the contenders:
- NXP BGB210S, a 4th generation chip from Philip's spin-off NXP.
- 3 x 5 x 1 mm (!!).
- supports Bluetooth 2.0 + EDR.
- the higher data rate is really targeted at decreasing the TX active time.
- power consumption: 12ma @ 1.8v supply = 21.5mW
- CMOS w/ near-zero intermediate frequency radio.
- BGW211 802.11 system-on-a-chip, from NXP
- 400mw Tx power, 300mw Rx - both too much, me thinks.
- BCM4326
- similar power figures (295mw rx, 425mw tx)
- ultra-small 0.25mm WLCSP (!!)
- one chip solution for 802.11b/g ; BCM4328 supports 802.11a, too.
- Wi2wi w2cbw003 - 230ma tx, 210ma rx 802.11 module. too much.
- G2 Microsystems , developers of 802.11B (11mbps) system-on-a-chip for RFID.
- insanely low power dissipation! years on AA batteries! (based on 40s interval between data transmissions. 1.3mJ per transmission - an order of 500 lower than existing solutions. much lower static dissipation, too.
- includes 32 bit RISC processor with 80kb ram, 320 kb flash/rom.
- works with existing infrastructure, e.g. cisco.
- article on the chip / product, may 2006.
- http://www.gainspan.com/ -- competitors. they do not appear to have a product yet.
- Freescale LP1070FC 802.11a/b/g, requires external PA, LNA, switch. no data on the power consumption... actually, the datasheet appears to be rather incomplete!
- CSR UniFi-1 radio is far better, but I can't seem to find documentation for that, specifically the power dissipation.
- well, let's see - 20 hours talk time with a 1500mAH battery = 75ma. not bad, i guess; TX power can be decreased for the short range we need.
- BlueCore5 ; product brief, which includes more power info.
- rather recently developed; is the silicon debugged? The datasheet is preliminary information.
- 10 x 10mm, 0.8mm pitch 105 balls or 8x8 TFBGA.
- 1.5V core, 1.8V-3.6V io, USB
- bluetooth v2.0/2.1.
- 64mips DSP on-chip.
- 0.3 mA/MIPS at 1.5V. compare to Texas instruments TMS320VC5507 = 0.45ma/Mhz @ 1.2V core ~= 54Mw at 100mips; Kalimba ~= 30mw @64mips.
- this is 2mips/channel. enough? damn, gotta keep the power low!
- the Bluecore3 datasheet has more information on the DSP power consumption.
- 16 Mbit flash, too!
- BlueCore4 seems to be much better documented, but it does not include the DSP, which saves a lot on parts count.. as well as power.
- Bluecore4
- 8x8mm 96-bga,
- with 6mbit flash!
- bluetooth 2.0 / EDR.
- current consumption of about 26ma @ 1.8V supply when in SCO HV3
- Boroadcom BCM4326
- single chip 802.11b/g solution, integrated Arm7 CPU
- again, 300mW (not mA! smaller!) Rx, 400 mW Tx. That's still a lot of power.
- Broadcom BCM2047
- again, seems that these have yet to come out; details are scarce.
- The belkin bluetooth 2.0 adapter that I bought at compusa uses a BCM2045.
- CC2400, non-bluetooth - simpler!
- Zarlink - ultra low power, 433Mhz ISM band biomedical tranciever.
- about 7x7mm.
- 3v supply, 2.7 should work, 5ma = 13.5mw (yesss!)
- 800kbps raw data rate, max.
- 2.45Ghz wakeup reciever (??)
- seems to be designed for pacemakers & neurostimulators.
- need to contact zarlink for the full data sheet.
- RFM TR1100 - what the wolf lab uses for telemetry. OOK or ASK.
- 1Mbps max.
- only 1 channel, so far as i can tell...
- 8ma @ 2.7V = 21.6mw.
- integrated SAW filters = narrow bandwidth.
- 10 x 6 mm size, minimal external components, though it does seem to require extra resistors.
