LM7372MR/NOPB National Semiconductor, LM7372MR/NOPB Datasheet - Page 14

• Manufacturer Part Number: LM7372MR/NOPB
• Description: IC OPAMP DUAL HS HI OUTP 8-PSOP
• Manufacturer: National Semiconductor
• Series: VIP™ IIIr

Specifications of LM7372MR/NOPB

• Amplifier Type: Voltage Feedback
• Number Of Circuits: 2
• Slew Rate: 3000 V/µs
• Gain Bandwidth Product: 120MHz
• -3db Bandwidth: 220MHz
• Current - Input Bias: 2.7µA
• Voltage - Input Offset: 2000µV
• Current - Supply: 13mA
• Current - Output / Channel: 260mA
• Voltage - Supply, Single/dual (±): 9 V ~ 36 V, ±4.5 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-PSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Other names: *LM7372MR; *LM7372MR/NOPB; LM7372MR

www.national.com
inverting inputs are returned to ground, see Figure 4 (the pin
numbers in Figure 4 are given for PSOP package, those in
Figure 1 are for the SOIC package). With a split supply, note
that the ground plane and the heatsink copper must be sep-
arate and are at different potentials, with the heatsink (pin 4
of the PSOP, pins 6,1,8,9 &16 of the SOIC) now at a negative
potential (V
In either configuration, the area under the input pins should
be kept clear of copper (Whether ground plane copper or
heatsink copper) to avoid parasitic coupling to the inputs.
PRINTED CIRCUIT BOARD LAYOUT and EVALUATION
BOARDS
Generally, a good high-frequency layout will keep power sup-
ply and ground traces away from the inverting input and
output pins. Parasitic capacitance on these nodes to ground
will cause frequency response peaking and possible circuit
oscillations (see Application Note OA-15 for more informa-
tion). National Semiconductor suggests the following evalua-
tion boards as a guide for high frequency layout and as an aid
in device testing and characterization:
−
).
FIGURE 4. Split Supply Application (PSOP)
14
The LM7372 is stable with non inverting closed loop gains as
low as +2. Typical of any voltage feedback operational am-
plifier, as the closed loop gain of the LM7372 is increased,
there is a corresponding reduction in the closed loop signal
bandwidth. For low distortion performance it is recommended
to keep the closed loop bandwidth at least 10X the highest
signal frequency. This is because there is less loop gain (the
difference between the open loop gain and the closed loop
gain) available at higher frequencies to reduce harmonic dis-
tortion terms.
These free evaluation boards are shipped automatically when
a device sample request is placed with National Semicon-
ductor.
The DAP (die attach paddle) on the 8-Pin PSOP should be
tied to V
Evaluation Board documentation.
Device
LM7372MA
LM7372MR
−
. It should not be tied to ground. See the respective
Package
16-Pin SOIC
8-Pin PSOP
20004926
Evaluation Board
PN
None
CLC730121