Output Stage VGA2 VGA1 Core TIA GX36420 Short-Form Datasheet 4 x 64Gbps Linear TIA Description Features The GX36420 is a 64Gbps linear quad TIA chip Quad 64Gbps linear TIA Integrated SPI and that integrates four lanes of TIAs for XI, XQ, YI, analogue interface and YQ channels, as well as digital interface Differential linear gain: 1505,000 , and circuitry for DC controls on a single die for > 30dB dynamic range 400G/600G coherent applications. The TIA > 40GHz 3dB-bandwidth and adjustable electrical characteristics, functions, and physical bandwidth dimensions are designed for small-form factor Automatic and manual gain control, Output integrated optical module such as CFP2 and Voltage Control, Peak Detection, RSSI and CFP4. Input Current Monitor, and Shutdown functionalities Low THD, cross talk, and power Typical Applications consumption for covering 64QAM receiver 400G/600G coherent systems with 64Gbps 16QAM/64QAM modulation format Integrated optical modules for CFP/CFP2/CFP4 form factors Block Diagram Scaler SPI Control ADC DAC CH2 CH3 CH4 CH2 CH3 CH4 CONFIG CH1,2,3,4 MC CH1,2,3,4 CH1,2,3,4 SW SW SHD CH2,3,4 CH2,3,4 CH2,3,4 CH1,2,3,4 CH1,2,3,4 SW SHD SW MGC/AGC SW SW SW CH1,2,3,4 SUM SUM SUM PDS1 SW CH1,2,3,4 CH2,3,4 PDS2 CH2,3,4 CH2,3,4 PD bias Peak GC-Gain OA-Output Input Monitor/LOS Gain Monitor Output Monitor PDS3 RSSI Filter Control Control Voltage Control PDS4 PD1 PD2 PD3 PD4 In1p Out1p In1n Out1n In2p Out2p AGC In2n Rectifier Out2n CM Loop1 In3p DC Offset Out3p DC Offset Loop3 In3n Loop2 Out3n In4p Out4p In4n Out4n Figure 1: Block Diagram 2018 Integrated Device Technology, Inc. 1 March 20, 2018 VCCin1 CS VCCin2 SCK VCCin3 MOSI VCCin4 MISO RST LOS PKD SUM GC SUM REF Peaking PKD GC1 PKD GC2 PKD GC3 VCCout1 PKD GC4 VCCout2 VCCout3 VCCout4 GC OA1 GC OA2 GC OA3 GC OA4GX36420 Short-Form Datasheet Corporate Headquarters Sales Tech Support 6024 Silver Creek Valley Road 1-800-345-7015 or www.IDT.com/go/support San Jose, CA 95138 408-284-8200 www.IDT.com Fax: 408-284-2775 www.IDT.com/go/sales DISCLAIMER Integrated Device Technology, Inc. (IDT) and its affiliated companies (herein referred to as IDT) reserve the right to modify the products and/or specifications described herein at any time, without notice, at IDT s sole discretion. Performance specifications and operating parameters of the described products are determined in an independent state and are not guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of IDT s products for any particular purpose, an implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property rights of IDT or any third parties. IDT s products are not intended for use in applications involving extreme environmental conditions or in life support systems or similar devices where the failure or malfunction of an IDT product can be reasonably expected to significantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT. Integrated Device Technology, IDT and the IDT logo are trademarks or registered trademarks of IDT and its subsidiaries in the United States and other countries. Other trademarks used herein are the property of IDT or their respective third party owners. For datasheet type definitions and a glossary of common terms, visit www.idt.com/go/glossary. All contents of this document are copyright of Integrated Device Technology, Inc. All rights reserved. 2018 Integrated Device Technology, Inc. 2 March 20, 2018