MAX4287 Maxim, MAX4287 Datasheet

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MAX4287

Manufacturer Part Number
MAX4287
Description
The MAX4285/MAX4286 single and MAX4287/MAX4288/MAX4387/MAX4388 dual ADC buffer amplifiers feature high-speed performance and single +3V supply operation
Manufacturer
Maxim
Datasheet

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The MAX4285/MAX4286 single and MAX4287/MAX4288/
MAX4387/MAX4388 dual ADC buffer amplifiers feature
high-speed performance and single +3V supply opera-
tion. The MAX4285/MAX4286/MAX4288 and MAX4388
offer a disable feature that reduces power-supply current
and places the outputs in a high-impedance state. All six
devices operate from a +2.85V to +6.5V single supply or
from ±1.425V to ±3.25V dual supplies. The common-
mode input voltage range extends to the negative power-
supply rail (ground in single-supply applications).
These devices require 20mA of quiescent supply current
per amplifier while achieving a 250MHz -3dB bandwidth
and a 350V/µs slew rate. The combination of an 8ns (to
0.1%) settling time, 88dBc (f = 5MHz) of SFDR, and up to
100mA output drive makes these amplifiers ideal for high-
speed ADC drivers for communications and instrumenta-
tion applications. In addition, when disabled, their high
output impedance makes them ideal for multiplexing
applications.
The MAX4285/MAX4286 are available in space-saving
6-pin SOT23 and 8-pin SO packages. The MAX4287/
MAX4387 come in 8-pin µMAX and 8-pin SO packages,
while the MAX4288/MAX4388 come in 10-pin µMAX and
14-pin SO packages.
Typical Operating Circuit appears at end of data sheet.
Pin Configurations appear at end of data sheet.
19-1500; Rev 0; 4/00
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769
+3V/+5V, 250MHz, SOT23 ADC Buffer Amplifiers
MAX4285
MAX4286
MAX4287
MAX4288
MAX4387
MAX4388
PART
High-Speed ADC Drivers
Communications Equipment
Instrumentation
CCD Imaging Systems
Ultrasound
________________________________________________________________ Maxim Integrated Products
OP AMPS
PER PKG
General Description
1
1
2
2
2
2
MIN GAIN
Applications
1
5
1
1
5
5
-3dB BANDWIDTH
(AT MIN GAIN)
250MHz
150MHz
250MHz
250MHz
150MHz
150MHz
with High-Speed Disable
o High Speed at 3V
o +2.85V to +6.5V Single-Supply Operation
o Input Common-Mode Range Extends to V
o Low Distortion at 5MHz
o High Output Current Drive: -106mA to +77mA
o 6ns Settling Time to 0.1%
o High-Speed Enable/Disable
o Space-Saving SOT23 and µMAX Packages
Ordering Information continued at end of data sheet.
MAX4285EUT-T -40°C to +85°C
MAX4285ESA
MAX4286EUT-T -40°C to +85°C
MAX4286ESA
MAX4287EUA
MAX4287ESA
250MHz -3dB Bandwidth (MAX4285/87/88)
150MHz -3dB Bandwidth (MAX4286, MAX4387/88)
350V/µs Slew Rate
-88dBc SFDR
40ns Enable Time
50ns Disable Time
High Output Impedance
PART
HIGH-SPEED
DISABLE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Yes
Yes
Yes
Yes
No
No
RANGE
TEMP.
Ordering Information
10-pin µMAX/14-pin SO
10-pin µMAX, 14-pin SO
6-pin SOT23, 8-pin SO
6-pin SOT23, 8-pin SO
8-pin µMAX/SO
8-pin µMAX/SO
Selector Guide
PIN-
PACKAGE
6 SOT23-6
8 SO
6 SOT23-6
8 SO
8 µMAX
8 SO
PIN-PACKAGE
Features
SOT TOP
EE
MARK
AABQ
AABR
1

Related parts for MAX4287

MAX4287 Summary of contents

Page 1

... In addition, when disabled, their high output impedance makes them ideal for multiplexing applications. The MAX4285/MAX4286 are available in space-saving 6-pin SOT23 and 8-pin SO packages. The MAX4287/ MAX4387 come in 8-pin µMAX and 8-pin SO packages, while the MAX4288/MAX4388 come in 10-pin µMAX and 14-pin SO packages. ...

Page 2

... Lead Temperature (soldering, 10s) .................................+300°C = ∞ 1V, and MIN CONDITIONS Guaranteed by PSRR test Guaranteed by CMRR test MAX4_87EU_/MAX4_88EU_/MAX4_8_ES_ MAX4285EUT-T/MAX4286EUT-T MAX4287/88 and MAX4387/88 Differential (-10mV ≤ V ≤ +10mV) IN ≤ V ≤ V Common mode ( MAX4_87EU_/ MAX4_88EU_/ MAX4_8_ES_ ≤ V ≤ ...

Page 3

SOT23 ADC Buffer Amplifiers DC ELECTRICAL CHARACTERISTICS (continued +3V DISABLE_ = 3V +25°C.) (Note 1) A PARAMETER SYMBOL Output Current Drive I OUT Power-Supply Rejection Ratio PSRR Disabled ...

