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DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change DLBM-CA120 (16kbit eeprom) dlbm-ca121 (64kbit eeprom) bluetooth module class 2 a class 2 bluetooth module suitable for wireless audio applications. 1.features: z suitable for headset, mp3? applications. z reducing the size and thickne ss greatly using high-density packaging technology. z high sensitivity to achieve better performance. z compliant to various inte rfaces: uart, usb, pio... z wide operating temperature range: -30~+80 j . 2.device diagram figure 1. DLBM-CA120/ca121 block diagram tm
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 3.general specification bluetooth specification version 1.1 frequency 2402~2480mhz modulation fhss/gfsk transmission rate 721kbps receive sensitivity -83dbm maximum output power +4dbm(class 2) operating voltage 1.8v or 2.2~3.6v operating temperature -30~+80 j antenna impedance 50 ohm package size 9.1*7.9*1.5mm talk time (audio application) *up to 4.5 hours (120ma battery) stand-by time (audio application) *up to 200 hours (120ma battery) * base on application circuit figure 7* 4.rating min max unit storage temperature -40 +150 j vdd_1.8v -0.4 +1.9 v vdd_io -0.4 +3.6 v vreg_in -0.4 +4.2 v tm
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 5.recommended operating conditions min max unit guaranteed rf performance range -10 +70 j vdd_1.8v +1.7 +1.9 v vdd_io +2.7 +3.6 v vreg_in +2.2 +4.2 v 6.interface interface description antenna external antenna 50 ohm uart interface tx,rx,rts,cts(9600bps~1.5mbps) spi interface synchronous serial interface for firmware download pio interface 9 terminals
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 7.power supply diagram figure 2. power supply diagram terminal vdd=3.0v vdd=1.8v vdd_1.8v nc 1.7 to 1.9v vdd_io 2.7 to 3.6v 2.7 to 3.6v vreg_in 2.7 to 3.6v nc 8.rf characteristics operating condition: +25 j , vdd=1.8v rf characteristics min. typ. max. unit 1. fequency range 2400 ~ 2483.5 mhz 2. output power -6 1.5 4 dbm 3. sensitivity at 0.1% ber 1) 2402mhz -70 -83 dbm 2) 2441mhz -70 -83 dbm 3) 2480mhz -70 -83 dbm 4. maximum input level (ber ?? 0.1%) -20 0 dbm ant x?tal bpf vdd_1.8v bc2-audio vdd_io vreg_in ? balun eeprom
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 5. adjacent channel selectivity 1) c/i f=f 0 + 1mhz -4 0 db 2) c/i f=f 0 - 1mhz -4 0 db 3) c/i f=f 0 + 2mhz -35 -30 db 4) c/i f=f 0 - 2mhz -21 -20 db 5) c/i f ? f 0 + 3mhz -45 db 6) c/i f ?? f 0 - 5mhz -45 db 7) c/i f=f image -18 -9 db 6. adjacent channel transmit power 1) f=f 0 ? 2mhz -35 -20 dbc 2) f=f 0 ? 3mhz -55 -40 dbc 7. modulation characteristics 1) modulation g f1avg 140 165 175 khz 2) modulation g f2max 115 155 khz 8. initial carrier frequency tolerance 1) 2402mhz -75 -12 75 khz 2) 2441mhz -75 -11 75 khz 3) 2480mhz -75 -10 75 khz 9. carrier frequency drift 1) 1slot -20 9 20 khz 2) 5slot -25 10 25 khz 4) drift rate -20 6.5 20 khz/50us 10. 20db bandwidth for modulated carrier 1) 2402mhz 879 1000 khz 2) 2441mhz 816 1000 khz 3) 2480mhz 819 1000 khz 11.c/i co - channel 9 11 db
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 9.audio codec the DLBM-CA120 codec is compatible with the direct speaker drive and microphone input using a minimum number of external components. it is primarily intended for voice applications and it is fully operational from a single 1.8 volt power supply. a fully differential architecture has been implemented for optimal power supply rejection and low noise performance. the digital format is 15-bit/sample linear pcm with a data rate of 8khz. the codec has an input stage containing a microphone amplifier, variable gain amplifier and a u - g adc. its output stage contains a dac, low-pass filter and output amplifier. the codec functional diagram is shown below: 10. input stage a low noise variable gain amplifier amplifies the signal difference between inputs mic_n and mic_p. the input may be from either a microphone or line. the amplified signal is then digitised by a u - g adc. the high frequency single bit output from the adc is converted to 15-bit 8khz linear pcm data. the gain is programmable via a pskey and has a 42db range with 3db resolution. at maximum gain the full scale input level is 3mv rms. a bias network is required for operation input ampler output ampler ug -adc dac re mic_p mic_n spkr_p spkr_n digital circulty figure 3. DLBM-CA120 codec diagram
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change with a microphone whereas the line input may be simply a.c. coupled. the following sections explain each of these modes. single ended signals are supported by DLBM-CA120: a single ended signal may be driven into either mic_n or mic_p with the undriven input coupled to ground by a capacitor. at the maximum gain the signal to noise ratio is better than 60db and distortion is better than ?75db relative to a full-scale sine wave. at lower gain settings (such as used for line input) the signal to noise ratio improves to better than ?75db. 11. microphone input the DLBM-CA120 codec has been designed for use with microphones that have sensitivities between ?60 and ?40dbv. the sensitivity of ?60dbv is equivalent to a microphone output of 1 g a when presented with an input level of 94db spl and loaded with 1k [ . the microphone should be biased as shown: the input impedance at mic_n and mic_p is typically 20k [ . c1 and c2 should be 47nf. r l sets the microphone load impedance and is normally between 1 and 2k [ . v bias should be chosen to suit the microphone and have sufficient low noise. it may be obtained by filtering the output of a pio line. input ampler v bias mic c1 c2 mic_p mic_n r l figure 4. DLBM-CA120 microphone biasing
