Figure 5-21 shows a circuit that permits one particular portion of a signal to be amplified (or examined) with all other portions rejected. Figure 5-22 shows what happens when the output of a triangle-wave generator (trace A) is applied to the circuit. Setting the bias level just below the triangle peak permits high-gain, detailed observation of the turnaround at the peak. Switching residue in the generator output is observable in trace B. Appropriate variations in voltage-source setting will permit more of the triangle slopes to be observed, (with a loss of resolution because of scope-overload). Similarly, increasing the A2 gain allows more amplitude detail, while placing restrictions on how much of the waveform can be displayed. In effect, this circuit performs the same functions as differential plug-in units for scopes. The circuit output is accurate and settled to 0.1% about 100 ns after entering the linear region. LINEAR TECHNOLOGY, APPLICATION NOTE 47, P. 39, 40.
The LT®1019 is a third generation bandgap voltage reference utilizing thin film technology and a greatly improved curvature correction technique. Wafer level trimming of both reference and output voltage combines to produce units with high yields to very low TC and tight initial tolerance of output voltage.
The LT1019 can both sink and source up to 10mA and can be used in either the series or shunt mode. This allows the reference to be used for both positive and negative output voltages without external components. Minimum input/ output voltage is less than 1V in the series mode, providing improved tolerance of low line conditions.
The LT1019 is available in four voltages: 2.5V, 4.5V, 5V and 10V. It is a direct replacement for most bandgap references presently available including AD580, AD581, REF-01, REF-02, MC1400, MC1404 and LM168.
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Negative Shunt ReferencesA/D and D/A ConvertersPrecision Regulators Constant Current SourcesV/F Converters Bridge Excitation
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Input Voltage ..........................................................40V
Output Voltage (Note 2)
LT1019-5, LT1019-10 .......................................... 16V
LT1019-2.5, LT1019-4.5 ........................................ 7V
Output Short-Circuit Duration (Note 2)
VIN < 20V .................................................... Indefinite
20V VIN 35V .............................................. 10 sec
Specified Temperature Range
Commercial ............................................. 0°C to 70°C
Industrial ............................................ 40°C to 85°C
Military .............................................. 55°C to 125°C
Trim Pin Voltage .................................................... ±30V
Temp Pin Voltage .......................................................5V
Storage Temperature Range (Note 11) 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
Post a Buying Lead
Required Field 
