Product specification
Supersedes data of 2000 Jun 19
File under Integrated Circuits, IC19
2001 Feb 26
Page 2
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
TZA3013A; TZA3013B
transimpedance amplifier
FEATURES
• Low equivalent input noise, typically 8 pA/√Hz
• Wide dynamic range, typically 6 µA to 1.7 mA (p-p)
• Differential transimpedance of 4 kΩ
• Bandwidth from DC to 1.9 GHz
• Differential outputs
• On-chip Automatic Gain Control (AGC)
• No external components required
• Single supply voltage 3.3 V
• Bias voltage for PIN diode
• Remains linear up to 1.7 mA (p-p) input current
(unclipped)
• Switched output polarity available (types A and B).
ORDERING INFORMATION
TYPE
NUMBER
TZA3013AU−bare die in waffle pack carriers; die dimensions 0.810 × 1.230 mm−
TZA3013BU−bare die in waffle pack carriers; die dimensions 0.810 × 1.230 mm−
NAMEDESCRIPTIONVERSION
APPLICATIONS
• Digital fibre optic receiver in short, medium and long
haul optical telecommunications transmission systems
or in high speed data networks
• Wide-band RF gain block.
GENERAL DESCRIPTION
The TZA3013 is a transimpedance amplifier with AGC,
designed to be used in STM16/OC48 fibre-optic links.
It amplifies the current generated by a photo detector
(PIN diode or avalanche photodiode) and converts it to a
differential output voltage.
PACKAGE
2001 Feb 262
Page 3
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
transimpedance amplifier
BLOCK DIAGRAM
handbook, full pagewidth
100 pF
DREF
V
CC
270
Ω
1
2
IN
GNDAGNDD
GAIN
CONTROL
low noise
amplifier
AGCPILOT
412
TZA3013AU
37, 810
INQ
PEAK
DETECTOR
single-ended to
differential converter
BIAS
SOURCE
TZA3013A; TZA3013B
V
CC
Ω
2 kΩ
2 kΩ
TESTD
15
14
OUTSENSE
13
OUT
6
OUTQ
5
OUTQSENSE
11
MGT099
V
CC
50Ω50
9
TESTC
handbook, full pagewidth
100 pF
DREF
Fig.1 Block diagram of TZA3013AU (bare die only).
AGCPILOT
V
CC
270
Ω
1
GAIN
CONTROL
412
DETECTOR
PEAK
V
CC
50Ω50
TZA3013BU
2
IN
low noise
amplifier
GNDAGNDD
single-ended to
differential converter
SOURCE
37, 810
INQ
BIAS
TESTC
V
CC
15
Ω
2 kΩ
2 kΩ
9
TESTD
11
5
6
13
14
OUTSENSE
OUT
OUTQ
OUTQSENSE
MGU137
Fig.2 Block diagram of TZA3013BU (bare die only).
2001 Feb 263
Page 4
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
TZA3013A; TZA3013B
transimpedance amplifier
PINNING
SYMBOL
DREF11analog
IN22inputcurrent input; anode of PIN diode should be connected to
OUTQ613outputdata output; compliment of OUT
GNDA77groundanalog ground
GNDA88groundanalog ground
TESTC99inputtest input; not used in the application
GNDD1010grounddigital ground
TESTD1111inputtest input; not used in the application
PILOT1212analog
OUT136outputdata output; compliment of OUTQ; note 2
OUTSENSE145analog
V
CC
PAD
TZA3013AU
1515supplysupply voltage
PAD
TZA3013BU
TYPEDESCRIPTION
bias voltage output for PIN diode; connect cathode of
output
output
output
output
output
PIN diode to this pad
this pad; note 1
AGC voltage
data sense output for OUTQ; for test purposes
pilot tone detection current output
data sense output for OUT; for test purposes
Notes
1. DC bias voltage = 0.86 V.
2. This pad goes HIGH when current flows into pad IN.
2001 Feb 264
Page 5
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
transimpedance amplifier
FUNCTIONAL DESCRIPTION
The TZA3013 is a transimpedance amplifier intended for
use in fibreopticlinks for signal recovery in STM16/OC48
applications. It amplifies the current generated by a photo
detector (PIN diode or avalanche photodiode) and
converts it to a differential output voltage.
