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OPA843 Fiches technique(PDF) 19 Page - Burr-Brown (TI) |
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OPA843 Fiches technique(HTML) 19 Page - Burr-Brown (TI) |
19 / 22 page OPA843 19 SBOS268A www.ti.com INPUT AND ESD PROTECTION The OPA843 is built using a very high-speed complementary bipolar process. The internal junction breakdown voltages are relatively low for these very small geometry devices. These breakdowns are reflected in the Absolute Maximum Ratings table. All device pins are protected with internal ESD protec- tion diodes to the power supplies, as shown in Figure 16. These diodes provide moderate protection to input overdrive voltages above the supplies as well. The protection diodes can typically support 30mA continuous current. Where higher currents are possible (e.g., in systems with ±15V supply parts driving into the OPA843), current-limiting series resistors should be added into the two inputs. Keep these resistor values as low as possible since high values degrade both noise performance and frequency response. Figure 17 shows one example of an overdrive protection circuit added to a G = +5V/V design. External Pin Internal Cicuitry +V CC –V CC OPA843 +5V –5V 50 Ω 50 Ω Power-supply decoupling not shown. 125 Ω D1 D2 R G 126 Ω 50 Ω R F 505 Ω V O D1 = D2 IN5911 (or equivalent) 50 Ω Source FIGURE 17. Gain of +5 with Input Protection. FIGURE 16. Internal ESD Protection. |
Numéro de pièce similaire - OPA843 |
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Description similaire - OPA843 |
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