- really interesting method of obtaining RX input amplification stability - a SAW delay line, where the amplifiers are pulsed on at different times to permit the passage of RF energy. quote: "rf stability is obtained by distributing RF gain over time", as opposed to the superheterodyne solution of distributing gain over frequencies. If there were 100db of gain in 1 frequency, the amplifier is very likely to oscillate.
- RFM TRC101
- RFM TR3100 576 kbps ASK, -85dbm 10e-3 error rate.
- 10ma TX / 7ma RX
- 11x9,65mm SM-20L package
- kinda has a lot of external components.
- 434 mhz operation.
- ADF7025 Analog 431-464, 862-870, 902-928 ISM band FSK transceiver.
- 20ma TX (28ma at +10dbm) , 20ma RX from 2.3 to 3.6V supply.
- direct conversion: zero IF.
- SPI interface (plus a bunch of other signals).
- 384kbps max data rate.
- 7mm x 7mm 48 lead CSP
- CC1101 (chipcon was acquired by TI)
- 500kbps FSK, GFSK, MSK, OOK, ASK transmit/receive. 500kbps is only available in MSK, minimum-shift keying mode.
- -84dbm receiver sensitivity @ 500kbps.
- same bands as above + a bit more margin.
- suitable for frequency hopping systems.
- QLP 4mm x 4mm package
- 16ma TX (32.3 at +10dbm), 16ma RX
- 1.8 - 3.6V operation.
- Freescale MC13192, Zigbee compliant transciever, 2.405 - 2.480 Mhz, 5mhz channels, 2Mchip/sec over the air data rate, 200kbps practical rate.
- 30ma TX @ 0dbm, 37ma RX.
- 5mm x 5mm package
- full Zigbee PHY support.
- similar device from ember - 35ma TX / 35ma RX, 2.1-3.5V, 7x7mm, includes microprocessor.
- MC13201 - also targeted at 802.15.4 compliance.
- good to 250kbps, 5.0 mhz channels, DSSS, 2.0 - 3.4V,
- requires external transmit/receive switch
- 30ma TX / 37ma RX
- 5 x 5mm package
- TI / Chipcon CC2430 - 27ma TX / 27ma RX, with microcontroller, 7x7mm package, quick power-up.
- Cypress wireless USB
- 2.4ghz, 1mbps, DSSS encoding (like zigbee) -- DSSS reduces the data rate, of course; the data rate over the air is always 1mbps.
- the favored rate is 8x DSSS, where each symbol encodes one byte (8 bits) but requires 32 or 64 chips for transmission (resulting in a net rate of 250kbsp or 125 kbps, like zigbee. )
- 21ma normal operating current @-5dbm, 1.8V to 3.6V
- 6mm x 6mm 40-lead package
- document above is a generally good overview of the complexities of this type of design.
- SC1211
- 110kbps, UHF transceiver (~863 - 960mhz). very low power consumption in RX: 3ma / TX: 25ma @ +10dbm out
- out November 2007.
- competitor to below -- much lower RX power (and lower rate).
- includes 64byte fifo, data whitening, etc.
- advance info from Maxim
- very low power TX: 4ma @ -10dbm, RX: 150ua Hey.. that's lower power than most PLL, VCO, & PA put together!
- OOK, ~116kbps.
- Nordic nRF24L01 - THE BEST (so far!)
- datasheet.
- 12ma TX/RX, 2.1 3.6V
- 2mbps over-the-air rate, GFSK, 10m range (better with a bigger antenna)
- 4x4mm 20 pin package.
- 125 selectable channels.
- allows clock sharing with a microprocessor, e.g. the blackfin, provided it exceeds the 60ppm specification.
- 22ua power consumption in standby-1 mode (transition from this state to RX/TX in 130us), 320ua power consumption in standby-2 mode (ready to transition to TX)
- it is important to never keep the nRF24L01 in TX mode for more than 4ms at a time (!)
- i think the designer's confidence showes through the specification sheet: they are proud of the chip & it's specifications, which is a very good thing. it means they put some pride and passion into it.
- development board - need to buy! They also [distribute the IC http://www.sparkfun.com/commerce/product_info.php?products_id=690], yay!
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