The most important characteristics of the TZA3013 are
high receiver sensitivity and wide dynamic range. High
receiver sensitivity is achieved by minimizing
transimpedance amplifier noise.
handbook, full pagewidth
OUTSENSE
V
CC
50 Ω
2 kΩ2 kΩ
OUT
TZA3013A; TZA3013B
The TZA3013 has a wide dynamic range to handle the
signal current generated by the PIN diode which can vary
from6 µA to 1.7 mA (p-p). This is implemented byanAGC
loop which reduces the preamplifier feedback resistance
so that the amplifier remains linear over the whole input
range. The AGC loop hold capacitor is integrated on-chip,
so an external capacitor is not required.
A differential amplifier converts the output of the
preamplifiertoadifferentialvoltage.Thedataoutputcircuit
is shown in Fig.3.
The logic level symbol definitions are shown in Fig.4.
50 Ω
OUTQ
OUTQSENSE
handbook, full pagewidth
V
O(max)
V
V
V
O(min)
OQH
V
OH
OQL
V
OL
16 Ω
16 Ω
Fig.3 Data output circuit.
V
OO
MGT102
V
CC
V
o(p-p)
MGR243
Fig.4 Logic level symbol definitions for data outputs OUT and OUTQ.
2001 Feb 265
Page 6
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
transimpedance amplifier
PIN diode bias voltage DREF
The performance of an optical receiver is largely
determined by the combined effect of the transimpedance
amplifierand the PIN diode. Inparticular, the method used
toconnectthePIN diode to the input and the layout around
the input pad strongly influences the main parameters of a
transimpedance amplifier, such as sensitivity, bandwidth,
and PSRR. Sensitivity is most affected by the value of the
total capacitance at the input pad. Therefore, to obtain the
highest possible sensitivity requires the value of total
capacitance to be as low as possible by reducing the
capacitanceofthePIN diode and the parasitics around the
input pad. To minimizeparasitics, the PIN diode should be
placed as close as physically possible to the IC. The
capacitance of the PIN diode can be reduced by making
the value of reverse voltage across it as high as possible.
The PIN diode can be connected to the input in two ways.
Figure 5 shows the PIN diode connected between
pads DREF and IN.
TZA3013A; TZA3013B
Pad DREF provides an easy bias voltage for the
PIN diode. The voltage at DREF is derived from VCCby a
low-pass filter comprising internal resistor R1and external
capacitor C2 which decouples any supply voltage noise.
The value of external capacitor C2 affects the value of
PSRR and should have a minimum value of 100 pF.
Increasing this value increases the value of PSRR.
For a supply voltage of 3.3 V, the reverse voltage across
the PIN diode is 2.438 V (3.3 V − 0.862 V). It is preferable
toconnect the cathode of the PIN diodetoavoltage higher
than VCC if there is one available on the PCB, leaving
pad DREF unconnected. If a negative supply voltage is
available, the configuration shown in Fig.6 can be used.
It shouldbe noted that inthis configuration, the directionof
the signal current is reversed to that shown in Fig.5. It is
essential that the PIN diode bias voltage is correctly
filtered to achieve the highest possible level of sensitivity.
V
R1
270 Ω
CC
30
TZA3013
MGU120
handbook, halfpage
100 pF
C2
1
DREF
I
i
2IN
Fig.5ThePIN diodeconnected between the input
and pad DREF.
V
handbook, halfpage
negative supply
1
DREF
2IN
I
i
CC
30
270 Ω
TZA3013
MGT103
Fig.6ThePIN diodeconnected between the input
and a negative supply voltage.
2001 Feb 266
Page 7
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
transimpedance amplifier
AGC
The TZA3013 transimpedance amplifier can handle input
currents from 6 µA to 1.7 mA which is equivalent to a
dynamic range of 49 dB. At low input currents, the
transimpedance must be high to obtain enough output
voltage, and the noise should be low enough to guarantee
a minimum bit error rate. At high input currents however,
the transimpedance should be low to avoid pulse width
distortion.To achieve the wide dynamic rangerequires the
gain of the amplifier to depend on the level of the input
signal. This is achieved in the TZA3013 by an AGC loop.
TheAGC loop comprises a peakdetector,a hold capacitor
and a gain control circuit. The peak detector detects the
amplitudeofthesignalandtheholdcapacitorstoresit.The
hold capacitor voltage is compared to a threshold voltage
which corresponds to an input current of 50 µA (p-p). The
AGCisonlyactivewhen the input signal level is larger than
the threshold level and is inactive when the input signal is
smaller than the threshold level.
