BD3812F_1

Sound Processors for Home Theater Systems 2ch Electronic Volume BD3812F No.10081EAT03 ●Description BD3812F is an electronic volume having volume, gain amplifier functions necessary for applications in AV receivers, home theatre systems, min-component systems and so forth. Having a chip select terminal, it can be controlled until 4 chips with common bus line. ●Features 1) Residual noise : 1.2µVrms {dynamic range : 131dB (IHF-A)} 2) 2ch independent volume (0 to -103dB, MUTE 1dB/step) 3) 8ch at maximum available in combination of any of BD3811K1, BD3813KS, BD3814FV, BD3815KS (6ch volume) in common bus line 4) It can be controlled until 4 chips with common bus line at the same time 5) Maximum output voltage : 4.2Vrms (Vcc=7, VEE=-7V, RL=10kΩ) 6) 2-line serial control (for both 3.3V and 5V) 7) Built-in Output gain amplifier for adjustment of output signal voltage (0, 6 to 18dB, 2dB/step) 8) Output mute controllable by serial data and external control terminal ●Applications AV receivers, home theater systems, mini-component systems, etc. ●Absolute maximum ratings (Ta=25℃) Parameter Powewr supply voltage Input signal voltage Power dissipation Operating temperature range Storage temperature range *1 Symbol VCC VEE VIN Pd Topr Tastg Ratings 7.5 -7.5 *1 Unit V V mW ℃ ℃ VCC+0.3 to VEE-0.3 450*2 －20 to +75 －55 to +125 *2 Even in the specified range of Power Supply Voltage, applying voltage only to the VCC side may cause an excessive current to give a permanent damage to the IC. When starting up power supplies, VEE and VCC should be powered on simultaneously or VEE first; then followed by VCC. Over Ta＝25°C, reduce at the rate of 4.5mW/°C. When installed on the standard board (size: 70x70x1.6mm). ●Operating conditions It must function normally at Ta＝25°C. Parameter Operating source voltage Symbol VCC VEE Min. 5 -7.3 Ratings Typ. 7 -7 Max. 7.3 -5 Unit V www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/9 2010.06 - Rev.A BD3812F Technical Note ●Electrical characteristics Ta=25℃, VCC=7V, VEE＝-7V, f=1kHz, Vin=1Vrms, RL=10kΩ, Rg=600Ω, Master volume=0dB, Output gain=0dB , unless otherwise specified. Limits Parameter Unit Conditions Symbol Min. Typ. Max. Circuit current VCC VEE IQ ― -6 -2 2 -2 0 6 ― 2 mA No signal Output voltage gain Gv dB Measure : Pin14, 13 Measure : Pin14, 13 BW=400～30kHz Measure : Pin14, 13 THD=1% Measure : Pin 14, 13 Rg=0Ω, BW=IHF-A Measure : Pin1, 3 Measure : Pin13(OUT2) Rg=0Ω, BW=IHF-A Reference : Pin14(OUT1)=1Vrms Measure : Pin14(OUT1) Rg=0Ω, BW=IHF-A Reference : Pin13(OUT2)=1Vrms Measure : Pin 14, 13 Vin=3Vrms Measure : Pin 14, 13 0 to –53dB, Vin=3Vrms Measure : Pin 14, 13 -54 to –103dB, Vin=3Vrms Measure : Pin 14, 13 BW=IHF-A, Vin=3Vrms Measure : Pin 14, 13 Vin=0.4Vrms Measure : Pin 14, 13 Vin=0.4Vrms Total harmonic distortion ratio THD ― 0.005 0.09 % Maximum output voltage Vomax 3.4 4.2 ― Vrms Output noise voltage Vno ― 1.2 5 µVrms Input impedance Cross talk between channels 1ch→2ch Cross talk between channels 2ch→1ch Volume control range Rin 20 30 40 kΩ CTC12 ― -100 -70 dB CTC21 ― -100 -70 dB GVR -106 -103 -100 dB Volume set error 1 VE1 -2 0 2 dB Volume set error 2 VE2 -3 0 3 dB Maximum attenuation Vmin ― -118 -105 dB Output gain control range GOG 16 18 20 dB Output gain set error GOE -2 0 -2 dB * This product is not of “anti radiation design”. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/9 2010.06 - Rev.A BD3812F ●Timing chart 1) Signal timing conditions ・Data is read on the rising edge of the clock. ・Latch is read on the falling edge of the clock. ・Latch signal must terminate with the LOW state. * To avoid malfunctions, clock and data signals must terminate with the LOW state. Technical Note CL (CLOCK) 90% 90% 90% 90% twc 10% twc 10% 10% thd ts th tsd thd tsl thl DA DATA LATCH 90% twd 90% twh 10% 10% 90% 90% twl 90% DATA DATA 10% LATCH Terminate with Low. Fig.1 Limits Min. 2.0 2.0 2.0 2.0 1.0 1.0 1.0 1.0 1.0 1.0 Typ. － － － － － － － － － － Parameter Minimum clock width Minimum data width Minimum latch width LOW hold width Data setup time (DATA→CLK) Data hold time(CLK→DATA) Latch setup time(CLK→LATCH) Latch hold time(DATA→LATCH) Latch low setup time Latch low hold time 2) Voltage conditions for control signal Parameter “H”input voltage “L” input voltage Symbol twc twd twl twh tsd thd tsl thl ts th Max. － － － － － － － － － － Unit µs µs µs µs µs µs µs µs µs µs Condition Vcc=5～7.3V VEE=-5～-7.3V Limits Min. 2.2 0 Typ. － － Max.(≦Vcc) 5.5 1.0 Unit V V www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 3/9 2010.06 - Rev.A BD3812F 3) Basic configuration of control data format Input direction MSB D16 Data D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 Technical Note LSB D2 D1 D0 Data Select Address ・Control data format Input direction D16 D15 D14 D13 D12 D11 Data ① Master Volume 2ch Data ② D16 * D15 * D14 * D13 * D12 * D11 * Select Address D10 D9 D8 D7 D6 D5 D4 D3 D2 1 D4 D3 D2 1 D1 1 D1 1 D0 0 D0 1 Master Volume 1ch D10 * D9 * D8 * D7 * D6 * D5 Output gain amp * is 0 or 1. By changing the setting of select address, 4 control data formats can be selected. Do not set the select address data to other than specified above. At power on, initialize all the data. Input direction MSB LSB MSB Data① “L” shows latch. LSB L L Data② After power on, in the second time or after, only data you want to change can be set. (Example) When to change bus Input direction MSB LSB Data① “L” shows latch. L www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/9 2010.06 - Rev.A BD3812F 4) SEL terminal setting By determining the SEL terminal voltage, select address can be fixed. An example of the SEL terminal voltage setting method is shown below. Setting P1 Condition P2 Condition Setting of SEL(12pin) Terminal SEL(12pin) Terminal Voltage(V) Technical Note Select Address D2 D1 P1 Setting 1 VEE － 12 VEE VEE 0 0 20k VCC P1 Setting 2 VCC VEE 12 10k P2 VCC/3+2×VEE/3 VEE 0 1 10k VCC Setting 3 VCC VEE 12 20k P1 P2 VCC/3 VEE 1 0 P1 Setting 4 VCC － 12 VCC VCC 1 1 SEL terminal voltage is DGND standard. When to use several chips of BD3812F Select address can be changed by setting SEL terminal (12pin), therefore, up to 4 chips can be used on a same bus line. When to use one chip or two chips of this IC, use the setting 1 and the setting 4. In this case, the terminal voltage of 12pin may be VCC or VEE, therefore external resistor of 12pin is unnecessary. When to use BD3812F and BD3811K1 at the same time By using BD3812F and BD3811K1 at the same time, independent control of 8ch volume can be made. And control is available on a same bus line. In this case, be sure to set the SEL terminal setting to “setting 4”. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 5/9 2010.06 - Rev.A BD3812F ●Application circuit Technical Note 10µ IN1 1 14 OUT1 AGND 2 13 OUT2 IN2 1 0μ 3 12 SEL AGND V EE 4 11 DGND MUTE 5 47 μ 10 A GND V CC 6 47µ 7 LOGIC 9 DA 8 CL UNIT RESISTOR :Ω CAPACITOR : F Fig.2 ●Reference data 2.5 CIRCUIT CURRENT (mA) 2 1.5 1 8 6 4 OUTPUT VOLTAGE (Vrms) VCC 10 10 1 GAIN(dB) 0.5 0 -0.5 -1 -1.5 -2 -2.5 0 2 4 6 8 10 2 0 -2 -4 0.1 VEE 0.01 -6 -8 -10 10 100 1000 10000 100000 0.001 0.001 0.01 0.1 1 10 POWER SUPPLY (V) FREQUENCY (Hz) INPUT VOLTAGE (Vrms) Fig.3 Circuit current - Power supply Fig.4 Voltage gain - Frequency Fig.5 Output voltage - Input voltage 10 20 1 15 THD+N (%) 0.1 GAIN (dB) 10 0, 6～18dB 2dB/step 0.01 5 0.001 0 0.0001 0.001 0.01 0.1 1 10 -5 10 100 1000 10000 100000 INPUT VOLTAGE (Vrms) FREQUENCY (Hz) Fig.6 THD+N - Input voltage Fig.7 Output gain - Frequency www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 6/9 2010.06 - Rev.A BD3812F Technical Note ●Notes for use (1) Numbers and data in entries are representative design values and are not guaranteed values of the items. (2) Although we are confident in recommending the sample application circuits, carefully check their characteristics further when using them. When modifying externally attached component constants before use, determine them so that they have sufficient margins by taking into account variations in externally attached components and the Rohm LSI, not only for static characteristics but also including transient characteristics. (3) Absolute maximum ratings If applied voltage, operating temperature range, or other absolute maximum ratings are exceeded, the LSI may be damaged. Do not apply voltages or temperatures that exceed the absolute maximum ratings. If you think of a case in which absolute maximum ratings are exceeded, enforce fuses or other physical safety measures and investigate how not to apply the conditions under which absolute maximum ratings are exceeded to the LSI. (4) VEE potential Make the VEE pin voltage such that it is the lowest voltage even when operating below it. Actually confirm that the voltage of each pin does not become a lower voltage than the VEE pin, including transient phenomena. (5) Thermal design Perform thermal design in which there are adequate margins by taking into account the allowable power dissipation in actual states of use. (6) Shorts between pins and misinstallation When mounting the LSI on a board, pay adequate attention to orientation and placement discrepancies of the LSI. If it is misinstalled and the power is turned on, the LSI may be damaged. It also may be damaged if it is shorted by a foreign substance coming between pins of the LSI or between a pin and a power supply or a pin and a GND. (7) Operation in strong magnetic fields Adequately evaluate use in a strong magnetic field, since there is a possibility of malfunction. (8) Serial control For the CL and DA terminals, the patterned and other wirings should be routed not to cause interference with the analog-signal-related lines. (9) About power ON/OFF (a) At power ON/OFF, a shock sound will be generated and, therefore, use MUTE on the set. (b) When turning on power supplies, VEE and VCC should be powered on simultaneously or VEE first; then followed by VCC. If the VCC side is started up first, an excessive current may pass VCC through VEE. (10) Function switching For the functions except master volume, use MUTE on the set. (11) Reduction of switching noise when changing volume from -3dB to -4dB In order to reduce switching noise when changing volume from -3dB to -4dB, after switching the switch of -4dB step, change the switch of -1dB step by -1dB. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/9 2010.06 - Rev.A BD3812F ●Thermal derating characteristic 500 450mW Technical Note 400 Power Dissipation Pd （mW) 300 200 100 0 0 25 50 Ta( ℃) 75 100 125 Fig.8 BD3812 ROHM standard board packaging time value Board size : 70 x 70 x 1.6mm Raw material : FR4 glass epoxy board (copper area 3% or below) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 8/9 2010.06 - Rev.A BD3812F ●Ordering part number Technical Note B D 3 Part No. 8 1 2 F - E 2 Part No. Package F:SOP14 Packaging and forming specification E2: Embossed tape and reel SOP14 8.7 ± 0.2 (MAX 9.05 include BURR) 14 8 Tape Quantity Direction of feed 0.3MIN Embossed carrier tape 2500pcs E2 The direction is the 1pin of product is at the upper left when you hold 6.2 ± 0.3 4.4 ± 0.2 ( reel on the left hand and you pull out the tape on the right hand ) 1 7 0.15 ± 0.1 1.5 ± 0.1 0.11 1.27 0.4 ± 0.1 0.1 1pin (Unit : mm) Direction of feed Reel ∗ Order quantity needs to be multiple of the minimum quantity. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 9/9 2010.06 - Rev.A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. 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