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CXA2513M 3-Band Preset Graphic Equalizer IC (with standby and memory on last preset mode) Description The CXA2513M is a 3-band preset graphic equalizer developed for stereo set, cassette tape recorder with radio, etc. It has 5 modes: FLAT, ROCK, VOCAL, POP and JAZZ. The selection is via 5 control pins. The center frequencies of three bands are 100Hz, 1kHz and 10kHz. The center frequencies of these bands are determined by 2 external resistors. It also has a standby feature. When the standby pin goes low, the IC stores the last preset mode. When this pin goes high, the IC restores the last preset mode before standby. It can be initialized to any one of the two preset modes (FLAT, ROCK) upon power up. Features * Very few external parts * 3-band monolithic filters (100Hz, 1kHz, 10kHz) * The center frequencies of the band-pass filters can be adjusted * 5 preset modes (FLAT, ROCK, VOCAL, POP, JAZZ) * Equips with output ports to drive external LEDs * Mute pulse output pin * Standby feature with last preset mode memory * Can be initialized to one of the two preset modes (FLAT or ROCK) Applications Preset graphic equalizer for cassette tape recorder with radio and portable stereo Structure Bipolar silicon monolithic IC 20 pin SOP (Plastic) Absolute Maximum Ratings (Ta = 25C) * Supply voltage VCC 12 V * Allowable power dissipation PD 600 mW * Storage temperature Tstg -65 to +150 C Recommended Operating Conditions * Supply voltage VCC 4.5 to 10 * Operating temperature Topr -20 to +75 V C Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. -1- E97741-PS CXA2513M Block Diagram and Pin Configuration MUTE DET+ MUTE DET- VOCAL STANDBY LOW-FREQ MUTE JAZZ VCC IN2 20 19 18 17 16 15 14 13 12 11 MUTE DETECTOR 14dB INITIALIZATION MODE AND STANDBY CURRENT CONTROL LATCH & MEMORY GRAPHIC EQUALIZER GRAPHIC EQUALIZER INITIAZATION MODE 14dB BIAS 1 2 3 4 5 6 7 8 9 10 TIMING CAP FLAT INIT ROCK -2- OUT1 FLAT GND ISET POP REF IN1 OUT2 CXA2513M Pin Description Pin No. Symbol Voltage I/O resistance Equivalent circuit VCC Description 1 2 3 19 20 FLAT POP ROCK JAZZ VOCAL 50k VCC or 1V 147 50k -- 1 2 3 19 20 20k GND Mode selection input pins with LED driving capability. VCC 147 4 FLAT INIT -- -- 4 20k Flat initialization pin. If the pin is connected to a 220nF capacitors, it initializes to FLAT mode. If the pin is not connected, it initializes to ROCK mode. 20k GND VCC 100k 5 TIMING CAP VCC - 5VBE -- 5 147 150k 20k Timing capacitor pin. It is connected to a capacitor. The charging and discharging of this capacitor will determine the timing of the logic control. GND 6 6 GND GND GND GND pin. -3- CXA2513M Pin No. Symbol Voltage I/O resistance Equivalent circuit Description VCC 7 14 IN1 IN2 50k 5k 11.5k VCC/2 50k 7 14 147 Signal input pin. GND VCC 300 8 ISET 1.2V -- 8 147 Reference current setting pin (for graphic equalizer). Normally 160k resistor is connected. GND VCC 80k 147 300 300 80k GND 9 REF VCC/2 40k 9 Signal reference voltage pin. A capacitor is connected for ripple rejection. VCC NPN 10 11 OUT1 OUT2 300 VCC/2 0 10 11 300 Signal output pin. GND -4- CXA2513M Pin No. Symbol Voltage I/O resistance Equivalent circuit VCC 