MAX4240 Maxim, MAX4240 Datasheet

no-image

MAX4240

Manufacturer Part Number
MAX4240
Description
The MAX4240–MAX4244 family of micropower op amps operate from a single +1
Manufacturer
Maxim
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX4240EUK
Manufacturer:
MAXIM
Quantity:
2 477
Part Number:
MAX4240EUK+
Manufacturer:
TST
Quantity:
5 000
Part Number:
MAX4240EUK+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX4240EUK-T
Manufacturer:
MAXIM/美信
Quantity:
20 000
Beyond-the-Rails is a trademark and µMAX is a registered
trademark of Maxim Integrated Products, Inc.
19-1343; Rev 3; 9/06
The MAX4240–MAX4244 family of micropower op amps
operate from a single +1.8V to +5.5V supply or dual
±0.9V to ±2.75V supplies and have Beyond-the-Rails™
inputs and rail-to-rail output capabilities. These ampli-
fiers provide a 90kHz gain-bandwidth product while
using only 10µA of supply current per amplifier. The
MAX4241/MAX4243 have a low-power shutdown mode
that reduces supply current to less than 1µA and forces
the output into a high-impedance state. Although the
minimum operating voltage is specified at +1.8V, these
devices typically operate down to +1.5V. The combina-
tion of ultra-low-voltage operation, beyond-the-rails
inputs, rail-to-rail outputs, and ultra-low power con-
sumption makes these devices ideal for any portable/
two-cell battery-powered system.
These amplifiers have an input common-mode range
that extends 200mV beyond each rail, and their out-
puts typically swing to within 9mV of the rails with a
100kΩ load. Beyond-the-rails input and rail-to-rail out-
put characteristics allow the full power-supply voltage
to be used for signal range. The combination of low
input offset voltage, low input bias current, and high
open-loop gain makes them suitable for low-power/low-
voltage precision applications.
The MAX4240 is offered in a space-saving 5-pin
SOT23 package. All specifications are guaranteed
over the -40°C to +85°C extended temperature range.
Two-Cell Battery-
Powered Systems
Portable/Battery-Powered
Electronic Equipment
Digital Scales
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.
MAX4240
MAX4241
MAX4242
MAX4243
MAX4244
PART
NO. OF
AMPS
1
1
2
2
4
________________________________________________________________ Maxim Integrated Products
SHUTDOWN
General Description
Single/Dual/Quad, +1.8V/10µA, SOT23,
Yes
Yes
Strain Gauges
Sensor Amplifiers
Cellular Phones
Notebook Computers
PDAs
Selector Guide
Applications
5-pin SOT23
8-pin µMAX/SO
8-pin µMAX/SO
10-pin µMAX,
14-pin SO
14-pin SO
PIN-PACKAGE
Beyond-the-Rails Op Amps
♦ Ultra-Low-Voltage Operation:
♦ Ultra-Low Power Consumption:
♦ Beyond-the-Rails Input Common-Mode Range
♦ Outputs Swing Rail-to-Rail
♦ No Phase Reversal for Overdriven Inputs
♦ 200µV Input Offset Voltage
♦ Unity-Gain Stable for Capacitive Loads up to 200pF
♦ 90kHz Gain-Bandwidth Product
♦ Available in Space-Saving 5-Pin SOT23 and
MAX4240EUK-T -40°C to +85°C
MAX4241EUA
MAX4241ESA
MAX4242EUA
MAX4242ESA
MAX4243EUB
MAX4243ESD
MAX4244ESD
Pin Configurations continued at end of data sheet.
8-Pin µMAX
TOP VIEW
Guaranteed Down to +1.8V
Typical Operation to +1.5V
10µA Supply Current per Amplifier
1µA Shutdown Mode (MAX4241/MAX4243)
Up to 200,000 Hours Operation from Two AA
Alkaline Cells
PART
®
OUT
Packages
V
IN+
TEMP RANGE
-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
EE
1
2
3
Ordering Information
SOT23-5
MAX4240
Pin Configurations
PIN-
PACKAGE
5 SOT23-5
8 µMAX
8 SO
8 µMAX
8 SO
10 µMAX
14 SO
14 SO
4
5
V
IN-
CC
Features
MARK
ACCS
TOP
1

Related parts for MAX4240

MAX4240 Summary of contents

Page 1

... The MAX4240 is offered in a space-saving 5-pin SOT23 package. All specifications are guaranteed over the -40°C to +85°C extended temperature range. Two-Cell Battery- ...

Page 2

... MAX4242ESA/MAX4243ESD/ - 0.2V) ≤ V ≤ MAX4244ESD + 0.2V) CC MAX4240EUK/MAX424_EUA/ MAX4243EUB < 1.0V IN+ IN > 2.5V IN+ IN- MAX4241ESA MAX4242ESA/MAX4243ESD/ = 1.8V CC MAX4244ESD MAX4240EUK/MAX424_EUA/ MAX4243EUB MAX4241ESA MAX4242ESA/MAX4243ESD/ MAX4244ESD = 5.0V CC MAX4240EUK/MAX424_EUA/ MAX4243EUB / 2, SHDN = +25°C, unless MIN TYP MAX UNITS 1.8 5 µ 1.0 1.5 µA 2.0 3.0 ±0.20 ±0.75 ±0.20 ±0.88 mV ±0.25 ±1.40 ± ...

