BL1110A DESCRIPTION: BL1110A(BL1001) is a low voltage versatile transmission IC. It offers the entire microphone, receive and line interface functions required in telephone sets. It performs the interface between the line and the transducers of the handset. It includes a DTMF amplifier, a microphone amplifier and a receive amplifier. The selection between the microphone amplifier and the DTMF amplifier is made with a “MUTE” function. The MUTE/input switches-off both the microphone and the receive amplifiers and switches-on the DTMF amplifier. FEATURES • • • • Low DC line voltage: operates down to 1.6 V Voltage regulator with adjustable DC voltage Provides a supply for external circuits Symmetrical high impedance inputs (64 kW) for dynamic, magnetic or piezoelectric microphones • Asymmetrical high impedance input (32 kW) for electrets microphones • DTMF input with confidence tone • MUTE input for pulse or DTMF dialing • Receiving amplifier for dynamic, magnetic or piezo-electric earpieces • AGC line loss compensation for microphone and earpiece amplifiers. • Line powered telephone sets, cordless telephones, fax machines, answering machines. BLOCK DIAGRAM： ： BL1001 http://www.belling.com.cn -1Total 8 Pages 8/10/2006 Wrote by 2006 BL1110A SELECTION GUIDE： ： • • DIP14：plastic dual in-line package; 14 leads (300 mil) SO14：plastic small outline package; 14 leads; body width 3.9 mm PIN CONFIGURATION： ： PIN DESCRIPTION： ： PIN SYMBOL FUNCTION 1 LN Positive line terminal 2 SLPE Slope adjustment 3 REG Line voltage regulator decoupling 4 nc No function 5 DTMF DTMF input 6 _MUTE MUTE input 7 IR Receive amplifier input 8 AGC Automatic gain control 9 MIC- Inverting microphone input 10 MIC+ Non inverting microphone input 11 VEE Negative line terminal 12 QR Receive amplifier output 13 GAR Receive gain reduction adjustment 14 VCC Supply voltage for speech and peripherals http://www.belling.com.cn -2Total 8 Pages 8/10/2006 Wrote by 2006 BL1110A ABSOLUTE MAXIMUM RATING： SYMBOL VLN PARAMETER VALUE UNIT positive continuous line voltage (VEE − 0.4) ~ 12 V (VEE − 0.4) ~ 13.2 V Vn (max) repetitive line voltage during switchon or line interruption maximum voltage on all pins VEE − 0.4 ~ VCC + 0.4 V I line ,max line current 140 mA total power dissipation（DIP14） 588 mW total power dissipation（SO14） 384 mW Tstorage storage temperature − 40 ~ 125 o C Tambient operating ambient temperature − 25 ~ 75 o C Tj junction temperature 125 o C Ptot ELECTRICAL CHARACTERISTICS： Iline = 15 mA; VEE = 0 V; RSLPE = 20 Ω; AGC pin connected to VEE; Zline = 600 Ω; f = 1 kHz; Tamb = 25 °C for TEA1110A(T); Tj = 25 °C for TEA1110AUH; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT Supplies（pins VLN , VCC , SLPE , REG ） Vref VLN stabilized voltage between LN and SLPE DC line voltage 3.1 3.35 3.6 V I line = 1mA — 1.6 — V I line = 4mA — 2.3 — V I line = 15mA 3.35 3.65 3.95 V I line = 140mA — — 6.9 V — ± 30 — mV 1.1 1.4 mA — 2.9 — V — 64 — kΩ — 32 — kΩ DC line voltage ∆VLN (T ) variation with Tamb = −25o C ~ 75o C temperature referred to 25 °C internal current I CC VCC = 2.9V consumption supply voltage for I peripheral = 0mA VCC peripherals Microphone amplifier (pins MIC+ and MIC-) input impedance differential between pins MIC+ and MICsingle-ended between zi pinsMIC+/MIC- and VEE http://www.belling.com.cn -3Total 8 Pages 8/10/2006 Wrote by 2006 BL1110A Gvtx ∆Gvtx ( f ) ∆Gvtx (T ) VLN (max) voltage gain from MIC+/MIC- to LN gain variation with frequency referred to 1 kHz gain variation with temperature referred to 25 °C maximum sending signal (RMS value) VMIC = 4mV ( RMS ) 42.7 43.7 44.7 dB f = 300 ~ 3400 Hz — ± 0 .2 — dB Tamb = −25o C ~ 75o C — ± 0 .3 — dB I line = 15mA; THD = 2% 1.4 1.7 — V I line = 4mA; THD = 2% — 0.8 — V — 20 — kΩ 32 33 34 dB — ± 0 .2 — dB Tamb = −25o C ~ 75o C — ± 0 .3 — dB RL = 150Ω; THD = 2% — 0.25 — V R L = 450Ω; THD = 2% — 0.35 — V I line = 85mA — 5.9 — dB — 23 — mA — 56 — mA — 20 — kΩ 24.1 25.3 26.5 dB Hz — ± 0 .2 — dB Tamb = −25o C ~ 75o C — ± 0 .4 — dB — -15 — dB Receiving amplifier (pins IR, QR and GAR) zi input impedance voltage gain from IR to QR gain variation with ∆G vrx ( f ) frequency referred to 1 kHz gain variation with ∆Gvtx (T ) temperature referred to 25 °C maximum receiving signal Vo (max) (RMS value) Automatic gain control (pin AGC) gain control range for microphone ∆Gvtrx and receiving amplifiers with respect to Iline = 15 mA highest line current for I start maximum gain lowest line current for I stop minimum gain DTMF amplifier (pin DTMF) Gvrx zi input impedance Gvdtmf voltage gain from DTMF to LN gain variation with frequency referred to 1 kHz gain variation with ∆Gvdtmf (T ) temperature referred to 25 °C voltage gain from DTMF to QR Gvct (confidence tone) Mute function (pin MUTE) ∆Gvdtmf ( f ) VIL VIH I MUTE ∆Gvtrxm VIR = 4mV ( RMS ) f = 300 ~ 3400 Hz MUTE = LOW VDTMF = 20mV ( rms ) f = 300 ~ 3400 VDTMF = 20mV ( rms ) RL = 150Ω LOW level input voltage VEE − 0.4 — V EE + 0.3 V HIGH level input voltage V EE + 1.5 — VCC + 0.4 V input current — 1.5 — uA — 80 — dB gain reduction for microphone and receiving amplifiers http://www.belling.com.cn MUTE = LOW -4Total 8 Pages 8/10/2006 Wrote by 2006 BL1110A TYPICAL APPLICATIONS AND APPLICATION HINTS： ： TEST CIRCUITS： ： http://www.belling.com.cn -5Total 8 Pages 8/10/2006 Wrote by 2006 BL1110A TYPICAL CHARACTERISTICS： Fig.1 Main voltages versus Line current Fig.2 Voltage gain from MIC to LN http://www.belling.com.cn -6Total 8 Pages 8/10/2006 Wrote by 2006 BL1110A Fig.3 Voltage gain from IR to QR Fig.4 Voltage gain from DTMF to LN http://www.belling.com.cn -7Total 8 Pages 8/10/2006 Wrote by 2006 BL1110A Fig.5 Confidence Tone http://www.belling.com.cn -8Total 8 Pages 8/10/2006 Wrote by 2006