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ISL28266 Scheda tecnica(PDF) 9 Page - Intersil Corporation

Il numero della parte ISL28266
Spiegazioni elettronici  39uA Micropower Single and Dual Rail-to-Rail Input-Output Low Input Bias Current (RRIO) Op Amps
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Produttore elettronici  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL28266 Scheda tecnica(HTML) 9 Page - Intersil Corporation

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9
FN6155.2
February 27, 2007
Applications Information
Introduction
The ISL28166 is a single BiMOS rail-to-rail input, output
(RRIO) operational amplifier with an enable feature. The
ISL28266 is a dual version without the enable feature. Both
devices are designed to operate from single supply (2.4V to
5.0V) or dual supplies (±1.2V to ±2.5V) while drawing only
39
μA of supply current per amplifier. This combination of low
power and precision performance makes this device suitable
for a variety of low power applications including battery
powered systems.
Rail-to-Rail Input/Output
These devices feature bipolar inputs which have an input
common mode range that extends to the rails, and CMOS
outputs that can typically swing to within about 4mV of the
supply rails with a 100k
Ω load. The NMOS sinks current to
swing the output in the negative direction. The PMOS sources
current to swing the output in the positive direction.
Input Protection
All input terminals have internal ESD protection diodes to
both positive and negative supply rails, limiting the input
voltage to within one diode beyond the supply rails. They
also contain back-to-back diodes across the input terminals.
For applications where the input differential voltage is
expected to exceed 0.5V, external series resistors must be
used to ensure the input currents never exceed 5mA (Figure
35).
Enable/Disable Feature
The ISL28166 offers an EN pin that disables the device
when pulled up to at least 2.0V. In the disabled state (output
in a high impedance state), the part consumes typically
10µA. By disabling the part, multiple ISL28166 parts can be
connected together as a MUX. In this configuration, the
outputs are tied together in parallel and a channel can be
Pin Descriptions
ISL28166
(6 Ld SOT-23)
ISL28166
(8 Ld SO)
ISL28266
(8 Ld SO)
(8 Ld MSOP)
PIN NAME
FUNCTION
EQUIVALENT CIRCUIT
1, 5
NC
Not connected
42
2 (A)
6 (B)
IN-
Inverting input
Circuit 1
33
3 (A)
5 (B)
IN+
Non-inverting
input
(See circuit 1)
2
4
4
V-
Negative supply
16
1 (A)
7 (B)
OUT
Output
Circuit 2
6
7
8
V+
Positive supply
5
8
ENABLE
Chip enable
Circuit 3
IN-
V+
V-
IN+
V+
V-
OUT
V+
V-
CE
FIGURE 35. INPUT CURRENT LIMITING
-
+
RIN
RL
VIN
VOUT
ISL28166, ISL28266


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