SM7153 SAMHOP | Alldatasheet
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FEATURES
- 0dB to -66dB attenuation controlled by 2dB/step * 2 channels built in * High voltage CMOS technology operating voltage range: VCC=6 ~ 12V APPLICATION Audio Equipment Volume Control. PIN ASSIGNMENT Page 1 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 /i0/i0 /i0/i0 Vss L-OUT1 L-IN1 A-GND L-IN2 L-OUT2 INH DCO VDD R-OUT1 R-IN1 A-GND R-IN2 R-OUT2 U/D OSC SM7153 BLOCK DIAGRAM OSC CONSTANT CURRENT CIRCUIT U/D VDD VSS CK CK A-SW A-SW A-SW A-SW A-SW A-SW A-SW CKA-SW A-SW A-SW A-SW A-SW A-SW CK CK A-SW A-SW A-SW A-SW A-SW A-SW A-SW CK A-SW A-SW A-SW A-SW A-SW A-SW 7bit LATCH CIRCUIT 7bit LATCH CIRCUIT 6bit LATCH CIRCUIT 6bit LATCH CIRCUIT L-OUT2 L-IN2 A-GND VDD INH AUTO INITIALISE CIRCUIT INT U/D CK U/D CK INT7 BITS BI-DIRECTIONAL SHIFT REGISTER
6 BITS
8 DCO
V.1.0 SM7153 SAMHOP Microelectronics Corp. /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 ELECTRONIC VOLUME CONTROLLER
10dB/step attenuator outputs. A signal applied to IN is attenuated in 7 steps from 0dB to 60dB at 10dB/step. L-IN1 R-IN1 10dB/step attenuator inputs 7 INH Inhibit terminal. When this terminal is at ' L ' level, all input/ output cut off and the SM7153 is placed in the inhibit state. When at ' H ' level, the SM7153 operates normally. 8 DCO DC current output for displaying attenuation. 9 OSC C, R connecting terminal for the oscillator. up/down speed of attenuation is decided by the attenuation up/down control oscillator according to this time constant.
13 A-GND Analog ground terminal
2 dB/step attenuator inputs L-OUT2 R-OUT2 2 dB/step attenuator inputs A signal applied to IN is attenuated in 5 steps from 0dB to 8dB at 2 dB/step.
1 VSS Negative Power Supply
10 U/D Attenuation up/down control input terminal. When this terminal is at ' H ' level, sound volume is increased synchronising with rise of the oscillator. Conversely, when this pin is at ' L ' level, sound volume is decreased.
16 VDD Positive Power Supply (Substrate)
V.1.0 SM7153 SAMHOP Microelectronics Corp. /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 ELECTRONIC VOLUME CONTROLLER
(1) Setting Of Attenuation After power on, attenuation is automatically set at -40dB. Figure 2 V.1.0 When the UP key is pressed after power ON, the U/D terminal is placed in the up state at ' H ' level, and the oscillator is actuated. When the DOWN key is pressed, t DOWN key is pressed, and the oscillator is actuated in the down state and therefore, attenuation is decreased. Oscillation frequency is decided by Cx and Rx. fosc ≒ (Hz) (Rs≧3Rx)
0.7 Cx * Rx
RX=33 KΩ CX=4.7µF RS=100 KΩ - 2.2uF OSC -30dB -32dB -34dB -36dB -38dB -40dB SM7153 SAMHOP Microelectronics Corp. /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 ELECTRONIC VOLUME CONTROLLER
(2) Attenuation Display Output The SM7153 is provided with the DC current output terminal for displaying attenuation. With 0dB ~ Ü divided into 13 steps, current of approx. 100µA/step is transmitted. TABLE 1 Step DCO I = 100DŽA + 30DŽA 2 x I 3 x I 4 x I 5 x I 6 x I 7 x I 8 x I 9 x I 10 x I 11 x I 12 x I 13 x I Attenuation -64 dB ~ Ü -60dB ~ -62dB -54dB ~ -58dB -50dB ~ -52dB -44dB ~ -48dB -40dB ~ -42dB -34dB ~ -38dB -30dB ~ -32dB -24dB ~ -28dB -20dB ~ -22dB -14dB ~ -18dB -10dB ~ -12dB -4dB ~ -8dB 0dB ~ -2dB STEP 0 ABOUT 100mV + 30mV VSS ABOUT 1.3V Figure 3 1KΩ VSS When high precision is required, use a variable resistor as a load resistor. V.1.0 SM7153 SAMHOP Microelectronics Corp. /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 ELECTRONIC VOLUME CONTROLLER
MAXIMUM RATINGS (TA=25oC)
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, VDD=12V, VSS=0V, Ta=25oC) V.1.0 Supply Voltage Supply Current Stand-by Current Parameter Symbol Min. Typ. Max. UnitTest Condition Attenuator 1 resistor (10dB / step) Attenuator 2 resistor (2dB / step) Input Voltage ' H ' LEVEL ' L ' LEVEL Attenuation Error Max input Amplitude Max clock Frequency Min clock Width VDD=4V,INH=L INH, U/D Terminal R-IN1 -A-GND (L-IN1) R-IN2 -A-GND (L-IN2) Biase 0V 0.8VDD VSS-0.3 300 VDD+0.3 VDDx0.2 4.0 100 V mA µA V KΩ KΩ dB Vrms KHz µS VDD IDD IB VIH VIL RATT-1 RATT-2 Vin fck Tck Parameter Supply Voltage Input Voltage Power Dissipation Operating Temperature Symbol Ratings Unit VDD VIN PD Topr Tstg VSS-0.3 ~ VDD+0.3 150 -20 ~ +75 -40 ~ +125 V V mW Storage Temperature SM7153 SAMHOP Microelectronics Corp. /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 ELECTRONIC VOLUME CONTROLLER
APPLICATION CIRCUIT (L-ch Only) 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 19 SM7153 INPUT OUTPUT GND 1µF 1µF Vss -6V VDD +6V 1µF 680KƸ 120KƸ 1µF 10µF 82KΩ 470KΩ 27pF TA75558P 2 8 10K 10µF 10µF CX RS 1N4148 1µF RX UP SW DOWN SW 1N4148 V.1.0 SM7153 SAMHOP Microelectronics Corp. /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0 /i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0/i0 ELECTRONIC VOLUME CONTROLLER