MAX4195 Maxim, MAX4195 Datasheet

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MAX4195

Manufacturer Part Number
MAX4195
Description
The MAX4194 is a variable-gain precision instrumentation amplifier that combines Rail-to-Rail; single-supply operation, outstanding precision specifications, and a high gain bandwidth
Manufacturer
Maxim
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
MAX4195ESA
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX4195ESA+T
Manufacturer:
MAXIM
Quantity:
10 155
The MAX4194 is a variable-gain precision instrumenta-
tion amplifier that combines Rail-to-Rail
operation, outstanding precision specifications, and a
high gain bandwidth. This amplifier is also offered in
three fixed-gain versions: the MAX4195 (G = +1V/V), the
MAX4196 (G = +10V/V), and the MAX4197 (G =
+100V/V). The fixed-gain instrumentation amplifiers fea-
ture a shutdown function that reduces the quiescent
current to 8µA. A traditional three operational amplifier
configuration is used to achieve maximum DC precision.
The MAX4194–MAX4197 have rail-to-rail outputs and
inputs that can swing to 200mV below the negative rail
and to within 1.1V of the positive rail. All parts draw only
93µA and operate from a single +2.7V to +7.5V supply
or from dual ±1.35V to ±3.75V supplies. These amplifiers
are offered in 8-pin SO packages and are specified for
the extended temperature range (-40°C to +85°C).
See the MAX4198/MAX4199 data sheet for single-supply,
precision differential amplifiers.
19-1468; Rev 1; 6/03
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
TOP VIEW
Medical Equipment
Thermocouple Amplifier
4–20mA Loop Transmitters
Data-Acquisition Systems
Battery-Powered/Portable Equipment
Transducer Interface
Bridge Amplifier
RG-
IN+
V
IN-
EE
________________________________________________________________ Maxim Integrated Products
1
2
4
3
Micropower, Single-Supply, Rail-to-Rail,
General Description
MAX4194
SO
Precision Instrumentation Amplifiers
6
8
7
5
Applications
RG+
V
OUT
REF
CC
®
single-supply
o +2.7V Single-Supply Operation
o Low Power Consumption
o High Common-Mode Rejection: 115dB (G = +10V/V)
o Input Common-Mode Range Extends 200mV
o Low 50µV Input Offset Voltage (G ≥ +100V/V)
o Low ±0.01% Gain Error (G = +1V/V)
o 250kHz -3dB Bandwidth (G = +1V/V, MAX4194)
o Rail-to-Rail Outputs
MAX4194ESA
MAX4195ESA
MAX4196ESA
MAX4197ESA
MAX4194
MAX4195
MAX4196
MAX4197
Below GND
PART
93µA Supply Current
8µA Shutdown Current
PART
(MAX4195/MAX4196/MAX4197)
SHUTDOWN
REF
IN+
V
IN-
EE
1
2
4
3
Yes
Yes
Yes
No
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
MAX4195
MAX4196
MAX4197
SO
Pin Configurations
GAIN (V/V)
Variable
+100
+10
+1
Selector Guide
6
8
7
5
SHDN
V
OUT
FB
CC
8 SO
8 SO
8 SO
8 SO
PIN-PACKAGE
95 (G = +1V/V)
Features
CMRR (dB)
115
115
95
1

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MAX4195 Summary of contents

Page 1

... Rail-to-Rail operation, outstanding precision specifications, and a high gain bandwidth. This amplifier is also offered in three fixed-gain versions: the MAX4195 (G = +1V/V), the MAX4196 (G = +10V/V), and the MAX4197 (G = +100V/V). The fixed-gain instrumentation amplifiers fea- ture a shutdown function that reduces the quiescent current to 8µ ...

Page 2

... SO (derate 5.9mW/°C above +70°C).................. 471mW Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

Page 3

Micropower, Single-Supply, Rail-to-Rail, Precision Instrumentation Amplifiers ELECTRICAL CHARACTERISTICS (continued +5V 0V 25kΩ tied +25°C.) A PARAMETER SYMBOL DC Common-Mode CMR DC Rejection AC Common-Mode CMR AC Rejection ...

