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參數(shù)資料
| 型號： | MAX9547ESA+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC VIDEO INTERFACE DIFF 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 應(yīng)用： | 接收器 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 20MHz |
| 轉(zhuǎn)換速率： | 50 V/µs |
| 電流 - 電源： | 70mA |
| 電流 - 輸出 / 通道： | 21mA |
| 電壓 - 電源，單路/雙路(±)： | 7.5 V ~ 10 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm Width）裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 8-SO 裸露焊盤 |
| 包裝： | 管件 |
MAX9546/MAX9547
Differential Video Interface Chipset
_______________________________________________________________________________________
9
Common-Mode Balance
A driver is typically specified as having a property called
common-mode balance (CMB), longitudinal balance, or
simply line imbalance. Although balance is associated
with the source, it assumes a perfectly balanced, cor-
rectly terminated, differential load. Common-mode bal-
ance is a measure of the ratio between the differential to
the common-mode output in decibels as shown below.
Common-mode balance is dominated by the gain-band-
width product at high frequencies and the output resis-
tance at low frequencies; therefore, it is important to
specify CMB over a frequency range. The receiver-side
balance is determined by the common-mode rejection
ratio (CMRR). The CMRR is usually quite large compared
to the CMB; therefore, the CMB is the limiting factor.
Fault Protection and Detection
The MAX9546 fault protection insures the driver outputs
survive a short to any voltage from -2V to +16V and are
ESD-protected to ±15kV HBM. Faults are indicated by
an open-drain fault output (FAULT) being asserted low
and requires a pullup resistor from FAULT to VCC.
MAX9547
Receiver
The MAX9547 receiver is a differential-to-single-ended
converter that removes any common-mode input. The
unique architecture allows the signal gain to be set by
a ratio of two impedances: the user-selected transcon-
ductance element or network (ZZT), and an output load
resistance, RL. The gain is set by a fixed internal cur-
rent gain (K) and the ratio of ZZT and RL. The ZT termi-
nals can be bridged with a complex impedance to
provide lead-lag compensation.
The output is essentially a voltage-controlled current
source as shown in Figure 1. The MAX9547 output is a
current proportional to the differential input voltage, and
inversely proportional to the impedance of the user-
selected transconductance network, ZZT. The current
output provides inherent short-circuit protection for the
output terminal. A differential input voltage applied to the
input terminals causes current to flow in the transconduc-
tance element (ZZT), which is equal to VIN / ZZT. This cur-
rent in the transconductance element is multiplied by the
preset current gain (K) and appears on the output termi-
nal as a current equal to (K) x (VIN / ZZT). This current
flows through the load impedance to produce an output
voltage according to the following equation:
where K = current-gain ratio (K = 1 for MAX9547), RL =
output load impedance, ZZT = transconductance ele-
ment impedance, VIN = differential input voltage.
Loss-of-Signal
The receiver includes an LOS output to indicate a sig-
nal by detecting the presence of H-Sync. This allows
the MAX9547 to be used with monochrome or color
video. LOS is an open-drain output and requires a
pullup resistor from LOS to VCC.
Setting the Circuit Gain
The MAX9547 produces an output current by multiply-
ing the differential input voltage, VIN, by the transcon-
ductance ratio, K (RL / ZZT), where K = 1. The voltage
gain (AV) is set by the impedance of the transconduc-
tance network (ZZT) and the output load impedance
(RL) according to the following formula:
The factor ZZT is the impedance of the user-selected,
two-terminal transconductance element or network,
connected across the terminals labeled ZT+ and ZT-.
The network ZZT is selected, along with the output
impedance RL, to provide the desired circuit gain and
frequency shaping.
To maintain linearity, the transconductance network
should also be selected so that current flowing through
it, equal to VIN / ZZT, does not exceed 18mA under
worst-case conditions of maximum input voltage and
minimum transconductance element impedance (ZZT).
Output current should not exceed ±8.8mA except
under fault conditions.
AK
R
Z
V
L
ZT
=
VK
V
Z
R
OUT
IN
ZT
L
=
CMB
Log
OUT
=
+
() (
)
+
() + ()
20
2
Figure 1. Operational Mode
ZZT
K
VIN
IN+
IN-
IOUT
1
+
7
-
4
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相關(guān)代理商/技術(shù)參數(shù) |
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| MAX9547ESA+ | 功能描述:視頻放大器 Integrated Circuits (ICs) RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX9547ESA+T | 功能描述:視頻放大器 Integrated Circuits (ICs) RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX954C/D | 功能描述:特殊用途放大器 Ultra-Low-Power Single-Supply Op Amp + Comparator + Reference RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| MAX954C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX954C/D+ | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
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