LPV531MK/NOPB National Semiconductor, LPV531MK/NOPB Datasheet - Page 12

• Manufacturer Part Number: LPV531MK/NOPB
• Description: IC OPAMP PROG R-R OUT TSOT23-6
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LPV531MK/NOPB

• Amplifier Type: General Purpose
• Number Of Circuits: 1
• Output Type: Rail-to-Rail
• Slew Rate: 2.5 V/µs
• Gain Bandwidth Product: 4.6MHz
• Current - Input Bias: 0.05pA
• Voltage - Input Offset: 1000µV
• Current - Supply: 425µA
• Current - Output / Channel: 24mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-6, TSOT-6
• Number Of Channels: 1
• Voltage Gain Db: 128 dB
• Common Mode Rejection Ratio (min): 72 dB
• Input Offset Voltage: 4.5 mV at 5 V
• Operating Supply Voltage: 5 V
• Supply Current: 0.53 mA at 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Details
• Other names: LPV531MK; LPV531MKTR

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Application Information
The LPV531 is an extremely versatile operational amplifier
because performance and power consumption can be ad-
justed during operation. This provides a method to dynami-
cally optimize the supply current, the bandwidth and the
output short circuit current in the application. The power level
can be set by the current drawn from the I
to the application performance requirements.
CIRCUIT TOPOLOGY
As shown in Figure 1, the LPV531 contains two internal bias
reference generators that deliver a reference current (I
to the amplifier core. The programmable bias generator gen-
POWER MODE CONTROL
To illustrate typical configurations three possible solutions to
control the power mode(s) of the LPV531 will be described.
1. Single Power Mode
If the application requires one single power mode for the
LPV531, then the easiest way to achieve this is to connect a
resistor (R
internal circuitry, R
the I
internal
V
For a desired supply current, bandwidth, short circuit current,
or load resistance, the required value of R
lated using the equations in the section “DETERMINING
THE I
INT
SEL
= 110 mV. This set up is illustrated in Figure 2.
SEL
pin. Internally the I
series
LEVELS”.
EXT
) from the I
resistor
EXT
will determine the current drawn from
SEL
SEL
(R
INT
pin to V
pin is connected to an 11 kΩ
)
which
−
. Together with the
EXT
SEL
is
FIGURE 1. Simplified Schematic
can be calcu-
pin according
biased
REF
at
)
12
erates a 110 mV reference voltage (V
voltage is converted into a programmable reference current
(I
resistor (R
added to the output current from the low power bias genera-
tor (I
zero and the I
that in this mode the power supply current is below 1 µA. In
this 1 µA power mode, the LPV531 is functional but perfor-
mance over the full temperature range is not guaranteed.
The 1 µA power mode operation is only recommended for
applications with a temperature range between 0 and 70˚C.
PROG
STDB
) through the internal resistor (R
). When the I
EXT
FIGURE 2. Single Power Mode
) connected to the I
REF
equals I
SEL
STDB
pin is left floating, I
. The value of I
SEL
pin. Internally, I
INT
INT
) and the external
). This reference
STDB
PROG
20132336
20132337
PROG
is such
equals
is