|
|
PDF MAX499 Data sheet ( Hoja de datos )
| Número de pieza | MAX499 | |
| Descripción | Quad/Triple / SPDT / RGB Switches with 250MHz Video Buffer Amplifiers | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX499 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
19-1143; Rev 0; 10/96
EVAALVUAAILTAIOBNLEKIT
Quad/Triple, SPDT, RGB Switches
with 250MHz Video Buffer Amplifiers
_______________General Description
The MAX498/MAX499 are high-speed, quad/triple, sin-
gle-pole/double-throw video switches with on-board
closed-loop buffer amplifiers. The buffer amplifiers fea-
ture +6dB gain (AVCL = 2V/V), 250MHz -3dB band-
width, 70MHz 0.1dB gain flatness, and 1250V/µs slew
rate. Fast switching time (3ns) and fast settling time
(12ns for a 4V step) make these devices excellent
choices for a wide variety of video applications. The low
differential gain/phase errors (0.03%/0.06°) and wide
bandwidth make them ideal for both composite-video
and RGB applications. The amplifiers are capable of
delivering ±2.5V into back-terminated 50Ω or 75Ω
cables, and they deliver ±2V to a 75Ω load, allowing
multiple cables to be driven from a single output.
For implementation of large switch arrays, a low-power
disable mode places the amplifier outputs in a high-
impedance state. Channel selection and output
enable/disable are controlled by four TTL/CMOS-
compatible logic inputs. Each video input is isolated by
an AC-ground pin, which minimizes channel-to-channel
capacitance and reduces crosstalk to 90dB at 10MHz.
The four-channel MAX498 dissipates 390mW (typical)
from ±5VDC power supplies with all output buffers
enabled. Power consumption is reduced to 130mW with
all buffers disabled. The corresponding dissipation for
the three-channel MAX499 is 300mW enabled and
100mW disabled.
________________________Applications
Video Switching and Routing
Broadcast-Quality Composite-Video Multiplexing
Workstations
Video Editing
Broadcast and High-Definition TV Systems
Multimedia Products
Medical Imaging
____________________________Features
o High Speed:
