MAX4125 Maxim, MAX4125 Datasheet

MAX4125

Manufacturer Part Number

MAX4125

Description

The MAX4122–MAX4129 family of operational amplifiers combines wide bandwidth and excellent DC accuracy with rail-to-rail operation at the inputs and outputs

Manufacturer

Maxim

Datasheet

1.MAX4122.pdf (16 pages)

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The MAX4122–MAX4129 family of operational amplifiers

combines wide bandwidth and excellent DC accuracy with

Rail-to-Rail

devices require only 650µA per amplifier, and operate from

either a single supply (+2.7V to +6.5V) or dual supplies

(±1.35V to ±3.25V) with a common-mode voltage range

that extends 250mV beyond V

ble of driving 250Ω loads. The MAX4122/MAX4123/

MAX4126/MAX4127/MAX4129 have a 5MHz gain band-

width product, while the decompensated MAX4124/

MAX4125/MAX4128 (stable at closed-looped gains of

10 or greater) have a 25MHz gain bandwidth product. In

addition, the MAX4123/MAX4125/MAX4127 feature a

shutdown mode in which the outputs are placed in a

high-impedance state and the supply current is reduced

to only 25µA per amplifier.

With their rail-to-rail input common-mode range and

output swing, these amplifiers are ideal for low-voltage

single-supply operation. Although the minimum operat-

ing voltage is specified at 2.7V, the devices typically

operate down to 1.8V. In addition, low offset voltage

and high speed make them the ideal signal-condition-

ing stages for precision, low-voltage, data-acquisition

systems. The MAX4122 and MAX4124 come in the

space-saving 5-pin SOT23-5 package.

________________________Applications

19-1087; Rev 1; 8/97

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

Single/Dual/Quad, Wide-Bandwidth, Low-Power,

MAX4122

MAX4123

MAX4124

MAX4125

MAX4126

MAX4127

MAX4128

MAX4129

PART

Battery-Powered Instruments

Portable Equipment

Data-Acquisition Systems

Signal Conditioning

Low-Power, Low-Voltage Applications

operation at the inputs and outputs. These

(MHz)

________________________________________________________________ Maxim Integrated Products

AMPS

PKG.

PER

General Description

Single-Supply Rail-to-Rail I/O Op Amps

Selection Table

and V

DOWN

SHUT-

MODE

Yes

—

. They are capa-

5 SOT23-5

8 SO/µMAX

5 SOT23-5

8 SO/µMAX

14 SO

8 SO/µMAX

14 SO

PACKAGE

PIN-

Ordering Information continued at end of data sheet.

* Dice are specified at T

Pin Configurations appear at end of data sheet.

__________Typical Operating Circuit

INTERFACE

MAX4122EUK

MAX4123C/D

MAX4123ESA -40°C to +85°C

MAX4123EUA -40°C to +85°C

5-Pin SOT23 Package (MAX4122/4)

+2.7V to +6.5V Single-Supply Operation

Rail-to-Rail Input Common-Mode Voltage Range

Rail-to-Rail Output Voltage Swing

5MHz Gain-Bandwidth Product (MAX4122/3/6/7/9)

25MHz Gain-Bandwidth Product (MAX4124/5/8)

650µA Quiescent Current per Amplifier

25µA Shutdown Function (MAX4123/5/7)

200µV Offset Voltage

No Phase Reversal for Overdriven Inputs

Drive 250Ω Loads

Stable with 500pF Capacitive Loads

Unity-Gain Stable (MAX4122/3/6/7/9)

Stable at Gains ≥ 10V/V (MAX4124/5/8)

SERIAL

PART

DOUT

SCLK

SHDN

-40°C to +85°C

TEMP. RANGE

0°C to +70°C

MAX187

= +25°C, DC parameters only.

Ordering Information

VREF

GND

AIN

+5V

5 SOT23-5

Dice*

8 SO

8 µMAX

PACKAGE

PIN-

MAX4123

Features

MARKING

INFO.

AAAZ

—

Related parts for MAX4125

MAX4125 Summary of contents

Page 1

... EE ble of driving 250Ω loads. The MAX4122/MAX4123/ MAX4126/MAX4127/MAX4129 have a 5MHz gain band- width product, while the decompensated MAX4124/ MAX4125/MAX4128 (stable at closed-looped gains greater) have a 25MHz gain bandwidth product. In addition, the MAX4123/MAX4125/MAX4127 feature a shutdown mode in which the outputs are placed in a high-impedance state and the supply current is reduced to only 25µ ...