TZA3013A; TZA3013B
When the AGC is inactive, the transimpedance is at its
maximum value of 4 kΩ differential. When the AGC is
active, the feedback resistor value of the transimpedance
amplifier is reduced, reducing its transimpedance, to keep
the output voltage constant. The transimpedance is
regulated from 4 kΩ at low currents (Ii<50µA) to 80 Ω at
highcurrents (Ii= 1.7mA). The AGC allowsthe amplifier to
remainlinearoverthe whole input current range compared
tootherconfigurationswhichclip the large signals, such as
those using Schottky diodes, for example.
ThetophalfofFig.7showstheoutputvoltageatpads OUT
and OUTQ (V
current (II) at a supply voltage of 3.3 V. The bottom half of
Fig.7 shows thedifference between V
output voltage changes linearly up to an input current of
50 µA. At this point and above, the AGC becomes active
and tries to keep the differential output voltage constant,
which is about 220 mV for a large range input current of
<1.7 mA.
OUT
and V
) as a function of DC input
OUTQ
and V
OUT
OUTQ
. The
3.2
handbook, full pagewidth
V
o
(V)
3.1
3.0
2.9
2.8
300
V
o(dif)
(mV)
200
100
0
110
V
o(dif)=VOUT
− V
OUTQ
MGT104
V
OUT
VCC = 3.3 V
V
OUTQ
10
2
3
10
Ii (µA)
4
10
Fig.7 AGC characteristics.
2001 Feb 267
Page 8
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
TZA3013A; TZA3013B
transimpedance amplifier
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOLPARAMETERMIN.MAX.UNIT
V
CC
V
n
I
n
P
tot
T
stg
T
j
T
amb
supply voltage−0.5+3.8V
DC voltage
pads IN and INQ−0.5+2.0V
pads OUT and OUTQ−0.5V
pads OUTSENSE and OUTQSENSE−0.5V
pad PILOT−0.5V
pad DREF−0.5V
+ 0.5 V
CC
+ 0.5 V
CC
+ 0.5 V
CC
+ 0.5 V
CC
DC current
pads IN and INQ−4.0+4.0mA
pads OUT and OUTQ−10+10mA
pad PILOT−0.2+0.2mA
pad DREF−4.0+4.0mA
total power dissipation−300mW
storage temperature−65+150°C
junction temperature−150°C
ambient temperature−40+85°C
HANDLING
Inputs and outputs are protected against electrostatic discharge in normal handling. However it is good practice to take
normal precautions appropriate to handling MOS devices (see
“Handling MOS devices”
).
CHARACTERISTICS
Typical values at Tj=25°C and VCC= 3.3 V; minimum and maximum values are valid over the entire ambient
temperature range and supply range; all voltages are measured with respect to ground; unless otherwise specified.
total power dissipationVCC= 3.3 V−85.8134mW
junction temperature−40−+125°C
ambient temperature−40+25+85°C
small-signaltransresistance
of the receiver
measured differentially;
AC-coupled
R
= ∞3.6710kΩ
L
R
=50Ω1.83.55.0kΩ
L
high frequency −3 dB pointCi= 0.5 pF1.71.9−GHz
total integrated RMS noise
current over bandwidth
referenced to input;
∆fi= 1.8 GHz third-order
−425−nA
Bessel filter; note 1
2001 Feb 268
Page 9
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
TZA3013A; TZA3013B
transimpedance amplifier
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
PSRRpower supply rejection ratio measured differentially;
note 2
f
= 100 kHz to 100 MHz−38−µA/V
i
f
= 3 GHz−3.2−mA/V
i
Automatic gain control loop: AGC
t
att
t
decay
I
th(AGC)(p-p)
Bias voltage: DREF
R
DREF
Inputs: IN and INQ
I
i(p-p)
V
I(bias)
R
i
Data outputs: OUT and OUTQ
V
o(cm)
V
o(se)(p-p)
V
OO
R
o
t
r
t
f
Notes
1. Measurement performed with Ci= 0.5 pF comprising 0.4 pF (photodiode) and 0.1 pF (allowed for PCB layout).
2. PSRR is defined as the ratio of change in input current (∆Ii) corresponding to change in supply voltage (∆VCC):
PSRR
For example, a 4 mV disturbance on V
current). The value of the external capacitor connected between pads DREF and GNDhas a significant effect on the
value of PSRR. The specification is valid with an external capacitor of 1 nF.
