5 MHz Single-Supply Operational Amplifier OP183 Single supply: 3 V to 36 V Wide bandwidth: 5 MHz Low offset voltage: 1 mV High slew rate: 10 V/μs Low noise: 10 nV/√Hz Unity gain stable Input and output range includes GND No phase reversal PIN CONNECTION NULL 1 –IN 2 +IN 3 OP183 8 NC 7 V+ 6 OUT TOP VIEW V– 4 (Not to Scale) 5 NULL 00292-001 FEATURES Figure 1. 8-Lead Narrow Body SOIC (S Suffix) APPLICATIONS Multimedia Telecom ADC buffers Wide band filters Microphone preamplifiers GENERAL DESCRIPTION The OP183 is a single-supply, 5 MHz bandwidth amplifier with slew rates of 10 V/μs. It can operate from voltages as low as 3 V and up to 36 V. This combination of slew rate and bandwidth yields excellent single-supply ac performance, making this amplifier ideally suited for telecom and multimedia audio applications. The OP183 also provides good dc performance with guaranteed 1 mV offset. Noise is a respectable 10 nV/√Hz. Supply current is only 1.2 mA per amplifier. This amplifier is well suited for single-supply applications that require moderate bandwidth even when used in high gain configurations. This makes it useful in filters and instrumentation. The output drive capability and very wide full-power bandwidth of the OP183 make it a good choice for multimedia headphone drivers or microphone input amplifiers. The OP183 is available in a SO-8 surface-mount package. It is specified over the extended industrial (−40°C to +85°C) temperature range. Rev. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2005 Analog Devices, Inc. All rights reserved. OP183 TABLE OF CONTENTS Specifications..................................................................................... 3 Direct Access Arrangement ...................................................... 13 Electrical Characteristics @ VS = 5 V......................................... 3 5 V Only Stereo DAC for Multimedia ..................................... 13 Electrical Characteristics @ VS = 3 V......................................... 4 Low Voltage Headphone Amplifiers........................................ 14 Electrical Characteristics @ VS = ±15 V.................................... 5 Low Noise Microphone Amplifier for Multimedia ............... 14 Absolute Maximum Ratings............................................................ 6 3 V 50 Hz/60 Hz Active Notch Filter with False Ground ..... 14 ESD Caution.................................................................................. 6 Low Voltage Frequency Synthesizer for Wireless Transceiver .................................................................................. 15 Typical Performance Characteristics ............................................. 7 Applications..................................................................................... 13 Offset Adjust ............................................................................... 13 Outline Dimensions ....................................................................... 16 Ordering Guide .......................................................................... 16 Phase Reversal............................................................................. 