SBOS223G December 2001 – August 2016 OPA690
PRODUCTION DATA.
Achieving optimum performance with a high-frequency amplifier like the OPA690 requires careful attention to board layout parasitics and external component types. Recommendations that optimize performance include:
The OPA690 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. All device pins are protected with internal ESD protection diodes to the power supplies, as shown in Figure 51.
These diodes provide moderate protection to input overdrive voltages above the supplies as well. The protection diodes can typically support 30-mA continuous current. Where higher currents are possible (for example, in systems with ±15-V supply parts driving into the OPA690), current-limiting series resistors must be added into the two inputs. Keep these resistor values as low as possible, because high values degrade both noise performance and frequency response.