ
kΩ
(1) A single resistor string is composed of 4 R_unit + 4 R_unit + 2 R_unit + 2 R_unit + 1 R_unit + 1 R_unit + 1 R_unit + 1 R_unit = 16 R_unit = R_total.
(2) For the matching (i.e., the relative accuracy) of the unit resistors on a device, refer to the gain and level specifications of the respective
configurations.
46
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