DATA BULLETIN MX019 Quad Digital Control Amplifier FEATURES APPLICATIONS 4 Digitally Controlled Amplifiers 15 Gain/Attenuation Steps 3 Amplifiers ± 3dB Range in 0.43dB Steps 1 'Volume' Amplifier ±14dB Range in 2dB Steps 8-Bit Serial Data Control Output Mute Function Gain Control Applications Audio Data Telecommunications, Radio, & Industrial Applications SERIAL CLOCK INPUT LOAD/LATCH 8-BIT SERIAL DATA INPUT SERIAL DATA INPUT LOAD/LATCH 3 2 4 1 Ch1 Ch4 VOLUME VSS VDD CHIP ADDRESS VBIAS 3 2 Ch2 Ch3 2 1 4 3 CONTROLLED AUDIO OUTPUT LINES The MX019 Digitally Adjustable Amplifier Array replaces trimmer potentiometers and volume controls in Cellular, LMR, Telephony and Communication applications where voice or data signals need adjustment. The MX019 is a single-chip LSI consisting of four digitally controlled amplifier stages, each with 15 distinct gain/attenuation steps. Control of each individual amplifier is by an 8-bit serial data stream. Three of the amplifier stages offer a 3dB range in steps of 0.43dB, while the remaining amplifier offers a 14dB range in steps of 2dB, and is suggested for volume control applications. Each amplifier includes a 16th 'Off' state which, when applied, mutes the output audio from that channel. This array uses a Chip Select input to select one of two MX019s in a system. The MX019 uses the host microprocessor to digitally control the set-up of all audio levels during development, production/calibration, and operation. Such applications include: 1. Control, adjustment, and set-up of communications equipment by an Intelligent ATE without manual intervention – eg. Deviation, Microphone and L/S Levels, RX Audio Level etc. 2. Automatic Dynamic Compensation of drift caused by variations in temperature, linearity, etc. 3. Fully automated servicing and re-alignment. The MX019 is a low-power, single 5-volt CMOS device available in 24-pin TSSOP (MX019TN), 16-pin SOIC (MX019DW), 16-pin CDIP (MX019J) and 16-pin PDIP (MX019P) package versions. 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 2 MX019 CONTENTS Section Page 1. Block Diagram 3 2. Signal List 4 3. External Components 5 4. General Description 5 4.1 Control Data and Timing 5 4.1.1 Data Loading 5 4.1.2 Timing 7 5. Application 8 6. Performance Specification 8 6.1 Electrical Performance 8 6.1.1 Absolute Maximum Ratings 8 6.1.2 Operating Limits 8 6.1.3 Operating Characteristics 9 6.2 Packaging 10 MX-COM, Inc. reserves the right to change specifications at any time and without notice. 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 3 MX019 1. Block Diagram SERIAL CLOCK INPUT LOAD/LATCH 8-BIT SERIAL DATA INPUT SERIAL DATA INPUT LOAD/LATCH 3 2 4 1 Ch1 Ch4 VOLUME VSS VDD CHIP ADDRESS VBIAS 3 2 Ch2 Ch3 2 1 4 3 CONTROLLED AUDIO OUTPUT LINES Figure 1: Device Block Diagram 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 4 MX019 2. Signal List Pin No. Name Description J/P DW TN 1 1 Serial Clock This external clock pulse input is used to “clock in” the Control Data. See Figure 3. This input has an internal 1M pullup resistor. 2 2 Load/ Latch This input governs the loading and execution of the control data. During serial data loading this input should be kept at a logical '0' to ensure that data rippling past the latches has no effect. When all 8 bits have been loaded, this input should be strobed '0 - 1 - 0' to latch the new data in. Data is executed on the falling edge of the strobe. If the Load /Latch input is used this pin should be left open circuit. This input has an internal 1M pullup resistor. 3 4 4 5 Ch1 Input 5 6 Ch2 Input These individual amplifier inputs are self-biasing; AC input analog signals must be capacitively coupled to these pins, as shown in Figure 2. 6 7 Ch3 Input Note that amplifiers Ch1 to Ch4 are 'inverting amplifiers.' 7 8 Ch4 Input 8 12 VSS 9 13 VBIAS 10 14 Ch4 Output Controlled Analog Outputs : 11 17 Ch3 Output These are individual "Gain Controlled" amplifier outputs. Ch1 to Ch3 range from -3dB to +3dB in 0.43dB steps, Ch4 can be utilized as a volume control, 12 18 Ch2 Output ranging from -14dB to +14dB in 2.0dB steps. In the “OFF” mode there is no 13 19 Ch1 Output output from the selected amplifier. 