DATA BULLETIN MX029 Dual Digitally Controlled Amplifier PRELIMINARY INFORMATION Features Applications 2 Digitally Controlled Amplifiers ±48dB Gain/Attenuation in 2dB Steps + Mute Individual Control with a 14-Bit Serial Word Separate Fixed Gain Buffer Amplifier SERIAL CLOCK DATA INPUT LOAD/LATCH Cellular and LMR Radios PABX’s, Electronic Mail, TAM's Automatic Test Equipment Remote Gain Adjustments Digitally Set Audio Control Levels SERIAL INTERFACE VDD STAGE 1 CONTROL REGISTER VSS BIAS VSS BIAS CH1, INPUT 1 CH1, OUTPUT 1 ∆G CH1, INPUT 2 CH1, INPUT 3 CH1, OUTPUT 2 TO STAGE 1 CONTROL REGISTER VSS BIAS STAGE 1 CONTROL REGISTER VSS BIAS CH2, INPUT 1 ∆G CH2, OUTPUT 1 CH2, INPUT 2 UNIVERSAL AMP OUT UNIVERSAL AMP IN BIAS The MX029 Digitally Controlled Amplifier Array replaces audio level controls in radio and wireline communications applications. It is a single-chip LSI circuit comprised of two discrete, digitally controlled gain sections. Each section has 48 distinct gain steps (+/-48dB of range in 2dB steps) plus MUTE. As shown in Figure 1, both gain stages have switchable inputs. This switching allows for selection of three different input signals on one channel and two on the other channel. One of the channels also has output switching. In addition to two digitally controlled gain stages, there is a general purpose inverting amplifier. The gain of this amplifier is controlled externally via negative feedback. Control of each gain control section is accomplished through the serial interface. All switching is accomplished using controlled rise and fall times, thereby assuring no transients (clicks or pops). The MX029 requires a single 5-volt supply and is available in the following packages: 16-pin SOIC (MX029DW), 16-pin CDIP (MX029J), and 24-pin TSSOP (MX029TN). 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 2 MX029 CONTENTS Section Page 1. Block Diagram ................................................................................................................. 3 2. Signal List ........................................................................................................................ 4 3. External Components ..................................................................................................... 5 4. Application....................................................................................................................... 5 4.1 Recommendations ................................................................................................................. 5 5. Control Data and Timing................................................................................................. 6 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 Serial Interface Timing ......................................................................................................... 10 6.3 Packaging............................................................................................................................. 11 MX-COM, Inc. reserves the right to change specifications at any time and without notice. 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 3 MX029 1. Block Diagram SERIAL CLOCK DATA INPUT LOAD/LATCH SERIAL INTERFACE VDD STAGE 1 CONTROL REGISTER VSS BIAS VSS BIAS CH1, INPUT 1 CH1, OUTPUT 1 ∆G CH1, INPUT 2 CH1, INPUT 3 CH1, OUTPUT 2 TO STAGE 1 CONTROL REGISTER VSS BIAS STAGE 1 CONTROL REGISTER VSS BIAS CH2, INPUT 1 ∆G CH2, OUTPUT 1 CH2, INPUT 2 UNIVERSAL AMP OUT UNIVERSAL AMP IN BIAS Figure 1: Device Block Diagram 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 4 MX029 2. Signal List Pin No. Type Description J, DW TN 1 1 Serial Clock This external clock input is used to “clock in” the Control Data. See Figure 4 for timing information. This input has an internal 1M pullup resistor. 