General Description
The MAX4389/MAX4390/MAX4392–MAX4396 family of
op amps are unity-gain stable devices that combine
high-speed performance, Rail-to-Rail®outputs, and dis-
able mode. These devices are targeted for applications
where an input or an output is exposed to the outside
world, such as video and communications.
The MAX4389/MAX4390/MAX4392–MAX4396 operate
from a single 4.5V to 11V supply or from dual ±2.25V to
±5.5V supplies. The common-mode input voltage range
extends to the negative power-supply rail (ground in sin-
gle-supply applications). The MAX4389/MAX4390/
MAX4392–MAX4396 consume only 5.5mA of quiescent
supply current per amplifier while achieving a 145MHz
-3dB bandwidth, 35MHz 0.1dB gain flatness, and a
200V/µs slew rate. Disable mode sets the outputs to high
impedance while consuming only 450µA of current.
The MAX4389 single, MAX4393 dual, MAX4394 triple,
and MAX4396 quad include disable capabilities. The
MAX4389 and MAX4390 are available in ultra-small,
6-pin SC70 packages.
Applications
Set-Top Boxes
Surveillance Video Systems
Analog-to-Digital Converter Interface
CCD Imaging Systems
Digital Cameras
Video-on-Demand
Video Line Driver
Features
♦Low Cost
♦High Speed
145MHz -3dB Bandwidth
35MHz 0.1dB Gain Flatness
200V/µs Slew Rate
♦Single 4.5V to 11V or Dual ±2.25V to ±5.5V
Operation
♦Rail-to-Rail Outputs
♦Input Common-Mode Range Extends to VEE
♦Low Differential Gain/Phase: 0.015%/0.015°
♦Low Distortion at 5MHz
-59dBc Spurious-Free Dynamic Range
♦High Output Drive: ±50mA
♦450µA Disable Capability
(MAX4389/MAX4393/MAX4394/MAX4396)
♦Space-Saving SC70, SOT23, µMAX, or TSSOP
Packages
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
________________________________________________________________ Maxim Integrated Products 1
VEE
IN-IN+
16VCC
5DISABLE
OUT
MAX4389
SC70/SOT23
TOP VIEW
2
34
Pin Configurations
19-2322; Rev 0; 1/02
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.
Ordering Information
PART TEMP RANGE PIN-
PACKAGE
TOP
MARK
MAX4389EXT-T -40°C to +85°C 6 SC70-6 ABF
MAX4389EUT-T -40°C to +85°C 6 SOT23-6 ABDC
MAX4390EXT-T -40°C to +85°C 6 SC70-6 ABE
MAX4390EUK-T -40°C to +85°C 5 SOT23-5 ADZM
Pin Configurations continued at end of data sheet.
200Ω200Ω
75Ω
75Ω
IN
OUT
VIDEO LINE DRIVER
Zo= 75Ω
DISABLE
MAX4389
Typical Operating Circuit
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
230
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (VCC to VEE) ..................................-0.3V to +12V
IN_+, IN_-, OUT_, DISABLE.............(VEE - 0.3V) to (VCC + 0.3V)
Differential Input Voltage ....................................................±2.5V
Current into Input Pins ......................................................±20mA
Output Short-Circuit Duration to
VCC or VEE (Note 1)................................................Continuous
Continuous Power Dissipation (TA= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW
6-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
14-Pin TSSOP (derate 10mW/°C above +70°C) ..........727mW
20-Pin TSSOP (derate 10.9mW/°C above +70°C) .......879mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS
(VCC = 5V, VEE = -5V, RL=∞to GND, VCM = 0, VOUT = GND, GND = 0, DISABLE = VCC, and TA= TMIN to TMAX, unless otherwise
noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range VCC, VEE Inferred from PSRR test ±2.25 ±5.5 V
Quiescent Supply Current ICC Per amplifier, DISABLE = VCC 6.5 10 mA
TA = +25°C 6.5 20
Input Offset Voltage VOS TA = -40°C to +85°C 28 mV
Input Offset Voltage
Temperature Coefficient TCVOS ±8 µV/°C
Input Offset Voltage Match MAX4392–MAX4396 ±1mV
Input Common-Mode Range VCM Inferred from the CMRR test VEE VCC -
2.25 V
Input Bias Current IB6.5 20 µA
Input Offset Current IOS 0.5 7 µA
Disable_ Logic Input Low
Current IIL MAX4389/MAX4393/MAX4394/MAX4396,
DISABLE = 0 25 60 µA
Disable_ Logic Input High
Current IIH MAX4389/MAX4393/MAX4394/MAX4396,
DISABLE = VCC 10 40 µA
Disable_ Supply Current ISHDN MAX4389/MAX4393/MAX4394/MAX4396,
DISABLE = 0 450 800 µA
Disable_ Voltage OFF VIL MAX4389/MAX4393/MAX4394/MAX4396 VCC -
3V
Disable_ Voltage ON VIH MAX4389/MAX4393/MAX4394/MAX4396 VCC -
1.25 V
Common mode (VEE < VCM < VCC - 2.25V) 1.5 MΩ
Input Resistance RIN Differential mode (-1V < VIN < 1V) 100 kΩ
Common-Mode Rejection Ratio CMRR VEE < VCM < VCC - 2.25V 66 75 dB
Open-Loop Gain AVOL VEE + 1V < V
OU T < V
CC - 1V , RL= 150Ω 50 63 dB
Power-Supply Rejection Ratio PSRR -5.5V < VEE < -4.5V, 5.5V > VCC > 4.5V 48 62 dB
Note 1: Continuous power dissipation must also be observed.
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
_______________________________________________________________________________________ 3
Note 2: All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.
AC ELECTRICAL CHARACTERISTICS
(VCC = 5V, VEE = -5V, RL=∞to GND, GND = 0, VOUT = 0, Gain = 1V/V, DISABLE = VCC, and TA= TMIN to TMAX, unless otherwise
noted. Typical values are at TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Small-Signal -3dB Bandwidth BWSS VOUT = 100mVP-P 145 MHz
Large-Signal -3dB Bandwidth BWLS VOUT = 2VP-P 127 MHz
Small-Signal Bandwidth for
0.1dB Gain Flatness BW0.1dBss VOUT = 100mVP-P 35 MHz
Large-Signal Bandwidth for
0.1dB Gain Flatness BW0.1 dBLS VOUT = 2VP-P 27 MHz
Slew Rate SR VOUT = 2V step 200 V/µs
Settling Time to 0.1% tSVOUT = 2V step 12 ns
Rise/Fall Time tR/tFVOUT = 100mVP-P 3ns
Spurious-Free Dynamic Range SFDR fC= 5MHz, VOUT = 2VP-P -59 dBc
Differential Phase Error DP NTSC, RL= 150Ω0.015 D eg rees
Differential Gain Error DG NTSC, RL= 150Ω0.015 %
Input Noise-Voltage Density enf = 10kHz 13 nV/√Hz
Input Noise-Current Density inf = 10kHz 2.1 pA/√Hz
Input Capacitance CIN 1pF
Output Impedance ZOUT f = 5MHz 0.6 Ω
Disable OFF Time MAX4389/MAX4393/MAX4394/MAX4396 0.65 µs
Disable ON Time MAX4389/MAX4393/MAX4394/MAX4396 0.35 µs
Channel-to-Channel Isolation CHISO MAX4392/MAX4393/MAX4394/MAX4395/
MAX4396, specified at DC -97 dB
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5V, VEE = -5V, RL=∞to GND, VCM = 0, VOUT = GND, GND = 0, DISABLE = VCC, and TA= TMIN to TMAX, unless otherwise
noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VCC - VOH 0.6 1
RL= 150Ω to GND VOL - VEE 0.4 0.8
VCC - VOH 0.2 0.3
Output-Voltage Swing VOUT
RL= 1kΩ to GND VOL - VEE 0.125 0.25
V
Sourcing 35 50
Output Source/Sink Current IOUT RL = 20Ω to GND Sinking 70 90 mA
Output Short-Circuit Current 100 mA
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
4 _______________________________________________________________________________________
SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4389 toc01
FREQUENCY (Hz)
GAIN (dB)
100M10M1M
-5
-4
-3
-2
-1
0
1
2
3
4
-6
100k 1G
VOUT = 100mVP-P
LARGE-SIGNAL GAIN vs. FREQUENCY
MAX4389 toc02
FREQUENCY (Hz)
GAIN (dB)
100M10M1M
-5
-4
-3
-2
-1
0
1
2
3
4
-6
100k 1G
VOUT = 2VP-P
SMALL-SIGNAL GAIN
FLATNESS vs. FREQUENCY
MAX4389 toc03
FREQUENCY (Hz)
GAIN (dB)
100M10M1M
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
-0.6
100k 1G
VOUT = 100mVP-P
LARGE-SIGNAL GAIN
FLATNESS vs. FREQUENCY
MAX4389 toc04
FREQUENCY (Hz)
GAIN (dB)
100M10M1M
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
-0.6
100k 1G
VOUT = 2VP-P
DISTORTION vs. FREQUENCY
MAX4389 toc07
FREQUENCY (Hz)
DISTORTION (dBc)
10M1M
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
100k 100M
VOUT = 2VP-P
AVCL = 2V/V
2ND HARMONIC
3RD HARMONIC
OUTPUT IMPEDANCE vs. FREQUENCY
MAX4389 toc05
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
100M10M1M
0.1
1
10
100
0.01
100k 1G
DISTORTION vs. FREQUENCY
MAX4389 toc06
FREQUENCY (Hz)
DISTORTION (dBc)
10M1M
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
100k 100M
VOUT = 2VP-P
3RD HARMONIC
2ND HARMONIC
AVCL = 1V/V
DISTORTION vs. FREQUENCY
MAX4389 toc08
FREQUENCY (Hz)
DISTORTION (dBc)
10M1M
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
100k 100M
VOUT = 2VP-P
AVCL = 5V/V
2ND HARMONIC
3RD HARMONIC
DISTORTION vs. RESISTIVE LOAD
MAX4389 toc09
RLOAD (Ω)
DISTORTION (dBc)
1000800600400200
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
0 1200
2ND HARMONIC
3RD HARMONIC
fo = 5MHZ
VOUT = 2VP-P
AVCL = 1V/V
Typical Operating Characteristics
(VCC = 5V, VEE = -5V, VCM = 0, AVCL = 1V/V, RL= 100Ωto GND, GND = 0, TA= +25°C, unless otherwise noted.)
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
_______________________________________________________________________________________ 5
DISTORTION vs. VOLTAGE SWING
MAX4389 toc10
VOLTAGE SWING (VP-P)
DISTORTION (dBc)
1.51.0
-80
-70
-60
-50
-40
-30
-20
-10
-90
0.5 2.0
fo = 5MHZ
AVCL = 1V/V
3RD HARMONIC
2ND HARMONIC
0
DIFFERENTIAL GAIN AND PHASE
MAX4389 toc11
IRE
DIFF GAIN (%)
20 30 40 50 60 70 80 9010
-0.010
-0.005
0
0.005
0.010
0.015
DIFF PHASE (°)
-0.010
-0.005
0.005
0
0.010
0.015
0.020
0100
COMMON-MODE REJECTION
vs. FREQUENCY
MAX4389 toc12
FREQUENCY (Hz)
CMR (dB)
100M10M1M
-70
-60
-50
-40
-30
-20
-10
0
-80
100k 1G
POWER-SUPPLY REJECTION
vs. FREQUENCY
MAX4389 toc13
FREQUENCY (Hz)
PSR (dB)
100M10M1M
-60
-50
-40
-30
-20
-10
0
-70
100k 1G
SMALL-SIGNAL PULSE RESPONSE
MAX4389 toc16
20ns/div
INPUT
25mV/div
OUTPUT
50mV/div
AVCL = +2V/V
RF = 200Ω
AVCL = 2V/V
RF = 200Ω
OUTPUT VOLTAGE SWING
vs. RESISTIVE LOAD
MAX4389 toc14
RLOAD (Ω)
OUTPUT VOLTAGE SWING (V)
500400100 200 300
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
0600
VCC - VOH
VOL- VEE
SMALL-SIGNAL PULSE RESPONSE
MAX4389 toc15
20ns/div
INPUT
50mV/div
OUTPUT
50mV/div
AVCL = 1V/V
SMALL-SIGNAL PULSE RESPONSE
MAX4389 toc17
20ns/div
INPUT
10mV/div
OUTPUT
50mV/div
AVCL = 5V/V
RF = 250Ω
LARGE-SIGNAL PULSE RESPONSE
MAX4389 toc18
20ns/div
INPUT
500mV/div
OUTPUT
500mV/div
AVCL = 1V/V
Typical Operating Characteristics (continued)
(VCC = 5V, VEE = -5V, VCM = 0, AVCL = 1V/V, RL= 100Ωto GND, GND = 0, TA= +25°C, unless otherwise noted.)
