779	2007-05-21 09:58:13	Kevin Purcell	Analog Devices AD831, AD8342 and AD8343 Gilbert cell mixers
Message	Date	From	Subject
The AD8342 and AD8343 in particular look like interesting options for RF experimenters -- good IP3 (better than 7dbm DRM), reasonable NF, low drive and inexpensive. AD831 High-Performance, Low Distortion 500-MHz Mixer ($8.10 in 100-499 offs) <http://www.analog.com/en/prod/0,,770_848_AD831%2C00.html> Good DR (IP3 10dB higher than a 7dBm diode ring). With 100mA current consumption it's not for portable equipment. Unity gain. NF is is "higher" but acceptable for HF use (perhaps an optional RF amp for very quiet locations). RF Frequency (MHZ) 400 IF Frequency (MHz) 200 LO Frequency (MHz) 400 LO Drive (dBm) +0 Conversion Gain 0 IP3 (dBm) 24 P1dB (dBm) 10 NF (dB) 14dB Voltage Supply (V) +9V to +11V Supply Current 100mA Package 20-Lead PLCC AD8342 Active Receive Mixer LF to 2.4 GHz ($3.65 in 100-499 offs) <http://www.analog.com/en/prod/0,,770_848_AD8342%2C00.html> Good DR (IP3 10dB higher than a 7dBm diode ring). With 100mA current consumption it's not for portable equipment. Low gain. NF is is OK but acceptable for HF use (perhaps an optional RF amp for very quiet locations). Differential inputs and outputs. 50 ohm LO port. F Frequency (MHZ) LF to 2400 IF Frequency (MHz) LF to 2400 LO Frequency (MHz) LF to 2400 LO Drive (dBm) +0 Conversion Gain 3.7 IP3 (dBm) 22.7 P1dB (dBm) 8.5 NF (dB) 12.2dB Voltage Supply (V) +5V Supply Current 97mA Package 16-Lead LFCSP AD8343 DC-to-2.5 GHz High IP3 Active Mixer ($3.65 in 100-499 offs) <http://www.analog.com/en/prod/0,,AD8343,00.html> Good DR (IP3 similar to a 7dBm diode ring). With 50mA current consumption it's not for portable equipment. NF is is "higher" but acceptable for HF use (with perhaps an optional RF amp for very quiet locations). Differential inputs and outputs. 50 ohm LO port. RF Frequency (MHZ) dc to 2500 IF Frequency (MHz) dc to 2500 LO Frequency (MHz) dc to 2500 LO Drive (dBm) -10 Conversion Gain 7 IP3 (dBm) 16.5 P1dB (dBm) 2.8 NF (dB) 14dB Voltage Supply (V) +5V Supply Current 50mA Package 14-Lead TSSOP Differential LO, IF and RF Ports 50 ohm LO input impedance -- Kevin Purcell kevinpurcell@pobox.com
786	2007-05-22 17:29:46	Thomas S Knutsen	Re: Analog Devices AD831, AD8342 and AD8343 Gilbert cell mixers
Kevin and all! I have used the AD831 in an Direct Conversion Receiver on 40M band. It is just an low pass filter, AD831 with an JFET LC oscilator and an audio amplifier. The internal IF amp in the AD831 is used, and the whole design is 50 ohm so it is fairly easy to work on. Most part of the circuit is from EMRFD. The Receiver is just so that an friend has somthing to build that is SMD, most hams say something like "SMD? no thats to difficult" so there is need for some practice. The only disavantage I have found using AD831 instead of SA602/SA612 is that there is only SMD packages, but it is realy easy to solder on to an PCB and then do some breadboarding on. If you would like the shematic on this smal receiver, then send me an mail off list (thomas@la3pna.net) and I send you the shematic as an jpg or Eagle cad file. Have been looking a bit on the AD8342 to use in an 23CM transverter, but I'l need some more practice in building some UHF equipment. Would be nice to see if anyone has used those mixers. 73 de Thomas LA3PNA Kevin Purcell wrote: > > The AD8342 and AD8343 in particular look like interesting options for > RF experimenters -- good IP3 (better than 7dbm DRM), reasonable NF, > low drive and inexpensive. > > AD831 High-Performance, Low Distortion 500-MHz Mixer ($8.10 in > 100-499 offs) > <http://www.analog.com/en/prod/0,,770_848_AD831%2C00.html > <http://www.analog.com/en/prod/0,,770_848_AD831%2C00.html>> > > Good DR (IP3 10dB higher than a 7dBm diode ring). With 100mA current > consumption it's not for portable equipment. Unity gain. NF is is > "higher" but acceptable for HF use (perhaps an optional RF amp for > very quiet locations). > > RF Frequency (MHZ) 400 > IF Frequency (MHz) 200 > LO Frequency (MHz) 400 > LO Drive (dBm) +0 > Conversion Gain 0 > IP3 (dBm) 24 > P1dB (dBm) 10 > NF (dB) 14dB > Voltage Supply (V) +9V to +11V > Supply Current 100mA > Package 20-Lead PLCC > > AD8342 Active Receive Mixer LF to 2.4 GHz ($3.65 in 100-499 offs) > <http://www.analog.com/en/prod/0,,770_848_AD8342%2C00.html > <http://www.analog.com/en/prod/0,,770_848_AD8342%2C00.html>> > > Good DR (IP3 10dB higher than a 7dBm diode ring). With 100mA current > consumption it's not for portable equipment. Low gain. NF is is OK > but acceptable for HF use (perhaps an optional RF amp for very quiet > locations). Differential inputs and outputs. 50 ohm LO port. > > F Frequency (MHZ) LF to 2400 > IF Frequency (MHz) LF to 2400 > LO Frequency (MHz) LF to 2400 > LO Drive (dBm) +0 > Conversion Gain 3.7 > IP3 (dBm) 22.7 > P1dB (dBm) 8.5 > NF (dB) 12.2dB > Voltage Supply (V) +5V > Supply Current 97mA > Package 16-Lead LFCSP > > AD8343 DC-to-2.5 GHz High IP3 Active Mixer ($3.65 in 100-499 offs) > <http://www.analog.com/en/prod/0,,AD8343,00.html > <http://www.analog.com/en/prod/0,,AD8343,00.html>> > > Good DR (IP3 similar to a 7dBm diode ring). With 50mA current > consumption it's not for portable equipment. NF is is "higher" but > acceptable for HF use (with perhaps an optional RF amp for very quiet > locations). Differential inputs and outputs. 50 ohm LO port. > > RF Frequency (MHZ) dc to 2500 > IF Frequency (MHz) dc to 2500 > LO Frequency (MHz) dc to 2500 > LO Drive (dBm) -10 > Conversion Gain 7 > IP3 (dBm) 16.5 > P1dB (dBm) 2.8 > NF (dB) 14dB > Voltage Supply (V) +5V > Supply Current 50mA > Package 14-Lead TSSOP > Differential LO, IF and RF Ports > 50 ohm LO input impedance > -- > Kevin Purcell > kevinpurcell@pobox.com > >
787	2007-05-22 18:25:18	Kevin Purcell	Re: Analog Devices AD831, AD8342 and AD8343 Gilbert cell mixers
Nice to see someone has already experimented with this device. Did you make any measurements on the RX? MDS? NF? Any issues with using it? How is the LO to RF leakage? Tuneable hum? Why not upload the JPG of the schematic to the files section of EMRFD (so people rading the archive will be easily able to find it).
788	2007-05-22 21:52:09	Thomas S Knutsen	Re: Analog Devices AD831, AD8342 and AD8343 Gilbert cell mixers
There is also an German transceiver using AD831 on the internet, the link is: I have not done any measurements yet, but should do that as soon as possible. The LO to RF lecage is not noticeable in the prototype that is breadboarded ugly style. I do have an problem with local noice here at about 8S on all HF bands, so it is sometimes difficult to both do measurements and listen to weak signals. I'm going to bring my receiver to an old coast fortress we are activating this weekend, so I'm going to make an recording and test the receiver a bit more then. I have added the shematic diagram to the files section on the group page, so that it is easy to find. 73 de Thomas Kevin Purcell wrote: > > Nice to see someone has already experimented with this device. > > Did you make any measurements on the RX? MDS? NF? > > Any issues with using it? How is the LO to RF leakage? Tuneable hum? > > Why not upload the JPG of the schematic to the files section of EMRFD > (so people rading the archive will be easily able to find it). > >
790	2007-05-23 09:46:23	la3pna	Re: Analog Devices AD831, AD8342 and AD8343 Gilbert cell mixers
I see that I forgot the link to the german page. (0400 in the morning before going to bead, noone should send e-mails) it is: http://www.g-qrp-dl.de/Projekte/AD831/hauptteil_ad831.html Also found some other pages
792	2007-05-24 07:01:57	Kevin Purcell	Re: Analog Devices AD831, AD8342 and AD8343 Gilbert cell mixers