View MAX4027ESD_264037.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-2987; Rev 0; 9/03
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier
General Description
The MAX4027 is a triple, wideband, 2-channel, noninverting gain-of-two video amplifier with input multiplexing, capable of driving up to two back-terminated video loads. The MAX4027 features current-mode feedback amplifiers configured for a gain of two (+6dB) with a -3dB large-signal bandwidth of 200MHz. The device has low (0.012%/0.014) differential gain and phase errors, and operates from 5V supplies. The MAX4027 is ideal for use in broadcast and graphics video systems because of the low 2pF input capacitance, channel-to-channel switching time of only 15ns, and wide 62MHz, large-signal 0.1dB bandwidth. Highimpedance output disabling allows the MAX4027 to be incorporated into large switching arrays with minimal interaction with the source. Specified over the -40C to +85C extended temperature range, the MAX4027 is available in 14-pin SO and TSSOP packages.
Features
o Excellent Video Specifications: 75MHz Small-Signal 0.1dB Gain Flatness 62MHz Large-Signal 0.1dB Gain Flatness 0.012%/0.014 Differential Gain/Phase Error o VGA to UXGA Resolution o High Speed: 200MHz 2VP-P -3dB Bandwidth 1100V/s Slew Rate 15ns Settling Time to 0.1% o Internal Gain of 2V/V Compensates for Output Back Termination o Fast Switching: 15ns Channel-Switching Time 260mVP-P Switching Transient o Drives Two Back-Terminated Video Loads o High-Impedance Output Disable
MAX4027
Applications
Video Source Selection (Multiplexing) Picture in Picture (PIP) Insertion Crosspoint Expansion Coaxial Cable Drivers Supports VGA to UXGA (1600 x 1200) Resolution Enterprise Class (Blade) Servers Keyboard-Video-Mouse (KVM)
Ordering Information
PART MAX4027ESD MAX4027EUD TEMP RANGE -40C to +85C -40C to +85C PIN-PACKAGE 14 SO 14 TSSOP
Typical Operating Circuit
TOP VIEW MAX4027
VIDEO R SOURCE G 1 B x2 IN1A IN2A IN3A IN1B IN2B IN3B OUT1 R IN1A 1 IN2A TRIPLE 2:1 MUX IN3A x2 OUT2 G 2 3
Pin Configuration
14 A/B 13 OUT1 12 VCC
GND 4 IN1B 5
MAX4027
11 OUT2 10 VEE 9 8 OUT3 EN
VIDEO R SOURCE G 2 B
x2
OUT3
B
IN2B 6 IN3B 7
SO/TSSOP
A/B EN
________________________________________________________________ Maxim Integrated Products
1
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.
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier MAX4027
ABSOLUTE MAXIMUM RATINGS
Positive Supply Voltage (VCC to GND) ..................................+6V Negative Supply Voltage (VEE to GND) ..................................-6V Amplifier Input Voltage (IN_ _) .........(VEE - 0.3V) to (VCC + 0.3V) Digital Input Voltage (EN, A/B) ...................-0.3V to (VCC + 0.3V) Output Short Circuit to GND (Note 1).........................Continuous Output Short Circuit to VCC or VEE ...........................................5s Note 1: Continuous power-dissipation rating must also be observed.
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.