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
6 _______________________________________________________________________________________
LARGE-SIGNAL PULSE RESPONSE
MAX4389 toc19
20ns/div
INPUT
250mV/div
OUTPUT
500mV/div
AVCL = 2V/V
RF = 200Ω
LARGE-SIGNAL PULSE RESPONSE
MAX4389 toc20
20ns/div
INPUT
100mV/div
OUTPUT
500mV/div
AVCL = 5V/V
RF = 250Ω
VOLTAGE NOISE vs. FREQUENCY
MAX4389 toc21
FREQUENCY (Hz)
VOLTAGE NOISE (nV/√Hz)
10k1k10010
10
100
1000
1
1 100k
RL = 100Ω
CURRENT NOISE vs. FREQUENCY
MAX4389 toc22
FREQUENCY (Hz)
CURRENT NOISE (pA/√Hz)
10 100 1k 10k
10
100
1
1 100k
RL = 100Ω
OPEN-LOOP GAIN vs. RESISTIVE LOAD
MAX4389 toc25
RLOAD (Ω)
OPEN-LOOP GAIN (dBc)
1k
10
20
30
40
50
60
70
80
0
100 10k
ISOLATION RESISTANCE
vs. CAPACITIVE LOAD
MAX4389 toc23
CLOAD (pF)
RISO (Ω)
50045040035030025020015010050
10
11
12
13
14
15
16
9
0550
LARGE SIGNAL
VOUT = 2VP-P
SMALL SIGNAL
VOUT = 100mVP-P
SMALL-SIGNAL BANDWIDTH
vs. LOAD RESISTANCE
MAX4389 toc24
RLOAD (kΩ)
BANDWIDTH (MHz)
700600100 200 300 400 500
25
50
75
100
125
150
175
200
0
0800
CROSSTALK vs. FREQUENCY
MAX4389 toc26
FREQUENCY (Hz)
CROSSTALK (dB)
100M10M1M
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
100k 1G
DISABLE RESPONSE
MAX4389 toc27
200ns/div
5V
0
1.5V
VOUT
DISABLE
0
Typical Operating Characteristics (continued)
(VCC = 5V, VEE = -5V, VCM = 0, AVCL = 1V/V, RL= 100Ωto GND, GND = 0, TA= +25°C, unless otherwise noted.)
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
_______________________________________________________________________________________ 7
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX4389 toc28
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (mV)
7550-25 0 25
1
2
3
4
5
6
7
8
0
-50 100
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX4389 toc29
TEMPERATURE (°C)
INPUT BIAS CURRENT (µA)
7550-25 0 25
1
2
3
4
5
6
7
8
0
-50 100
SUPPLY CURRENT
vs. TEMPERATURE
MAX4389 toc30
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
7550-25 0 25
1
2
3
4
5
6
7
8
0
-50 100
Typical Operating Characteristics (continued)
(VCC = 5V, VEE = -5V, VCM = 0, AVCL = 1V/V, RL= 100Ωto GND, GND = 0, TA= +25°C, unless otherwise noted.)
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
8 _______________________________________________________________________________________
PIN
MAX4389 MAX4390 M AX4 392 M AX4 393 MAX4394 MAX4395 MAX4396
SC 70/SO T23 SC 70 SO T23 µ MAX/ SO µ MAX SO /TSSO PSO /TSSO PT SSO P
NAME FUNCTION
1 1 1 — — — — — OUT Amplifier
Output
2224 4 11 11 16V
EE
Negative
Power Supply.