40k 40k Description 12 MUTE 0 300k 147 12 300k GND 40k 15k Mute pulse output pin. VCC 13 147 10k 7.5k 13 LOW FREQ VCC 0 Low frequency adjustment pin. Set the center frequency of the bass. GND VCC 15 VCC VCC -- 15 Power supply pin. VCC 147 16 STAND BY 16 -- 20k 50k 20k 5k 5k 5k 5k 5k 5k GND Standby pin. When not connected, the IC in standby. When connected to VCC, the IC in normal operation VCC 17 MUTE DET- -- -- 147 10k 17 18 147 10k Negative input of the mute detector comparator. 18 MUTE DET+ -- -- 4k 4k GND Positive input of the mute detector comparator. -5- CXA2513M Electrical Characteristics (Ta = 27C, VCC = 8V, C = 22F) Symbol Parameter Measurement conditions Standby pin is low - No input FLAT mode - No input FLAT preset mode, f = 1kHz @ THD = 1%, RL = 10k Vin = 0.05Vrms, fO = 100Hz Vin = 0.05Vrms, fO = 1kHz Vin = 0.05Vrms, fO = 10kHz Vin = 0.05Vrms, fO = 0.8 to 1.2kHz Vin = 0.05Vrms, fO = 0.8 to 12kHz Vin = 0.05Vrms, fO = 0.8 to 120Hz Vin = 0.05Vrms, fO = 0.8 to 12kHz Vin = 0.05Vrms, fO = 0.8 to 120Hz Vin = 0.05Vrms, fO = 0.8 to 1.2kHz Vin = 0.05Vrms, fO = 0.8 to 120Hz Vin = 0.05Vrms, fO = 0.8 to 1.2kHz Vin = 0.05Vrms, fO = 0.8 to 12kHz GE (Out1) - GE (Out2) Min. -- -- 2.7 12.6 Typ. 17.5 9.6 3.0 14.6 Max. 45.0 14.0 -- 16.6 Unit A mA Vpeak dB dB dB dB dB dB dB dB dB dB dB dB dB % % Vrms dB dB mA V V V ICC (STANDBY) Current consumption ICC (FLAT) Vout (max.) GE (FLAT) B GE (FLAT) M GE (FLAT) T GE (POP) M PRESETS GE (POP) T GE (ROCK) B GE (ROCK) T GE (VOCAL) B GE (VOCAL) M GE (JAZZ) B GE (JAZZ) M GE (JAZZ) T Bal fO THD VNOIS (FLAT) CS PSRR ILED Vmute (off) Vmute (on) Vstandby (off) Balance Center frequency deviation Total harmonic distortion Noise level Channel separation Power supply ripple rejection Maximum LED drive current Mute off voltage Mute on voltage Standby off voltage JAZZ POP Current consumption Maximum output level Bass Normal Mid Treble Mid Boost Treble Boost ROCK Bass Boost Treble Boost VOCAL Bass Boost Mid Boost Bass Boost Mid Boost Treble Cut 12.55 14.55 16.55 12.5 16.5 18.0 21.0 20.0 14.5 20.0 16.2 15.5 5.5 -1 -20 14.5 19.0 21.0 24.0 23.0 17.0 23.0 18.7 18.0 8.0 0 0 0.25 19 47 46 -- 0 7.1 -- 16.5 21.5 24.0 27.0 26.0 19.5 26.0 21.2 20.5 10.5 1 20 1 55 -- -- -- 0.1 -- -- RL = 10k, FLAT preset mode, f = 1kHz, Vin = 0.1Vrms RL = 10k, FLAT preset mode, DIN AUDIO filter, Vin = 0Vrms Vin = 0.1Vrms at 1kHz, FLAT preset mode Vin = 0.1Vrms at 100Hz, FLAT preset mode Current flowing through LED connected to a switch depressed Vm_det+ = 1/4VCC and Vm_det- = 1/2VCC Vm_det+ = 3/4VCC and Vm_det- = 1/2VCC ICC goes from standing to normal operation -- -- 40 40 15 -- 6.8 3 -6- CXA2513M Switches Statuses Item 1 2 3 4 5 6 7 8 S1 -- * * * -- -- -- -- * -- 9 -- -- -- * -- 10 -- -- -- S2 -- -- -- -- * -- -- -- -- * -- -- -- -- * -- -- -- S3 -- -- -- -- -- * -- -- -- -- * -- -- -- -- * -- -- S4 -- -- -- -- -- -- * -- -- -- -- * -- -- -- -- * -- S5 -- -- -- -- -- -- -- * -- -- -- -- * -- -- -- -- * * * 2 on * on off * * 2 on * on off S6 * * * * * * * * S7 * * * * * * * * S8 3 2 2 2 2 2 2 2 S9 off off on on on on on on S10 * * * * * * * * S11 on on on on on on on on S12 Input pins Test Pt. off off off off off off off off -- -- V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 V3 V4 ICC ICC Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 -7- CXA2513M Item 11 12 13 14 15 16 17 18 S1 * * * * * * * * S2 -- -- -- -- -- -- -- -- S3 -- -- -- -- -- -- -- -- S4 -- -- -- -- -- -- -- -- S5 -- -- -- -- -- -- -- -- S6 * * * * O * * * S7 * * * * * * O * S8 2 2 2 2 2 2 2 3 S9 on on on on on on on on S10 * * * O * * * * S11 on on on off on on on on S12 Input pins Test Pt. off off off off off off off off V3 V4 V3 = 0 V4 = 0 V4 V3 V5 V5 -- -- -- V2 Out1 Out2 Out1 Out2 Out1 Out2 Out1 Out2 -- Mute Mute ICC -8- CXA2513M Electrical Characteristics Measurement Circuit ICC V1 8V GND I1 15A S6 D2 D4 R1 470 R5 33k R4 33k GND R3 33k R2 33k V2 3V S7 123 S8 17 16 15 GND GND GND R9 10k OUT2 C8 10F 12 11 GND GND R10 47 C9 470F S10 GND V4 AC C4 10F 14 13 R7 33k C6 3.3nF MUTE V5 AC S11 V6 8V S9 S4 S5 GND GND GND 19 18 20 ROCK F_INIT T_CAP STANDBY M_DET+ M_DET- L_FREQ VOCAL MUTE FLAT POP GND ISET 1 S1 S2 2 S3 3 4 S12 C1 220nF GND 5 C2 100nF 6 IN1 REF 7 C3 10F V3 AC 8 R6 160k 9 C5 22F 10 C7 10F OUT1 R8 10k GND D1 GND D3 GND D5 GND GND GND GND GND GND -9- OUT1 OUT2 JAZZ VCC IN2 CXA2513M Application Circuit R2 180 D2 D4 R1 18k R4 180 R3 22k VCC VCC IN2 GND GND VCC GND To MUTE pin of POWER AMPLIFIER OUT2 C7 10F 14 13 R6 33k 12 11 C11 10F S4 S5 C C1 C9 3.3nF S6 C4 470F C5 100nF GND 20 GND GND 19 18 17 16 15 ROCK F_INIT T_CAP STANDBY M_DET+ M_DET- L_FREQ VOCAL MUTE FLAT POP GND ISET 1 S1 S2 2 S3 3 4 5 6 IN1 REF 7 8 9 10 GND D1 GND D3 GND D5 C2 220nF C3 100nF GND IN1 C6 10F R5 160k C8 22F GND OUT1 C10 10F OUT1 GND GND GND OPTIONAL CAPACITOR no capacitor - ROCK MODE Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. - 10 - OUT2 JAZZ VCC IN2 CXA2513M Description of Operation 1. Graphic Equalizer * Conventional system R1 VI Operational amplifier Vo RV CUT-OFF L Z (s) C R RO = R1 = R2 BOOST R2 Fig. 1 Fig. 1 indicates the conventional graphic equalizer system. This circuit performs boost and cut-off near "fO" controlled by the potentiometer Rv. ("fO" is resonance frequency determined by Z (s) (formed LCR).) The operation can be seen as follows: When the LCR circuit goes to the far left of Rv, a state of graphic equalizer becomes maximum cut-off. At that time, assuming transmittance as T (s), the following expression can be obtained. T (s) = Z (s) Z (s) + Ro Z (s) = sL + R + 1 sC Here as Then T (s) = LCS2 + RCS + 1 LCS2 + (R + RO) CS + 1 o oL 1 , o as o = , and Q as Q = , the frequency response can be obtained 2 LC R at cut-off Defining fO as fO = Also, when LCR circuit goes to the far right of Rv, a state of graphic equalizer becomes maximum boost. At that time transmittance is: T (s) = Z (s) + RO Z (s) = LCS2 + (R + RO) Cs + 1 LCS2 + RCS + 1 Defining fO, o and Q as for cut-off the frequency response can be obtained at boost. - 11 - CXA2513M Fig. 2 indicates frequency response at boost and cut-off. Response [dB] Boost 0dB Flat fO = 1 2 LC Cut-off Frequency [Hz] fO Fig. 2 * CXA2513M system R VI o s Q H (s) = o s2 + s + o2 Q H (s) Ic Gm1 Ib Gm2 Operational amplifier Vo R Z (s) Z (s) Fig. 3 The structure of the graphic equalizer used in this IC is shown on Fig. 3. This circuit performs boost and cut-off controlled by 2 