13 REVISION HISTORY 5/05—Rev. C to Rev. D Updated Format.................................................................. Universal Removed OP283 ................................................................. Universal Updated Outline Dimensions ........................................................16 Changes to Ordering Guide ...........................................................16 Revision 0: Initial Version 2/02—Rev. B to Rev. C Edits to FEATURES...........................................................................1 Edits to GENERAL DESCRIPTION...............................................1 Edits to SPECIFICATIONS......................................................... 2–3 Edits to Package Type........................................................................4 Edits to ORDERING GUIDE...........................................................4 Edits to ABSOLUTE MAXIMUM RATINGS ...............................4 Edits to OUTLINE DIMENSIONS ...............................................12 Rev. D | Page 2 of 16 OP183 SPECIFICATIONS ELECTRICAL CHARACTERISTICS @ VS = 5 V TA = 25°C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions VOS VCM = 2.5 V, VOUT = 2.5 V, −40°C ≤ TA ≤ +85°C VCM = 2.5 V, VOUT = 2.5 V, −40°C ≤ TA ≤ +85°C VCM = 2.5 V, VOUT = 2.5 V, −40°C ≤ TA ≤ +85°C Input Bias Current IB Input Offset Current IOS Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift Bias Current Drift OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Limit Min Typ Max Unit 0.025 1.0 1.25 600 750 mV mV nA nA nA nA V 350 430 11 0 CMRR AVO ΔVOS/ΔT ΔIB/ΔT VOH VOL ISC VCM = 0 to 3.5 V −40°C ≤ TA ≤ +85°C RL = 2 kΩ, 0.2 ≤ VO ≤ 3.8 V 70 100 ±50 3.5 104 dB V/mV μV/°C nA/°C 4 −1.6 RL = 2 kΩ to GND RL = 2 kΩ to GND Source Sink 4.0 4.22 50 25 30 75 V mV mA mA POWER SUPPLY Power Supply Rejection Ratio PSRR VS = 4 V to 6 V, −40°C ≤ TA ≤ +85°C Supply Current/Amplifier ISY 70 dB VO = 2.5 V, −40°C ≤ TA ≤ +85°C Supply Voltage Range 104 VS 1.2 3 1.5 mA ±18 V DYNAMIC PERFORMANCE Slew Rate Full Power Bandwidth SR BWp RL = 2 kΩ 1% Distortion Settling Time tS To 0.01% Gain Bandwidth Product GBP Phase Margin фm 5 10 >50 V/μs kHz 1.5 μs 5 MHz 46 Degrees NOISE PERFORMANCE Voltage Noise en p-p 0.1 Hz to 10 Hz 2 μV p-p Voltage Noise Density en f = 1 kHz, VCM = 2.5 V 10 nV/√Hz Current Noise Density in 0.4 pA/√Hz Rev. D | Page 3 of 16 OP183 ELECTRICAL CHARACTERISTICS @ VS = 3 V TA = 25°C, unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions VOS VCM = 1.5 V, VOUT = 1.5 V, −40°C ≤ TA ≤ +85°C VCM = 1.5 V, VOUT = 1.5 V, −40°C ≤ TA ≤ +85°C VCM = 1.5 V, VOUT = 1.5 V, −40°C ≤ TA ≤ +85°C Input Bias Current IB Input Offset Current IOS Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain OUTPUT CHARACTERISTICS Min Typ Max Unit 0.3 1.0 1.25 600 750 mV mV nA nA nA nA V 350 11 0 CMRR AVO VCM = 0 V to 1.5 V, −40°C ≤ TA ≤ +85°C RL = 2 kΩ, 0.2 ≤ VO ≤ 1.8 V 70 100 2.0 ±50 1.5 103 260 dB V/mV Output Voltage High VOH RL = 2 kΩ to GND Output Voltage Low VOL RL = 2 kΩ to GND 90 2.25 V Short-Circuit Limit ISC Source 25 mA Sink 30 mA 113 dB 125 mV POWER SUPPLY Power Supply Rejection Ratio PSRR VS = 2.5 V to 3.5 V, −40°C ≤ TA ≤ +85°C Supply Current/Amplifier ISY −40°C ≤ TA ≤ +85°C, VO = 1.5 V 60 1.2 1.5 mA DYNAMIC PERFORMANCE Gain Bandwidth Product GBP 5 MHz 10 nV/√Hz NOISE PERFORMANCE Voltage Noise Density en f = 1 kHz, VCM = 1.5 V Rev. D | Page 4 of 16 OP183 ELECTRICAL CHARACTERISTICS @ VS = ±15 V TA = 25°C, unless otherwise noted. Table 3. