TLV2760, TLV2761, TLV2762, TLV2763, TLV2764, TLV2765

FAMILY OF 1.8 V MICROPOWER RAIL-TO-RAIL INPUT/OUTPUT

OPERATIONAL AMPLIFIERS WITH SHUT DOWN

SLOS326D – JUNE 2000 – REVISED FEBRUARY 2001

16

POST OFFICE BOX 655303

APPLICATION INFORMATION

circuit layout considerations (continued)

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 will help 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 TLV276x family (TLV2760/3/5) have a shutdown terminal for conserving battery life in

portable applications. When the shutdown terminal is pulled low, the supply current is reduced to 10 nA/channel,

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

shutdown terminal must be pulled high. The shutdown terminal should never be left floating. If the shutdown

feature is not desired, directly tie the shutdown terminal to the positive rail. The shutdown terminal threshold

is always referenced to the GND terminal of the device. Therefore, when operating the device with split supply

voltages (e.g.

±1.8 V), the shutdown terminal needs to be pulled to the negative rail, not the system ground,

to disable the operational amplifier.

The amplifier is powered with a single 2.4-V supply and configured as a noninverting configuration with a unity

gain. Turnon and turnoff times are defined as the interval between application of the logic signal to the shutdown

pin and the point at which the supply current has reached half its final value. The times for the single, dual, and

quad are listed in the data tables.

general power dissipation considerations

For a given

P

D +

T

MAX

–T

A

q

JA

Where:

= Maximum power dissipation of TLV276x IC (watts)

= Free-ambient air temperature (

°C)