Connect a
0.1µF
Capacitor to
GND.
3 3 3 — — — — — IN+ Noninverting
Input
4 4 4 — — — — — IN- Inverting Input
5——— — — — —DISABLE
Disab le.
Connect to
VCC to E nab le.
6658 10 4 4 5 V
CC
Posi ti ve P ow er
Supp ly.
Connect a
0.1µF Cap aci tor
to GN D.
— 5 — — — — — 10, 11 N.C.
No C onnecti on.
Not Inter nal ly
Connected .
— — — 3 3 5 3 4 INA+
Amplifier A
Noninverting
Input
— — — 2 2 6 2 3 INA- Amplifier A
Inverting Input
— — — 1 1 7 1 2 OUTA Amplifier A
Output
———— 5 1 — 1DISABLEA
Shutd ow n
Am plifi er A.
Connect to
VCC to E nab le.
— — — 5 7 10 5 6 INB+
Amplifier B
Noninverting
Input
— — — 6 8 9 6 7 INB- Amplifier B
Inverting Input
— — — 7 9 8 7 8 OUTB Amplifier B
Output
Pin Description
Detailed Description
The MAX4389/MAX4390/MAX4392–MAX4396 are dual-
supply, rail-to-rail, voltage-feedback amplifiers that
employ current-feedback techniques to achieve
200V/µs slew rates and 145MHz bandwidths. Excellent
harmonic distortion and differential gain/phase perfor-
mance make these amplifiers an ideal choice for a wide
variety of video and RF signal-processing applications.
Applications Information
The output voltage swings to within 200mV of each
supply rail. Local feedback around the output stage
ensures low open-loop output impedance to reduce
gain sensitivity to load variations. The input stage per-
mits common-mode voltages to the negative supply
and to within 2.25V of the positive supply rail.
Choosing Resistor Values
Unity-Gain Configuration
The MAX4389/MAX4390/MAX4392–MAX4396 are inter-
nally compensated for unity gain. When configured for
unity gain, a 24Ωresistor (RF) in series with the feed-
back path optimizes AC performance. This resistor
improves AC response by reducing the Q of the paral-
lel LC circuit formed by the parasitic feedback capaci-
tance and inductance.
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
_______________________________________________________________________________________ 9
PIN
MAX4389 MAX4390 M AX4 392 M AX4 393 MAX4394 MAX4395 MAX4396
SC 70/SO T23 SC 70 SO T23 µ MAX/ SO µ MAX SO /TSSO PSO /TSSO PT SSO P
NAME FUNCTION
———— 6 3 — 9DISABLEB
Shutd ow n
Am plifi er B.
Connect to
VCC to E nab le.
— — — — — 12 10 15 INC+
Amplifier C
Noninverting
Input
— — — — — 13 9 14 INC- Amplifier C
Inverting Input
— — — — — 14 8 13 OUTC Amplifier C
Output
———— — 2 — 12D ISABLE C
Shutdown
Amplifier C.
Connect to
VCC to Enable.
— — — — — — 12 17 IND+
Amplifier D
Noninverting
Input
— — — — — — 13 18 IND- Amplifier D
Inverting Input
— — — — — — 14 19 OUTD Amplifier D
Output
———— — — — 20D ISABLE D
Shutdown
Amplifier D.
Connect to
VCC to Enable.
Pin Description (continued)
MAX4389/MAX4390/MAX4392–MAX4396
Video Line Driver
The MAX4389/MAX4390/MAX4392–MAX4396 are low-
power, voltage-feedback amplifiers featuring band-
widths up to 100MHz, 0.1dB gain flatness to 15MHz.
They are designed to minimize differential-gain error
and differential-phase error to 0.015% and 0.015°,
respectively. They have a 12ns settling time to 0.1%,
200V/µs slew rates, and output-current-drive capability
of up to 50mA making them ideal for driving video
loads.