transconductance amplifiers that can vary the conversion coefficient through control currents Ib, and Ic around o. ("o" is center frequency determined by band-pass filter.) Output impedance Z (s) of Gm1, Gm2 can be expressed as T (s) = 1 H (s) * Gm1 - 12 - CXA2513M Here, using o and Q BPF transmittance H (s) is expressed as s Q H (s) = o + o2 S2 + Q H (s) = o * Q Q 1 s+ + o * Gm1 Gm1 Gm1 * s o The formula shows that this system and the aforementioned LCR circuit have equivalent impedance characteristics on Z (s). Then, regarding Gm as the maximum value of Gm1 and Gm2, the operation can be observed as follows. Maximum cut-off occurs when Gm1 = Gm and Gm2 = 0. At that time transmittance T (s) is expressed as * s + o2 Q (1 + R * Gm) * o2 * s + o2 S2 + Q S2 + o Z (s) T (s) = = Z (s) + R This is equal to the frequency response of the conventional graphic equalizer at cut-off. Also, maximum boost occurs when Gm1 = 0 and Gm2 = Gm. At that time transmittance T (s) is given by as (1 + R * Gm) * o2 * s + o2 Q S2 + o Q * s + o2 T (s) = Z (s) + R = Z (s) S2 + This is equal to the frequency response of the conventional graphic equalizer at boost. As far as the operation is concerned the graphic equalizer on this IC and the conventional graphic equalizer are equal, even when the system differs. The merit in using this IC's system rests with the fact that monolithic filter technology realizes a graphic equalizer without external parts. The structure of the actual graphic equalizer, including BPF, is shown on Fig. 4. R1 30k 1 VI C3 SUM Vo R2 30k V1 C2 GND Gm2 GND 1 C1 Gm1 GND I CUT-OFF Gm3 I BOOST Gm4 GND GND Fig. 4 - 13 - CXA2513M 2. Power Up There are two ways of powering up the CXA2513M. They are 1) VCC pin (Pin 15) goes high, and after some time, the STANDBY pin (Pin 16) goes high. 2) VCC pin and STANDBY pins both goes high together. The two ways of power-up will results in different timing diagram and different initial mode. If both VCC and STANDBY pins go high together, the REF capacitor (Pin 9) will charge to half VCC. The IC will be initialized to ROCK mode. The timing diagram is shown in Fig. 5. VCC pin Turn on at the same time STANDBY pins Charge to 0.5VCC REF pin Charge to VCC TIMING CAP pin Bandgap voltage present Discharge to clamped voltage ISET pin LATCH OUTPUT ENABLE Latch output disable Only ROCK mode initialized LATCH ENABLE MUTE pin t2 Fig. 5 - 14 - CXA2513M If the VCC pin goes high while the STANDBY pin is not connected to VCC, the IC is in standby condition. The REF capacitor (Pin 9) and timing capacitor (Pin 5) will charge to VCC. Now, if the STANDBY pin is switched to VCC, the REF capacitor will discharge to half VCC and the timing capacitor will discharge to a clamped voltage (VCC - 5VBE). During the discharging of timing capacitor, all the LEDs light up. When the timing capacitor voltage reaches a certain threshold voltage, only the ROCK LED or FLAT LED lights up depending on Pin 4. If the Pin 4 is connected to a capacitor, the IC is initialized to FLAT mode. If the Pin 4 is not connected, the IC is initialized to ROCK mode. The timing diagram is shown in Fig. 6. VCC pin Charge to VCC Discharge to 0.5VCC REF pin Normal operation Standby