Continuous Power Dissipation (TA = +70C) 14-Pin TSSOP (derate 9.1mW/C above +70C) .........727mW 14-Pin SO (derate 8.3mW/C above +70C)................667mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Junction Temperature .....................................................+150C Lead Temperature (soldering, 10s) .................................+300C
DC ELECTRICAL CHARACTERISTICS
(VCC = 5V, VEE = -5V, VIN_ _ = 0V, RL = 150 to GND, TA = -40C to +85C. Typical values are at TA = +25C.) (Note 2)
PARAMETER Operating Supply Voltage Range Positive Supply Current Negative Supply Current Input Voltage Range Input Offset Voltage Input Offset-Voltage Matching Voltage Gain Input Offset-Voltage Temperature Coefficient Input Bias Current Input Resistance DC Output Resistance Disabled Output Resistance DC Power-Supply Rejection Ratio Output Voltage Swing Output Short-Circuit Current LOGIC CHARACTERISTICS (EN, A/B) Logic-Low Threshold Logic-High Threshold Logic-Low Input Current Logic-High Input Current VIL VIH IIL IIH VIL = 0V VIH = +5.5V, VCC = +5.5V 2.0 -4 350 -20 600 0.8 V V A A SYMBOL VCC VEE ICC IEE VIN_ _ VOS VOS AV TCVOS IB RIN ROUT ROUT(d) PSRR VOUT_ ISC EN = 5V, VOUT_ = -2.5V to +2.5V (Note 3) VCC = +4.5V to +5.5V, VEE = -4.5V to -5.5V 60 2.5 TA = +25C TA = -40C to +85C VIN_ _ = -1.25V to +1.25V Channel on Channel off 100 1 400 20 10 1.6 86 3.5 143 CONDITIONS Inferred from the PSRR test EN = GND EN = 5V EN = GND EN = 5V Inferred from voltage gain TA = +25C TA = -40C to +85C Channel to channel VOUT_ = 2.5V 1.9 1 2.0 1 2 10 18 1.25 MIN +4.5 -4.5 TYP +5.0 -5.0 31 17 28 15 1.75 1 6 11 12 2.1 MAX +5.5 -5.5 39 24 36 21 UNITS V mA mA V mV mV V/V V/C A k M m k dB V mA
2
_______________________________________________________________________________________
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier
AC ELECTRICAL CHARACTERISTICS
(VCC = 5V, VEE = -5V, VIN_ _ = 0V, RIN = 75 to GND, RL = 150 to GND, TA = +25C, unless otherwise noted.)
PARAMETER AMPLIFIER CHARACTERISTICS Small-Signal -3dB Bandwidth Small-Signal Bandwidth for 0.1dB Gain Flatness Large-Signal -3dB Bandwidth Large-Signal Bandwidth for 0.1dB Gain Flatness Slew Rate Settling Time to 0.1% Differential Gain Error Differential Phase Error Delay Between Channels Channel-to-Channel Crosstalk A/B Crosstalk Output Impedance Total Harmonic Distortion Off-Isolation Output Capacitance Input Capacitance Input-Voltage Noise Density Input-Current Noise Density SWITCHING CHARACTERISTICS Channel-Switching Time Enable Delay Time Disable Delay Time Switching Transient tSW tPDE tPDD VTRAN (Notes 5, 6) (Notes 5, 7) (Notes 5, 7) (Note 8) 15 20 25 260 ns ns ns mVP-P ZOUT THD AISO COUT CIN en in BWSS VIN_ _ = 20mVP-P 225 75 200 62 1100 15 0.012 0.014 0.1 -61 -80 1 64 -83 3 2 6.5 6.5 MHz MHz MHz MHz V/s ns % degrees ns dB dB dBc dB pF pF nV/Hz pA/Hz SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4027
BWLS(0.1) VIN_ _ = 20mVP-P BWLS VIN_ _ = 1VP-P
BWLS(0.1) VIN_ _ = 1VP-P SR tS DG DP tD XTALK VIN_ _ = 1VP-P VIN_ _ = 1VP-P 5-step modulated staircase (Note 4) 5-step modulated staircase (Note 4) VIN_ _ = 1VP-P, tR = 100ps VIN_ _ = 1VP-P, f = 10MHz VIN_ _ = 1VP-P, f = 10MHz f = 10MHz VOUT_ = 2VP-P, f = 10MHz VOUT_ = 2VP-P, f = 10MHz, RS = 75 Channel on or off Channel on or off f = 100kHz f = 100kHz
Note 2: Note 3: Note 4: Note 5: Note 6:
Limits are 100% production tested at TA = +25C. Limits over the operating temperature range are guaranteed by design. Disabled output resistance includes the internal feedback network. Input test signal is NTSC composite with 5-step staircase, of 40 IRE per step, modulated with 3.58MHz color subcarrier. See the Timing Diagram (Figure 2). Channel-switching time specified for switching between input channels; does not include signal rise/fall times for switching between channels with different input voltages. Note 7: Output enable/disable delay times do not include amplifier output slewing times. Note 8: Switching transient measured while switching between two grounded channels.
_______________________________________________________________________________________
3
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier MAX4027
Typical Operating Characteristics
(VCC = +5V, VEE = -5V, RL = 150 to GND, TA = +25C, unless otherwise noted.)
