Datasheet

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________________General Description

The MAX4040–MAX4044 family of micropower op amps

operates from a single +2.4V to +5.5V supply or dual

±1.2V to ±2.75V supplies and have rail-to-rail input and

output capabilities. These amplifiers provide a 90kHz

gain-bandwidth product while using only 10µA of supply

current per amplifier. The MAX4041/MAX4043 have a

low-power shutdown mode that reduces supply current

to less than 1µA and forces the output into a high-imped-

ance state. The combination of low-voltage operation,

rail-to-rail inputs and outputs, and ultra-low power con-

sumption makes these devices ideal for any

portable/battery-powered system.

These amplifiers have outputs that typically swing to

within 10mV of the rails with a 100kΩ load. Rail-to-rail

input and output characteristics allow the full power-

supply voltage to be used for signal range. The combi-

nation 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 MAX4040 is offered in a space-saving 5-pin SOT23

package. All specifications are guaranteed over the

-40°C to +85°C extended temperature range.

________________________Applications

Battery-Powered Strain Gauges

Systems

Sensor Amplifiers

Portable/Battery-Powered Cellular Phones

Electronic Equipment

Notebook Computers

Digital Scales PDAs

____________________________Features

♦ Single-Supply Operation Down to +2.4V

♦ Ultra-Low Power Consumption:

10µA Supply Current per Amplifier

1µA Shutdown Mode (MAX4041/MAX4043)

♦ Rail-to-Rail 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

8-Pin µMAX

Packages

MAX4040–MAX4044

Single/Dual/Quad, Low-Cost, SOT23,

Micropower Rail-to-Rail I/O Op Amps

________________________________________________________________ Maxim Integrated Products 1

IN-IN+

15V

OUT

MAX4040

SOT23-5

TOP VIEW

19-1377; Rev 1; 9/05

PART

MAX4040EUK-T

MAX4040EUA

MAX4040ESA -40°C to +85°C

-40°C to +85°C

TEMP RANGE

PIN-

PACKAGE

5 SOT23-5

8 µMAX

8 SO

Ordering Information

Pin Configurations continued at end of data sheet.

NO. OF

AMPS

PIN-PACKAGE

MAX4040 1

5-pin SOT23,

8-pin µMAX/SO

PART

MAX4041 1 8-pin µMAX/SO

SHUTDOWN

—

Yes

MAX4044 4 14-pin SO—

µMAX is a registered trademark of Maxim Integrated Products, Inc.

MAX4042EUA

MAX4042ESA -40°C to +85°C

-40°C to +85°C 8 µMAX

8 SO

MAX4044ESD

-40°C to +85°C 14 SO

SOT

TOP MARK

ACGF

—

Pin Configurations

Selector Guide

MAX4042 2 8-pin µMAX/SO—

MAX4043 2

10-pin µMAX/

14-pin SO

Yes

MAX4041ESA

MAX4041EUA -40°C to +85°C

-40°C to +85°C 8 SO

8 µMAX

—

MAX4043EUB

MAX4043ESD -40°C to +85°C

-40°C to +85°C 10 µMAX

14 SO

—

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.

Summary of content (16 pages)

