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PDF MAX4174EUK-T Data sheet ( Hoja de datos )
| Número de pieza | MAX4174EUK-T | |
| Descripción | SOT23 / Rail-to-Rail / Fixed-Gain GainAmps/Open-Loop Op Amps | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1407; Rev 3; 8/99
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
General Description
The MAX4174/MAX4175/MAX4274/MAX4275 Gain-
Amp™ family combines a low-cost Rail-to-Rail® op amp
with precision internal gain-setting resistors and VCC / 2
biasing. Factory-trimmed on-chip resistors decrease
design size, cost, and layout, and provide 0.1% gain
accuracy. Fixed inverting gains from -0.25V/V to
-100V/V or noninverting gains from +1.25V/V to
+101V/V are available. These devices operate from a
single +2.5V to +5.5V supply and consume only 300µA.
GainAmp amplifiers are optimally compensated for
each gain version, achieving exceptional GBW prod-
ucts up to 23MHz (AV = +25V/V to +101V/V). High-volt-
age fault protection withstands ±17V at either input
without excessive current draw.
Three versions are available in this amplifier family: single/
dual/quad open-loop, unity-gain stable (MAX4281/
MAX4282/MAX4284); single/dual fixed gain (MAX4174/
MAX4274); and single/dual fixed gain plus internal
VCC / 2 bias at the noninverting input (MAX4175/
MAX4275), which simplifies input biasing in single-supply
designs. The input common-mode voltage range of the
open-loop amplifiers extends from 150mV below the
negative supply to within 1.2V of the positive supply.
The outputs can swing rail-to-rail and drive a 1kΩ load
while maintaining excellent DC accuracy. The amplifier
is stable for capacitive loads up to 470pF.
Portable Instruments
Instruments, Terminals,
and Bar-Code Readers
Keyless Entry
Photodiode Preamps
Applications
Smart-Card Readers
Infrared Receivers for
Remote Controls
Low-Side Current-Sense
Amplifiers
Features
o GainAmp Family Provides Internal Precision
Gain-Setting Resistors in SOT23 (MAX4174/5)
o 0.1% Gain Accuracy (RF/RG) (MAX4174/5,
MAX4274/5)
o 54 Standard Gains Available (MAX4174/5,
MAX4274/5)
o Open-Loop Unity-Gain-Stable Op Amps
(MAX4281/2/4)
o Rail-to-Rail Outputs Drive 1kΩ Load
o Internal VCC / 2 Biasing (MAX4175/MAX4275)
o +2.5V to +5.5V Single Supply
o 300µA Supply Current
o Up to 23MHz GBW Product
o Fault-Protected Inputs Withstand ±17V
o Stable with Capacitive Loads Up to 470pF with
No Isolation Resistor
Ordering Information
PART*
TEMP. RANGE
PIN-
TOP
PACKAGE MARK
MAX4174_EUK-T -40°C to +85°C
MAX4175_EUK-T -40°C to +85°C
5 SOT23-5
5 SOT23-5
††
††
Ordering Information continued at end of data sheet.
* Insert the desired gain code (from the Gain Selection Guide)
in the blank to complete the part number.
†† Refer to the Gain Selection Guide for a list of preferred gains
and SOT Top Marks.
Selector Guide appears at end of data sheet.
Pin Configurations
TOP VIEW
MAX4174
OUT 1
VEE 2
+
IN+ 3
5 VCC
RF
RG
4 IN-
SOT23-5
Pin Configurations continued at end of data sheet.
Typical Operating Circuit
0.1µF
IN+
INPUT IN-
0.1µF
+5V
VCC
VCC
RB
MAX4175
0.1µF
RB
VEE
RG
VEE
RF
OUT
†Patent pending
GainAmp is a trademark of Maxim Integrated Products. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
Typical Operating Characteristics (continued)
(VCC = +5V, RL = 100kΩ to VCC / 2, small-signal VOUT = 100mVp-p, large-signal VOUT = 1Vp-p, TA = +25°C, unless otherwise noted.)