SMALL-SIGNAL GAIN FLATNESS vs. FREQUENCY
MAX4027 toc01 MAX4027 toc02
SMALL-SIGNAL FREQUENCY RESPONSE
3 2 1 0 GAIN (dB) GAIN (dB) -1 -2 -3 -4 -5 -6 -7 1M 10M 100M 1G FREQUENCY (Hz) VIN_ _ = 20mVP-P AV = +2V/V 0.3 0.2 0.1 0
LARGE-SIGNAL FREQUENCY RESPONSE
2 1 0 GAIN (dB) -1 -2 -3 -4 -5 -6 -7 VOUT_ = 4VP-P VOUT_ = 2VP-P AV = +2V/V
MAX4027 toc03
3
VIN_ _ = 20mVP-P AV = +2V/V
-0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 1M 10M 100M 1G FREQUENCY (Hz)
1M
10M
100M
1G
FREQUENCY (Hz)
DIFFERENTIAL GAIN (%)
LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY
MAX4027 toc04
CHANNEL-TO-CHANNEL GAIN MATCHING vs. FREQUENCY
CHANNEL-TO-CHANNEL GAIN MATCHING (dB) 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 1M 10M FREQUENCY (Hz) 100M VOUT_ = 2VP-P
MAX4027 toc05
DIFFERENTIAL GAIN AND PHASE
0.010 0 -0.010 -0.020 1st 0.020 0.010 0 -0.010 -0.020 1st 2nd 3rd 4th 5th 6th 2nd 3rd 4th 5th 6th
MAX4027 toc06
0.3 0.2 0.1 0 GAIN (dB) -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 1M 10M 100M VOUT_ = 4VP-P VOUT_ = 2VP-P AV = +2V/V
0.5
0.020
1G
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX4027 toc07
DIFFERENTIAL PHASE (DEG)
OFF-ISOLATION vs. FREQUENCY
MAX4027 toc08
CHANNEL-TO-CHANNEL CROSSTALK vs. FREQUENCY
-10 -20 CROSSTALK (dB)
MAX4027 toc09
-20 -25 -30 -35 PSRR (dB) -40 -45 PSRR-50 -55 -60 -65 100k 1M 10M
0 -20 OFF-ISOLATION (dB) -40 -60 -80 -100
0
-30 -40 -50 -60 -70 -80
PSRR+ -120 100M 1M 10M 100M 1G FREQUENCY (Hz) FREQUENCY (Hz) 100k 1M 10M FREQUENCY (Hz) 100M 1G
4
_______________________________________________________________________________________
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, RL = 150 to GND, TA = +25C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION vs. FREQUENCY
MAX4027 toc11
MAX4027
A/B CROSSTALK vs. FREQUENCY
MAX4027 toc10
OUTPUT IMPEDANCE vs. FREQUENCY
100 -20
VOUT_ = 2VP-P -30 -40 THD (dBc) -50 -60 -70 -80
-20 CROSSTALK (dB) -40 -60 -80 -100 -120 100k 1M 10M FREQUENCY (Hz) 100M
OUTPUT IMPEDANCE ()
10
1
0.1
0.01 1G 100k 1M 10M FREQUENCY (Hz) 100M 1G
-90 1M 10M FREQUENCY (Hz) 100M
LARGE-SIGNAL PULSE RESPONSE
MAX4027 toc13
SMALL-SIGNAL PULSE RESPONSE
MAX4027 toc14
LARGE-SIGNAL PULSE RESPONSE (CLOAD = 20pF)
MAX4027 toc15
VIN_ _ 500mV/div 0V
VIN_ _ 50mV/div 0V
VIN_ _ 500mV/div 0V
VOUT_ 1V/div 0V
VOUT_ 100mV/div 0V
VOUT_ 1V/div 0V
10ns/div
10ns/div
10ns/div
SMALL-SIGNAL PULSE RESPONSE (CLOAD = 20pF)
ENABLE RESPONSE TIME
MAX4027 toc17
A/B SWITCHING TRANSIENT
MAX4027 toc18
MAX4027 toc16
VIN_ _ 50mV/div 0V
EN 2.5V/div 0V
A/B 2.5V/div 0V
VOUT_ 100mV/div 0V
VOUT_ 1V/div 0V
VOUT_ 100mV/div
MAX4027 toc12
0
0V
10ns/div
20ns/div
20ns/div
_______________________________________________________________________________________
5
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier MAX4027
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, RL = 150 to GND, TA = +25C, unless otherwise noted.)