on STANDBY pins Charge to VCC TIMING CAP pin Discharge to clamped voltage Bandgap voltage present ISET pin AII LEDs light up LATCH OUTPUT ENABLE LATCH ENABLE t1 Latch disable Delay the shutdown Restore the previous mode Latch on the initial mode Store the present mode Latch through what depressed mode MUTE pin Mute On t2 Normal operation Fig. 6 - 15 - CXA2513M 3. Mute Pulse Generation The CXA2513M has one voltage comparator built-in. The built-in voltage comparator is used to produce mute pulse during the depress of the preset mode switches. During depress the switch, there is a voltage pulse of about 1V depending appearing at the cathode of the LEDs. The mute detector comparator is used to detect this voltage changes at the cathode of LEDs and produce mute pulse at Pin 12. The polarity of the mute pulse can be set. When the M_DET+ pin (Pin 18) is higher than the M_DET- pin (Pin 17), the MUTE pin (Pin 12) will be high. When the M_DET+ pin (Pin 18) is lower than the M_DET- pin (Pin 17), the MUTE pin (Pin 12) becomes low. A capacitor is used to store the initial voltage before the depression of the mode switch. Once the switch is depressed, the capacitor starts discharge. The values of the resistors and capacitor set the duration of the mute pulse. Notes on Operation 1) Value of Timing Capacitor The timing and the duration of the MUTE pin and the LEDs light-up depends on the value of the timing capacitor as the timing capacitor is discharging to (VCC - 5VBE). The charging time constant is 250K(timing capacitor) and the discharging time constant is 150K(timing capacitor). The two threshold values: a) Latch Output Enable (LATCH_OE_ctl) b) Latch enable/Mute disable (LATCH_ctl) The threshold values of the Latch Output Enable (LATCH_OE_ctl) is set to (VCC - 3VBE) and the threshold values of the Latch enable/Mute disable (LATCH_ctl) is set to (VCC - 4VBE). So, the duration for all the LEDs light-up is 2VBE = (5VBE) exp (-t1/RC) where R = 150K and the sound appears after t2 seconds if the mute pulse output pin is used. This t2 is given by VBE = (5VBE) exp (-t2/RC) where R = 150K Therefore, depending on the requirements of the time on the mute sound and the duration of all LEDs light-up, choose the value of the timing capacitors. - 16 - CXA2513M 2) Initialize Preset IC The preset IC can be initialized into any one of the two modes out of the total 5 mods. The two modes are: a) FLAT b) ROCK In order to initialize the preset IC into FLAT, one external capacitor (220nF) is required. While to initialize the preset IC to ROCK, no external capacitor is required. 3) Supply voltage Ripple Rejection The value of the REF capacitor (Pin 9) determines the supply voltage ripple rejection ratio (SVRR). A reduce in this capacitance value decreases on the supply voltage ripple rejection ratio (SVRR). 