MAX445 Maxim, MAX445 Datasheet
MAX445
Manufacturer Part Number
MAX445
Description
Low-Cost / High-Resolution / 200MHz Video CRT Driver
Manufacturer
Maxim
Datasheet
1.MAX445.pdf
(8 pages)
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The MAX445 is a high-performance, monolithic, variable-
gain transconductance amplifier with a high-voltage
open-collector output capable of directly driving a video
display (CRT cathode). A 2.5ns rise time is achieved
using a peaking network with a 200Ω load resistor and
an 8pF total load (CRT and parasitic capacitance).
Differential inputs and a linear adjustable gain stage
with an output offset adjustment make the versatile
MAX445 well suited for many video display applica-
tions. A buffered bandgap reference voltage is avail-
able for the gain (contrast) and offset adjustments
along with a TTL BLANK input to turn off the output cur-
rent, independent of signal input.
The MAX445 is available in a 24-pin power-tab DIP
package. A suitable heatsink must be attached to
maintain the junction temperature within the recom-
mended operating range.
________________________Applications
19-0302; Rev 0; 9/94
Call toll free 1-800-998-8800 for free samples or literature.
________________Functional Diagram
GNDA
VIN+
_______________General Description
VIN-
CRT Driver for High-Resolution Monochrome and
Color Displays
High-Voltage, Variable-Gain Transconductance
Amplifier
CONTRAST
PRE-AMP
OFFSET
________________________________________________________________ Maxim Integrated Products
BLANK
BAND
VREF
GAP
CURRENT
MAX445
Low-Cost, High-Resolution, 200MHz
AMP
IOUT
GND
V
AA
R
L
V
OUT
VCB
____________________________Features
* Case temperature range, T
**Dice are specified at T
__________________Pin Configuration
______________Ordering Information
MAX445CPG
MAX445C/D
Maximum Ratings and Applications Information for thermal/heat
sink considerations.
TOP VIEW
2.5ns Rise/Fall Time into an 8pF Load
200MHz Small-Signal Bandwidth
50Vp-p Output
Ground Referenced Differential Inputs
Linear Variable Gain for Contrast Control
Offset Adjustment for Black Level
5.5V Bandgap Reference
Drives 1280 x 1024 and 1530 x 1280 Displays
PART
CONTRAST
OFFSET
BLANK
GNDA
VREF
GND
VIN+
GND
VIN-
V
V
V
CC
EE
EE
Video CRT Driver
10
11
12
1
2
3
4
5
6
7
8
9
TEMP. RANGE
J
0°C to +70°C*
0°C to +70°C**
Power-Tab DIP
= +25°C, DC parameters only.
CASE
MAX445
= 0°C to +90°C. See Absolute
24
23
22
21
20
19
18
17
16
15
14
13
24 Power-Tab DIP
Dice
PIN-PACKAGE
GND
GND
N.C.
IOUT
N.C.
VCB
VCB
GND
GND
V
GND
GND
EEO
1
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