Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Op-amp Current feedback SOIC 8 N

_______________General Description

The MAX4223–MAX4228 current-feedback amplifiers

combine ultra-high-speed performance, low distortion,

and excellent video specifications with low-power oper-

ation. The MAX4223/MAX4224/MAX4226/MAX4228

have a shutdown feature that reduces power-supply

current to 350µA and places the outputs into a high-

impedance state. These devices operate with dual sup-

plies ranging from ±2.85V to ±5.5V and provide a

typical output drive current of 80mA. The MAX4223/

MAX4225/MAX4226 are optimized for a closed-loop

gain of +1 (0dB) or more and have a -3dB bandwidth of

1GHz, while the MAX4224/MAX4227/MAX4228 are

compensated for a closed-loop gain of +2 (6dB) or

more, and have a -3dB bandwidth of 600MHz (1.2GHz

gain-bandwidth product).

The MAX4223–MAX4228 are ideal for professional video

applications, with differential gain and phase errors of

0.01% and 0.02°, 0.1dB gain flatness of 300MHz, and a

1100V/µs slew rate. Total harmonic distortion (THD) of

-60dBc (10MHz) and an 8ns settling time to 0.1% suit

these devices for driving high-speed analog-to-digital

inputs or for data-communications applications. The low-

power shutdown mode on the MAX4223/MAX4224/

MAX4226/MAX4228 makes them suitable for portable

and battery-powered applications. Their high output

impedance in shutdown mode is excellent for multiplex-

ing applications.

The single MAX4223/MAX4224 are available in space-

saving 6-pin SOT23 packages. All devices are available

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

________________________Applications

ADC Input Buffers Data Communications

Video Cameras Video Line Drivers

Video Switches Video Multiplexing

Video Editors XDSL Drivers

RF Receivers Differential Line Drivers

____________________________Features

♦ Ultra-High Speed and Fast Settling Time:

1GHz -3dB Bandwidth (MAX4223, Gain = +1)

600MHz -3dB Bandwidth (MAX4224, Gain = +2)

1700V/µs Slew Rate (MAX4224)

5ns Settling Time to 0.1% (MAX4224)

♦ Excellent Video Specifications (MAX4223):

Gain Flatness of 0.1dB to 300MHz

0.01%/0.02° DG/DP Errors

♦ Low Distortion:

-60dBc THD (f

= 10MHz)

42dBm Third-Order Intercept (f = 30MHz)

♦ 6.0mA Quiescent Supply Current (per amplifier)

♦ Shutdown Mode:

350µA Supply Current (per amplifier)

100kΩ Output Impedance

♦ High Output Drive Capability:

80mA Output Current

Drives up to 4 Back-Terminated 75Ω Loads to

±2.5V while Maintaining Excellent Differential

Gain/Phase Characteristics

♦ Available in Tiny 6-Pin SOT23 and 10-Pin µMAX

Packages

MAX4223–MAX4228

1GHz, Low-Power, SOT23,

Current-Feedback Amplifiers with Shutdown

________________________________________________________________

Maxim Integrated Products

IN-

IN+

SHDN

OUT

MAX4223

MAX4224

SOT23-6

TOP VIEW

_________________Pin Configurations

19-1230; Rev 2a; 6/97

PART

MAX4223EUT-T

MAX4223ESA -40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

6 SOT23

8 SO

EVALUATION KIT

AVAILABLE

______________Ordering Information

_____________________Selector Guide

Pin Configurations

continued at end

of data sheet.

Ordering Information continued at end of data sheet.

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.

SOT

TOP MARK

AAAD

—

10 µMAX,

14 SO

8 SO

10 µMAX,

14 SO

8 SO

6 SOT23, 8 SO

PIN-

PACKAGE

Yes

SHUT-

DOWN

MODE

AMPS

PER

PKG.

2MAX4227

MAX4228

PART

1MAX4225

MAX4226

1MAX4223

MAX4224

MIN.

