CHM2179b RoHS COMPLIANT W-band Mixer GaAs Monolithic Microwave IC Description The CHM2179b is a single channel mixer. The structure is a balanced mixer based on a six-quarter wave ring. The non-linear devices are high quality Schottky diodes providing low conversion loss and very low 1/f noise. This circuit is manufactured with the BESMMIC process: 1 µm Schottky diode device, air bridges, via holes through the substrate, stepper lithography. It is available in chip form. LO RF IF Main Features ¦ W-band LO and RF frequency range ¦ Low conversion loss ¦ IF from DC to 100MHz ¦ High LO/RF isolation ¦ High LO/AM noise rejection ¦ Very low IF noise ¦ Low LO input power ¦ Automatic assembly oriented ¦ BCB layer protection ¦ Small chip size: 1.53 x 1.17 x 0.10 mm Main Characteristics Tamb. = +25°C Symbol Parameter Min Typ Max Unit 76.5 77 GHz F_lo, F_rf LO, RF frequency 76 F_if IF frequency range [DC;100] Lc Conversion loss 8 dB I_lo/rf LO/RF isolation 22 dB -162 dBm/Hz N_if IF noise @ 100kHz Ref. : DSCHM2179b6013 - 13 Jan 06 1/9 MHz Specifications subject to change without notice United Monolithic Semiconductors S.A.S. Route Départementale 128 - B.P.46 - 91401 Orsay Cedex France Tel. : +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 W-band Mixer CHM2179b ESD Protection : Electrostatic discharge sensitive device. Observe handling precautions ! Ref. : DSCHM2179b6013 - 13 Jan 06 2/9 Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Specifications subject to change without notice W-band Mixer CHM2179b Electrical Characteristics Full operating temperature range, used according to section “Typical assembly and bias configuration” Symbol Parameter Min Typ Unit 77 GHz F_lo, F_rf LO, RF frequency F_if IF frequency range Lc Conversion loss 5 8 10 dB P_lo LO input power 3 5.5 8 dBm P_RF_1dB RF input power at 1 dB -3 0 VSWR_lo LO port VSWR (50Ω) 2:1 2.5:1 VSWR_rf RF port VSWR (50Ω) 2:1 2.5:1 IMP_if IF load impedance (1) 200 Ω I_lo/rf LO/RF isolation 16 22 dB R_lo_am LO AM noise rejection (SSB) 20 27 dB NF Noise figure for IF=1kHz (2) 35 40 dB Noise figure for IF=10kHz (2) 29 34 dB Noise figure for IF=100kHz (2) 21.5 26.5 dB Noise figure for IF=200kHz (2) 18 23 dB +V Positive supply voltage (3) 4.5 +I Positive supply current (3) 1.5 Top 76 Max [DC;100] Operating temperature range MHz dBm V -40 2.5 mA +100 °C (1) The IF optimum load for conversion loss is 200Ω. For minimum noise figure this load can be lower, the best results have been obtained on 50Ω. (2) Measured on 200Ω IF impedance. (3) An external resistor controls the bias current (see section “Typical Assembly and Bias Configuration”) Absolute Maximum Ratings (1) Symbol Parameter Values Unit +V Supply voltage 6 V +I Supply current 2.5 mA Maximum peak input power overdrive at LO port (2) 10 dBm Maximum input power at RF port (3) 3 dBm -55 to +125 °C P_lo P_rf_cw Tstg Storage temperature range (1) Operation of this device above anyone of these parameters may cause permanent damage. (2) Duration < 1s Ref. : DSCHM2179b6013 - 13 Jan 06 3/9 Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Specifications subject to change without notice W-band Mixer CHM2179b (3) Continuous wave mode. Ref. : DSCHM2179b6013 - 13 Jan 06 4/9 Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Specifications subject to change without notice W-band Mixer CHM2179b Chip Mechanical Data and Pin References 3 2 1 4 5 6 11 10 9 8 7 Unit = µm External chip size = 1530 x 1170 Chip thickness = 100 +/- 10 HF Pads (2,5) = 105 X 86 (BCB opening) DC/IF Pads = 86 x 83 (BCB opening) Pin number Pin name 1,3,4,6 2 LO 5 7 8 9 10 11 RF GND IF C_ext +V Ref. : DSCHM2179b6013 - 13 Jan 06 Description Ground: should not be bonded. If required, please ask for more information. LO input RF input Ground (optional) Not Connected IF output Bias decoupling Positive supply voltage 5/9 Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Specifications subject to change without notice W-band Mixer CHM2179b Typical Bias and IF Configuration Several external configurations are possible for bias and IF. The objective is to give flexibility for the integration. As this component is mainly dedicated to low IF use, there are several possibilities for interfacing with low noise IF amplifier. The optimum IF load for conversion loss is 200Ω, however depending on the IF amplifier noise characteristic this load can be modified in order to optimise the noise figure. A series capacitor, between IF output and the load is recommended. Due to high sensitivity to electrical discharges an integrated resistance is used and two ports are available for biasing. One is for the connection of a decoupling capacitor (C_ext) and the other one is for the supply voltage connection through an external series resistance (+V port). However, in order to keep the compatibility with the CHM2179, only the “C_ext” port can be used. +V +V R_load_IF R_load_IF C_bias R_bias1 C_ext +V C_bias C_IF R_bias2 C_IF IF C_ext +V IF 1k 1k RF LO RF LO Other possible configuration Recommended external bias and IFconfiguration (Compatible with the previous version) The recommended values for external components are: C_bias R_bias1 R_bias2 R_load_IF R_bias*C >> 1/F_IF 2.9kΩ for 1mA current consumption (V = 4.5V, typical LO power) R_bias2 = R_bias1 + 1kΩ From 50 to 200Ω Notes:: 1. R_bias = R_bias1 + 1kΩ when “+V” port is used, otherwize R_bias = R_bias2 2. R_bias can be adjusted if necessary; This allows to optimise the performances when some parameters are different from recommended ones (Supply voltage, LO power …). However maximum ratings for the current have to be taken into account. 3. A series capacitor at IF outputs is recommended for DC decoupling. Ref. : DSCHM2179b6013 - 13 Jan 06 6/9 Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Specifications subject to change without notice W-band Mixer CHM2179b Typical Assembly and RF Configuration In order to use acceptable wire bonding length, compatible with automatic pick and place and wire bonding equipment, an external matching network is proposed on low dielectric constant substrate. Substrate : RO.3003 εr=3 H=127 µm Substrate : RO.3003 εr=3 H=127 µm Example of integration using low dielectric constant substrate : Er=3, heigh=0.127mm (dimensions are in µm) W=500 L=985 W=250 L=180 W1=330 W2=200 L=120 W=330 L=125 W=330 L=200 W1=330 W2=200 L=200 W=250 L=300 W1=200 W2=330 L=200 Ref. : DSCHM2179b6013 - 13 Jan 06 W=200 L=729 W1=200 W2=330 L=150 W=330 L=200 W=330 L=225 7/9 Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Specifications subject to change without notice W-band Mixer CHM2179b Unit =µm Ref. : DSCHM2179b6013 - 13 Jan 06 8/9 Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Specifications subject to change without notice W-band Mixer CHM2179b Ordering Information Chip form : CHM2179b98F/00 Information furnished is believed to be accurate and reliable. However United Monolithic Semiconductors S.A.S. assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of United Monolithic Semiconductors S.A.S.. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. United Monolithic Semiconductors S.A.S. products are not authorised for use as critical components in life support devices or systems without express written approval from United Monolithic Semiconductors S.A.S. Ref. : DSCHM2179b6013 - 13 Jan 06 9/9 Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Specifications subject to change without notice