2 4 Control (Data) Input: Operation of the two amplifier channels (Ch1 - Ch2) is controlled by the data entered serially at this pin. The data is entered (bit 13 to bit 0) on the rising edge of the external Serial Clock. The data format is described in Tables 1-5 and Figure 3. This input has an internal 1M pullup resistor. 3 5 Load/ Latch This function governs the loading and execution of the 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 14 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. 4 6 Ch 1 Input 1 Analog Input. 5 7 Ch 1 Input 2 Analog Input. 6 8 Ch 2 Input 1 Analog Input. 7 9 Ch 2 Input 2 Analog Input. 8 12 VSS 9 13 VBIAS 10 16 Ch 1 Input 3 Analog Input. Normally used for FSK data. 11 17 Ch 2 Output Analog Output. 12 18 Ch 1 Output Analog Output. 13 20 Ch 1 Output Analog Output. 14 21 Universal Amp Out Output from general purpose amplifier. 15 23 Universal Amp In Inverting input to general purpose amplifier. 16 24 VDD Positive supply rail. A single +5-volt power supply is required. 2, 3, 10, 11,14, 15, 19, 22 N/C No internal connection 1998 MX-COM, INC. Negative supply (GND). The output of the on-chip bias circuitry, held at VDD/2. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 5 MX029 3. External Components VDD Serial Clock Input Serial Control Data Input Load/Latch Ch 1 Input 1 Ch 1 Input 2 Ch 2 Input 1 Ch 2 Input 2 C1 C2 1 16 2 15 3 14 4 13 5 C3 C4 VSS MX029 12 6 11 7 10 8 9 C1 to C5 Note 1 C6 VDD Universal Amp In Universal Amp Out Ch 1 Output 1 Ch 1 Output 2 C6 Ch 2 Output Ch 1 Input 3 C5 VBIAS 0.1µF ±20% 1.0µF ±20% Notes: 1. Analog input capacitors C1 to C5 are only required for a.c. input signals; d.c. input signals do not require these components. Figure 2: Recommended External Components 4. Application 4.1 Recommendations To avoid noise and instability the following practices are recommended: 1. Use a clean, well-regulated power supply. 2. Keep leads short. 3. Inputs and outputs should be shielded wherever possible. 4. Analog tracks should not run parallel to digital tracks. 5. A “Ground Plane” connected to Vss will assist in eliminating external pick-up on the channel input and output pins. 6. Avoid running High Level Outputs adjacent to Low Level Inputs. 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 6 MX029 5. Control Data and Timing The gain and I/O signal path for each section (Channels 1 and 2) is set individually by a 14-bit data word (D0 to D13). Data is loaded on the rising edge of the Serial Clock. Loaded data is executed on the rising edge of the Load/Latch pulse. The 14-bit word consists of 1 channel address bit (D7) for selection of the channel to be programmed, 6 bits for setting the gain/attenuation level (D8-D13), 3 bits for input selection (D4 and D6), and 4 bits for output settings (D0-D3). This format is illustrated in Figure 3. D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 G SET G SET G SET G SET G SET G SET CHAN ADDR IN SEL IN SEL IN SEL OUT SET OUT SET OUT SET OUT SET GAIN/ATTN LEVEL CHANNEL ADDRESS INPUT SELECT OUTPUT SETTINGS Figure 3: Data Word Format Tables 1-5 show how the data word is used to control channel selection, gain/attenuation, input selection and output settings, respectively. To calculate the data word used to control channel gain/attenuation use the following formula: gain dB 25 + = The decimal equivalent of binary Data Word 2 For example: using a gain of +34dB, D13 - D8 +34dB 25 + = 42 = $2A = 2 101010 D13 D12 D11 D10 D9 D8 GAIN SET (dB) 0 0 0 0 0 0 MUTE 0 0 0 