250MHz Small-Signal -3dB Bandwidth
135MHz Full-Power -3dB Bandwidth
o 70MHz 0.1dB Gain Flatness
o 1250V/µs Slew Rate
o 12ns to 0.1% Settling Time
o 0.03°/0.06% Differential Phase/Gain Error
o 2pF Input Capacitance
o 3ns Channel-Switching Time
o 120mVp-p Channel-Switching Transient
o Three-State Output Allows Large Switch Arrays
o Directly Drives 50Ω or 75Ω Back-Terminated
Cables
______________Ordering Information
PART
MAX498CWI
MAX499CWG
TEMP. RANGE
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
28 SO
24 SO
_________________Pin Configurations
TOP VIEW
IN1A 1
GND 2
IN2A 3
GND 4
IN3A 5
VCC 6
VEE 7
IN1B 8
GND 9
IN2B 10
GND 11
IN3B 12
MAX499
24 GND
23 LE
22 EN
21 A0
20 CS
19 OUT1
18 VCC
17 VEE
16 OUT2
15 N.C.
14 OUT3
13 N.C.
SO
MAX498 appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
1 page  
Quad/Triple, SPDT, RGB Switches
with 250MHz Video Buffer Amplifiers
____________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, RL = 100Ω, TA = +25°C, unless otherwise noted.)
MAX498
SUPPLY CURRENT
vs. TEMPERATURE
50
45
ICC
40
IEE
35
30
-55 -35 -15 5 25 45 65 85
TEMPERATURE (°C)
DISABLED SUPPLY CURRENT
vs. TEMPERATURE
15
EN = HIGH (OUTPUTS DISABLED)
14
13
ICC
12
11
10 IEE
9
8
-55 -35 -15 5 25 45 65 85
TEMPERATURE (°C)
2.0200
GAIN vs. TEMPERATURE
2.0175
2.0150
VIN = +1V
VIN = -1V
2.0125
2.0100
-55 -35 -15 5 25 45 65 85
TEMPERATURE (°C)
+1
IN 0
-1
12
10
8
6
4
2
0
-2
-4
-6
-8
-10
-12
-55
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
-35 -15 5 25 45 65
TEMPERATURE (°C)
85
INPUT BIAS CURRENT
vs. TEMPERATURE
10
8
6
4
2
0
-2
-4
-6
-8
-10
-55 -35 -15 5 25 45
TEMPERATURE (°C)
65
85
LARGE-SIGNAL
PULSE RESPONSE
LARGE-SIGNAL
PULSE RESPONSE (CL = 47pF)
LARGE-SIGNAL
PULSE RESPONSE (CL = 100pF)
+1
IN 0
-1
+1
IN 0
-1
+2
OUT 0
-2
TIME (10ns/div)
+2
OUT 0
-2
TIME (10ns/div)
+2
OUT 0
-2
TIME (10ns/div)
_______________________________________________________________________________________ 5
5 Page 
Quad/Triple, SPDT, RGB Switches
with 250MHz Video Buffer Amplifiers
MAX186/MAX188
FULL POWER-DOWN
14
RISO = 0Ω
12
100pF
10
8
47pF
6
4 0pF
2
0
-2
-4
-6
1M
10M 100M
FREQUENCY (Hz)
1G
MAX186/MAX188
FULL POWER-DOWN
14
RISO = 6.8Ω
12
10 150pF
8
100pF
47pF
6
4 0pF
2
0
-2
-4
-6
1M
10M 100M
FREQUENCY (Hz)
1G
Figure 3a. Small-Signal Gain vs. Frequency and Load
Capacitor (RL = 100Ω, RISO = 0Ω)
Figure 3b. Small-Signal Gain vs. Frequency and Load
Capacitor (RL = 100Ω, RISO = 6.8Ω)
+1
VIN -1
+2
VOUT
-2
+100
VIN
-100
+200
VOUT
-200
TIME (10ns/div)
TIME (10ns/div)
Figure 4a. Large-Signal Pulse Response with CL = 100pF and
RISO = 5.1Ω
Coaxial Cable Drivers
High-speed performance, excellent output current
capability, and an internally fixed gain of +2 make the
MAX498/MAX499 ideal for driving back-terminated 50Ω
or 75Ω coaxial cables to ±2.5V.
In a typical application, the MAX498/MAX499 drive a
back-terminated cable (Figure 1). The back-termination
resistor, at the output, matches the impedance of the
cable’s driven end to the cable’s impedance, eliminating
signal reflections. This resistor, along with the load-
termination resistor, forms a voltage divider with the load
impedance, which attenuates the signal at the cable’s
output by one-half. The MAX498/MAX499 operate with
an internal +2V/V closed-loop gain to provide unity gain
at the cable’s output.
Figure 4b. Small-Signal Pulse Response with CL = 100pF and
RISO = 5.1Ω
Capacitive-Load Driving
In most amplifier circuits, driving large capacitive loads
increases the likelihood of oscillation. This is especially
true for circuits with high loop gains, such as voltage
followers. The amplifier’s output resistance and the
capacitive load form an RC filter that adds a pole to the
loop response. If the pole frequency is low enough (as
when driving a large capacitive load), the circuit-phase
margin is degraded and oscillation may occur.
The MAX498/MAX499 drive capacitive loads up to
100pF without sustained oscillation, although some
peaking may occur (Figures 3a and 3b). When driving
larger capacitive loads, or to reduce peaking, add an
isolation resistor (RISO) between the output and the
capacitive load (Figures 4a, 4b, and 5).
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MAX499.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX490 | Low-Power / Slew-Rate-Limited RS-485/RS-422 Transceivers | Maxim Integrated |
| MAX4901 | Low-RON & Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability |  Maxim Integrated Products |
| MAX4902 | Low-RON & Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability | Maxim Integrated Products |
| MAX4903 | Low-RON & Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability | Maxim Integrated Products |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |