VOICE/DATA
PRODUCT PREVIEW
12x6.25 Gb/s TIA/LA RECEIVER ZL62089
www.ZARLINK.com
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The products, their specications, services and other information appearing in this publication are subject to change by Zarlink without notice.
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© 2007, Zarlink Semiconductor Inc. All Rights Reserved. Publication Number 7ZS323
ZL63039
12x6.25 Gb/s
VCSEL
Driver
ZL62089
12x6.25 Gb/s
TIA/LA
Receiver
ZARLINK
12x6 Gb/s
VCSEL
Array
ZARLINK
12x6 Gb/s
PIN
Array
Micro
Controller
Micro
Controller
Optical Fiber
Coupling
Tx in
Tx in
Tx in
Tx in
Tx out
Tx out
Tx out
Tx out
Rx out
Rx out
Rx out
Rx out
Rx in
Rx in
Rx in
Rx in
The growing use of the Internet has created increasingly higher demand for multi-
Gb/s I/O performance. The demand for 40 Gb/s bandwidth and beyond fuels the
growth of short-reach, high-bandwidth infrastructures within high-end telco and
datacom routers, switches, servers and other proprietary chassis-to-chassis links.
The ZL62089 transimpedance amplier achieves a nominal 5 GHz bandwidth over
a wide range of photodiode input capacitance. Excellent channel-to-channel iso-
lation ensures data integrity at the receiver sensitivity limits. An internal circuit
provides the photodiode reverse bias voltage supply and senses average photo-
current supplied to the photodiode array.
The ZL62089 is AC-coupled internally to a high-gain, high-bandwidth, dierential,
limiting amplier. The limiting amplier provides a dierential back-terminated
CML output that can be used to drive 6.25 Gb/s per channel transceivers or other
CML compatible clock and data recovery circuits. The CML output provides select-
able pre-emphasis control to improve signal quality. The limiting amplier features
a circuit that senses optical modulation amplitude (OMA) to determine a loss of
signal.
A selectable analog multiplexer provides junction temperature, supply voltage,
and received signal strength for each channel to enable optical module diagnos-
tic features. Data controlling the ZL62089 is loaded by a simple 2-wire serial serial
interface, reducing the number of pins required of a microcontroller.
Features
12-channel integrated
transimpedance and limiting
amplier operates up to 6.25 Gb/s
12 µA
PP
receiver sensitivity for 10
-12
BER at 6.25 Gb/s
Single +3.3V supply dissipating
140 mW per channel
Selectable analog multiplexer
provides junction temperature,
supply voltage, and received signal
strength for each channel
Individual channel signal detect
compares input signal strength with
adjustable threshold
Squelch automatically disables
output when input signal strength
falls below programmable threshold
2-wire interface provides access to
internal registers
CML output with selectable pre-
emphasis and output amplitude
control
250-micron channel pitch matches
optical ribbon ber and photodiode
arrays
IC dimensions 2245 x 3870 µm
Applications
Single data rate (SDR) and double
data rate (DDR) XAUI
Single data rate (SDR) and double
data rate (DDR) InniBand
1x, 2x, 4x Fiber Channel
Gigabit Ethernet
PCI Express
SNAP12 optical modules
Proprietary and CWDM parallel
optical modules
Customer Support
The ZL62089 12x6.25 Gb/s TIA/LA receiver
is supported by evaluation boards fea-
turing integrated photonics coupled
with Zarlink’s driver/receiver ICs to help
reduce time-to-market.