14 20 Chip Address A logic input to select one of two MX019 ICs in a system (see Table 1). This input has an internal 1M pulldown resistor. 15 23 Control Data Input Operation of the 4 amplifier channels (Ch1 – Ch4) is controlled by the 8 bits of data entered serially at this pin. The data is entered (bit 7 to bit 0) on the rising edge of the external Serial Clock. The data format is described in Table 1, Table 2 and Figure 3. This input has an internal 1M pullup resistor. 16 24 VDD LOAD / LATCH This inverted Load/ Latch input governs the loading and execution of control data. During serial data loading this input should be kept at a logical '1' to ensure that data rippling past the latches has no effect. When all 8 bits have been loaded, this input should be strobed '1' - '0' - '1' to latch the new data in. Data is executed on the rising edge of the strobe. If the Load/ Latch input is used this pin should be left open circuit. This input has an internal 1M pulldown resistor. 1998 MX-COM, INC. Analog Inputs : Negative supply rail (GND). The output of the on-chip bias circuitry, held at VDD/2. This pin should be decoupled to VSS as shown in Figure 2. Positive supply rail. A single +5V power supply is required. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 5 MX019 3. External Components VDD SERIAL CLOCK INPUT LOAD/LATCH LOAD/LATCH CHANNEL 1 INPUT C1 CHANNEL 2 INPUT C2 CHANNEL 3 INPUT C3 CHANNEL 4 INPUT C4 1 16 2 15 3 14 4 13 5 VSS MX019J VDD CONTROL DATA INPUT CHIP ADDRESS CHANNEL 1 OUTPUT CHANNEL 2 OUTPUT 12 6 11 7 10 8 9 C6 CHANNEL 3 OUTPUT CHANNEL 4 OUTPUT VBIAS C5 C1 to C4 0.1µF ± 20% C5 1.0µF ± 20% C6 1.0µF ± 20% Figure 2: Recommended External Components Notes: 1. Channel Amplifiers 1 to 4 are inverting amplifiers. 2. Analog input capacitors C1 to C4 are only required for AC input signals, DC input signals do not require these components. 4. General Description 4.1 Control Data and Timing The gain of each amplifier block (Channel 1 to Channel 4) in the MX019 is set by a separate 8-bit data word (bit 7 to bit 0). This 8-bit word, consisting of 4 Address bits (bit 7 to bit 4) and 4 Gain Control bits (bit 3 to bit 0), is loaded to the Control Data Input in serial format using the external data clock. 4.1.1 Data Loading The 8-bit data word is loaded bit 7 first and bit 0 last. Bit 7 must be a logic “1” to address the chip. If bit 7 in the word is a logic “0” that 8-bit word will not be executed. The Chip Address input permits the use of two devices in a system by indicating to the chip what its address is, a “1” or a “0.” Bit 6 in the address section of the control word is then used to select which device is being controlled. Figure 3 shows the timing information required to load and operate this device. Data is loaded to the MX019 on the rising edge of the Serial Clock. Loaded data is executed on the falling (rising) edge of the Load/ Latch ( Load /Latch) pulse. Table 1 shows the format of each 4-bit Address word, Table 2 shows the format of each Gain Control word with Figure 3 describing the data loading operation and timing. 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 6 MX019 Bit 7 MSB Bit 6 Bit 5 Bit 4 LSB Channel Address Chip Address 1 1 1 1 0 0 0 0 0 0 1 1 0 1 0 1 1 2 3 4 0 0 0 0 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 1 2 3 4 1 1 1 1 Chip Number Chip 1 Chip 2 Table 1: Address Bits Format Bit 3 MSB Bit2 Bit 1 Bit 0 LSB Stage 1, 2, 3 (0.43dB) Stage 4 (2.0dB) 0 0 0 0 OFF OFF 0 0 0 1 -3.0 -14.0dB 0 0 1 0 -2.571 -12.0 0 0 1 1 -2.143 -10.0 0 1 0 0 -1.714 -8.0 0 1 0 1 -1.286 -6.0 0 1 1 0 -0.857 -4.0 0 1 1 1 -0.428 -2.0 1 0 0 0 0 0 1 0 0 1 0.428 2.0 1 0 1 0 0.857 4.0 1 0 1 1 1.286 6.0 1 1 0 0 1.714 8.0 1 1 0 1 2.143 10.0 1 1 1 0 2.571 12.0 1 1 1 1 3.0 14.0 Table 2: Gain Control Bits Format 