AGC attack time−10−µs
AGC decay time−10−µs
AGC threshold current
1. All coordinates are referenced, in µm, to the centre of the die.
2001 Feb 2613
Page 14
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
transimpedance amplifier
handbook, halfpage
CC
OUTSENSE
TZA3013AU
0
0
y
OUTQSENSE
OUT
OUTQ
810
µm
DREF
INQ
V
1514 13 12 11
1
IN
x
2
3
45678
AGC
1230 µm
TZA3013A; TZA3013B
handbook, halfpage
PILOT
TESTDGNDA
810
µm
DREF
IN
INQ
10
GNDA
9
MGT101
GNDD
TESTC
CC
OUTQSENSE
TZA3013BU
0
0
y
OUTSENSE
OUTQ
OUT
V
1514 13 12 11
1
x
2
3
45678
AGC
1230 µm
PILOT
TESTDGNDA
10
9
GNDA
GNDD
TESTC
MGT167
Fig.16 Bonding pad locations of the TZA3013AU.
Fig.17 Bonding pad locations of the TZA3013BU.
Physical characteristics of the bare die
PARAMETERVALUE
Glass passivation0.3 µm PSG (PhosphoSilicate Glass) on top of 0.8 µm silicon nitride
Bonding pad dimensionminimum dimension of exposed metallization is 90 × 90 µm (pad size = 100 × 100 µm)
except pads 2 and 3 which have exposed metallization of 80 × 80 µm
(pad size = 90 × 90 µm)
Metallization2.8 µm AlCu
Thickness380 µm nominal
Size0.810× 1.230 mm (0.996 mm
2
)
Backingsilicon; electrically connected to GND potential through substrate contacts
Attach temperature<440 °C; recommended die attach is glue
Attach time<15 s
2001 Feb 2614
Page 15
Philips SemiconductorsProduct specification
SDH/SONET STM16/OC48
TZA3013A; TZA3013B
transimpedance amplifier
DATA SHEET STATUS
DATA SHEET STATUS
Objective specificationDevelopmentThis data sheet contains the design target or goal specifications for
Preliminary specificationQualificationThis data sheet contains preliminary data, and supplementary data will be
Product specificationProductionThis data sheet contains final specifications. Philips Semiconductors
Note
1. Please consult the most recently issued data sheet before initiating or completing a design.
DEFINITIONS
Short-form specification The data in a short-form
specification is extracted from a full data sheet with the
same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limiting values definition Limiting values given are in
accordance with the Absolute Maximum Rating System
(IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device.
These are stress ratings only and operation of the device
attheseor at any other conditions above thosegiveninthe
Characteristics sections of the specification is not implied.
Exposure to limiting values for extended periods may
affect device reliability.
Application information Applications that are
described herein for any of these products are for
illustrative purposes only. Philips Semiconductors make
norepresentationorwarrantythatsuchapplicationswillbe
suitable for the specified use without further testing or
modification.
DISCLAIMERS
Life support applications These products are not
designed for use in life support appliances, devices, or
systems where malfunction of these products can
reasonably be expected toresult in personal injury. Philips
Semiconductorscustomersusingorsellingtheseproducts
for use in such applications do so at their own risk and
agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.
PRODUCT
STATUS
DEFINITIONS
product development. Specification may change in any manner without
notice.
published at a later date. Philips Semiconductors reserves the right to
make changes at any time without notice in order to improve design and
supply the best possible product.
reserves the right to make changes at any time without notice in order to
improve design and supply the best possible product.
Right to make changes Philips Semiconductors
reserves the right to make changes, without notice, in the
products, including circuits, standard cells, and/or
software, described or contained herein in order to
improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for
theuseofanyof these products, conveys no licence or title
under any patent, copyright, or mask work right to these
products,and makes no representations or warranties that
these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified.
BARE DIE DISCLAIMER
All die are tested and are guaranteed to comply with all
data sheet limits up to the point of wafer sawing for a
periodof ninety (90) daysfrom the date ofPhilips' delivery.
If there are data sheet limits not guaranteed, these will be
separately indicated in the data sheet. There is no post
waffle pack testing performed on individual die. Although
the most modern processes are utilized for wafer sawing
and die pick and place into waffle pack carriers, Philips
Semiconductorshas no control of third partyprocedures in
the handling, packing or assembly of the die. Accordingly,
Philips Semiconductors assumes no liability for device
functionality or performance of the die or systems after
handling, packing or assembly of the die. It is the
responsibility of the customer to test and qualify their
application in which the die is used.
(1)
2001 Feb 2615
Page 16
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The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.
2001
Internet: http://www.semiconductors.philips.com
71
Printed in The Netherlands403510/300/02/pp16 Date of release:2001 Feb 26Document order number: 9397 750 08038
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