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TZA3043BU 데이터시트 PDF




NXP Semiconductors에서 제조한 전자 부품 TZA3043BU은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 TZA3043BU 기능
기능 Gigabit Ethernet/Fibre Channel transimpedance amplifier
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TZA3043BU 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
DATA SHEET
TZA3043; TZA3043B
Gigabit Ethernet/Fibre Channel
transimpedance amplifier
Product specification
Supersedes data of 1998 Jul 08
File under Integrated Circuits, IC19
2000 Mar 28




TZA3043BU pdf, 반도체, 판매, 대치품
Philips Semiconductors
Gigabit Ethernet/Fibre Channel
transimpedance amplifier
Product specification
TZA3043; TZA3043B
PINNING
SYMBOL
DREF
GND
IPhoto
GND
GND
OUT
OUTQ
VCC
AGC
PIN
TZA3043T
1
2
3
4
5
6
7
8
PIN
TZA3043BT
1
2
3
4
5
7
6
8
PAD
TZA3043U
1
2, 3
4
5, 6
7, 8
9
10
11, 12
13
PAD
TZA3043BU
TYPE
1 analog
output
2, 3 ground
4 analog
input
5, 6
7, 8
10
9
11, 12
13
ground
ground
data
output
data
output
supply
input/
output
DESCRIPTION
bias voltage for PIN diode; cathode
should be connected to this pin
ground
current input; anode of PIN diode
should be connected to this pin;
DC bias level of 822 mV is one diode
voltage above ground
ground
ground
data output; pin OUT goes HIGH
when current flows into pin IPhoto
compliment of pin OUT
supply voltage
AGC analog I/O
handbook, halfpage
DREF 1
8 VCC
GND 2
7 OUTQ
TZA3043T
IPhoto 3
6 OUT
GND 4
5 GND
MGR287
Fig.3 Pin configuration of TZA3043T.
handbook, halfpage
DREF 1
8 VCC
GND 2
7 OUT
TZA3043BT
IPhoto 3
6 OUTQ
GND 4
5 GND
MGU098
Fig.4 Pin configuration of TZA3043BT.
2000 Mar 28
4

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TZA3043BU 전자부품, 판매, 대치품
Philips Semiconductors
Gigabit Ethernet/Fibre Channel
transimpedance amplifier
Product specification
TZA3043; TZA3043B
AGC
The TZA3043 transimpedance amplifier can handle input
currents from 1 µA to 1.5 mA. This means a dynamic
range of 63 dB. At low input currents, the transimpedance
must be high to get enough output voltage, and the noise
should be low enough to guaranty minimum bit error rate.
At high input currents however, the transimpedance
should be low to avoid pulse width distortion. This means
that the gain of the amplifier has to vary depending on the
input signal level to handle such a wide dynamic range.
This is achieved in the TZA3043 by implementing an
Automatic Gain Control (AGC) loop. The AGC loop
consists of a peak detector, a hold capacitor and a gain
control circuit.
The peak amplitude of the signal is detected by the peak
detector and it is stored on the hold capacitor. The voltage
over the hold capacitor is compared to a threshold level.
The threshold level is set to 25 µA (p-p) input current. AGC
becomes active only for input signals larger than the
threshold level.
It is disabled for smaller signals. The transimpedance is
then at its maximum value (8.3 kdifferential).
When AGC is active, the feedback resistor of the
transimpedance amplifier is reduced to keep the output
voltage constant. The transimpedance is regulated from
8.3 kat low currents (I < 30 µA) to 1 kat high currents
(I < 500 µA). Above 500 µA the transimpedance is at its
minimum and can not be reduced further but the front-end
remains linear until input currents of 1.5 mA.
The upper part of Fig.9 shows the output voltages of the
TZA3043 (OUT and OUTQ) as a function of the DC input
current. In the lower part, the difference of both voltages is
shown. It can be seen from the figure that the output
changes linearly up to 25 µA input current where AGC
becomes active. From this point on, AGC tries to keep the
differential output voltage constant around 200 mV for
medium range input currents (input currents <200 µA).
The AGC can not regulate any more above 500 µA input
current and the output voltage rises again with the input
current.
handbVoook3, f.u9ll pagewidth
(V)
3.7
3.5
3.3
3.1
600
Vo(dif)
(mV)
400
200
0
1
Vo(dif) = VOUT VOUTQ.
(1) VCC = 3 V.
(2) VCC = 3.3 V.
(3) VCC = 5 V.
2000 Mar 28
VOUT
MGU105
VCC = 5 V
VOUTQ
(1)
(2)
(3)
10 102 103 104
Ii (µA)
Fig.9 AGC characteristics.
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관련 데이터시트

부품번호상세설명 및 기능제조사
TZA3043B

Gigabit Ethernet/Fibre Channel transimpedance amplifier

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TZA3043BT

Gigabit Ethernet/Fibre Channel transimpedance amplifier

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