Page 4

... Input Capacitance C IN Output Impedance Z OUT Enable Time t ON Disable Time t OFF Crosstalk X TALK 4 _______________________________________________________________________________________ = 300Ω / 1V +1V/V for MAX4285/MAX4287/MAX4288 VCL = +25°C, unless otherwise noted.) A CONDITIONS MAX4285/87/ 100mVp-p MAX4286 and SS OUT MAX4387/ 1Vp-p LS OUT MAX4285/87/ 100mVp-p ...

Page 5

... 1MHz 1MHz 10MHz OUT V = 1V, to within 0.1% ON OUT V = 1V, to within 0.1% OUT MAX4287/88 and MAX4387/88 10MHz 2Vp-p OUT = +25°C. Specifications over temperature limits are guaran +1V/V for MAX4285/MAX4287/MAX4288, A MIN TYP MAX 220 130 195 75 40 385 4.2 2 6.5 1.9 2 ...

Page 6

... FREQUENCY (Hz) MAX4285/MAX4287/MAX4288 GAIN FLATNESS vs. FREQUENCY (R = 1kΩ) LOAD 0 +1V/V V 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 100k 1M 10M 100M FREQUENCY (Hz) MAX4285/MAX4287/MAX4288 DISTORTION vs. FREQUENCY - 300Ω 0.5Vp-p OUT - +1V/V V -60 -70 -80 2ND HARMONIC -90 3RD HARMONIC -100 0 FREQUENCY (MHz) MAX4285/MAX4387/MAX4288 GAIN FLATNESS vs. FREQUENCY (R = 100Ω) LOAD 0 ...

Page 7

... MAX4285/MAX4287/MAX4288 DISTORTION vs. SWING - 300Ω 20MHz - +1V/V V 2ND HARMONIC -60 -70 -80 -90 -100 -110 3RD HARMONIC -120 0 0.25 0.50 0.75 VOLTAGE (Vp-p) MAX4287/MAX4288/MAX4387/MAX4388 CROSSTALK vs. FREQUENCY -20 -40 -60 -80 -100 -120 1G 0 FREQUENCY (MHz) MAX4286/MAX4387/MAX4388 LARGE-SIGNAL PULSE RESPONSE (A = +5V/V) V INPUT 100mV/ div OUTPUT ...

Page 8

... C (pF) LOAD COMMON-MODE REJECTION vs. FREQUENCY 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 100k 1M 10M 100M FREQUENCY (Hz) MAX4285/MAX4287/MAX4288 SMALL-SIGNAL PULSE RESPONSE (C = 22pF +1V/V) LOAD V INPUT 50mV/ div OUTPUT 50mV/ div TIME (5ns/div) GROUP DELAY vs. FREQUENCY 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 250 100k 1M 10M ...

Page 9

SOT23 ADC Buffer Amplifiers = 0, DISABLE_ ≥ 2V +3V VOLTAGE NOISE DENSITY vs. FREQUENCY 100 100 1k 10k 100k 1M FREQUENCY (Hz) INPUT OFFSET CURRENT vs. TEMPERATURE 0.5 ...

Page 10

SOT23 ADC Buffer Amplifiers with High-Speed Disable = 0, DISABLE_ ≥ 2V +3V MAX4286 SMALL-SIGNAL GAIN vs. FREQUENCY 37pF) LOAD ISO LOAD 2 +5V/V ...

Page 11

... INB OUTB MAX4388 have dual disable pins (DISABLEA, DISA- BLEB). The MAX4285/MAX4287/MAX4288 are internally com- pensated for unity-gain stability. The MAX4286/ MAX4387/MAX4388 are compensated for gains of +5V/V or greater. Applications Information Inverting and Noninverting Configurations Select the gain-setting feedback (R resistor values considering the following criteria: large resistor values increase voltage noise and interact with the amplifier’ ...

Page 12

... The linear output range of these devices 0.4V not recommended due to reduced gain and phase margin Figure 1. Using an Isolation Resistor (R Loads Output Drive Capability - 0.4V). Operation beyond this range MAX4285 MAX4286 MAX4287 MAX4288 MAX4387 MAX4388 ) for High Capacitive ...

Page 13

... INB INB DISABLEB DISABLEA 6 N.C. 7 Typical Operating Circuit R F A/D CONVERTER V IN MAX4285 MAX4286 MAX4287 MAX4288 MAX4387 MAX4388 Pin Configurations MAX4287 MAX4387 OUTA INA OUTB INA INB INB+ EE 8-PIN SO/µMAX MAX4288 MAX4388 OUTB ...

Page 14

SOT23 ADC Buffer Amplifiers with High-Speed Disable 14 ______________________________________________________________________________________ Package Information ...

Page 15

SOT23 ADC Buffer Amplifiers ______________________________________________________________________________________ with High-Speed Disable Package Information (continued) 15 ...

Page 16

... SOT23 ADC Buffer Amplifiers with High-Speed Disable 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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