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TLE2682IDW Datasheet(PDF) 1 Page - Texas Instruments

Part # TLE2682IDW
Description  HIGH-SPEED JFET-INPUT DUAL OPERATIONAL AMPLIFIER WITH SWITCHED-CAPACITOR VOLTAGE CONVERTER
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TLE2682IDW Datasheet(HTML) 1 Page - Texas Instruments

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TLE2682
HIGHSPEED JFET INPUT DUAL OPERATIONAL AMPLIFIER
WITH SWITCHEDCAPACITOR VOLTAGE CONVERTER
SLOS127 − JUNE 1993
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
D Single-Supply Operation With Rail-to-Rail
Inputs
D ± 30-mA Min Short-Circuit Output Current
D Wide VCC Range . . . 3.5 V to 15 V
D VOUT Supplies up to 100 mA for External
Loads
D Shutdown Mode
D External 2.5-V Voltage Reference Available
D 40-V/µs Slew Rate Typ
D High Gain-Bandwidth Product . . . 10 MHz
description
The TLE2682 offers the advantages of JFET-input operational amplifiers and rail-to-rail common-mode input
voltage range with the convenience of single-supply operation. By combining a switched-capacitor voltage
converter with a dual operational amplifier in a single package, Texas Instruments now gives circuit designers
new options for conditioning low-level signals in single-supply systems.
The TLE2682 features two high-speed, high-output drive JFET-input operational amplifiers with a switched-
capacitor building block. Using two external capacitors, the switched-capacitor network can be configured as
a voltage inverter generating a negative supply voltage capable of sourcing up to 100 mA. This supply functions
not only as the amplifier’s negative rail but is also available to drive external circuitry. In this configuration, the
amplifier common-mode input voltage range extends from the positive rail to below ground, thus providing true
rail-to-rail inputs from a single supply. Furthermore, the outputs can swing to and below ground while sinking
over 25 mA. This feature was previously unavailable in operational amplifier circuits. The TLE2682 operational
amplifier section has output stages that can drive 20-mA loads to 2.3 V with a 5-V rail. With a 2-mA load, the
output swing extends to 3.9 V.
This amplifier design features a 25-V/
µs minimum slew rate, which results in a high-power bandwidth. Settling
time to 0.1% of a 10-V step (1-k
Ω/100-pF load) is approximately 400 ns. Gain-bandwidth product is typically
10 MHz with an 8-MHz minimum. The TLE2682 offers significant speed and noise advantages at a low 1.5-mA
typical supply current per channel.
The TLE2682 features a shutdown pin (FB/SD), which can be used to disable the switched-capacitor section.
When disabled, the switched-capacitor voltage converter block draws less then 150
µA from the power supply,
VIN.
The switched-capacitor voltage converter block also provides an on-board regulator; with the addition of an
external divider, a well-regulated output voltage is easily obtained. The internal oscillator runs at a nominal
frequency of 25 kHz. This can be synchronized to an external clock signal or can be varied using an external
capacitor. A 2.5-V reference is brought out to VREF for use with the on-board regulator or external circuitry.
Additional filtering can be added to minimize switching noise.
The TLE2682 is characterized for operation over the industrial temperature range of −40
°C to 85°C. This device
is available in a 16-pin wide-body surface-mount package.
AVAILABLE OPTION
PACKAGE
TA
SMALL OUTLINE
(DW)
−40
°C to 85°C
TLE2682IDW
The DW package is available taped and reeled. Add
the suffix R to the device type, (i.e., TLE2682IDWR).
Copyright
 1993, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
2
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8
16
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1 OUT
1 IN −
1 IN +
VCC−
VOUT
VREF
OSC
VIN
VCC+
2 OUT
2 IN −
2 IN +
CAP −
GND
CAP +
FB/SD
DW PACKAGE
(TOP VIEW)


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