Inverting and Noninverting Configurations
Select the gain-setting feedback (RF) and input (RG)
resistor values to fit your application. Large resistor val-
ues increase voltage noise and interact with the amplifi-
er’s input and PC board capacitance. This can
generate undesirable poles and zeros and decrease
bandwidth or cause oscillations. For example, a nonin-
verting gain-of-two configuration (RF= RG) using 2kΩ
resistors, combined with 1pF of amplifier input capaci-
tance and 1pF of PC board capacitance, causes a pole
at 79.6MHz. Since this pole is within the amplifier band-
width, it jeopardizes stability. Reducing the 2kΩresis-
tors to 100Ωextends the pole frequency to 1.59GHz,
but could limit output swing by adding 200Ωin parallel
with the amplifier’s load resistor (Figures 1a and 1b).
Layout and Power-Supply Bypassing
The MAX4389/MAX4390/MAX4392–MAX4396 operate
from single 4.5V to 11V or from dual ±2.25V to ±5.5V
supplies. Bypass each supply with a 0.1µF capacitor as
close to the pin as possible.
Maxim recommends using microstrip and stripline tech-
niques to obtain full bandwidth. To ensure that the PC
board does not degrade the amplifier’s performance,
design it for a frequency greater than 1GHz. Pay care-
ful attention to inputs and outputs to avoid large para-
sitic capacitance. Whether or not you use a con-
stant-impedance board, observe the following design
guidelines:
• Do not use wire-wrap boards; they are too inductive.
• Do not use IC sockets; they increase parasitic cap-
acitance and inductance.
• Use surface-mount instead of through-hole compo-
nents for better, high-frequency performance.
• Use a PC board with at least two layers; it should be
as free from voids as possible.
• Keep signal lines as short and as straight as possi-
ble. Do not make 90° turns; round all corners.
Low-Power Disable Mode
The MAX4389/MAX4393/MAX4394/MAX4396 feature a
disable function that allows the amplifiers to be placed
in a low-power, high-output-impedance state. When the
disable pin (DISABLE) is active, the amplifier’s output
impedance is 95kΩ. This high resistance and the
low 2pF output capacitance make the MAX4389/
MAX4390/MAX4392–MAX4396 in RF/video multiplexer
or switch applications. For larger arrays, pay careful
attention to capacitive loading (see the Output
Capacitive Loading and Stability section).
Output Capacitive Loading and Stability
The MAX4389/MAX4390/MAX4392–MAX4396 are opti-
mized for AC performance. They are not designed to
drive highly reactive loads, which decrease phase mar-
gin and may produce excessive ringing and oscillation.
Figure 2 shows a circuit that eliminates this problem.
Figure 3 is a graph of the Optimal Isolation Resistor
(RS) vs. Capacitive Load. Figure 4 shows how a capac-
itive load causes excessive peaking of the amplifier’s
frequency response if the capacitor is not isolated from
the amplifier by a resistor. A small isolation resistor
(usually 10Ωto 15Ω) placed before the reactive load
prevents ringing and oscillation. At higher capacitive
loads, AC performance is controlled by the interaction
of the load capacitance and the isolation resistor.
Figure 5 shows the effect of a 15Ωisolation resistor on
closed-loop response.
