MAX4294 Maxim, MAX4294 Datasheet

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MAX4294

Manufacturer Part Number
MAX4294
Description
The MAX4291/MAX4292/MAX4294 family of micropower operational amplifiers operates from a 1
Manufacturer
Maxim
Datasheet

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Price
Part Number:
MAX4294ESD
Manufacturer:
MAXIM/美信
Quantity:
20 000
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MAX4294ESD+T
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Quantity:
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Part Number:
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Quantity:
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The MAX4291/MAX4292/MAX4294 family of micropow-
er operational amplifiers operates from a 1.8V to 5.5V
single supply or ±0.9V to ±2.75V dual supplies and has
Rail-to-Rail
provide a 500kHz gain-bandwidth product and 120dB
open-loop voltage gain while using only 100µA of sup-
ply current per amplifier. The combination of low input
offset voltage (±200µV) and high open-loop gain makes
them ideal for low-power/low-voltage, high-precision
portable applications.
The MAX4291/MAX4292/MAX4294 have an input com-
mon-mode range that extends to each supply rail, and
their outputs swing to within 46mV of the rails with a 2k
load. Although the minimum operating voltage is speci-
fied at 1.8V, these devices typically operate down to
1.5V. The combination of ultra-low-voltage operation, rail-
to-rail inputs/output, and low-power consumption makes
these devices ideal for any portable/two-cell battery-pow-
ered system.
The single MAX4291 is offered in an ultra-small 5-pin
SC70 package. The dual MAX4292 is offered in a
space-saving 8-bump, 1.5mm X 1.5mm footprint, ultra
chip-scale package (UCSP™).
19-1612; Rev 3; 4/02
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
(BUMPS ON BOTTOM)
Pin Configurations continued at end of data sheet.
2-Cell Battery-Operated Systems
Portable Electronic Equipment
Battery-Powered Instrumentation
Digital Scales
Strain Gauges
Sensor Amplifiers
Cellular Phones
®
input/output capabilities. These amplifiers
________________________________________________________________ Maxim Integrated Products
OUTA
INA-
INA+
General Description
Pin Configurations
MAX4292
UCSP
V
V
CC
EE
OUTB
Applications
INB-
INB+
Ultra-Small, 1.8V, µPower,
Rail-to-Rail I/O Op Amps
o Ultra-Low Voltage Operation—Guaranteed Down
o 100µA Supply Current per Amplifier
o 500kHz Gain-Bandwidth Product
o 120dB Open-Loop Voltage Gain (R
o 0.017% Total Harmonic Distortion Plus Noise
o Rail-to-Rail Input Common-Mode Range
o Rail-to-Rail Output Drives 2k Load
o No Phase Reversal for Overdriven Inputs
o Unity-Gain Stable for Capacitive Loads up to 100pF
o 200µV Input Offset Voltage (MAX4292/MAX4294)
o Single in Small 5-Pin SC70
o Available in Ultra-Small Packages:
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
UCSP is a trademark of Maxim Integrated Products, Inc.
MAX4291EXK-T
MAX4291EUK-T
MAX4292EBL-T*
MAX4292EUA
MAX4292ESA
MAX4294ESD
MAX4294EUD
*UCSP reliability is integrally linked to the user’s assembly
methods, circuit board material, and environment. Refer to the
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.
MAX4291
MAX4292
MAX4294
to 1.8V
(THD + N) at 1kHz
PART
PART
5-Pin SC70 (MAX4291)
8-Bump UCSP (MAX4292)
AMPLIFIERS
-40 C to +85 C
-40 C to +85 C
-40 C to +85 C
-40 C to +85 C
-40 C to +85 C
-40 C to +85 C
-40 C to +85 C
TEMP RANGE
Ordering Information
1
2
4
Selector Guide
PIN-PACKAGE
5-pin SC70/SOT23
8-pin µMAX/SO/UCSP
14-pin SO/TSSOP
PIN-
PACKAGE
5 SC70-5
5 SOT23-5
8 UCSP-8
8 µMAX
8 SO
14 SO
14 TSSOP
L
= 100k )
Features
MARK
ADML
TOP
AAD
AAJ
1

Related parts for MAX4294

MAX4294 Summary of contents

Page 1

... The MAX4291/MAX4292/MAX4294 have an input com- mon-mode range that extends to each supply rail, and their outputs swing to within 46mV of the rails with a 2k load. Although the minimum operating voltage is speci- fied at 1 ...

Page 2

... < 10mV IN+ IN- Inferred from CMRR test Tested for MAX4291 1.8V; MAX4292/MAX4294 V = 1.8V CC Tested for MAX4291 5.0V, MAX4292/MAX4294 V = 5. +25°C, unless otherwise noted MIN TYP MAX UNITS 1.8 5.5 V 100 210 µA 100 255 ±400 ±2500 µV ±200 ±1200 ±15 ± ...