Page 2

... L CC CONDITIONS MAX4123ESA/MAX4125ESA MAX4122EUK/MAX4124EUK MAX4123EUA/MAX4125EUA = MAX4126ESA/MAX4127ESD/MAX4128ESA MAX4126EUA/MAX4128EUA MAX4129ESD = < 1.5V DIFF MAX4123ESA/MAX4125ESA - MAX4122EUK/MAX4124EUK MAX4123EUA/MAX4125EUA < MAX4126ESA/MAX4127ESD/MAX4128ESA + MAX4126EUA/MAX4128EUA MAX4129ESD = 2. OUT 0.25V to 2.45V 100kΩ OUT 0.4V to 2.3V 250Ω OUT 0.25V to 4.75V 100kΩ OUT ...

Page 3

... 100kΩ 250Ω OUT CC /2, SHDN ≥ 2V (or open 0V /2, R tied to V OUT CONDITIONS MAX4123ESA/MAX4125ESA MAX4122EUK/MAX4124EUK MAX4123EUA/MAX4125EUA = MAX4126ESA/MAX4127ESD/MAX4128ESA MAX4126EUA/MAX4128EUA MAX4129ESD = MAX4123ESA/MAX4125ESA - MAX4122EUK/MAX4124EUK EE MAX4123EUA/MAX4125EUA < CM ...

Page 4

... MAX4129 SHDN Logic Threshold MAX4123/MAX4125/MAX4127 SHDN Input Current MAX4123/MAX4125/MAX4127 Operating Supply-Voltage Range Supply Current per Amplifier V CM SHDN < 0.8V, Shutdown Supply Current per Amplifier MAX4123/MAX4125/MAX4127 AC ELECTRICAL CHARACTERISTICS = 0V, SHDN ≥ 2V (or open +2.7V to +6.5V PARAMETER MAX4122/23/26/27/29 Gain-Bandwidth Product MAX4124/25/28 (A MAX4122/23/26/27/29 Phase Margin ...

Page 5

Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps AC ELECTRICAL CHARACTERISTICS (continued) = 0V, SHDN ≥ 2V (or open +2.7V to +6.5V PARAMETER SHDN Delay Input Capacitance Input Noise Voltage Density Input Noise Current ...

Page 6

Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps (V = + MAX4126/27/28/29 CHANNEL SEPARATION vs. FREQUENCY 130 120 110 100 100 1k ...

Page 7

... 110 R = 10k L 100 500 100 200 300 400 600 OUTPUT VOLTAGE: EITHER SUPPLY (mV) MAXIMUM OUTPUT VOLTAGE vs. TEMPERATURE 300 250 V = 6.5V 200 V = 2.7V 500 CC L 150 100 V = 6.5V 100k (TOP 2.7V 100k (BOTTOM) ...

Page 8

Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps (V = + MAX4123 MINIMUM OPERATING VOLTAGE vs. TEMPERATURE 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 -40 -25 ...

Page 9

... MAX4124/25/28 LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING + (200mV/div) OUT (2V/div) TIME (2 s/div) PIN MAX4122 MAX4123 MAX4126 MAX4124 MAX4125 MAX4128 1 6 — — — — — — 8 — — — — ...

Page 10

Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps Figure 1a. Reducing Offset Error Due to Bias Current (Noninverting Figure 2. Input Protection Circuit 10 ______________________________________________________________________________________ MAX4122– MAX4129 ...

Page 11

... Figure 4. Capacitive-Load Stability 0.00V to 2.90V. The maximum output voltage swing depends on the load, but will be within 150mV of a +3V supply, even with the maximum load (500Ω to ground). Driving a capacitive load can cause instability in most high-speed op amps, especially those with low quiescent current. The MAX4122– ...

Page 12

Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps 500pF L IN OUT TIME (400ns/div) Figure 5. MAX4122/23/26/27/29 Small-Signal Transient Response with Capacitive Load 1000pF ...

Page 13

... Using the test circuit of Figure 10, Figures 11 and 12 show the output voltage and supply current on power-up. The MAX4123, MAX4125, and MAX4127 have a shut- down option. When the shutdown pin (SHDN) is pulled low, the supply current drops below 25µA per amplifier and the amplifiers are disabled with the outputs in a high-impedance state ...

Page 14

... Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps TOP VIEW 1 8 N.C. 2 IN1- 7 MAX4123 MAX4125 3 IN1 SO/ MAX OUT1 1 14 IN1 IN1 MAX4127 N. SHDN1 ______________________________________________________________________________________ OUT MAX4122 V 2 MAX4124 EE 3 IN+ 4 IN- ...

Page 15

... OUT 0.036" (0.914mm) TRANSISTOR COUNT: 170 SUBSTRATE CONNECTED ______________________________________________________________________________________ Ordering Information (continued) PART MAX4124EUK MAX4125ESA -40°C to +85°C MAX4125EUA MAX4126ESA MAX4126EUA -40°C to +85°C MAX4127C/D MAX4127ESD MAX4128ESA -40°C to +85°C MAX4128EUA MAX4129ESD -40°C to +85°C *Dice are specified at T IN1- SHDN 0.055" ...

Page 16

... Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps ________________________________________________________Package Information 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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