Page 3

... Isolation (Note 6) Gain-Bandwidth GBW Product Phase Margin m Gain Margin G m Slew Rate SR _______________________________________________________________________________________ Beyond-the-Rails Op Amps = 100kΩ tied to V OUT CC L CONDITIONS MAX4241ESA MAX4242ESA/MAX4243ESD/ MAX4244ESD 1.8V ≤ V ≤ 5.5V CC MAX4240EUK/MAX424_EUA/ MAX4243EUB 0.2V) ≤ V ≤ EE OUT (V - 0.2V 5. 1.8V CC Specified 5. ...

Page 4

... R = 100kΩ tied to V OUT CONDITIONS 5.0V CC MAX4241ESA MAX4242ESA/MAX4243ESD/ - 0.2V) ≤ V ≤ MAX4244ESD + 0.2V) CC MAX4240EUK/MAX424_EUA/ MAX4243EUB / 2, SHDN = +25°C, unless MIN TYP MAX 70 0.05 200 50 150 200 3 = +1V/V 0. SHDN = unless oth MIN MAX ...

Page 5

... 100kΩ tied to V OUT CC L CONDITIONS MAX4241ESA MAX4242ESA/MAX4243ESD/ MAX4244ESD V = 1.8V CC MAX4240EUK/MAX424_EUA/ MAX4243EUB MAX4241ESA MAX4242ESA/MAX4243ESD/ MAX4244ESD V = 5.0V CC MAX4240EUK/MAX424_EUA/ MAX4243EUB MAX4241ESA MAX4242ESA/MAX4243ESD/ MAX4244ESD 1.8V ≤ V ≤ 5.5V CC MAX4240EUK/MAX424_EUA/ MAX4243EUB 0.2V) ≤ V ≤ OUT (V - 0.2V 5. 1.8V CC Specified 5. 1.8V ...

Page 6

... SHDN = Current (Note 2) Note 1: The MAX4240EUK, MAX4241EUA, MAX4242EUA, and MAX4243EUB specifications are 100% tested at T temperature limits are guaranteed by design. Note 2: Shutdown mode applies to the MAX4241/MAX4243 only. Note 3: Input bias current and input offset current are tested with V Note 4: Tested over the specified input common-mode range. ...

Page 7

Single/Dual/Quad, +1.8V/10µA, SOT23, ____________________________________Typical Operating Characteristics (continued +5.0V INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE (V = 5.5V +5.5V CC 2.5 0 ...

Page 8

... FREQUENCY (Hz) VOLTAGE NOISE vs. FREQUENCY 1000 100 10 0.1 1 FREQUENCY (Hz) SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING) 100mV IN 0V 50mV/div 100mV OUT 0V 10μs/div MAX4240/44-17 180 144 108 -36 -72 -108 -144 -180 100k 10 MAX4240/44-23 100mV 0V 100mV 0V ...

Page 9

Single/Dual/Quad, +1.8V/10µA, SOT23 +5.0V /2, V SHDN _______________________________________________________________________________________ Beyond-the-Rails Op Amps Typical Operating Characteristics (continued 100kΩ / +25°C unless ...

Page 10

... Reducing input capacitance or placing a small capacitor across the feedback resistor improves response in this case. The MAX4240–MAX4244 family’s inputs are protected from large differential input voltages by internal 2.2kΩ series resistors and back-to-back triple-diode stacks across the inputs (Figure 2). For differential input volt- ages (much less than 1.8V), input resistance is typically 45MΩ ...

Page 11

... The MAX4240–MAX4244 output stage can drive 10kΩ load and still swing to within 40mV of the rails. Figure 3 shows the output voltage swing of a MAX4240 configured as a unity-gain buffer, powered from a single +2V supply voltage. The output for this setup typically ...

Page 12

... Figures 7a and 7b show the typical current source and sink capability of the MAX4240–MAX4244 family as a function of supply voltage and ambient temperature. The contours on the graph depict the output current 12 ...

Page 13

... (+0.9V in this case). CC Driving Capacitive Loads The MAX4240–MAX4244 are unity-gain stable for loads up to 200pF (see Load Resistor vs. Capacitive Load graph in Typical Operating Characteristics ). Applica- tions that require greater capacitive drive capability should use an isolation resistor between the output and the capacitive load (Figure 8) ...

Page 14

... Ultra-Low-Power Current Monitors The MAX4240–MAX4244 are ideal for applications powered from a 2-cell battery stack. Figure 11 shows an application circuit in which the MAX4240 is used for monitoring the current of a 2-cell battery stack. In this circuit, a current load is applied, and the voltage drop at the battery terminal is sensed. ...

Page 15

... MAX4243 N.C. 5 SHDNA 6 N.C. 7 ______________________________________________________________________________________ Beyond-the-Rails Op Amps ___________________Chip Information MAX4240/MAX4241 TRANSISTOR COUNT: 234 V CC MAX4242/MAX4243 TRANSISTOR COUNT: 466 MAX4244 TRANSISTOR COUNT: 932 SUBSTRATE CONNECTED TO V MAX4240 V EE OUTA INA OUTB MAX4242 INA INB INB+ EE SO/ MAX ...

Page 16

... Revision History Pages changed at Rev 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. ...

Related keywords