0 0 1 -48 0 0 0 0 1 0 -46 0 0 0 0 1 1 -44 0 1 1 0 0 1 0 1 0 1 1 1 0 +42 1 0 1 1 1 1 +44 1 1 0 0 0 0 +46 1 1 0 0 0 1 +48 1 1 0 0 1 0 +48 1 1 0 0 1 1 +48 Table 1: Gain/Attenuation Level 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 7 MX029 D7 Channel Selected 0 1 1 2 Table 2: Channel Selection D6 D5 D4 INPUTS SELECTED 0 0 0 NONE 0 0 1 1 0 1 0 2 0 1 1 1&2 1 0 0 3 1 0 1 1&3 1 1 0 2&3 1 1 1 1, 2, & 3 Table 3: Input Select D3 D2 OUTPUT 2 SETTINGS 0 0 high impedance 0 1 amplifier output 1 0 VSS 1 1 VBIAS Table 4: Settings for Output 2 (Ch 1 only) D1 D0 OUTPUT 1 SETTINGS 0 0 high impedance 0 1 amplifier output 1 0 VSS 1 1 VBIAS Table 5: Settings for Output 1 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 8 MX029 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 (VDD-VSS) -0.3 7.0 V Voltage on any pin to VSS -0.3 (VDD + 0.3) V Current VDD -30 30 mA VSS -30 30 Any other pin -20 20 mA 800 mW Max. 10 mW/°C above TAMB 25°C Total Allowable Power Dissipation at TAMB 25°C Derating above TAMB 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. VDD 4.5 5.0 5.5 V Operating temperature -40 85 °C 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Units Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 9 MX029 6.1.3 Operating Characteristics For the following conditions unless otherwise specified: VDD = 5.0V, TAMB = 25°C Audio level 0dB ref. = 775mVRMS Notes Min. Typ. Max Units Current: All Stages Operating 3.0 mA Digital Inputs Input Logic “1” 3.5 V Input Logic “0” 1.5 Digital Input Impedance 0.5 1.0 V M Gain Control Amplifier Stages Bandwidth (-3dB) 1 3.3 Output Impedance Total Harmonic Distortion 2, 4 Interstage Isolation kHz 1.0 2.0 k 0.35 0.5 % 60.0 Gain/Attenuation 46 Gain/Attenuation Steps (48 total) dB 48 dB 2.0 dB Step Error 0.4 Input Impedance 50.0 Input Referred Offset Voltage (VIOS) dB k 10 mV Universal Amplifier Bandwidth (-3dB) 3 10 Output Impedance Total Harmonic Distortion 3 Open Loop DC Gain kHz 1.0 2.0 k 0.35 0.5 % 60 dB Notes: 1. Gain set to maximum (+48 dB) 2. Gain Set 0dB. Input Level 1kHz -3.0dB (549mVrms) 3. Gain externally set to 10 dB. 4. With a 100k load on the output. 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 10 MX029 6.2 Serial Interface Timing Parameter Min. tPWH Serial Clock “High” Pulse Width 250 Typ. Max. Units ns tPWL Serial Clock “Low” Pulse Width 250 ns tDS Data Set-up Time 150 ns 50 tDH Data Hold Time tLLO Load/Latch Over Time ns tLLD Load/Latch Delay 200 ns tLLW Load/Latch Pulse Width 150 ns 0 Serial Data Clock Frequency Serial Clock 2.0 ns MHz t PWH t PWL 14TH CLOCK PULSE 1ST CLOCK PULSE t DS t DH Serial Data D13 D12 D1 D0 t LLD Load/Latch t LLO t LLW Figure 4: Serial Timing Diagram 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 11 MX029 6.3 Packaging Package Tolerances A DIM. B ALTERNATIVE PIN LOCATION MARKING A B C E H J L P T Y E L T PIN 1 Y C H 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) 0.030 (0.75) 0.020 (0.50) 0.0256 (0.65) 0.003 (0.08) 0.008 (0.20) 0° 8° NOTE : All dimensions in inches (mm.) Angles are in degrees P J MIN. Figure 5: 24-pin TSSOP Mechanical Outline: Order as part no. MX029TN Package Tolerances A Z ALTERNATIVE PIN LOCATION MARKING B E W L T PIN 1 X Y C H J 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) 0.016 (0.41) 0.050 (1.27) 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. MX029DW 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 12 MX029 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 7: 16-pin CDIP Mechanical Outline: Order as part no. MX029J 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. Doc. # 20480096.008 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