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 12. line input if the input gain is set to less than 21db DLBM-CA120 automatically selects line input mode. in this mode the input impedance at mic_n and mic_p is increased to 130k [ typical. at the minimum gain setting the maximum input signal level is 380 mv rms. figures 5 show two circuits for line input operation and show connections for either differential or single ended inputs. note: c1 and c2 should be 15nf. c1 c2 mic_p mic_n DLBM-CA120 c2 mic_p mic_n DLBM-CA120 figure 5. single-ended microphone input c1
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 13.output stage the digital data is converted to an analogue value by a dac, then it is filtered prior to amplification by the output amplifier and it is available as a differential signal between spkr_p and spkr_n. the output amplifier is capable of driving a speaker directly if its impedance is greater than or equal to 8 [ . the amplifier is stable with capacitive loads up to 500pf. the gain is programmable with a range of 21db and a resolution of 3db. maximum output level is typically 700 mv rms for high impedance loads, or 20ma rms for low impedance loads. the signal to noise is better than 70db and the distortion is less than ?75db. spkr_p spkr_n figure 6. speaker output
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 14.reference design fo r headset application ***important: the circuit is offered without warranty and delta is unable to accept any liability for direct or consequential loss associated with their use. it is therefore important for designers to ensure that their bluetooth headset design is properly evaluated in a design verification test. the results of the design verification test s hould be used to assess the suitability of the headset for manufacture.*** figure 7. headset application circuit
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 15. recommended reflow profile the temperature rise to 150 j for preliminary heating shall be made for 30 seconds or longer the preliminary heating shall be done at the temperature of 160 j+ 10j for 60 ~ 90 seconds. the heating shall be at the temperature of 200 j or higher for 20 ~ 40 seconds and the peak temperature shall be 230j+ 5j figure 8. reflow profile
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 16.pin description pin no. name description 1 pio_11 programmable i/o terminal 2 pio_9 programmable i/o terminal 3 sp+ speaker output positive 4 sp- speaker output negative 5 mic+ microphone input positive 6 mic- microphone input negative 7 gnd 8 gnd 9 gnd 10 ant rf input/output 11 aio_0 programmable input/output 12 gnd 13 gnd 14 gnd 15 vdd_1.8v refer to power supply diagram 16 vreg_in refer to power supply diagram
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 17 vdd_io refer to power supply diagram 18 usb_dn usb data minus 19 usb_dp usb data plus with selectable internal 1.5kohm pull-up resistor 20 uart_tx uart data output active high 21 uart_rx uart data input active high 22 uart_cts uart clear to send active low 23 uart_rts uart request to send active low 24 reset_b reset if low 25 pio_4 programmable input/output line 26 pio_5 programmable input/output line 27 pio_10 programmable input/output line 28 pio_3 programmable input/output line 29 gnd 30 gnd 31 gnd 32 pio_2 programmable input/output line 33 pio_1 programmable input/output line 34 pio_0 programmable input/output line 35 spi_mosi serial peripheral interface data input
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 36 spi_miso serial peripheral interface data output 37 spi_clk serial peripheral interface clock 38 spi_csb chip select for serial peripheral interface, active low
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 17.dimensions (mm) a 9.10.2 e 0.35 ?0.15 i 0.8 ?0.1 n 0.4 ?0.1 b 7.9 ?0.2 f 0.8 ?0.1 j 0.8 ?0.1 c 1.5 ?0.2 g 0.4 ?0.1 k 0.3 ?0.1 d 0.45 ?0.15 h 0.4 ?0.1 m 0.7 ?0.1 figure 9. output pin dimensions
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 18. layout guide unit: mm don?t place the ground on the top layer (inside area) figure 10. land pattern figure 11. layout example side view dlbm-c**2* ground via main ground plant t 5mil
DLBM-CA120/121 data sheet april 20, 2005 proprietary information and specifications are subject to change 19. record of changes date reason of change engineer dec 16, 2004? 1) update application circuit 2) create dlbm-ca121 64k eeprom version 3) includes spi pin definition emerson shih dec 30, 2004? application circuit upgrade. (low current consumption version) emerson shih jan 17, 2005? general specification & layout guide correction emerson shih april 20, 2005? includes pin dimension tolerance ming wu may 20, 2005? change dimensions tolerance 1) d ?g 0.4 ? 0.1 ? 0.45 ? 0.15 2) e ?g 0.4 ? 0.1 ? 0.35 ? 0.15 leo chuang contact information : website: http://www.deltaww.com email: richard.meng@delta.com.tw tel no.: 886-3-3591968#2930

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