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 7 MX019 4.1.2 Timing Timing (Figure 3) Min. Typ. Max. Units Serial Clock "High" Pulse Width (tPWH) 250 ns Serial Clock "Low" Pulse Width (tPWL) 250 ns Data Set-up Time (tDS) 150 ns Data Hold Time (tDH) 50.0 ns Load/Latch Pulse Width (tLLW) 150 ns Load/Latch Delay (tLLD) 200 ns Load/Latch Over (tLLO) Serial Data Clock Frequency 0.0 ns 2.0 MHz SERIAL DATA CLOCK t PWL SERIAL DATA IN t PWH tDH t DS Next Clock Pulse 8th Clock Pulse (ONE 8-BIT WORD) Logic '1' Loaded First BIT 7 Loaded Last BIT 6 BIT 1 BIT 0 t LLD LOAD/LATCH t LLW t LLO LOAD/LATCH Figure 3: Serial Control Data Loading Diagram 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 8 MX019 5. Application To avoid excess noise and instability you should take note of the following: 1. A noisy or badly regulated power supply can cause instability and/or variance of selected gains. 2. Care should be taken on the design and layout of the printed circuit board. 3. All external components (Figure 2) should be kept close to the MX019 package. 4. Inputs and outputs should be shielded wherever possible. 5. Tracks should be kept short. 6. Analog tracks should not run parallel to digital tracks. 7. A "Ground Plane" connected to VSS will assist in eliminating external pick-up on the channel input and output pins. 8. Do not run high-level output tracks close to low-level input tracks. 6. Performance Specification 6.1 Electrical Performance 6.1.1 Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the device. General Min. Max. Units Supply Voltage -0.3 7.0 V Input Voltage at any pin (ref VSS = 0V) -0.3 (VDD + 0.3) V VDD ±30 mA VSS ±30 mA Any other pins ±20 mA 800 mW 10 mW/°C above 25°C 500 mW 9 mW/°C above 25°C Current J/P/DW Packages Total Device Dissipation @ TAMB 25°C Derating above 25°C TN Packages Total Device Dissipation @ TAMB 25°C Derating above 25°C Operating Temperature -40 85 °C Storage Temperature -55 125 °C 6.1.2 Operating Limits Correct operation of the device outside these limits is not implied. Min. Typ. Max. Units VDD 4.5 5.0 5.5 V Operating Temperature -40 85 °C 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 9 MX019 6.1.3 Operating Characteristics For the following conditions unless otherwise specified: VDD = 5.0V, TAMB = 25°C Audio Level 0dB ref. = 775mVRMS, Amplifier Gain Set = 0dB Notes Min. Typ. Max Units Static Values Supply Current 1.5 mA Dynamic Values Control Functions Input Logic '1' 3.5 V Input Logic '0' 1.5 Digital Input Impedances 0.5 1.0 V M Amplifier Stages (General) Bandwidth (-3dB) 20.0 Output Impedance kHz 1.0 k Total Harmonic Distortion 1 0.35 0.5 % Output Noise Level (per stage) 2 180.0 400.0 µVRMS Onset of Clipping 3 1.73 Gain Variation 4 VRMS 0.1 Interstage Isolation 60.0 dB dB “Trimmer” Stages (Ch1 – Ch3) Gain -3.0 Gain per Step (15 in No.) +3.0 dB 0.2 dB 0.43 dB Step Error Input Impedance 100.0 k “Volume” Stage (Ch4) Gain -14.0 Gain per Step (15 in No.) +14.0 2.0 Step Error dB 0.4 Input Impedance 50.0 dB dB k Operating Characteristics Notes: 1. Gain Set 0dB, Input Level 1kHz -3.0dB (549mVrms). 2. With an a.c short-circuit input, measured in a 30kHz bandwidth. 3. See Figure 4. 4. Over the temperature and supply voltage range. 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 60 SINAD 10 MX019 (dB) 50 Input Frequency = 1.0kHz 40 30 10.0 25.0 75.0 110.0 250.0 -30 -20 -17 -10 -40 1000.0 775.0 1730.0 mVrms 7.0 0 INPUT LEVEL dB Figure 4: SINAD vs Input Level – Typical Values 6.2 Packaging Package Tolerances A DIM. B ALTERNATIVE PIN LOCATION MARKING E L T PIN 1 Y C H J P A B C E H J L P T Y MIN. TYP. MAX. 0.311 (7.90) 0.303 (7.70) 0.169 (4.30) 0.177 (4.50) ---------0.047 (1.20) 0.248 (6.30) 0.256 (6.50) 0.002 (0.05) 0.006 (0.15) 0.007 (0.17) 0.012 (0.30) 0.020 (0.50) 0.030 (0.75) 0.0256 (0.65) 0.003 (0.08) 0.008 (0.20) 0° 8° NOTE : All dimensions in inches (mm.) Angles are in degrees Figure 5: 24-pin TSSOP Mechanical Outline: Order as part no. MX019TN 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 