PAGE 1
9-1377; Rev 1; 9/05 Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op Amps ____________________________Features The MAX4040–MAX4044 family of micropower op amps operates from a single +2.4V to +5.5V supply or dual ±1.2V to ±2.75V supplies and have rail-to-rail input and output capabilities. These amplifiers provide a 90kHz gain-bandwidth product while using only 10µA of supply current per amplifier.
PAGE 2
MAX4040–MAX4044 Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to VEE)..................................................+6V All Other Pins ...................................(VCC + 0.3V) to (VEE - 0.3V) Output Short-Circuit Duration to VCC or VEE ..............Continuous Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW 8-Pin µMAX (derate 4.1mW/°C above +70°C) ..............
PAGE 3
Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps (VCC = +5.0V, VEE = 0V, VCM = 0V, VOUT = VCC / 2, SHDN = VCC, RL = 100kΩ tied to VCC / 2, unless otherwise noted.
PAGE 4
ELECTRICAL CHARACTERISTICS—TA = TMIN to TMAX (continued) (VCC = +5.0V, VEE = 0V, VCM = 0V, VOUT = VCC / 2, SHDN = VCC, RL = 100kΩ tied to VCC / 2, unless otherwise noted.) (Note 3) PARAMETER SYMBOL Input Common-Mode Voltage Range CONDITIONS VCM MIN Inferred from the CMRR test TYP VEE MAX404_EU_ 60 All other packages 65 MAX UNITS VCC V Common-Mode Rejection Ratio CMRR VEE ≤ VCM ≤ VCC Power-Supply Rejection Ratio PSRR 2.4V ≤ VCC ≤ 5.5V 70 dB Large-Signal Voltage Gain AVOL (VEE + 0.
PAGE 5
Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps VCM = 0 200 100 0 2.5 -1 VCC = +5.5V -2 0 -2.5 -3 -5.0 -4 -40 -20 40 20 0 60 80 100 -60 TEMPERATURE (°C) -40 -20 0 20 40 60 120 RL TO VEE 100 VOLTAGE FROM VCC (mV) IBIAS (nA) 2.5 0 -2.5 -5.0 60 3.5 40 5.5 4.5 VCC = +5.5V, RL = 100kΩ VCC = +2.4V, RL = 100kΩ 0 20 40 60 80 60 VCC = +5.5V, RL = 20kΩ 40 VCC = +2.4V, RL = 10kΩ VCC = +5.5V, RL = 100kΩ 20 VCC = +2.
PAGE 6
____________________________________Typical Operating Characteristics (continued) (VCC = +5.0V, VEE = 0, VCM = VCC / 2, SHDN = VCC, RL = 100kΩ to VCC / 2, TA = +25°C, unless otherwise noted.) RL = 100kΩ 90 80 80 70 60 110 100 70 60 60 40 40 50 30 100 300 200 40 500 400 0 100 300 200 500 400 0 100 200 300 ∆VOUT (mV) ∆VOUT (mV) ∆VOUT (mV) OPEN-LOOP GAIN vs. OUTPUT SWING HIGH (VCC = +5.5V, RL TIED TO VEE) OPEN-LOOP GAIN vs. TEMPERATURE OPEN-LOOP GAIN vs.
PAGE 7
Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps (VCC = +5.0V, VEE = 0, VCM = VCC / 2, SHDN = VCC, RL = 100kΩ to VCC / 2, TA = +25°C, unless otherwise noted.) MAX4042/MAX4043/MAX4044 CROSSTALK vs. FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY THD + NOISE (%) -70 -80 -90 MAX4040/44-19 RL = 10kΩ GAIN (dB) 1 MAX4040/44-18 -60 0.1 -100 RL = 100kΩ RL = 10kΩ -110 0.01 100 10 1k 10k 1 100 1000 FREQUENCY (Hz) LOAD RESISTOR vs.
PAGE 8
MAX4040–MAX4044 Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps ______________________________________________________________Pin Description PIN MAX4040 SOT23-5 SO/µMAX MAX4041 MAX4042 MAX4043 µMAX SO NAME FUNCTION 1 6 6 — — — — OUT Amplifier Output. High impedance when in shutdown mode. 2 4 4 4 4 4 11 VEE Negative Supply. Tie to ground for single-supply operation.
PAGE 9
Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps R3 R3 = R1 R2 R1 R2 Rail-to-Rail Output Stage Figure 1a. Minimizing Offset Error Due to Input Bias Current (Noninverting) MAX4040– MAX4044 The MAX4040–MAX4044 output stage can drive up to a 25kΩ load and still swing to within 60mV of the rails. Figure 3 shows the output voltage swing of a MAX4040 configured as a unity-gain buffer, powered from a single +4.0V supply voltage.
PAGE 10
MAX4040-44 fig04 MAX4040-44 fig03 1V/div VIN = 2V RL = 100kΩ TIED TO VEE RL = 100kΩ TIED TO VEE VIN = 4.0V fIN = 1kHz OUT SHDN 5V/div 1V/div IN 1V/div OUT 200µs/div 200µs/div Figure 4. Shutdown Enable/Disable Output Voltage Shutdown Mode VCC = 5.5V, VOH = 200mV 1000 800 VCC = 2.4V, VOH = 200mV VCC = 5.5V, VOH = 100mV 600 VCC = 2.4V, VOH = 100mV 400 200 VCC = 5.5V, VOH = 50mV VCC = 2.4V, VOH = 50mV 0 -60 -40 -20 0 20 40 60 80 Figure 5a. Output Source Current vs.
PAGE 11
Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps RISO 2.4V - 0.1V RL = = 9.6kΩ to VEE 240µA The same application can drive a 4.6kΩ load resistor when terminated in VCC / 2 (+1.2V in this case). MAX4040– MAX4044 RL CL Driving Capacitive Loads The MAX4040–MAX4044 are unity-gain stable for loads up to 200pF (see Load Resistor vs. Capacitive Load graph in Typical Operating Characteristics).
PAGE 12
MAX4040-44 fig07 10,000 HYSTERESIS VHI INPUT VOH VLO tPD+; VCC = +5V 1000 tPD (µs) MAX4040–MAX4044 Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps VOH tPD-; VCC = +5V OUTPUT VOL 100 tPD+; VCC = +2.4V VIN RHYST tPD-; VCC = +2.4V R1 VCC 10 0 10 20 30 40 50 60 70 80 90 100 VOUT VOD (mV) R2 Figure 7. Propagation Delay vs. Input Overdrive The MAX4040–MAX4044 contain special circuitry to boost internal drive currents to the amplifier output stage.
PAGE 13
Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps TOP VIEW N.C. 1 IN- 2 8 N.C. N.C. 1 7 VCC IN- 2 MAX4040 IN+ 8 SHDN OUTA 1 7 VCC INA- 2 OUT IN+ 3 6 OUT VEE 4 5 N.C. VEE 4 5 N.C.
PAGE 14
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) SOT-23 5L .
PAGE 15
Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps 8 INCHES DIM A A1 A2 b E Ø0.50±0.1 H c D e E H 0.6±0.1 L 1 1 α 0.6±0.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6∞ 0∞ 0.0207 BSC 8LUMAXD.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0∞ 6∞ 0.
PAGE 16
Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) e 10LUMAX.EPS MAX4040–MAX4044 Single/Dual/Quad, Low-Cost, SOT23, Micropower, Rail-to-Rail I/O Op Amps 4X S 10 10 INCHES H Ø0.50±0.1 0.6±0.1 1 1 0.6±0.1 BOTTOM VIEW TOP VIEW D2 MILLIMETERS MAX DIM MIN 0.043 A 0.006 A1 0.002 A2 0.030 0.037 0.120 D1 0.116 0.118 D2 0.114 0.120 E1 0.116 0.