4
3
2
1
0
-1
-2
-3
-4
-5
-6
1k
LARGE-SIGNAL GAIN
vs. FREQUENCY
AV = +10V/V
AV = +21V/V
10k 100k 1M
FREQUENCY (Hz)
10M
MAX4174/MAX4175
LARGE-SIGNAL GAIN
vs. FREQUENCY
4
3
2 AV = +25V/V
1
0
-1
-2 AV = +50V/V
-3
-4
-5
-6
1k
10k 100k 1M
FREQUENCY (Hz)
10M
4
3
2
1
0
-1
-2
-3
-4
-5
-6
1k
LARGE-SIGNAL GAIN
vs. FREQUENCY
AV = +51V/V
AV = +100V/V
10k 100k 1M
FREQUENCY (Hz)
10M
4
3
2
1
0
-1
-2
-3
-4
-5
-6
1k
SMALL-SIGNAL GAIN
vs. FREQUENCY
AV = +1.25V/V
AV = +2.25V/V
10k 100k 1M
FREQUENCY (Hz)
10M
4
3
2
1
0
-1
-2
-3
-4
-5
-6
1k
SMALL-SIGNAL GAIN
vs. FREQUENCY
AV = +2.5V/V
AV = +4V/V
10k 100k 1M
FREQUENCY (Hz)
10M
4
3
2
1
0
-1
-2
-3
-4
-5
-6
1k
SMALL-SIGNAL GAIN
vs. FREQUENCY
AV = +5V/V
AV = +9V/V
10k 100k 1M
FREQUENCY (Hz)
10M
4
3
2
1
0
-1
-2
-3
-4
-5
-6
1k
SMALL-SIGNAL GAIN
vs. FREQUENCY
AV = +10V/V
AV = +21V/V
10k 100k 1M
FREQUENCY (Hz)
10M
4
3
2
1
0
-1
-2
-3
-4
-5
-6
1k
SMALL-SIGNAL GAIN
vs. FREQUENCY
AV = +25V/V
AV = +50V/V
10k 100k 1M
FREQUENCY (Hz)
10M
4
3
2
1
0
-1
-2
-3
-4
-5
-6
1k
SMALL-SIGNAL GAIN
vs. FREQUENCY
AV = +51V/V
AV = +100V/V
10k 100k 1M
FREQUENCY (Hz)
10M
_______________________________________________________________________________________ 5
5 Page 
SOT23, Rail-to-Rail, Fixed-Gain
GainAmps/Open-Loop Op Amps
Detailed Description
Maxim’s GainAmp fixed-gain amplifiers combine a low-
cost rail-to-rail op amp with internal gain-setting resis-
tors. Factory-trimmed on-chip resistors provide 0.1%
gain accuracy while decreasing design size, cost, and
layout. Three versions are available in this amplifier
family: single/dual/quad open-loop, unity-gain-stable
devices (MAX4281/MAX4282/MAX4284); single/dual
fixed-gain devices (MAX4174/MAX4274); and single/
dual devices with fixed gain plus internal VCC / 2 bias
at the noninverting input (MAX4175/MAX4275). All
amplifiers feature rail-to-rail outputs and drive a 1kΩ
load while maintaining excellent DC accuracy.
Open-Loop Op Amps
The single/dual/quad MAX4281/MAX4282/MAX4284
are high-performance, open-loop op amps with rail-to-
rail outputs. These devices are compensated for unity-
gain stability, and feature a gain bandwidth (GBW) of
2MHz. The op amps in these ICs feature an input com-
mon-mode range that extends from 150mV below the
negative rail to within 1.2V of the positive rail. These
high performance op amps serve as the core for this
family of GainAmp fixed-gain amplifiers. Although the
-3dB bandwidth will not correspond to that of a fixed-
gain amplifier in higher gain configurations, these
open-loop op-amps can be used to prototype designs.
Internal Gain-Setting Resistors
Maxim’s proprietary laser trimming techniques produce
the necessary RF/RG values (Figure 1), so many gain
offerings are easily available. These GainAmp fixed-gain
amplifiers feature a negative-feedback resistor network
that is laser trimmed to provide a gain-setting feedback
ratio (RF/RG) with 0.1% typical accuracy. The standard
op amp pinouts allow the GainAmp fixed-gain amplifiers
to drop in directly to existing board designs, easily
replacing op-amp-plus-resistor gain blocks.
GainAmp Bandwidth
GainAmp fixed-gain amplifiers feature factory-trimmed
precision resistors to provide fixed inverting gains from
-0.25V/V to -100V/V or noninverting gains from
+1.25V/V to +101V/V. The op-amp core is decompen-
sated strategically over the gain-set options to maxi-
mize bandwidth. Open-loop decompensation increases
GBW product, ensuring that usable bandwidth is main-
tained with increasing closed-loop gains. A GainAmp
with a fixed gain of AV = 100V/V has a -3dB bandwidth
of 230kHz. By comparison, a unity-gain-stable op amp
configured for AV = 100V/V would yield a -3dB band-
width of only 20kHz (Figure 2). Decompensation is per-
formed at five intermediate gain sets, as shown in the
Gain Selection Guide. Low gain decompensation great-
ly increases usable bandwidth, while decompensation
above gains of +25V/V offers diminished returns.
VCC / 2 Internal Bias
The MAX4175/MAX4275 GainAmp fixed-gain amplifiers
with the VCC / 2 bias option are identical to standard
GainAmp fixed-gain amplifiers, with the added feature
of VCC / 2 internal bias at the noninverting inputs. Two
150kΩ resistors form a voltage-divider for self-biasing
the noninverting input, eliminating external bias resis-
tors for AC-coupled applications, and allowing maxi-
mum signal swing at the op amp’s rail-to-rail output for
single-supply systems (see Typical Operating Circuit).
For DC-coupled applications, use the MAX4174/
MAX4274.
High-Voltage (±17V) Input Fault Protection
The MAX4174/MAX4175/MAX4274/MAX4275 include
±17V input fault protection. For normal operation, see
the input voltage range specification in the Electrical
Characteristics. Overdriven inputs up to ±17V will not
VCC
RG
IN-
RF
AV
=
-RF
RG
AV = 1 +
RF
RG
VEE
OUT
IN+
Figure 1. Internal Gain-Setting Resistors
60
MAX4281, AV = 100
2MHz GBW
50 MAX4174,
AV = 100
40 23MHz GBW
-3dB
30 20kHz
230kHz
20
10
0
10 100
1k 10k 100k 1M
FREQUENCY (Hz)
10M
Figure 2. Gain-Bandwidth Comparison
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MAX4174EUK-T.PDF ] | |
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