11 MX019 Package Tolerances A Z ALTERNATIVE PIN LOCATION MARKING B E W L T PIN 1 X Y C J H K P DIM. A B C E H J K L P T W X Y Z MIN. TYP. MAX. 0.413 (10.49) 0.395 (10.03) 0.299 (7.59) 0.286 (7.26) 0.093 (2.36) 0.105 (2.67) 0.419 (10.64) 0.390 (9.90) 0.003 (0.08) 0.020 (0.51) 0.013 (0.33) 0.020 (0.51) 0.041 (1.04) 0.050 (1.27) 0.016 (0.41) 0.050 (1.27) 0.009 (0.23) 0.0125 (0.32) 45° 0° 10° 7° 5° 5° NOTE : All dimensions in inches (mm.) Angles are in degrees Figure 6: 16-pin SOIC Mechanical Outline: Order as part no. MX019DW Package Tolerances A B E1 E Y T PIN 1 K C H L J J1 P DIM. A B C E E1 H J J1 K L P T Y MIN. TYP. MAX. 0.810 (20.57) 0.740 (18.80) 0.262 (6.63) 0.240 (6.10) 0.135 (3.43) 0.200 (5.06) 0.300 (7.62) 0.390 (9.91). 0.290 (7.37) 0.325 (8.26) 0.015 (0.38) 0.070 (1.77) 0.014 (0.35) 0.023 (0.58) 0.040 (1.02) 0.065 (1.65) 0.056 (1.42) 0.064 (1.63) 0.121 (3.07) 0.150 (3.81) 0.100 (2.54) 0.008 (0.20) 0.015 (0.38) 7° NOTE : All dimensions in inches (mm.) Angles are in degrees Figure 7: 16-pin PDIP Mechanical Outline: Order as part no. MX019P 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies Quad Digital Control Amplifier 12 MX019 Package Tolerances A DIM. E1 B E T PIN 1 K K1 H L J J1 C P F A B C E E1 F H J J1 K K1 L P T MIN. TYP. 0.753 (19.13) 0.285 (7.24) 0.165 (4.19) 0.370 (9.40) MAX. 0.767 (19.48) 0.291 (7.39) 0.230 (5.84) 0.415 (10.53) 0.300 (7.61) 0.317 (8.04) 0.70 (17.78) 0.020 (0.51) 0.018 (0.46) 0.055 (1.39) 0.053 (1.33) 0.080 (2.03) 0.075 (1.91) 0.080 (2.03) 0.115 (2.92) 0.200 (5.08) 0.100 (2.54) 0.0098 (0.249) 0.0102 (0.259) NOTE : All dimensions in inches (mm.) Angles are in degrees Figure 8: 16-pin CDIP Mechanical Outline: Order as part no. MX019J 1998 MX-COM, INC. www.mxcom.com Tel: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA Doc. # 20480077.006 All trademarks and service marks are held by their respective companies CML Microcircuits COMMUNICATION SEMICONDUCTORS CML Product Data In the process of creating a more global image, the three standard product semiconductor companies of CML Microsystems Plc (Consumer Microcircuits Limited (UK), MX-COM, Inc (USA) and CML Microcircuits (Singapore) Pte Ltd) have undergone name changes and, whilst maintaining their separate new names (CML Microcircuits (UK) Ltd, CML Microcircuits (USA) Inc and CML Microcircuits (Singapore) Pte Ltd), now operate under the single title CML Microcircuits. These companies are all 100% owned operating companies of the CML Microsystems Plc Group and these changes are purely changes of name and do not change any underlying legal entities and hence will have no effect on any agreements or contacts currently in force. CML Microcircuits Product Prefix Codes Until the latter part of 1996, the differentiator between products manufactured and sold from MXCOM, Inc. and Consumer Microcircuits Limited were denoted by the prefixes MX and FX respectively. These products use the same silicon etc. and today still carry the same prefixes. In the latter part of 1996, both companies adopted the common prefix: CMX. This notification is relevant product information to which it is attached. CML Microcircuits (USA) [formerly MX-COM, Inc.] Product Textual Marking On CML Microcircuits (USA) products, the ‘MX-COM’ textual logo is being replaced by a ‘CML’ textual logo. Company contact information is as below: CML Microcircuits (UK)Ltd CML Microcircuits (USA) Inc. CML Microcircuits (Singapore)PteLtd COMMUNICATION SEMICONDUCTORS COMMUNICATION SEMICONDUCTORS COMMUNICATION SEMICONDUCTORS Oval Park, Langford, Maldon, Essex, CM9 6WG, England Tel: +44 (0)1621 875500 Fax: +44 (0)1621 875600 [email protected] www.cmlmicro.com 4800 Bethania Station Road, Winston-Salem, NC 27105, USA Tel: +1 336 744 5050, 0800 638 5577 Fax: +1 336 744 5054 [email protected] www.cmlmicro.com No 2 Kallang Pudding Road, 09-05/ 06 Mactech Industrial Building, Singapore 349307 Tel: +65 7450426 Fax: +65 7452917 [email protected] www.cmlmicro.com D/CML (D)/2 May 2002