Page 4

... 1000V / 4194 +25° / +10V R = 5kΩ +100V/V + 0.2V ≤ OUT ≤ 0. 1000V / 4194 MAX4194/MAX4195 +1V/V MAX4196/MAX4197 MAX4194 + 0.1V ≤ V ≤ 0.1V, EE OUT / +1V/V, +10V/ +100V/V, +1000V/V MAX4194 G = +1V/V MAX4195 MAX4194 ≤ 0. +10V ...

Page 5

... MAX4197 only OUT G = +1V/V, 0.1 +3.5V OUT 2. 1.5V, SHDN +100V/V, 0.1 +3.5V OUT Typical Operating Characteristics / +25°C, unless otherwise noted MAX4195/MAX4196/MAX4197 SMALL-SIGNAL GAIN vs. FREQUENCY +1V +100V +10V 100 1k 10k 100k FREQUENCY (Hz) , unless otherwise noted. Typical values are at ...

Page 6

Micropower, Single-Supply, Rail-to-Rail, Precision Instrumentation Amplifiers (V = +5V 25kΩ tied MAX4194 LARGE-SIGNAL PULSE RESPONSE (GAIN = +1V/V) MAX4194 toc04 INPUT (500mV/div) OUTPUT (500mV/div) 20µs/div MAX4194 SMALL-SIGNAL PULSE RESPONSE (GAIN ...

Page 7

... +100V/V 10k 100k MAX4195/MAX4196 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 1.000 0.100 0.010 MAX4196 G = +10V/V 0.001 G = +1V/V MAX4195 100 1k 10k FREQUENCY (Hz) SUPPLY CURRENT vs. TEMPERATURE +1000V +100V +1V/V, +10V -40 -15 ...

Page 8

... Inverting Input Noninverting Input Negative Supply Voltage Feedback. Connects to OUT. Amplifier Output Positive Supply Voltage Shutdown Control INPUT OFFSET VOLTAGE vs. TEMPERATURE 100 75 MAX4197 MAX4196 -25 MAX4194 MAX4194 (G = +100V/V, - +10V/ +1000V/V) -75 MAX4195 -40 - TEMPERATURE (°C) Pin Description FUNCTION FUNCTION ...

Page 9

... IN- 25kΩ RG- MAX4194 RG+ 25kΩ IN+ 25kΩ Figure 1. MAX4194 Simplified Block Diagram 25kΩ IN- 25kΩ MAX4195 R G MAX4196 25kΩ MAX4197 SHDN IN+ 25kΩ Figure 2. MAX4195/MAX4196/MAX4197 Simplified Block Diagram V IN IN+ IN ...

Page 10

... With an output load of 5kΩ tied to V put voltage swings within 100mV of the rails. Shutdown Mode The MAX4195–MAX4197 feature a low-power shutdown mode. When the shutdown pin (SHDN) is pulled low, the internal amplifiers are switched off and the supply current drops to 8µA typically (Figures 5a, 5b, and 5c). ...

Page 11

... MAX4196 IN+ OUT IN- AC-COUPLED (V = 200mV, DIFF G = +10V/V) (500mV/div) (MAX4194) = ∞ (INTERNAL, MAX4195) SHDN (5V/div) Figure 6a. Using a Resistor to Isolate a Capacitive Load from the Instrumentation Amplifier (G = +1V/V) MAX4197 OUT AC-COUPLED (V = 20mV, DIFF G = +100V/V) (500mV/div) SHDN (5V/div) Figure 6b. Small-Signal Pulse Response with Excessive ...

Page 12

Micropower, Single-Supply, Rail-to-Rail, Precision Instrumentation Amplifiers Power-Supply Bypassing and Layout Good layout technique optimizes performance by decreasing the amount of stray capacitance at the instrumentation amplifier’s gain-setting pins. Excess capacitance will produce peaking in the amplifier’s fre- quency response. To ...

Page 13

... A1 FRONT VIEW Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 13 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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