參數(shù)資料
型號(hào)： SA5211D
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 通信及網(wǎng)絡(luò)
英文描述： Transimpedance amplifier 180MHz
中文描述： SPECIALTY TELECOM CIRCUIT, PDSO14
封裝： PLASTIC, SO-14
文件頁(yè)數(shù)： 15/20頁(yè)
文件大?。?/td> 172K
代理商： SA5211D
Philips Semiconductors
Product specification
SA5211
Transimpedance amplifier (180MHz)
1998 Oct 07
15
INPUT
OUT–
OUT+
PHOTODIODE
VB2
+
+
R
1
R
3
R
12
R
13
R
5
R
4
R
7
R
14
R
15
Q
1
Q
3
Q
2
Q
4
Q
15
Q
16
Q
11
Q
12
GND
2
GND
1
V
CC2
V
CC1
R
2
SD00328
Figure 12. Transimpedance Amplifier
V
CC
V
EQ3
V
IN
I
IN
INPUT
I
F
I
B
Q1
Q2
Q3
R2
R3
R4
R
F
R1
I
C1
SD00329
Figure 13. Shunt-Series Input Stage
APPLICATION INFORMATION
Package parasitics, particularly ground lead inductances and
parasitic capacitances, can significantly degrade the frequency
response. Since the SA5211 has differential outputs which can feed
back signals to the input by parasitic package or board layout
capacitances, both peaking and attenuating type frequency
response shaping is possible. Constructing the board layout so that
Ground 1 and Ground 2 have very low impedance paths has
produced the best results. This was accomplished by adding a
ground-plane stripe underneath the device connecting Ground 1,
Pins 8–11, and Ground 2, Pins 1 and 2 on opposite ends of the
SO14 package. This ground-plane stripe also provides isolation
between the output return currents flowing to either V
CC2
or Ground
2 and the input photodiode currents to flowing to Ground 1. Without
this ground-plane stripe and with large lead inductances on the
board, the part may be unstable and oscillate near 800MHz. The
easiest way to realize that the part is not functioning normally is to
measure the DC voltages at the outputs. If they are not close to their
quiescent values of 3.3V (for a 5V supply), then the circuit may be
oscillating. Input pin layout necessitates that the photodiode be
physically very close to the input and Ground 1. Connecting Pins 3
and 5 to Ground 1 will tend to shield the input but it will also tend to
increase the capacitance on the input and slightly reduce the
bandwidth.
As with any high-frequency device, some precautions must be
observed in order to enjoy reliable performance. The first of these is
the use of a well-regulated power supply. The supply must be
capable of providing varying amounts of current without significantly
changing the voltage level. Proper supply bypassing requires that a
good quality 0.1
μ
F high-frequency capacitor be inserted between
V
CC1
and V
CC2
, preferably a chip capacitor, as close to the package
pins as possible. Also, the parallel combination of 0.1
μ
F capacitors
with 10
μ
F tantalum capacitors from each supply, V
CC1
and V
CC2
, to
the ground plane should provide adequate decoupling. Some
applications may require an RF choke in series with the power
supply line. Separate analog and digital ground leads must be
maintained and printed circuit board ground plane should be
employed whenever possible.
Figure 14 depicts a 50Mb/s TTL fiber-optic receiver using the
BPF31, 850nm LED, the SA5211 and the SA5214 post amplifier.
相關(guān)PDF資料
PDF描述
SA5211 Transimpedance amplifier 180MHz
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SA5211D,602 功能描述:特殊用途放大器 180 MHZ TRANSIMPEDANCE AMP 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
SA5211D/01,112 功能描述:特殊用途放大器 TRANSIMP AMP 180MHZ 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
SA5211D/01,118 功能描述:跨阻抗放大器 TRANSIMPEDANCE AMP (180 MHZ) RoHS:否 制造商:Texas Instruments 封裝 / 箱體:SOIC-14 帶寬:3 MHz 工作電源電壓:36 V 電源電流:5.5 mA 工作溫度范圍:- 40 C to + 85 C 封裝:Tube
SA52-11EWA 功能描述:LED 顯示器和配件 Single Red 625nm Common Anode RoHS:否 制造商:Avago Technologies 顯示器類(lèi)型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長(zhǎng):628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube
SA52-11EWA 制造商:Kingbright Corporation 功能描述:LED DISPLAY 0.52" HE RED CA
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