LMP8601MA/NOPB National Semiconductor, LMP8601MA/NOPB Datasheet - Page 14

• Manufacturer Part Number: LMP8601MA/NOPB
• Description: IC AMP CURRENT SENSE 60V 8SOIC
• Manufacturer: National Semiconductor
• Series: LMP®r

Specifications of LMP8601MA/NOPB

• Amplifier Type: Current Sense
• Number Of Circuits: 1
• Slew Rate: 0.83 V/µs
• Gain Bandwidth Product: 60kHz
• Current - Input Bias: 0.04pA
• Voltage - Input Offset: 150µV
• Current - Supply: 1.1mA
• Current - Output / Channel: 48mA
• Voltage - Supply, Single/dual (±): 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• No. Of Amplifiers: 1
• Input Bias Current: 20nA
• Input Offset Voltage: 1mV
• Bandwidth: 60kHz
• Cmrr: 90dB
• Supply Voltage Range: 3V To 5.5V
• Supply Current: 1.1mA
• Rohs Compliant: Yes
• Number Of Channels: 1
• Common Mode Rejection Ratio (min): 80 dB
• Available Set Gain: 26.06 dB
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• For Use With: LMP8601MAEVAL - BOARD EVALUATION FOR LMP8601MA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Details
• Other names: *LM8601MA/NOPB; LMP8601MA

www.national.com
GAIN ADJUSTMENT
The gain of the LMP8601/LMP8601Q is 20; however, this
gain can be adjusted as the signal path in between the two
internal amplifiers is available on the external pins.
R
100 kΩ resistor such that the reduced gain G
Given a desired value of the reduced gain G
tion the required value for R
r
creates a resistive divider together with the internal
r
can be calculated with:
FIGURE 2. Second Order Low Pass Filter
r
, using this equa-
r
becomes:
FIGURE 3. Reduce Gain
K1 = 10, K2 = 2
K2 = 2
14
Reduce Gain
Figure 3
the gain of the LMP8601/LMP8601Q.
Increase Gain
Figure 4
the gain of the LMP8601/LMP8601Q.
R
of the buffer amplifier. The positive feedback increases the
gain. The increased gain G
i
creates positive feedback from the output pin to the input
shows the configuration that can be used to increase
shows the configuration that can be used to reduce
20157156
i
becomes:
20157155