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參數(shù)資料
| 型號(hào)： | MAX4029EWP+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 11/13頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP VIDEO MUX 2:1 20-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 應(yīng)用： | 2:1 多路復(fù)用器-放大器 |
| 電路數(shù)： | 4 |
| -3db帶寬： | 210MHz |
| 轉(zhuǎn)換速率： | 300 V/µs |
| 電流 - 電源： | 38mA |
| 電流 - 輸出 / 通道： | 30mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SOIC W |
| 包裝： | 帶卷 (TR) |
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Detailed Description
The MAX4028/MAX4029 are 5V, triple/quad, 2:1 voltage-
feedback multiplexer-amplifiers with input clamps and a
fixed gain of +2V/V (6dB). Channel 1 (IN1A and IN1B)
inputs are clamped to the video sync tip of the input
IN1_ channel, while the remaining inputs can be
clamped to either the video sync tip of the respective
input channel (IN_A and IN_B) or the video sync of
channel 1 (IN1_). The latter is referred to as a key
clamp and is pin selectable. Selectable clamp/key-
clamp inputs and fixed-gain video output buffers make
the MAX4028/MAX4029 ideal for video-source switching
applications such as automotive entertainment systems,
video projectors, and displays/TVs. Both devices have
20ns channel switching times and low ±10mVP-P switch-
ing transients, making them ideal for both high-speed
video switching applications such as OSD insertion.
The MAX4028/MAX4029 have a -3dB large-signal (2VP-P)
bandwidth of 130MHz, a -3dB small-signal bandwidth of
210MHz, and a 300V/s slew rate. Low differential gain
and phase errors of 0.2% and 0.4°, respectively, make
these devices ideal for broadcast video applications.
Sync Tip and Key Clamps
The MAX4028/MAX4029 have AC-coupled inputs, with
either a sync tip or key clamp to provide bias for the
video signal. Channel 1 of the MAX4028/MAX4029
always has a sync tip clamp at the input, while the
remaining channels are selectable as either sync tip or
key clamps to accommodate the various video wave-
forms (see the Clamp/Key-Clamp Settings for Video
Formats section). The value of the sync-tip clamp voltage
is set internally for the lowest value, consistent with linear
operation, and cannot be adjusted. The key-clamp volt-
age is adjustable, to compensate for variations in the
voltage between component video inputs such as Linear
RGB, YPbPr, and Y-C, by varying RKEYREF. The key-
clamp voltage can be computed from:
VKey-Clamp = 0.40 + 2000/[(5000 x RKEYREF) /
(5000 + RKEYREF)]
MAX4028/MAX4029
Triple/Quad, 2:1 Video
Multiplexer-Amplifiers with Input Clamps
_______________________________________________________________________________________
7
Pin Description (continued)
PIN
MAX4028
MAX4029
NAME
FUNCTION
15
18
OUT1
Amplifier Output 1
16
19
DISABLE
Disable Input. Pull
DISABLE high for normal operation. Drive DISABLE low to disable
all outputs.
—20
CLAMP/
KEY_4
Output 4 Clamp or Key-Clamp Input. Drive CLAMP/
KEY_4 high to clamp OUT4.
Drive CLAMP/
KEY_4 low to key clamp OUT4.
MAX4029
IN1A
OUT1
CLAMP
VCC
1k
1k
IN1B
CLAMP
IN2A
IN2B
OUT2
DISABLE
CLAMP/KEY_2
1k
1k
KEYREF
CLAMP
VOLTAGE
CLAMP/
KEY
CLAMP
CLAMP/
KEY
CLAMP
IN3A
IN3B
OUT3
CLAMP/KEY_3
1k
1k
CLAMP/
KEY
CLAMP
CLAMP/
KEY
CLAMP
IN4A
A/B
IN4B
GND
OUT4
CLAMP/KEY_4
1k
1k
CLAMP/
KEY
CLAMP
CLAMP/
KEY
CLAMP
Figure 1. MAX4029 Functional Diagram
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