OPA358 Datasheet, PDF (7/14 Pages) Burr-Brown (TI) – 3V Single-Supply 80MHz High-Speed Op Amp in SC70

OPA358
www.ti.com
APPLICATIONS INFORMATION
OPERATING VOLTAGE
The OPA358 is fully specified from +2.7V to +3.3V over a
temperature range of −40°C to +85°C. Parameters that
vary significantly with operating voltages or temperature
are shown in the Typical Characteristics.
Power-supply pins should be bypassed with a 100nF
ceramic capacitor.
INPUT VOLTAGE
The input common-mode range of the OPA358 extends
from (V−) − 0.1V to (V+) − 1.0V.
INPUT OVER-VOLTAGE PROTECTION
All OPA358 pins are static-protected with internal ESD
protection diodes connected to the supplies. These diodes
will provide input overdrive protection if the current is
externally limited to 10mA.
RAIL-TO-RAIL OUTPUT
A class AB output stage with common-source transistors
is used to achieve rail-to-rail output. For a 150Ω load, the
output voltage swing is 100mV from the negative rail and
200mV from the positive rail when the load is connected
to V_S/2. For lighter loads, the output swings significantly
SB0S296C − MARCH 2004 − REVISED FEBRUARY 2005
closer to the supply rails while maintaining high open-loop
gain. If the load is connected to ground, the OPA358 output
typically swings to within 5mV of ground. See the typical
characteristic curve, Output Voltage Swing vs Output
Current.
ENABLE/SHUTDOWN
The OPA358 has a shutdown feature that disables the
output and reduces the quiescent current to less than 5µA.
This feature is especially useful for portable video
applications such as digital still cameras (DSCs) and
camera phones, where the equipment is infrequently
connected to a TV or other video device.
The Enable logic input voltage is referenced to the
OPA358 GND pin. A logic level HIGH applied to the enable
pin enables the op amp. A valid logic HIGH is defined as
≥ 1.6V above GND. A valid logic LOW is defined as ≤ 0.8V
above GND. If the Enable pin is not connected, internal
pull-up circuitry will enable the amplifier. Enable pin
voltage levels are tested for a valid logic HIGH threshold
of 1.6V minimum and a valid logic LOW threshold of 0.8V
maximum.
The enable time is 1.5µs and the disable time is only 50ns.
This allows the output of the OPA358 to be multiplexed
onto a common output bus. When disabled, the output
assumes a high-impedance state.
+3V
100nF
V_IN
V_OUT 75Ω
1kΩ
1kΩ
Television
75Ω
Figure 1. Typical Circuit Using the OPA358 in a Gain = 2 Configuration
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