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| YDA137 D- 2 STEREO 5W DIGITAL AUDIO POWER AMPLIFIER Overview YDA137 (D-2) is a high efficient digital audio power amplifier IC that operates on a single 5V power supply. With YDA137 in BTL connection, an audio power amplifier with a maximum output of 5W (RL=2)x2ch can be configured with one chip. YDA137 converts an input analog data into a digital pulse by the digital modulation circuit in the IC and outputs a high current digital pulse from the output buffer circuit. This digital pulse signal is converted into an audio signal by an external low-pass filter and is output to the speaker. Low-distortion rate characteristics and high S/N ratio are realized as a digital amplifier among same class, by adopting Yamaha's unique modulation system. In addition, class AB headphone amplifier with output of 20mW (RL=16)x2ch is embedded and switching between digital amplifier output and headphone amplifier output can be done by the control of terminal termination. YDA137 has the over-current protection function for speaker terminals, the high-temperature protection function for IC, and the pop noise rejection function. IC operation can be restricted by the two control signals of /SLEEP and /MUTE. /SLEEP signal can stop all functions and decrease the consumption power to a minimum. In addition, /MUTE signal can pull-down the output buffer (hereinafter, described as WL) and make the output mute. Features High Output Power 5.0 W VDD=5.0V, RL=2, THD+N<10% 3.7 W VDD=5.0V, RL=3, THD+N<10% 3.0 W VDD=5.0V, RL=4, THD+N<10% High Efficient Operation 75 % VDD=5.0V, RL=2, Po=5W 80 % VDD=5.0V, RL=3, Po=3W Low Distortion Rate (THD+N) 0.03 % 1kHz, RL=2, Po=2.5W 0.02 % 1kHz, RL=3, Po=1.5W High S/N Ratio 105dB VDD=5.0V, input sensitivity 1.0Vrms, RL=2, Po=5W 98dB VDD=5.0V, input sensitivity 150mVrms, RL=2, Po=5W IC Low Consumption Current 25 mA VDD=5.0V, no signal (no filter) 10 mA VDD=5.0V, at mute 1 A VDD=5.0V, at sleep CS(Channel Separation) 80dB 1kHz Class AB headphone amp. is embedded. 20mW VDD=5.0V, RL=16, THD+N<1.0% Arbitral gain setting with external resistor is possible. Sleep function by /SLEEP terminal Output mute function by /MUTE terminal Output Over-Current Protection Function (Ground short-circuit/Load short-circuit) Over-Temperature Protection Function Auto Resume Function from Over-Current, High-Temperature Protection. Monaural Function by /MONO terminal Pop Noise Rejection Function at power-up or power-cutoff. Analog input / BTL(Bridge-Tied Load) output 28pin plastic TSSOP pin lead plating with Pd-free (YDA137-AZ) YDA137 CATALOG CATALOG No.:LSI-4DA137A30 2005.1 YDA137 Terminal configuration VSS /MUTE /MONO VDDL VSSPL2 OUTPL VDDPL OUTML VSSPL1 HPOL VPL INL VREFL VSSL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 /SLEEP /PROT HP VDDR VSSPR2 OUTPR VDDPR OUTMR VSSPR1 HPOR VPR INR VREFR VSSR <28pin TSSOP Top View> Terminal functions No. Name I/O Function 1 VSS Ground terminal for reference power supply 2 /MUTE I Mute control terminal 3 /MONO I Monaural control terminal 4 VDDL L-ch power supply terminal for control stage 5 VSSPL2 L-ch ground terminal for output stage 6 OUTPL O L-ch PWM signal output terminal for positive side 7 VDDPL L-ch power supply terminal for output stage 8 OUTML O L-ch PWM signal output terminal for negative side 9 VSSPL1 L-ch ground terminal for output stage 10 HPOL OA L-ch headphone output terminal 11 VPL OA L-ch first stage operational amplifier output terminal 12 INL IA L-ch analog signal input terminal 13 VREFL OA L-ch reference voltage output terminal 14 VSSL L-ch ground terminal for control stage 15 VSSR R-ch ground terminal for control stage 16 VREFR OA R-ch reference voltage output terminal 17 INR IA R-ch analog signal input terminal 18 VPR OA R-ch first stage operational amplifier output terminal 19 HPOR OA R-ch headphone output terminal 20 VSSPR1 R-ch ground terminal for output stage 21 OUTMR O R-ch PWM signal output terminal for negative side 22 VDDPR R-ch power supply