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參數(shù)資料
| 型號： | MAX4145ESD+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 3/16頁 |
| 文件大小： | 0K |
| 描述： | IC RX DIFF LINE HS 14-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 接收器 |
| 驅(qū)動器/接收器數(shù)： | 0/3 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOIC |
| 包裝： | 帶卷 (TR) |
MAX4144/MAX4145/MAX4146
High-Speed, Low-Distortion,
Differential Line Receivers
______________________________________________________________________________________
11
Do not use IC sockets—they increase parasitic
capacitance and inductance.
Use surface-mount power-supply bypass capacitors
instead of through-hole capacitors. Their shorter
lead lengths reduce parasitic inductance, leading to
superior high-frequency performance.
Keep signal lines as short and as straight as possi-
ble. Do not make 90° turns; round all corners.
The ground plane should be as free from voids as
possible.
Output Short-Circuit Protection
Under short-circuit conditions to ground, limit the out-
put current to 120mA. This level is low enough that a
short to ground of moderate duration will not cause per-
manent damage to the chip. However, a short to either
supply will significantly increase power dissipation, and
will cause permanent damage. The high output current
capability is an advantage in systems that transmit a
signal to several loads.
Input Protection Circuitry
The MAX4144/MAX4145/MAX4146 include internal pro-
tection circuitry that prevents damage to the precision
input stage from large differential input voltages. This
protection circuitry consists of five back-to-back
Schottky protection diodes between IN+ and RG+, and
IN- and RG- (Figure 1). The diodes limit the differential
voltage applied to the amplifiers’ internal circuitry to no
more than 10VF, where VF is the diode’s forward volt-
age drop (about 0.4V at +25°C).
For a large differential input voltage (exceeding 4V), the
MAX4145/MAX4146 input bias current (at IN+ and IN-)
increases according to the following equation:
The MAX4144 has an internal gain-setting resistor val-
ued at 1.4k
Ω. A differential input voltage as high as 10V
will cause only 4.3mA to flow—much less than the
10mA absolute maximum rating. However, in the
MAX4145/MAX4146, RG can be as low as 150Ω. Under
this condition, the absolute maximum input current rat-
ing might be exceeded if the differential input voltage
exceeds 5.5V (10mA x 150
Ω + 10VF). In that case,
510
Ω resistors can be placed at IN+ and IN- to limit the
current without degrading performance.
Shutdown Mode
The MAX4144/MAX4145/MAX4146 can be put into low-
power shutdown mode by bringing SHDN high. The
amplifier output is high impedance in this mode; thus
the impedance at OUT is that of the feedback resistors
(1.4k
Ω).
Setting Gain (MAX4145/MAX4146)
The MAX4145/MAX4146 ’s gain is determined by a sin-
gle external resistor, RG. The optimal gain range is from
+1V/V to +10V/V for the MAX4145 and +10V/V (RG =
open) to +100V/V for the MAX4146. The gain (in V/V) is
given in the following equations:
Input Current =
V
- V
- 10V
R
IN+
IN-
F
G
()
1.4k
IN+
IN-
IN+
IN-
RG-
RG+
MAX4144
MAX4145
MAX4146
Figure 1. Input Protection Circuits
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4146 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:High-Speed.Low-Distortion.Differential Line Receivers |
| MAX4146EEE | 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 |
| MAX4146EEE+ | 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 |
| MAX4146EEE+T | 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 |
| MAX4146EEE-T | 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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