INPUT BIAS CURRENT vs. TEMPERATURE
MAX4027 toc19 MAX4027 toc20
SUPPLY CURRENT vs. TEMPERATURE
35 34 33 SUPPLY CURRENT (mA) 32 31 30 29 28 27 26 25 -50 -25 0 25 50 75 100 TEMPERATURE (C) 5.0 4.5 INPUT BIAS CURRENT (A) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -50 -25
POSITIVE OUTPUT SWING vs. TEMPERATURE
MAX4027 toc21
5.0
POSITIVE OUTPUT SWING (V)
4.5
4.0
3.5
3.0
2.5 0 25 50 75 100 -50 -25 0 25 50 75 100 TEMPERATURE (C) TEMPERATURE (C)
NEGATIVE OUTPUT SWING vs. TEMPERATURE
MAX4027 toc22
INPUT OFFSET VOLTAGE vs. TEMPERATURE
3 2
MAX4027 toc23
-2.5
4
NEGATIVE OUTPUT SWING (V)
-3.0 RLOAD = 50 RLOAD = 150 -4.0 NO LOAD -4.5
VOS (mV) 75 100
-3.5
1 0 -1 -2 -3
-5.0 -50 -25 0 25 50 TEMPERATURE (C)
-4 -50 -25 0 25 50 75 100 TEMPERATURE (C)
OUTPUT SHORT-CIRCUIT CURRENT vs. TEMPERATURE
MAX4027 toc24
SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
2 1 0 GAIN (dB) -1 -2 -3 -4 -5 5pF 0pF 10pF VIN_ _ = 20mVP-P AV = +2V/V 15pF
MAX4027 toc25
160 OUTPUT SHORT-CIRCUIT CURRENT (mA) SOURCING AND SINKING 155 150 145 140 135 130 125 -50 -25 0 25 50 75
3
-6 -7 100 1M 10M 100M 1G TEMPERATURE (C) FREQUENCY (Hz)
6
_______________________________________________________________________________________
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 NAME IN1A IN2A IN3A GND IN1B IN2B IN3B EN OUT3 VEE OUT2 VCC OUT1 A/B Amplifier 1 Channel A Input Amplifier 2 Channel A Input Amplifier 3 Channel A Input Power Supply, Analog and Digital Ground. Connect GND to ground plane for best RF performance. Amplifier 1 Channel B Input Amplifier 2 Channel B Input Amplifier 3 Channel B Input Output Enable Logic Input. Drive EN low or leave open for normal operation. Pull EN high to disconnect amplifier output (output is high impedance when disabled). EN is internally pulled to GND through a 17k resistor. Amplifier Output 3 Negative Power-Supply Voltage. Bypass VEE to GND with a 0.1F capacitor. Amplifier Output 2 Positive Power-Supply Voltage. Bypass VCC to GND with a 0.1F capacitor. Amplifier Output 1 Channel-Select Input. Drive A/B low or leave open to select channel A for all amplifiers. Pull A/B high to select channel B for all amplifiers. A/B is internally pulled to GND through a 17k resistor. FUNCTION
MAX4027
Detailed Description
The MAX4027 combines three 2:1 multiplexers with +2V/V (+6dB) closed-loop gain (AVCL) amplifiers. This low-power, high-speed device operates from 5V supplies, while driving up to two back-terminated video loads with very low distortion. Differential gain and phase errors are 0.012%/0.014 for the MAX4027. The input multiplexers feature fast 15ns channelswitching times and small switching transients. The multiplexers also feature high input resistance and constant input capacitance, so overall input impedance can be set by external input-terminating resistors. Drive EN high to place the amplifier outputs in a highimpedance state, and minimize the supply current. This function allows use of multiple mux/amps in parallel to form large switching arrays. The MAX4027 features an A/B input, which selects either channel A or B. Drive A/B low to select channel A or drive A/B high to select channel B. Channel A is automatically selected if A/B is left unconnected.