terminal for output stage 23 OUTPR O R-ch PWM signal output terminal for positive side 24 VSSPR2 R-ch ground terminal for output stage 25 VDDR R-ch power supply terminal for control stage 26 HP I Headphone control terminal 27 /PROT O Protection detection terminal 28 /SLEEP I Sleep control terminal Note I: Digital input terminal, O: Digital output terminal, IA: Analog input terminal, OA: Analog output terminal 2 YDA137 Block diagram VDDPL VREFL 13 + + - INL 12 Balanced Digital Modulation Unit ( L-ch ) 6 OUTPL VSSPL2 VDDPL VPL 11 Headphone Amplifier (L-ch) VSSPL1 8 OUTML 10 HPOL /MUTE /MONO HP /SLEEP /PROT 2 3 26 28 27 Pop Noise Rejection Over Temperature Detection Control Block Over Current Detection 19 VDDPR HPOR Headphone Amplifier (R-ch) VPR 18 23 OUTPR INR 17 + + VREFR 16 Balanced Digital Modulation Unit ( R-ch ) VSSPR2 VDDPR 21 OUTMR VSSPR2 3 YDA137 Description of terminal functions Hereafter, in the description, L and H in /SLEEP terminal, /MUTE terminal, /MONO terminal, and HP terminal indicate VIL and VIH respectively, and L and H in /PROT terminal, OUTPL terminal, OUTML terminal, OUTPR terminal, and OUTMR terminal indicate VOL and VOH respectively. In addition, WL indicates weak ground output, and RF indicates reference level output. Power Supply Terminals, Ground Terminals VDDL, VSSL, VDDR, VSSR (Pin No.4, 14, 25, 15) VDDL, VSSL terminal is a 5.0V power supply terminal, a ground terminal respectively for L channel signal processing circuit. VDDR, VSSR terminal is a 5.0V power supply terminal, a ground terminal respectively for R channel signal processing circuit. L channel, R channel has independent power supply terminal and ground terminal respectively. All ground terminals are connected to the board (low resistance), but power supply terminals for L, R are separated. VDDPL, VSSPL1, VSSPL2, VDDPR, VSSPR1, VSSPR2 (Pin No.7, 9, 5, 22, 20, 24) VDDPL, VSSPL1, VSSPL2 terminal is a 5.0V power supply terminal, ground terminals respectively for L channel digital amplifier output and L channel headphone amplifier output. VDDPR, VSSPR1, VSSPR2 terminal is a 5.0V power supply terminal, ground terminals respectively for R channel digital amplifier output and R channel headphone amplifier output. L channel, R channel has independent power supply terminal and ground terminal respectively. All ground terminals are connected to the board (low resistance), but power supply terminals for L, R are separated. Voltage is supplied to VDDL, VDDR, VDDPL, and VDDPR terminal to the same timing. VSS (Pin No.1) VSS terminal is a ground terminal for protection circuit and control circuit. Analog Terminals INL, VPL, INR, VPR (Pin No.12, 11, 17, 18) INL, VPL terminal is an analog signal input terminal, a gain setting terminal respectively for L channel digital amplifier. INR, VPR terminal is an analog signal input terminal, a gain setting terminal respectively for R channel digital amplifier. Simple filter such as a low frequency boost can be configured by using an operational amplifier for the first gain setting. These terminals are combined with an input for headphone amplifier. VREFL, VREFR (Pin No.13, 16) VREFL terminal is a reference voltage output terminal for L channel. Half of 5.0V power supply terminal (VDDL) voltage is output. VREFR terminal is a reference voltage output terminal for R channel. Half of 5.0V power supply terminal (VDDR) voltage is output. Connect a necessary capacitance (See the item of "Pop Noise Rejection Function") to each reference voltage output terminal to make the voltage stable. OUTPL, OUTML, OUTPR, OUTMR (Pin No.6, 8, 23, 21) OUTPL, OUTML terminal is a digital amplifier output terminal for L channel. PWM modulated digital pulse signal is output. OUTPL is a positive output terminal, and OUTML is a negative output terminal. OUTPR, OUTMR terminal is a digital amplifier output terminal for R channel. PWM modulated digital pulse signal is output. OUTPR is a positive output terminal, and OUTMR is a negative output terminal. Since both channels are specified as BTLBridge-Tied Load output, negative output terminal is not in the ground potential. In addition, connect these to the speaker through a LC filter according to the example of application circuit to reject carrier frequency. HPOL, HPOR (Pin No.10, 19) HPOL terminal is a headphone output terminal for L channel. HPOR terminal is a headphone output terminal for R channel. 4 YDA137 Digital Terminals /SLEEP (Pin No.28) /SLEEP terminal is a sleep control terminal. It controls digital amplifiers and headphone amplifiers for both L and R channels at the same time. When /SLEEP terminal is L, all IC functions are stopped to enter the sleep state (hereinafter described as Sleep Mode). When /SLEEP terminal is changed from L to H, normal operating condition is established after sufficient time (starting time) for each reference voltage to reach the regular potential. /MUTE (Pin No.2) /MUTE terminal is a mute control terminal. It controls digital amplifiers and headphone amplifiers for both L and R channels at the same time. When /MUTE terminal is L, IC enters a mute-state. hereinafter described as Mute Mode In this condition, OUTPL, OUTML, OUTPR, and OUTMR terminal become WL, and HPOL, HPOR terminal become reference level output. (hereinafter described as RF) When /MUTE terminal is H, it enters a normal operating condition. /MONO (Pin No.3) /MONO terminal is a monaural output control terminal. Digital amplifier and headphone amplifier are controlled at the same time. When /MONO terminal is L, it enters a monaural output state.hereinafter described as Monaural Mode When /MONO terminal is H, it enters a normal operating condition. HP (Pin No.26) HP terminal is a headphone control terminal. Operation switching between digital amplifier and headphone amplifier is controlled. When HP terminal is H, it enters the headphone output mode. At this time, digital amplifier enters the Mute Mode. When HP terminal is L, it enters the digital amplifier output mode. At this time, headphone amplifier enters the Mute Mode. /PROT (Pin No.27) /PROT terminal is a warning signal output terminal for over-current and Over-Temperature Detection Function. When failure is detected in either function, L is output. In normal operation, H is output. 5 YDA137 Mode setting and error detection /SLEEP /MONO OUT*R /MUTE OUT*L /PROT HPOR HPOL I L H H H H H H I X L H H H H X HP Operating Mode I X X L L H H X I X X H L H L X O H H H H H H L O WL WL PM PM WL WL WL O WL WL PM x *1 O WL RF RF RF AO AO WL O WL RF RF RF AO x *1 Sleep mode Mute mode 2 channel digital amplifier output mode 2 channel digital amplifier output monaural mode 2 channel headphone output mode 2 channel headphone output monaural mode Output protection condition WL WL WL WL Note "H" "L" "WL" "PM" "Z" "RF" "AO" : CMOS logic "H" level : CMOS logic "L" level : Weak Low weak pull-down : PWM pulse output : Hi-impedance : Reference level output : Audio signal output *1: "x" in the output terminal means undefined state. 6 YDA137 Description of functions Digital Amplifier Function YDA137 VPL (VPR) RFB VDDPL RI INL (INR) OUTPL OUTPR) LO RNP RNP Balanced Pulse Width Modulation Unit (L-ch/R-ch) VSSPL2 CO VDDPL CO OUTML OUTMR) LO RL VREFL (VREFR) CREF VSSPL1 First Operational Amplifier Stage Digital Amplifier Stage Amplifier function block diagram Amplifier Section of YDA137 is composed of the first operational amplifier stage and the latter digital amplifier stage. Gain of the first operational amplifier can be set by connecting input resistor (RI) and feedback resistor (RFB) externally. In digital amplifier stage, digital amplifier output is feed-backed to the modulation circuit, and low distortion rate is realized. Digital amplifier output is connected to a speaker through the 2nd-order low-pass filter consisting of inductance (Lo) and capacitance (Co). This eliminates carrier frequency content existing at the digital amplifier output, consequently only audio signal is sent to a speaker. Gain Setting Gain of the first operational amplifier can be calculated by the following formula. Gain of a internal digital amplifier is 8.0dB. Gain 20xlog(RFB/RI) dB (Using RI and RFB. ConditionsRI >2k) 8.0dB First operational amplifier stage Digital amplifier stage In the application circuit example, RI=33k, RFB=39k, total gain (Av) can be calculated by the following formula. In this setting value, input sensitivity is 1Vrms, the maximum output could be obtained at 1Vrms input. When input sensitivity is set to 150mVrms, it is set as RI=4.7k and RFB=39k. Av(dB) = 20xlog(39/33) + 8 = 9.5 (dB) In gain setting of the first operational amplifier stage, it is necessary to obey the restriction that is described in the "Pop Noise Rejection Function." In addition, feed back resistor (RFB) needs to be 10k or over because of the restriction on operational amplifier drive capability. 7 YDA137 The following "low-frequency boost filter circuit " can be configured by using the first operational amplifier stage. This filter has frequency characteristics as shown in the following "low-frequency boost filter characteristics", and boost gain (Ab), turn-over frequency (fb), and turn-over frequency gain (At) to the first operational amplifier gain(Av) are found by the following formulas. Ab(dB) = 20xlog((RFB+RB)/RFB) fb(Hz) = 1/2xxRBxCB At(dB) = 20xlog(1+RB/(21/2xRFB)) In the application circuit example, high-cut capacitance (CFB) is added for input signal band restriction. The value can be adjusted as necessary. (cut-off frequency is 1/(2xxCFBxRFB) In addition, DC-cut capacitance (CI) is added for input DC current limitation. This capacitance and input resistance (RI) make a low-cut filter. Set a cut-off frequency low enough Cut-off frequency is 1/(2xxCIxRI). Selection of Coil for an output filter Cut-off frequency (fc) of LC low-pass filter that is connected to the digital amplifier output can be found by the following formula. In addition, to obtain the ideal frequency characteristics, select 0.7 or so for Q value of LCR resonance circuit. Fc (Hz) = 1/(2xx(LoxCo)) Q = (RL/2)x(Co/Lo) =0.7 Generally, cut-off frequency is selected to 50kHz, and the following values are used according to the speaker impedance. RLload impedance Loinductance Cocapacitance 2 4.7H 2.2F 3 6.8H 1.5F 4 10H 1F Distortion rate or sound quality may change depending upon the type of coil to use. In addition, select appropriate coils according to the necessary characteristics. Measure against ringing of output terminal When ringing with big peak voltage has occurred for the output terminal, IC may incorrect-operate, or IC may be damaged. Perform the measure against ringing by adding capacitor between a VDDPL and VSSPL1 terminals, between VDDPL and VSSPL2 terminals, between VDDPR and VSSPR1 terminals, between VDDPR and VSSPR2 terminal. A ceramic capacitor (4.7F) with the sufficient frequency characteristic should be used for the adding capacitor, and if possible, it should set near the terminal. Even if it performs the above measure, when ringing occurs, add a resistor (Rrng) and a capacitor (Crng) to an output terminal like the application circuit example. As a standard of the measure against ringing, adjust a constant so that a peak voltage value becomes less than 9V. 8 YDA137 Over-Current Protection Function Over-Current Protection Function is a function to detect the over-current condition and protect IC, when excessive current flows in the digital amplifier output terminal for a given period. At this time, in the internal of IC, digital amplifier output terminal and headphone output terminal becomes WL and L is output from /PROT terminal. (hereinafter described as Protection Mode) Once entering in the Protection Mode by the over-current protection, the Protection Mode is not canceled even after over-current condition is over. The Protection Mode can be canceled by setting L to /SLEEP terminal once and again setting H to the terminal or, by turning on the power supply again. It is possible to resume automatically from the Protection Mode by connecting between /PROT terminal and /SLEEP terminal as shown in the diagram below (External automatic resume circuit). /PROT /SLEEP YDA137 Fig-4 External Automatic Resume Circuit In Sleep Mode (/SLEEP=L) and Mute Mode (/MUTE=L), Over-Current Detection Function of both L and R channel stops. This IC can detect the over-current state according to the VSS short circuit of a speaker terminal (after LC filter) and the short circuit between terminals. In addition, this IC does not correspond to detect the over-current state according to between the VDD short circuit of a speaker terminal, the VSS short circuit of IC output end (before LC filter), a VDD short circuit, and the short circuit between terminals. Over-Temperature Protection Function Over-Temperature Protection Function is a function to detect the over-temperature condition and protect IC, when temperature of YDA137 goes up extraordinarily. At this time, IC enters the Protection Mode. Once entering in the Protection Mode by the over-temperature protection, IC cancels the Protection Mode by itself after the temperature of IC falls to a certain temperature. In addition, it is possible to cancel the Protection Mode by the control of /SLEEP terminal and turning on the power supply again, as well as Over-Current Protection Function. Sleep Function When /SLEEP terminal is L, it enters the Sleep Mode. When H, it enters normal operation condition. In the mode, all functions will stop and consumption power will fall to the minimum. In the mode, digital amplifier output terminal becomes WL, and headphone amplifier output terminal becomes WL. At this time, the protection mode is canceled, and /PROT terminal becomes H. When /SLEEP terminal is changed from L to H, start-up sequence operates, and it enters normal operating condition after the time set by the capacitance connected at VREFL and VREFR terminals, the input capacitance connected at INL and INR terminals, and input resistance elapsed (Starting-time). General time is shown in the table. Table: Starting-time CREF capacitance 33F 33F 33F CIN capacitance 4.7F 10F 33F Input sensitivity 1.0Vrms 1.0Vrms 1.0Vrms Starting time 1.8 sec 3.0 sec 7.5 sec 9 YDA137 Output Mute Function When /MUTE terminal is L, it enters the Mute Mode. When /MUTE terminal is H, it enters normal operation condition. In Mute Mode, consumption current can be decreased and setting and release can be performed in an instant. In the mode, digital amplifier output terminal becomes WL, and headphone amplifier output terminal becomes RF. In addition, Over-Current Detection Function stops in the mode. Mute Mode in YDA137 points out the state where changed the inside of IC into the standby state, and output disabled. For this reason, minute pop noise may occur under the influence of output offset voltage. Pop Noise Rejection Function A function to reject pop noise caused by power-on, power-off, Sleep Mode setting, and its cancellation is equipped. In power-on, YDA137 operates the start-up sequence after supply voltage (VDDL, VDDR) surpasses each threshold voltage for low voltage malfunction prevention (VUVH). In the start-up sequence, pop noise can be rejected, because the Mute Mode is canceled after input signal terminal (INL, INR) potential and voltage reference terminal (VREFL, VREFR) potential have been stable sufficiently (after the Starting-time has elapsed). Also in the cancellation of the Sleep Mode, pop noise can be rejected by the start-up sequence as well as that in the power-on. When a power supply is power-off, a pop noise is rejected by detect power supply change and mute output. It is necessary to set each value to these elements to operate Pop Noise Rejection Function effectively in the power-on. The values are found by the following formula, with a capacitance value (CREF) for VREFL terminal and VREFR terminal, a resistor value (RI) and capacitance value (CI) for INL terminal and INR terminal. CREF RI x CI / 5000 (Input sensitivity=150mVrms) CREF RI x CI / 22000 (Input sensitivity=1Vrms) CREF is recommended to 10F. CREF is recommended to 10F. Malfunction Prevention Function for Low Voltage This is a function to stop the operation to prevent malfunction when supply voltage falls for some reason. In YDA137, operation stops when supply voltage falls to operation stop voltage (VUVL) or lower. In addition, operation starts again, when supply voltage goes up to start-up voltage (VUVH) or over. Malfunction Prevention Function for Power Supply Fluctuation This is a function to prevent malfunction when supply voltage fluctuates falls rapidly for some reason. In the digital amplifier output, it enters the Mute Mode to prevent a malfunction when supply voltage falls/rises to the fall fluctuation protection voltage (VML) or lower, or the rise fluctuation protection voltage (VMH) or over. Moreover, in the headphone output, it enters the Mute Mode to prevent it when supply voltage rises to VMH or over, and headphone output stage becomes WL to prevent a malfunction, when supply voltage falls to VML or lower. Monaural Output Function When /MONO terminal is L, it enters the Monaural Mode. When H, it enters the stereo mode. In the Monaural Mode, input signal is input from L channel input terminal and is output from L channel output terminal. At this time, R channel output terminal becomes unfixed. In addition, when YDA137 is used only a monaural output (L channel) fixes, the following change is made to the application circuit example. It is not necessary to connect each resistance, the capacity, and the coil for filters of the R channel side. Terminal processing when use by monaural output fixation. Pin No. Name Terminal processing Pin No. 3 /MONO Connect to ground 20 15 VSSR Connect to ground 21 16 VREFR Non connection 22 17 INR Non connection 23 18 VPR Non connection 24 19 HPOR Non connection 25 Name VSSPR1 OUTMR VDDPR OUTPR VSSPR2 VDDR Terminal processing Connect to ground Non connection Connect to 5V power supply Non connection Connect to ground Connect to 5V power supply 10 YDA137 Headphone Amplifier Function Analog Input CI INL/R RI Rsw= 400 ENB 19.6k 30k 30k HPOL/R VREFL/R VREFL/R Headphone Amplifier Circuit When setting H to HP terminal, it enters headphone amplifier output mode. At this time, the digital amplifier enters the Mute Mode. Headphone amplifier section is comprised of the first stage operational amplifier and a class AB single-end output amplifier. In the first stage operational amplifier section, gain can be set by connecting an input resistor RI externally. The latter stage is a high current output amplifier applicable to 16 load. VREF terminal voltage (vias) is applied to the headphone amplifier output, so that connect the output to headphone through AC coupling capacitor, as shown in the application circuit example. Gain Setting Gain of the first inverting amplifier can be calculated according to the following formula. In addition, class AB amplifier gain is 0dB. AVHP = 20xlog10(19.6k / (RI + 400)) 4.7kis selected as an input resistor RI, and total gain is set to 11.7dB. In this setting, 150mVrms input can yield the maximum output of 20mW. Relation between an external resistor value and output level in typical input sensitivity is shown in the table below. Input Sensitivity External input resistor RI External feedback resistor RFB for digital amplifier Digital amplifier output (RL=3) Headphone amplifier output (RL=16) 150mVrms 4.7k 39k 3.14Vrms (3.28W or so) 0.566Vrms (20.0mW) 1.0Vrms 33k 39k 2.98Vrms (2.96W or so) 0.586Vrms (21.4mW) 2.0Vrms 68k 43k 3.19Vrms (3.38W or so) 0.573Vrms (20.5mW) A low cutoff frequency is found by the following formula with an AC coupling capacitor (CHO) and a load resistor (RHO) of the headphone amplifier. fCHP = 1 (2xxCHOxRHO) RHOload resistor Headphone Amplifier Switching Function By making up a headphone circuit as shown in the application circuit example, two modes can be switched automatically according to the existence of headphone. 11 YDA137 Application circuit example 12 YDA137 Precaution for mounting Thermal Pad for heat radiation is carried in the package backside of YDA137. Sufficient heat radiation effect is acquired by creating a land pattern like following "Land pattern example of Thermal Pad connection" and soldering "Thermal Pad" of YDA137 on the printed circuit board which mounts YDA137. In addition, heat radiation to backside of the printed circuit board can be effectively performed by preparing a through hole on a printed circuit board. Application notes Warning for the device which makes sound using speaker A speaker radiates heat in a voice-coil by air flow accompanying vibration of an oscillating board. When DC signal (several Hz or less) is inputted, heat radiation characteristics falls rapidly. In addition, even if it is used lower than rated input, it may lead to disconnection of a voice-coil, emitting smoke or ignition of a speaker. In order to avoid such situations, be sure to implement one or more preventive measures from the following. 1. Do not select a setup (sound production) which may generate DC signal. (Since thoroughness of this preventive measure is generally difficult, we recommends the combined use with the following 2, 3, and 4) 2. Add a DC cut digital filter for cutting DC signal into a digital section. (As long as "Built-in" is not mentioned in the manual, there is no such built-in circuit inside of a device). 3. Add a DC cut capacitor for cutting DC signal into an analog section. (When addition is specified in the example of a recommended circuit diagram, be sure to add) 4. When a latter stage device exists in the signal path from this device to speaker, DC cut is realized in a latter stage device. In addition, the above-mentioned measures are made that the device it-self, DC cut condenser, and a latter stage device will be in a normal operation. Therefore, it is also necessary to implement the safety measures supposing failure of these parts separately. 13 YDA137 Electrical characteristics Absolute Maximum Ratings Note 5) Item VDD terminal voltage range Note 1, 2, 3) Input/Output terminal voltage range Note 4) Allowable dissipation (Ta=25) Storage Temperature Note Note Note Note Note Symbol VDD VIN PD TSTG Min. -0.3 VSS-0.5 -50 Max. 6.0 VDD+0.5 3.0 125 Unit V V W 1) VSS means VSSL, VSSR, VSSPL1, VSSPL2, VSSPR1, and VSSPR2. Place all VSS terminals in the same potential. 2) The voltage is based on VSS=0V. 3) VDD terminal means VDDL, VDDR, VDDPL, and VDDPR. 4) Input/output terminal means /SLEEP, /MUTE, /PROT, HP, /MONO, INL, VPL, VREFL, INR, VPR, and VREFR. 5) Absolute Maximum Ratings is values which must not be exceeded to guarantee device reliability and life, and when using device in excess even a moment, it may cause damage to device or deteriorate its reliability severely. Note 7) Recommended Operating Condition Item Power Supply Voltage Note 6) Operating Ambient Temperature Speaker Impedance Headphone Impedance Symbol VDD Ta RL RLHP Min. 3.0 -40 2 16 Typ. 5.0 25 Max. 5.25 85 Unit V Note 6) The voltage is based on VSS=0V. Note 7) When using in outside of aforementioned voltage range, IC may cause malfunction and may cause noise at the speaker output as system, and other problems, etc. DC Characteristics (VSS=0V, VDD=3V to 5.25V, Ta=-40 to 85, unless otherwise specified) Item /PROT High level output voltage(IOH=-80A) /PROT Low level output voltage (IOL=1.6mA) /SLEEP, /MUTE, /MONO, HP High level input voltage /SLEEP, /MUTE, /MONO, HP Low level input voltage Power supply: Threshold Voltage for Low voltage Malfunction Prevention Power supply: Threshold Voltage for operation start Malfunction prevention threshold voltage for power supply fluctuation (fall) Malfunction prevention threshold voltage for power supply fluctuation (rise) Consumption Current (Sleep Mode) VDD Consumption Current (Mute Mode) VDD Consumption Current (No-signal, VDD No filter) Consumption Current (No-signal, VDD Headphone output) Symbol VOH VOL VIH VIL VUVL VUVH VML VMH ISLEEP IMUTE IDDD IDDH 2.5 2.8 1.54xVREF 2.42xVREF 1 10 25 10 Min. 0.8xVDD 0.7xVDD 0.3xVDD Typ. Max. VSS+0.4 Unit V V V V V V V V A mA mA mA AC characteristics (VSS=0V, VDD=5V, Ta=25, unless otherwise specified) Item Oscillation Frequency Symbol FC Min. Typ. 800 Max. Unit kHz 14 YDA137 Typical analog characteristics Analog Characteristics Note 8) (VSS=0V, VDD=5V, Ta=25, Frequency:1kHz, RI=33k, RFB=39k, unless otherwise specified) Digital Amplifier Section Item Maximum Output (THD+N=10%) Voltage Gain RL=2 RL=3 RL=4 Condition Symbol PD AV THD+N Min. Typ. 5.0 3.7 3.0 9.5 0.03 0.02 105.0 Max. Unit W W W dB % % dB dB dB % % mV Total Harmonic Distortion Rate RL=2, PO=2.5W (BW: 20kHz) RL=3, PO=1.5W Signal /Noise Ratio (BW:20kHz A-Filter) Channel Separation Ratio Maximum Efficiency Output Offset Voltage RL=2, PO=5W RL=3, PO=3W RL=2, PO=5W, 1Vrms input sensitivity Note 9) RL=2, PO=5W, 150mVrms input sensitivity Note 9) SNR 98.0 CS Vo 80 75 80 10 Note 8) All values of analog characteristics are obtained on the Yamaha's evaluation environment. Depending upon coil, capacitor, and pattern layout to use, characteristics may be changed. Note 9) 1Vrms input sensitivity means a setting from which maximum output is obtained at 1Vrms input, and here, RI=33k and RFB=39k. Likewise, 150mVrms input sensitivity means a setting from which maximum output is obtained at 150mVrms input, and here, RI=4.7k and RFB=39k. Headphone Amplifier Section Item Maximum Output (THD+N=1.0%) Total Harmonic Distortion Rate (BW:20kHz ) RL=16 Condition Symbol Pho Min. Typ. 20.0 Max. Unit mW RL=16, PO=10mW RL=16, PO=20mW, 1Vrms input sensitivity Note 9) RL=16, PO=20mW, 150mVrms input sensitivity Note 9) THD+N 0.25 97.0 % dB Signal /Noise Ratio (BW: 20kHz A-Filter ) VN 90.0 CS 80 dB dB Channel Separation Ratio RL=16 15 YDA137 Typical characteristics examples Power vs THD+NVDD=5.0V 10 2, Lch 3, Lch 4Lch Power vs THD+NVDD=3.0V 10 2, Lch 3, Rch 4, Lch 1 THD(%) THD(%) 0.1 1 0.1 0.01 0.001 0.01 0.1 Output power(W) 1 10 0.01 0.001 0.01 0.1 Output power(W) 1 10 Frequency vs THD+NVDD=5.0V 1 2, Lch 2, Rch Frequency vs THD+NVDD=3.0V 1 2, Lch 2, Rch 0.1 THD(%) THD(%) 0.01 0.1 0.01 0.001 10 100 1000 Frequency(Hz) 10000 100000 0.001 10 100 1000 Frequency(Hz) 10000 100000 Efficiency vs. PowerVDD=5V 90 85 80 Efficiency(%) Efficiency(%) 75 70 65 60 55 50 0.0 1.0 2.0 3.0 Output power(W) 4.0 5.0 RL=2 RL=3 RL=4 Efficiency vs. PowerVDD=3V 90 85 80 75 70 65 60 55 50 0.0 0.5 1.0 Output power(W) 1.5 2.0 RL=2 RL=3 RL=4 16 YDA137 Frequency characteristicsRL=2, VDD=5.0V 0 -1 dBV dBV -2 -3 -4 -5 10 100 1000 Frequency(Hz) 10000 100000 0 -1 -2 -3 -4 -5 10 100 1000 Frequency(Hz) 10000 100000 Frequency characteristicsRL=2, VDD=3.0V Cross talk(VDD=5V) -50 LchRch Cross talk(VDD=3.0V) -50 LchRch -60 -70 dBV RchLch -60 -70 dBV -80 -90 -100 -110 -120 RchLch -80 -90 -100 -110 -120 10 100 1000 Frequency(Hz) 10000 100000 10 100 1000 Frequency(Hz) 10000 100000 Output nise spectrumVDD=5.0V, 40kHz LPF Output nise spectrumVDD=3.0V, 40kHz LPF 0 -20 -40 -60 dBV dBV -80 -100 -120 -140 -160 10 100 1000 Frequency(Hz) 10000 100000 Lch Rch 0 -20 -40 -60 -80 -100 -120 -140 -160 10 100 1000 Frequency(Hz) 10000 100000 Lch Rch 17 YDA137 Maximum output vs Power supply 7 Output at 10% distortion(W) 6 5 4 3 2 1 0 3 3.5 4 VDD(V) PSRR(VDDPL , VDDPR=5.0V) 0 Lch Rch 2 3 4 4.5 5 5.5 PSRR(VDDPL , VDDPR=3.0V) 0 Lch Rch -20 PSRR(dBV) PSRR(dBV) -20 -40 -40 -60 -60 -80 -80 -100 10 100 1000 10000 100000 Signal frequency added to power supply(Hz) PSRR(VDDL , VDDR=5.0V) 0 Lch Rch -100 10 100 1000 10000 100000 Signal frequency added to power supply(Hz) PSRR(VDDL , VDDR=3.0V) 0 Lch Rch -20 PSRR(dBV) PSRR(dBV) 10 100 1000 10000 Signal frequency added to power(Hz) 100000 -20 -40 -40 -60 -60 -80 -80 -100 -100 10 100 1000 10000 Signal frequency added to power(Hz) 100000 18 YDA137 Package outline 19 YDA137 Notice The specifications of this product are subject to improvement changes without prior notice. |
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