4) Center Frequency of Band-pass Filters The center frequency of the graphic equalizer is determined by an external resistor. This resistor is 160k external resistor connected to the ISET pin (Pin 8). It is recommended to use a resistor with the small dispersion and temperature coefficients. By varying the value of the resistor connected to the ISET pin, the frequency response of the graphic equalizer can be shifted. By reducing the resistor value, all the three band-pass filters shift to high band. By increasing the resistor value, the filters shift to lower band. The center frequency of the bass band-pass filter can be varied independently. This bass center frequency is determined by the external resistor (33k) connected to the LOW-FREQ pin (Pin 13). By reducing the value of this resistor, the bass center frequency shifts to higher frequency. By this value, the bass center frequency shifts to lower frequency. LOW-FREQ resistor 56k 33k 10k Bass center frequency 70Hz 100Hz 200Hz - 17 - CXA2513M Example of Representative Characteristics AC response 23 : Output 22 21 20 19 18 17 16 15 14 13 12 101 102 103 104 105 [freq] FLAT MODE 21.0 20.5 20.0 19.5 19.0 18.5 18.0 17.5 17.0 16.5 16.0 15.5 15.0 14.5 101 102 103 104 105 [freq] POP MODE : Output AC response a) Frequency response of FLAT mode AC response 24.5 24.0 23.5 23.0 22.5 22.0 21.5 21.0 20.5 20.0 19.5 19.0 18.5 18.0 17.5 17.0 16.5 16.0 15.5 15.0 14.5 101 : Output b) Frequency response of POP mode AC response 23.5 23.0 22.5 22.0 21.5 21.0 20.5 20.0 19.5 19.0 18.5 18.0 17.5 17.0 16.5 16.0 15.5 15.0 14.5 14.0 101 : Output ROCK MODE VOCAL MODE 102 103 104 105 [freq] 102 103 104 105 [freq] c) Frequency response of ROCK mode AC response 19 : Output 18 17 d) Frequency response of VOCAL mode LED current vs. LED driving voltage 1 0.9 0.8 LED driving voltage [V] 16 15 14 13 12 11 10 9.0 8.0 101 102 103 104 105 [freq] JAZZ MODE 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 1 2 3 4 5 6 7 8 9 1011121314151617181920 LED current [mA] e) Frequency response of JAZZ mode f) LED current vs. LED driving voltage (Pins 1, 2, 3, 19 and 20) - 18 - CXA2513M Ripple rejection @100Hz vs. Capacitance -20 -25 160 Bass center frequency vs. Resistance Ripple rejection @100Hz [dB] -30 -35 -40 -45 -50 -55 -60 0 20 40 60 Capacitance [F] 80 100 Bass center frequency [kHz] 150 140 130 120 110 100 90 80 70 60 100 120 140 160 180 Resistance [k] 200 220 g) Ripple Rejection at 100Hz vs. Reference Capacitor (FLAT MODE) Mid center frequency vs. Resistance h) Bass Center Frequency vs. ISET Resistor (L-FREQ Resistor = 33k) Treble center frequency vs. Resistance 17 16 1.6 Treble center frequency [kHz] 140 160 180 Resistance [k] Mid center frequency [kHz] 1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 100 120 200 220 15 14 13 12 11 10 9 8 7 100 120 140 160 180 Resistance [k] 200 220 i) Mid Center Frequency vs. ISET Resistor j) Treble Center Frequency vs. ISET Resistor Bass center frequency vs. Resistance 500 Bass center frequency [kHz] 450 400 350 300 250 200 150 100 50 0 0 20 40 60 Resistance [k] 80 100 k) Bass Center Frequency vs. L-FREQ Resistor (ISET Resistor = 160k) - 19 - CXA2513M Package Outline Unit: mm 20PIN SOP (PLASTIC) + 0.4 12.45 - 0.1 20 11 + 0.4 1.85 - 0.15 0.15 + 0.3 5.3 - 0.1 7.9 0.4 + 0.2 0.1 - 0.05 1.27 0.24 M PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SOP-20P-L01 SOP020-P-0300 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER PLATING COPPER ALLOY 0.3g - 20 - 0.5 0.2 1 0.45 0.1 10 6.9 + 0.1 0.2 - 0.05 |
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