Truth Tables
Table 1. Input Control Logic
A/B 0 1 AMPLIFIER INPUT IN_A IN_B FUNCTION Channel A Selected Channel B Selected
Table 2. Output Control Logic
EN 0 1 AMPLIFIER OUTPUT On Off FUNCTION Outputs Enabled Outputs High Impedance
Applications Information
Disable Mode
Drive EN high to place the MAX4027 in disable mode. Placing the device in disable mode reduces the quiescent current to 17mA (VCC) and 15mA (VEE) and places the amplifier outputs into a high-impedance state, typi-
_______________________________________________________________________________________
7
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier
cally 1.6k. Parallel multiple devices to construct larger switch matrices by connecting the outputs of several devices together and disabling all but one of the paralleled amplifiers' outputs. Two internal 800 thin-film resistors set the MAX4027 to a fixed gain of +2. Consider the impedance of the internal feedback resistors when operating multiple MAX4027s in large multiplexer applications. Drive EN low for normal operation. EN has internal pulldown circuitry. The MAX4027 is enabled when EN is unconnected.
MAX4027
Layout and Power-Supply Bypassing
The MAX4027 has an extremely high bandwidth and requires careful board layout. For best performance, use constant-impedance microstrip or stripline techniques. To realize the full AC performance of these high-speed amplifiers, pay careful attention to power-supply bypassing and board layout. The PC board should have at least two layers: a signal and power layer on one side, and a large, low-impedance ground plane on the other side. The ground plane should be as free of voids as possible. With multilayer boards, locate the ground plane on an internal layer that incorporates no signal or power traces. Observe the following guidelines when designing the board regardless of whether or not a constant-impedance board is used. 1) Do not use wire-wrap boards or breadboards. 2) Do not use IC sockets; they increase parasitic capacitance and inductance. 3) Keep lines as short and as 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. 5) Use surface-mount components. They generally have shorter bodies and lower parasitic reactance, yielding better high-frequency performance than through-hole components. The bypass capacitors should include a 0.1F ceramic surface-mount capacitor between each supply pin and the ground plane, located as close to the package as
Video Line Driver
The MAX4027 is well suited to drive short coaxial transmission lines when the cable is terminated at both ends (Figure 1) where the fixed gain of +2 compensates for the loss in the back termination. Cable frequency response may cause variations in the flatness of the signal.
Input Voltage Range
The guaranteed input voltage range is 1.25V. Exceeding this value can cause unpredictable results, including output clipping, excessive input current, and switching delays.
Multiplexer
The input multiplexer (mux) is controlled by a 3.3V TTL/CMOS-compatible control input (see the Truth Tables). Input capacitance is a constant, low 2pF and input resistance is 17k to GND for all input channels, regardless of whether or not the channel is selected. All logic levels (EN and A/B) default low if left unconnected.
A/B 75 CABLE IN_A RT 75 75 CABLE IN_B RT 75
EN RT 75 75 CABLE RT 75
OUT_
MAX4027
Figure 1. Video Line Driver 8 _______________________________________________________________________________________
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier
possible. Optionally, place a 10F tantalum capacitor at the power-supply pins' points of entry to the PC board to ensure the integrity of incoming supplies. The power-supply trace should lead directly from the tantalum capacitor to the VCC and VEE pins. Use surface-mount resistors for input termination and output back termination. Place the termination resistors as close to the IC as possible.
Functional Diagram
A/B VCC
MAX4027
IN1A MUX1 IN1B
EN OUT1
TO A/B TO EN MUX2 IN2B A/B OUT2
IN2A
tSW OUT CHANNEL A CHANNEL B
tSW CHANNEL A IN3A
TO A/B TO EN MUX3 IN3B OUT3
EN tPDD HIGH IMPEDANCE VEE tPDE
MAX4027
GND
OUT
Figure 2. Switching Timing Diagram
Chip Information
TRANSISTOR COUNT: 870 PROCESS: Bipolar
_______________________________________________________________________________________
9
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier MAX4027
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.)
SOICN .EPS
INCHES DIM A A1 B C e E H L MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050
MILLIMETERS MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 1.27
N
E
H
VARIATIONS:
1
INCHES
MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC
TOP VIEW
DIM D D D
MIN 0.189 0.337 0.386
MAX 0.197 0.344 0.394
D C
A e B A1
0 -8 L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL DOCUMENT CONTROL NO. REV.
21-0041
B
1 1
10
______________________________________________________________________________________
225MHz, Triple, 2-Channel Video Multiplexer-Amplifier
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.)
TSSOP4.40mm.EPS
MAX4027
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 ____________________ 11 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX4027ESD

	To Download MAX4027ESD Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .