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參數(shù)資料
| 型號(hào)： | SA5217D |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Postamplifier with link status indicator |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO20 |
| 封裝： | PLASTIC, SOT-163-1, SOL-20 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 98K |
| 代理商： | SA5217D |
Philips Semiconductors
Product specification
SA5217
Postamplifier with link status indicator
1998 Oct 07
7
TYPICAL PERFORMANCE CHARACTERISTICS
(continued)
Threshold vs R
for Different Values of R
HYST
(Driven Single Ended)
30
40
10
20
30
40
50
15
20
25
35
45
6k
5k
4k
3k
2k
T
P
R
THRESH
(k
)
V
CC
= 5V
T
A
= 27
°
C
F = 60MHz
On/Off Voltage vs R
THRESH
(Driven Single Ended)
R
THRESH
(k
)
0
10
20
30
40
50
10
20
30
40
50
OFF
ON
V
CC
= 5V
T
= 27
C
F = 60MHz
R
HYST
= 4k
V
I
P
Hysteresis vs R
for Different Values of R
HYST
(Driven Single Ended)
2
4
6
8
10
12
14
16
10
20
30
40
50
6k
5k
4k
3k
2k
V
CC
= 5V
T
A
= 27
°
C
F = 60MHz
R
THRESH
(k
)
H
P
5
4
3
2
1
0N
0
0
5
10
15
20
25
30
V
HYS
V
IN1
R
THRESH
= 33k
R
HYST
= 4k
V
THR
FORWARD
ACTIVE
REGION
(shaded)
OFF
V
IN
(mV
P-P
)
Hysteresis and Forward Active Region
F
SD00358
Figure 5. Typical Performance Characteristics (cont)
THEORY OF OPERATION AND APPLICATION
The SA5217 postamplifier is a highly integrated chip that provides
up to 60dB of gain at 60MHz, to bring mV level signals up to TTL
levels.
The SA5217 contains eight amplifier blocks (see Block Diagram).
The main signal path is made up of a cascade of limiting stages: A1,
A2 and A8. The A3-A4-A7 path performs a wideband full-wave
rectification of the input signal with adjustable hysteresis and decay
times. It outputs a TTL High on the “FLAG” output (Pin 5) when the
input is below a user adjustable threshold. An on-chip LED driver
turns the external LED to the On state when the input signal is
above the threshold. In a typical application the “FLAG” output is
tied back tot he “JAM” input; forcing the “JAM” input to TTL High will
latch the TTL Data Out at the last logical state.
Threshold voltage and hysteresis voltage range are adjustable with
resistors R
THRESH
and R
HYST
. The typical values given in the data
sheet will result in performance shown in the graph “Hysteresis and
Forward Active Region”. A minority of parts may be sensitive
enough that FLAG High (Off) occurs below the minimum functional
input signal level, V
IN1
. This condition is shown by the dotted line in
the graph. Such parts may require adjustment of R
THRESH
if it is
important to guarantee that an output signal is present for the full
hysteresis range. If this is not important, R
THRESH
may be adjusted
to give a FLAG Low for lower level input signals.
An auto-zero loop allows the SA5217 to be directly connected to a
transimpedance amplifier such as the SA5210, SA5211, or
SA5212A without coupling capacitors. This auto-zero loop cancels
the transimpedance amplifier’s DC offset, the SA5217 A1 offset, and
the data-dependent offset in the PIN diode/transimpedance amplifier
combination.
A typical application of the SA5217 postamplifier is depicted in
Figure 6. The system uses the SA5211 transimpedance amplifier
which has a 28k differential transimpedance gain and a -3dB
bandwidth of 140MHz. this typical application is optimized for a
50Mb/s Non Return to Zero (NRZ) bit stream.
As the system’s gain bandwidth product is very high, it is crucial to
employ good RF design and printed circuit board layout techniques
to prevent the system from becoming unstable.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA5217D,602 | 功能描述:高速運(yùn)算放大器 POST AMP WITH LINK STATUS IND RoHS:否 制造商:NXP Semiconductors 通道數(shù)量: 電壓增益 dB: 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 工作電源電壓: 電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-20 封裝:Tube 產(chǎn)品: |
| SA5217D/01 | 功能描述:特殊用途放大器 POST AMP W/LINK STATUS 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 |
| SA5217D/01,112 | 功能描述:特殊用途放大器 POST AMP W/LINK 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 |
| SA5217D/01,118 | 功能描述:特殊用途放大器 POST AMP W/LINK 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 |
| SA5217D/01-T | 功能描述:特殊用途放大器 POST AMP W/LINK STATUS 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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