Philips TZA3013BU, TZA3013AU Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TZA3013A; TZA3013B

SDH/SONET STM16/OC48
transimpedance amplifier

Product specification
Supersedes data of 2000 Jun 19
File under Integrated Circuits, IC19

2001 Feb 26

Philips Semiconductors Product 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 −

NAME DESCRIPTION VERSION

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 26 2

Philips Semiconductors Product specification

SDH/SONET STM16/OC48
transimpedance amplifier

BLOCK DIAGRAM

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100 pF

DREF

V

CC

270

Ω

1

2

IN

GNDA GNDD

GAIN

CONTROL

low noise

amplifier

AGC PILOT

412

TZA3013AU

37, 8 10

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

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100 pF

DREF

Fig.1 Block diagram of TZA3013AU (bare die only).

AGC PILOT

V

CC

270

Ω

1

GAIN

CONTROL

412

DETECTOR

PEAK

V

CC

50Ω50

TZA3013BU

2

IN

low noise

amplifier

GNDA GNDD

single-ended to

differential converter

SOURCE

37, 8 10

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 26 3

Philips Semiconductors Product specification

SDH/SONET STM16/OC48

TZA3013A; TZA3013B

transimpedance amplifier

PINNING

SYMBOL

DREF 1 1 analog

IN 2 2 input current input; anode of PIN diode should be connected to

INQ 3 3 input decision level adjust input; note 1
AGC 4 4 analog

OUTQSENSE 5 14 analog

OUTQ 6 13 output data output; compliment of OUT
GNDA 7 7 ground analog ground
GNDA 8 8 ground analog ground
TESTC 9 9 input test input; not used in the application
GNDD 10 10 ground digital ground
TESTD 11 11 input test input; not used in the application
PILOT 12 12 analog

OUT 13 6 output data output; compliment of OUTQ; note 2
OUTSENSE 14 5 analog

V

CC

PAD

TZA3013AU

15 15 supply supply voltage

PAD

TZA3013BU

TYPE DESCRIPTION

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 26 4

Philips Semiconductors Product 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 kΩ 2 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

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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 26 5