TLV2370, TLV2371, TLV2372, TLV2373, TLV2374, TLV2375

FAMILY OF 550 µA/Ch 3MHz RAILTORAIL INPUT/OUTPUT

OPERATIONAL AMPLIFIERS WITH SHUTDOWN

SLOS270D − MARCH 2001 − REVISED JANUARY 2005

16

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POST OFFICE BOX 655303

APPLICATION INFORMATION

circuit layout considerations

To achieve the levels of high performance of the TLV237x, follow proper printed-circuit board design techniques.

A general set of guidelines is given in the following.

components with a low inductive ground connection. However, in the areas of the amplifier inputs and

output, the ground plane can be removed to minimize the stray capacitance.

capacitor on each supply terminal. It may be possible to share the tantalum among several amplifiers

depending on the application, but a 0.1-

µF ceramic capacitor should always be used on the supply terminal

of every amplifier. In addition, the 0.1-

µF capacitor should be placed as close as possible to the supply

terminal. As this distance increases, the inductance in the connecting trace makes the capacitor less

effective. The designer should strive for distances of less than 0.1 inches between the device power

terminals and the ceramic capacitors.

will often lead to stability problems. Surface-mount packages soldered directly to the printed-circuit board

is the best implementation.

inductance has been minimized. To realize this, the circuit layout should be made as compact as possible,

thereby minimizing the length of all trace runs. Particular attention should be paid to the inverting input of

the amplifier. Its length should be kept as short as possible. This helps to minimize stray capacitance at the

input of the amplifier.

performance amplifier circuits for several reasons. First, because of the extremely low lead inductance of

surface-mount components, the problem with stray series inductance is greatly reduced. Second, the small

size of surface-mount components naturally leads to a more compact layout thereby minimizing both stray

inductance and capacitance. If leaded components are used, it is recommended that the lead lengths be

kept as short as possible.

shutdown function

Three members of the TLV237x family (TLV2370/3/5) have a shutdown terminal for conserving battery life in

portable applications. When the shutdown terminal is tied low, the supply current is reduced to 25

µA/channel,

the amplifier is disabled, and the outputs are placed in a high impedance mode. To enable the amplifier, the

shutdown terminal can either be left floating or pulled high. When the shutdown terminal is left floating, care

should be taken to ensure that parasitic leakage current at the shutdown terminal does not inadvertently place

the operational amplifier into shutdown.