Datasheet

APPLICATION INFORMATION
OPERATING VOLTAGE
IN-
Pre-OutputDriver
OUT
IN+
V-
V+
OPA211
OPA2211
SBOS377G – OCTOBER 2006 – REVISED MAY 2009 ...................................................................................................................................................... www.ti.com
negative output voltage swing. With the OPA211
The OPA211 and OPA2211 are unity-gain stable,
series, power-supply voltages do not need to be
precision op amps with very low noise. Applications
equal. For example, the positive supply could be set
with noisy or high-impedance power supplies require
to +25V with the negative supply at – 5V or
decoupling capacitors close to the device pins. In
vice-versa.
most cases, 0.1 µ F capacitors are adequate.
Figure 44 shows a simplified schematic of the The common-mode voltage must be maintained
OPA211. This die uses a SiGe bipolar process and within the specified range. In addition, key
contains 180 transistors. parameters are assured over the specified
temperature range, T
A
= – 40 ° C to +125 ° C.
Parameters that vary significantly with operating
voltage or temperature are shown in the Typical
OPA211 series op amps operate from ± 2.25V to
Characteristics .
± 18V supplies while maintaining excellent
performance. The OPA211 series can operate with as
little as +4.5V between the supplies and with up to
+36V between the supplies. However, some
applications do not require equal positive and
Figure 44. OPA211 Simplified Schematic
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Product Folder Link(s): OPA211 OPA2211