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CA3338E Scheda tecnica(PDF) 8 Page - Intersil Corporation |
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CA3338E Scheda tecnica(HTML) 8 Page - Intersil Corporation |
8 / 10 page 8 CA3338, CA3338A Applications The output of the CA3338 can be resistively divided to match a doubly terminated 50 Ω or 75Ω line, although peak-to-peak swings of less than 1V may result. The output magnitude will also vary with the converter’s output impedance. Figure 5 shows such an application. Note that because of the HCT input structure, the CA3338 could be operated up to +7.5V VDD and VREF+ supplies and still accept 0V to 5V CMOS input voltages. If larger voltage swings or better accuracy is desired, a high speed output buffer, such as the HA-5033, HA-2542, or CA3450, can be employed. Figure 6 shows a typical application, with the output capable of driving ±2V into multiple 50 Ω terminated lines. Operating and Handling Considerations HANDLING All inputs and outputs of CMOS devices have a network for electrostatic protection during handling. Recommended handling practices for CMOS devices are described in AN6525. “Guide to Better Handling and Operation of CMOS Integrated Circuits.” OPERATING OPERATING VOLTAGE During operation near the maximum supply voltage limit, care should be taken to avoid or suppress power supply turn-on and turn-off transients, power supply ripple, or ground noise; any of these conditions must not cause the absolute maximum ratings to be exceeded. INPUT SIGNALS To prevent damage to the input protection circuit, input signals should never be greater than VDD nor less than VSS. Input currents must not exceed 20mA even when the power supply is off. UNUSED INPUTS A connection must be provided at every input terminal. All unused input terminals must be connected to either VCC or GND, whichever is appropriate. TABLE 1. OUTPUT VOLTAGE vs INPUT CODE AND VREF VREF+ VREF- STEP SIZE 5.12V 0 0.0200V 5.00V 0 0.0195V 4.608V 0 0.0180V 2.56V -2.56V 0.0200V 2.50V -2.50V 0.0195V Input Code 111111112=FFHEX 111111102=FEHEX 5.1000V 5.0800 4.9805V 4.9610 4.5900V 4.5720 2.5400V 2.5200 2.4805V 2.4610 • • • 100000012=81HEX 100000002=80HEX 011111112=7FHEX 2.5800 2.5600 2.5400 2.5195 2.5000 2.4805 2.3220 2.3040 2.2860 0.0200 0.0000 - 0.0200 0.0195 0.0000 -0.0195 • • • 000000012=01HEX 000000002=00HEX 0.0200 0.0000 0.0195 0.0000 0.0180 0.0000 -2.5400 -2.5600 -2.4805 -2.5000 |
Codice articolo simile - CA3338E |
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Descrizione simile - CA3338E |
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