LM7131ACM5X National Semiconductor, LM7131ACM5X Datasheet - Page 17

• Manufacturer Part Number: LM7131ACM5X
• Description: IC OP AMP TINY HI SPEED SOT23-5
• Manufacturer: National Semiconductor

Specifications of LM7131ACM5X

• Amplifier Type: Voltage Feedback
• Number Of Circuits: 1
• Slew Rate: 150 V/µs
• Gain Bandwidth Product: 70MHz
• -3db Bandwidth: 90MHz
• Current - Input Bias: 20µA
• Voltage - Input Offset: 20µV
• Current - Supply: 7.5mA
• Current - Output / Channel: 65mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 12 V, ± 2.5 V ~ 6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Output Type: -
• Other names: LM7131ACM5XTR

Notes on Performance Curves and Datasheet Limits
Numbers in parentheses are measured
fixture capacitances w/o DUT and load.
Using the LM7131
LIMITS AND PRECAUTIONS
Supply Voltage
The absolute maximum supply voltage which may be ap-
plied to the LM7131 is 12V. Designers should not design for
more than 10V nominal, and carefully check supply toler-
ances under all conditions so that the voltages do not ex-
ceed the maximum.
Differential Input Voltage
Differential input voltage is the difference in voltage between
the non-inverting (+) input and the inverting input (−) of the
op amp. The absolute maximum differential input voltage is
no power supplied to the op amp. This may not be a problem
in most conventional op amp designs, however, designers
should avoid using the LM7131 as comparator or forcing the
inputs to different voltages. In some designs, diode protec-
tion may be needed between the inputs. See Figure 12.
±
2V across the inputs. This limit also applies when there is
FIGURE 12.
Gain of +2
FIGURE 11. Flash A/D A
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Output Short Circuits
The LM7131 has output short circuit protection, however, it is
not designed to withstand continuous short circuits, very fast
high energy transient voltage or current spikes, or shorts to
any voltage beyond the power supply rails. Designs should
reduce the number and energy level of any possible output
shorts, especially when used with
A resistor in series with the output, such as the 75Ω resistor
used to back terminate 75Ω cables, will reduce the effects of
shorts. For outputs which will send signals off the PC board
additional protection devices, such as diodes to the power
rails, zener-type surge suppressors, and varistors may be
useful.
Thermal Management
Note that the SOT23-5 (Tiny) package has less power dis-
sipation capability (325˚/W) than the S0-8 package (115˚/W).
This may cause overheating with
loads at high ambient temps. This is less of a problem when
using +5V single supplies.
Example:
Driving a 150Ω load to 2.0V at a 40˚C (104 ˚F) ambient
temperature. (This is common external maximum tempera-
ture for office environments. Temperatures inside equipment
may be higher.)
No load power-
No load LM7131 supply current - 9.0 mA
Supply voltage is 5.0V
No load LM7131 power - 9.0 mA x 5.0V = 45 mW
Power with load-
Current out is 2.0V/150 Ω = 13.33 mA
Voltage drop in LM7131 is 5.0V (supply) − 2.0V (output) =
3.0V
Power dissipation 13.33 mA x 3.0V = 40 mW
Total Power = 45 mW + 40 mW = 85 mW = 0.085
V
= +10
(Continued)
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±
±
5V supplies.
5 supplies and heavy
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