MSP430FG6626 Datasheet, PDF (61/171 Pages) Texas Instruments – Mixed-Signal Microcontrollers

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MSP430FG6626, MSP430FG6625
MSP430FG6426, MSP430FG6425
SLAS874 – MAY 2015
5.5.14 Operational Amplifier
Table 5-46. Operational Amplifier, OA0, OA1, PGA Buffers
over operating free-air temperature range (unless otherwise noted)
PARAMETER
V_CC
Analog supply
voltage
TEST CONDITIONS
AV_CC = DV_CC, AV_SS = DV_SS = 0 V
V_CC
MIN
2.2
External charge
C_CPCAP
pump capacitor to Required when charge pump is enabled
20
AVSS.
I_{CP_PEAK}
Charge pump peak
current
OARRI = 0h to 1h, I_{CP_LOAD} = 0 μA
I_CP
Charge pump
average current
OARRI = 1h, I_{CP_LOAD} = 100 μA
t_{CP_EN_fast}
OARRI = 0h to 1h, I_{CP_LOAD} = 0 μA,
Charge pump enable AFE biases previously enabled and settled
time fast
which can be done with REFON=1 or other
modules requesting REFON.
t_{CP_EN_slow}
Charge pump enable OARRI = 0h to 1h, I_{CP_LOAD} = 0 μA,
time slow
Includes AFE bias settling
I_OA
Supply current, per I_O = 0 mA,
opamp
OARRI = 0h (charge pump disabled)
V_OS
dV_OS/dT
Input offset voltage
Input offset voltage
temperature drift
Noninverting, unity gain
Noninverting, unity gain
dV_OS/dV
Input offset voltage
voltage drift
Noninverting, unity gain
Differential
C_in
Input capacitance
Common mode
PSRR_DC
Power supply
rejection ratio, DC
Noninverting, unity gain,
V_INP = positive input of OA = 1 V
OARRI = 0h,
V_CM
Common mode
voltage range⁽²⁾
Noninverting, unity gain
OARRI = 1h,
Noninverting, unity gain
0.1
0.1
CMRR_DC
Common mode
rejection ratio, DC
Over common-mode voltage range
e_n
Input voltage noise ^{f = 100 Hz, OARRI = 0h or 1h}
density
f = 50 kHz, OARRI = 0h or 1h
3.0 V
3.0 V
A_OL
Open-loop voltage
gain, DC
GBW
Gain-bandwidth
product
C_L = 100 pF, OAM = 1h
SR
t_SETTLE
Slew rate
Settling time
Noninverting, unity gain,
C_L = 100 pF, OAM = 1h
Noninverting, unity gain,
2.0-V step, 0.1%, OAM = 1h
3.0 V
V_O
Voltage output swing –250 μA ≤ I_O ≤ 250 μA,
from rail
Noninverting, unity gain (OAM = 1h)
TYP
MAX
3.6
22
24
1.6
570 ⁽¹⁾
710 ⁽¹⁾
50
75
105 ⁽¹⁾
±2
±1
130 ⁽¹⁾
±3
4
6
50
V_CC - 1.0
V_CC - 0.1
110
90
25
95
800
0.4
5.3
5
55
UNIT
V
nF
mA
μA
μs
μs
μA
mV
μV/°C
μV/V
pF
pF
μV/V
V
V
dB
nV/√Hz
dB
kHz
V/μs
μs
mV
(1) Refer to Table 5-47 to calculate total current from OA for different use cases.
(2) The common-mode input range is measured with the OA in a unity-gain source-follower configuration. The input signal is swept from 0 V
to V_CC, and the output of the OA is monitored. The minimum and maximum values represent when the input and output differ more than
10 mV, not including the offset, V_OS.
Copyright © 2015, Texas Instruments Incorporated
Specifications
61
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