GAIN

Summary of content (20 pages)

PAGE 1
9-1230; Rev 2a; 6/97 KIT ATION EVALU E L B AVAILA 1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown The MAX4223–MAX4228 are ideal for professional video applications, with differential gain and phase errors of 0.01% and 0.02°, 0.1dB gain flatness of 300MHz, and a 1100V/µs slew rate. Total harmonic distortion (THD) of -60dBc (10MHz) and an 8ns settling time to 0.1% suit these devices for driving high-speed analog-to-digital inputs or for data-communications applications.
PAGE 2
MAX4223–MAX4228 1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to VEE) ..................................................12V Analog Input Voltage .......................(VEE - 0.3V) to (VCC + 0.3V) Analog Input Current ........................................................±25mA SHDN Input Voltage.........................(VEE - 0.3V) to (VCC + 0.3V) Short-Circuit Duration OUT to GND ...........................................................
PAGE 3
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown (VCC = +5V, VEE = -5V, SHDN = 5V, VCM = 0V, RL = ∞, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SHDN Input Current SYMBOL IIL/IIH CONDITIONS MIN SHDN = 0V or 5V SHDN = 0V, VOUT = -2.5V to +2.
PAGE 4
AC ELECTRICAL CHARACTERISTICS (continued) (VCC = +5V, VEE = -5V, SHDN = 5V, VCM = 0V, AV = +1V/V for MAX4223/MAX4225/MAX4226, AV = +2V/V for MAX4224/MAX4227/ MAX4228, RL = 100Ω, TA = +25°C, unless otherwise noted.) (Note 4) PARAMETER SYMBOL Output Impedance ZOUT Third-Order Intercept CONDITIONS MIN TYP f = 10kHz SFDR f = 10kHz 1dB Gain Compression MAX MAX4223/5/6 42 MAX4224/7/8 36 MAX4223/5/6 -61 MAX4224/7/8 -62 UNITS Ω 2 f = 30kHz fz = 30.
PAGE 5
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown MAX4224 SMALL-SIGNAL GAIN vs. FREQUENCY (AVCL = +5/+10) VIN = 20mVp-p 3 AVCL = +5V/V RF = 240Ω RG = 62Ω 0 -1 -2 SO-8 PACKAGE RF = RG = 470Ω SOT23-6 PACKAGE RF = RG = 470Ω -5 10 100 AVCL = +10V/V RF = 130Ω RG = 15Ω -2 -3 -4 -6 1 1000 10 1000 1 0.4 MAX4223-07 VIN = 20mVp-p AVCL = +1V/V RF = 560Ω VIN = 2OmVp-p AVCL = +1V/V RF = 560Ω 0.3 0.2 GAIN (dB) 0 -1 -2 -3 AMPLIFIER A 0 AMPLIFIER B -0.3 0 -1 -2 -3 -4 -0.
PAGE 6
____________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, RL = 100Ω, TA = +25°C, unless otherwise noted.) MAX4224/MAX4227/MAX4228 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (AVCL = +2) -10 -20 -20 -30 VCC -50 -60 VCC -40 -50 -60 VEE -70 VEE -70 -80 10 MAX4223/5/6 AVCL = +1V/V RF = 560Ω 1 MAX4224/7/8 AVCL = +2V/V RF = RG = 470Ω 0.1 -80 -90 -90 0.01 0.1 1 10 100 0.01 0.01 0.1 1 10 100 0.01 0.
PAGE 7
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown MAX4223/MAX4225/MAX4226 SMALL-SIGNAL PULSE RESPONSE (AVCL = +1) MAX4224/MAX4227/MAX4228 SMALL-SIGNAL PULSE RESPONSE (AVCL = +2) MAX4223/MAX4225/MAX4226 SMALL-SIGNAL PULSE RESPONSE (AVCL = +1, CL = 25pF) MAX4223-22 MAX4223-24 MAX4223-23 +100mV +50mV +100mV GND INPUT GND INPUT -100mV +100mV GND OUTPUT -100mV GND INPUT -100mV -50mV +100mV +100mV OUTPUT GND OUTPUT -100mV -100mV GND TIME (10ns/div) TIME (10ns/div) TIME
PAGE 8
____________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, RL = 100Ω, TA = +25°C, unless otherwise noted.) NORMAL MODE 160 4 5 4 3 CURRENT (mA) SINKING CURRENT (µA) 6 3 IB2 150 140 SOURCING IB+ 2 130 1 SHUTDOWN MODE 1 0 120 0 -50 -25 0 25 50 75 100 -25 -50 TEMPERATURE (°C) 0 25 50 75 3.0 75 RL = 50Ω 2.5 2.0 1.5 MAX4223-35 -1.0 -1.5 NEGATIVE OUTPUT SWING (V) RL = OPEN 3.5 50 NEGATIVE OUTPUT SWING vs. TEMPERATURE MAX4223-34 4.
PAGE 9