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
10 ______________________________________________________________________________________
VIN
RG
VOUT = -(RF/ RG) VIN
RF
VOUT
MAX43_ _
Figure 1b. Inverting Gain Configuration
VIN
RG
VOUT = [1 + (RF/ RG)] VIN
RF
VOUT
MAX43_ _
Figure 1a. Noninverting Gain Configuration
Chip Information
MAX4389 TRANSISTOR COUNT: 70
MAX4390 TRANSISTOR COUNT: 70
MAX4392 TRANSISTOR COUNT: 204
MAX4393 TRANSISTOR COUNT: 204
MAX4394 TRANSISTOR COUNT: 298
MAX4395 TRANSISTOR COUNT: 396
MAX4396 TRANSISTOR COUNT: 396
PROCESS: BiCMOS
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
______________________________________________________________________________________ 11
RGRF
RISO
CL
VOUT
VIN
MAX438 _
Figure 2. Driving a Capacitive Load Through an Isolation Resistor
-5
-4
100k 10M 100M1M 1G
-2
FREQUENCY (Hz)
GAIN (dB)
0
2
4
-6
-3
-1
1
3
10pF
15pF
5pF
Figure 4. Small-Signal Gain vs. Frequency with Load
Capacitance and No Isolation Resistor
RISO = 27Ω
-5
-4
100k 10M 100M1M 1G
-2
FREQUENCY (Hz)
GAIN (dB)
0
2
4
-6
-3
-1
1
3
120pF
68pF 47pF
Figure 5. Small-Signal Gain vs. Frequency with Load
Capacitance and 27ΩIsolation Resistor
15
16
14
13
10
11
12
9
CLOAD (pF)
500 100 200 300150 250 350 400 450 500 550
RISO (Ω)
LARGE SIGNAL
(VOUT = 2VP-P)
SMALL SIGNAL
(VOUT = 100mVP-P)
Figure 3. Isolation Resistance vs. Capacitive Load
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
12 ______________________________________________________________________________________
VEE
IN-IN+
16VCC
5N.C.
OUT
MAX4390
SC70
TOP VIEW
2
34
Pin Configurations (continued)
VEE
IN-IN+
15VCC
OUT
MAX4390
SOT23
TOP VIEW
2
34
1
2
3
4
5
10
9
8
7
6
VCC
OUTB
INB-
INB+VEE
INA+
INA-
OUTA
MAX4393
µMAX
TOP VIEW
DISABLEBDISABLEA
14
13
12
11
10
9
8
1
2
3
4
5
6
7
DISABLEA OUTC
INC-
INC+
VEE
INB+
INB-
OUTB
TOP VIEW
MAX4394
SO/TSSOP
DISABLEC
DISABLEB
INA-
VCC
INA+
OUTA
1
2
3
4
8
7
6
5
VCC
OUTB
INB-
INB+VEE
INA+
INA-
OUTA
MAX4392
µMAX/SO
TOP VIEW
14
13
12
11
10
9
8
1
2
3
4
5
6
7
OUTD
IND-
IND+
VEE
VCC
INA+
INA-
OUTA
TOP VIEW
MAX4395
INC+
INC-
OUTCOUTB
INB-
INB+
SO/TSSOP
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
______________________________________________________________________________________ 13
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
DISABLED
OUTD
IND-
IND+INA+
INA-
OUTA
DISABLEA
TOP VIEW
VEE
INC+
INC-
OUTCOUTB
INB-
INB+
VCC
12
11
9
10
DISABLEC
N.C.N.C.
DISABLEB
MAX4396
TSSOP
Pin Configurations (continued) Ordering Information (continued)
PART TEMP RANGE PIN-
PACKAGE
TOP
MARK
MAX4392EUA -40°C to +85°C 8 µMAX —
MAX4392ESA -40°C to +85°C 8 SO —
MAX4393EUB -40°C to +85°C 10 µMAX —
MAX4394ESD -40°C to +85°C 14 SO —
MAX4394EUD -40°C to +85°C 14 TSSOP —
MAX4395ESD -40°C to +85°C 14 SO —
MAX4395EUD -40°C to +85°C 14 TSSOP —
MAX4396EUP -40°C to +85°C 20 TSSOP —
Selector Guide
PART NO. OF AMPS DISABLE
MAX4389 1 Yes
MAX4390 1 No
MAX4392 2 No
MAX4393 2 Yes
MAX4394 3 Yes
MAX4395 4 No
MAX4396 4 Yes
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
14 ______________________________________________________________________________________
6LSOT.EPS
Package Information
SC70, 6L.EPS
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
______________________________________________________________________________________ 15
Package Information (continued)
SOT5L.EPS
8LUMAXD.EPS
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and Disable
16 ______________________________________________________________________________________
Package Information (continued)
10LUMAX.EPS
SOICN.EPS
MAX4389/MAX4390/MAX4392–MAX4396
Ultra-Small, Low-Cost, 145MHz Op Amps with
Rail-to-Rail Outputs and 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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17
© 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information (continued)
TSSOP,NO PADS.EPS
