Features: 1/2 VI Virtual Ground for Analog Systems
Self-Contained 3-terminal TO-226AA
Package Micropower Operation...170 µA Typ,
VI = 5 V
Wide VI Range...4 V to 40 V
High Output-Current Capability
Source...20 mA Typ
Sink...20 mA Typ
SpecificationsContinuous input voltage, VI................................................................................................40 V
Continuous filter trap voltage ..............................................................................................40 V
Output current, IO±...........................................................................................................80 mA
Duration of short-circuit current at (or below) 25°C (see Note 1)................................. unlimited
Continuous total power dissipation ...............................................See Dissipation Rating Table
Operating free-air temperature range, TA:Csuffix................................................... 0°C to 70°C
I suffix ...............................................40°C to 85°C
M suffix ............................................55°C to 125°C
Storage temperature range, Tstg...................................................................... 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P package............ 260°C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG or LP package .........300°C
DescriptionIn signal-conditioning applications utilizing a single power source, a reference voltage equal to one-half the supply voltage is required for termination of all analog signal grounds. Texas Instruments presents a precision virtual ground whose output voltage is always equal to one-half the input voltage, the TLE2426 "rail splitter."
The unique combination of a high-performance,micropower operational amplifier and a precision- trimmed divider on a single silicon chip results in a precise VO/VI ratio of 0.5 while sinking and sourcing current. The TLE2426 provides a low- impedance output with 20 mA of sink and source capability while drawing less than 280 µAof supply current over the full input range of 4V to 40V. A designer need not pay the price in terms of board space for a conventional signal ground consisting of resistors, capacitors, operational amplifiers, and voltage references. The performance and precision of the TLE2426 is available in an easy-to-use, space saving, 3-terminal LP package. For increased performance, the optional 8-pin packages provide a noise-reduction pin. With the addition of an external capacitor (C NR), peak-to-peak noise is reduced while line ripple rejection is improved.
Initial output tolerance for a single 5-V or 12-V system is better than 1% with 3.6% over the full 40-V input range. Ripple rejection exceeds 12 bits of accuracy. Whether the application is for a data acquisition front end, analog signal termination, or simply a precision voltage reference, the TLE2426 eliminates a major source of system error.
TLE2426 Data Sheet