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown PIN MAX4223/MAX4224 MAX4225 MAX4227 MAX4226/MAX4228 NAME FUNCTION FUNCTION SOT23 SO SO µMAX SO — 1, 5 — — 5, 7, 8, 10 N.C. No Connect. Not internally connected. Tie to GND for optimum AC performance. 1 6 — — — OUT Amplifier Output 2 4 4 4 4 VEE Negative Power-Supply Voltage. Connect to -5V. 3 3 — — — IN+ Amplifier Noninverting Input 4 2 — — — IN- Amplifier Inverting Input Amplifier Shutdown.
PAGE 10
MAX4223–MAX4228 1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown _______________Detailed Description The MAX4223–MAX4228 are ultra-high-speed, lowpower, current-feedback amplifiers featuring -3dB bandwidths up to 1GHz, 0.1dB gain flatness up to 300MHz, and very low differential gain and phase errors of 0.01% and 0.02°, respectively. These devices operate on dual ±5V or ±3V power supplies and require only 6mA of supply current per amplifier.
PAGE 11
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown 1) Do not use wire-wrapped boards (they are too inductive) or breadboards (they are too capacitive). 2) Do not use IC sockets. IC sockets increase reactance. 3) Keep signal lines as short and straight as possible. Do not make 90° turns; round all corners. 4) Observe high-frequency bypassing techniques to maintain the amplifier’s accuracy and stability.
PAGE 12
MAX4223–MAX4228 1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown DC and Noise Errors The MAX4223–MAX4228 output offset voltage, V OUT (Figure 2), can be calculated with the following equation: ( RG ) VOUT = VOS x 1 + RF /RG + IB + x RS RF IN-  RF  x 1 +  + IB − x RF R  G IB- OUT VOUT where: VOS = input offset voltage (in volts) 1 + RF / RG = amplifier closed-loop gain (dimensionless) IB+ = input bias current (in amps) IB- = inverting input bias current (in amps) RG = gain-s
PAGE 13
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown small gain error. At higher capacitive loads, AC performance is limited by the interaction of load capacitance with the isolation resistor. Video Line Driver Figures 7 and 8 show a suggested layout for Maxim’s high-speed, single-amplifier evaluation boards. These boards were developed using the techniques described above.
PAGE 14
-3dB BANDWIDTH (MHz) 40 RISING-EDGE SLEW RATE (V/µs) Figure 5c. MAX4223 Rising-Edge Slew-Rate Distribution 400–420 925–950 875–900 825–850 775–800 725–750 0–500 1225–1250 1175–1200 1125–1150 1075–1100 975–1000 0 1025–1050 0 925–950 10 875–900 10 675–700 20 625–650 20 SIMULATION LOWER LIMIT 30 575–600 SIMULATION LOWER LIMIT MAX4223-fig5d 100 UNITS NUMBER OF UNITS 40 0–800 360–380 50 525–550 100 UNITS 825–850 320–340 Figure 5b. MAX4223 ±0.
PAGE 15
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown 40 -3dB BANDWIDTH (MHz) Figure 6c.
PAGE 16
MAX4223–MAX4228 1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown Figure 7a. Maxim SOT23 High-Speed Evaluation Board Component Placement Guide—Component Side Figure 7b. Maxim SOT23 High-Speed Evaluation Board PC Board Layout—Component Side 16 Figure 7c.
PAGE 17
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown MAX4223–MAX4228 Figure 8a. Maxim SO-8 High-Speed Evaluation Board Component Placement Guide—Component Side Figure 8b. Maxim SO-8 High-Speed Evaluation Board PC Board Layout—Component Side Figure 8c.
PAGE 18
MAX4223–MAX4228 1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown _____________________________________________Pin Configurations (continued) TOP VIEW MAX4223 MAX4224 MAX4225 MAX4227 N.C. 1 8 SHDN IN- 2 7 IN+ 3 VEE 4 OUTA 1 8 VCC VCC INA- 2 7 OUTB 6 OUT INA+ 3 6 INB- 5 N.C.
PAGE 19
1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown PART TEMP.
PAGE 20
10LUMAXB.EPS ________________________________________________________Package Information 6LSOT.EPS MAX4223–MAX4228 1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdown 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.