Page 3

... 100k to V Specified Sourcing or sinking Specified 10kHz (MAX4292/MAX4294 only) ISO 10kHz 10kHz 1V/V, no sustained oscillations VCL = V / 100k connected to V OUT CC L CONDITIONS Inferred from PSRR test 1.8V ...

Page 4

... CONDITIONS 5.0V 5. 5.0V 5. Inferred from CMRR test Tested for MAX4291 0 V 1.8V 1.8V MAX4292/MAX4294 CC Tested for MAX4291 0 V 5.0V, CM MAX4292/MAX4294 100k , L 0.02V V V OUT 1. 0. OUT 100k , L 0.02V V V OUT 5.0V ...

Page 5

OUT CC SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE 160 150 140 130 V = 5.5V CC 120 110 100 1. ...

Page 6

... CC L 130 120 110 100 100 150 200 250 300 350 400 450 500 V (mV) OL MAX4292/MAX4294 CROSSTALK vs. FREQUENCY 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 0.01 0 FREQUENCY (kHz) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 180 144 ...

Page 7

OUT CC LOAD RESISTOR vs. CAPACITIVE LOAD 100 10% OVERSHOOT A = 1V/V V (NONINVERTING CONFIGURATION 5. 2.4V CC ...

Page 8

... The crossover region of these two pairs occurs halfway between V and V CC voltage is typically ±200µV (MAX4292/MAX4294). Low operating supply voltage, low supply current, rail-to-rail common-mode input range, and rail-to-rail outputs make this family of operational amplifiers (op amps) an excellent choice for precision or general-purpose, low- voltage, battery-powered systems ...

Page 9

... A high power-supply rejection ratio of 100dB allows the amplifiers to be powered directly off a decaying battery voltage, simplifying design and extending battery life. The MAX4291/MAX4292/MAX4294 are ideally suited for use with most battery-powered systems. Table 1 lists a MAX4291 CAPACITY, AA SIZE OPERATING TIME IN ...

Page 10

... Figures 6a and 6b show the typical current source and sink capabilities of the MAX4291/MAX4292/MAX4294 family as a function of supply voltage and ambient tem- perature. The contours on the graph depict the output current value, based on driving the output voltage to within 50mV, 100mV, and 200mV of either power-sup- ply rail ...

Page 11

... Using the MAX4291/MAX4292/MAX4294 Although optimized for use as operational amplifiers, the MAX4291/MAX4292/MAX4294 can also be used as load resistor rail-to-rail I/O comparators. Typical propagation delay depends on the input overdrive voltage, as shown in Figure 8. External hysteresis can be used to minimize the risk of output oscillation. The positive feedback cir- cuit, shown in Figure 9, causes the input threshold to change when the output voltage changes state ...

Page 12

... CC Using the MAX4291/MAX4292/MAX4294 as Low-Power Current Monitors The MAX4291/MAX4292/MAX4294 are ideal for appli- cations powered from a two-cell battery stack. Figure 11 shows an application circuit in which the MAX4291 is used for monitoring the current of a two-cell battery stack. In this circuit, a current load is applied, and the voltage drop at the battery terminal is sensed ...

Page 13

For a 1V output and a current load of 50mA, the choice of resistors can 100k , and UCSP Information Design the layout for the ...

Page 14

... Ultra-Small, 1.8V, µPower, Rail-to-Rail I/O Op Amps TOP VIEW IN+ 1 MAX4291 IN- SC70/SOT23 Chip Information MAX4291 TRANSISTOR COUNT: 149 MAX4292 TRANSISTOR COUNT: 356 MAX4294 TRANSISTOR COUNT: 747 PROCESS: BiCMOS 14 ______________________________________________________________________________________ Pin Configurations (continued) V OUTA OUTB INA- MAX4292 3 6 INB- ...

Page 15

... For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Ultra-Small, 1.8V, µPower, Rail-to-Rail I/O Op Amps Package Information 15 ...

Page 16

... E ÿ 0.50±0.1 0.6±0.1 1 0.6±0.1 D TOP VIEW FRONT VIEW Note: The MAX4292 does not have an exposed pad. Note: The MAX4294 does not have an exposed pad. 16 ______________________________________________________________________________________ Package Information (continued INCHES DIM MIN 0.002 A2 0.030 b 0 ...

Page 17

... For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Ultra-Small, 1.8V, µPower, Rail-to-Rail I/O Op Amps Package Information (continued) 17 ...

Page 18

... For the latest package outline information www.maxim-ic.com/packages.) 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. ...

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