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions Min VOS Typ Max Unit 0.01 1.0 1.25 600 750 ±50 +13.5 mV mV nA nA nA V 1.5 dB V/mV μV/°C nA/°C mV −40°C ≤ TA ≤ +85°C Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift Bias Current Drift Long-Term Offset Voltage OUTPUT CHARACTERISTICS IB IOS 300 400 11 −40°C ≤ TA ≤ +85°C −40 ≤ TA ≤ +85°C −15 CMRR AVO ΔVOS/ΔT ΔIB/ΔT VOS VCM = −15 V to +13.5 V, –40°C ≤ TA ≤ +85°C RL = 2 kΩ 70 100 86 1000 3 −1.6 Note 1 Output Voltage High VOH RL = 2 kΩ to GND, −40°C ≤ TA ≤ +85°C Output Voltage Low VOL Short-Circuit Limit ISC RL = 2 kΩ to GND, −40°C ≤ TA ≤ +85°C Source 30 mA Sink 50 mA ZOUT f = 1 MHz, AV = +1 15 Ω Power Supply Rejection Ratio PSRR VS = ± 2.5 V to ± 18 V, 112 dB Supply Current/Amplifier ISY VS = ±18 V, VO = 0 V, Supply Voltage Range VS Open-Loop Output Impedance 13.9 14.1 −14.05 V −13.9 V POWER SUPPLY −40°C ≤ TA ≤ +85°C 70 −40°C ≤ TA ≤ +85°C 1.2 3 1.75 mA ±18 V DYNAMIC PERFORMANCE Slew Rate SR RL = 2 kΩ 15 V/μs Full Power Bandwidth BWp 1% Distortion 10 50 kHz Settling Time tS To 0.01% 1.5 μs Gain Bandwidth Product GBP 5 MHz Phase Margin фm 56 Degrees μV p-p NOISE PERFORMANCE 1 Voltage Noise en p-p 0.1 Hz to 10 Hz 2 Voltage Noise Density en f = 1 kHz 10 nV/√Hz Current Noise Density in 0.4 pA/√Hz Long-term offset voltage is guaranteed by a 1,000 hour life test performed on three independent lots at 125°C, with an LTPD of 1.3. Rev. D | Page 5 of 16 OP183 ABSOLUTE MAXIMUM RATINGS Table 4. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameter Supply Voltage Input Voltage Differential Input Voltage 1 Output Short-Circuit Duration to GND Storage Temperature Range Rating ±18 V ±18 V ±7 V Indefinite S Package Operating Temperature Range −65°C to +150°C OP183 Junction Temperature Range −40°C to +85°C Absolute maximum ratings apply to packaged parts, unless otherwise noted. S Package Lead Temperature Range (Soldering 60 sec) −65°C to +150°C 300°C Package Type 8-Lead SOIC (S) 1 Table 5. For supply voltages less than ±7 V, the absolute maximum input voltage is equal to the supply voltage. Maximum input current should not exceed 2 mA. 1 θJA1 158 θJC 43 Units °C/W θJA is specified for worst-case conditions; in other words, θJA is specified for device soldered in circuit board for SOIC packages. ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. D | Page 6 of 16 OP183 TYPICAL PERFORMANCE CHARACTERISTICS 160 80 VS = 5V 300X OP AMPS QUANTITY (Amplifiers) QUANTITY 60 50 40 30 120 100 80 60 40 10 20 00292-002 20 0 –600 –400 –200 0 200 400 –40°C = TA +85°C 300X OP AMPS PLASTIC PACKAGE 140 00292-005 70 0 600 0 2 4 INPUT OFFSET VOLTAGE (μV) 80 10 12 3 60 50 40 30 20 00292-003 10 0 –600 –400 –200 0 200 400 TA = 25°C RL = 2kΩ VS = 3V 2 1 0 600 00292-006 MAXIMUM OUTPUT SWING (V p-p) VS = 5V 300X OP AMPS 70 QUANTITY 8 Figure 5. OP183 Input Offset Voltage Drift (TCVOS) Distribution @ ±15 V Figure 2. OP183 Input Offset Voltage Distribution @ 5 V 1k 10k INPUT OFFSET VOLTAGE (μV) 100k 1M 10M FREQUENCY (Hz) Figure 3. OP183 Input Offset Voltage Distribution @ ±15 V Figure 6. OP183 Maximum Output Swing vs. Frequency @ 3 V 5 140 MAXIMUM OUTPUT SWING (V p-p) –40°C = TA +85°C 300X OP AMPS PLASTIC PACKAGE 120 100 80 60 40 00292-004 20 0 0 2 4 6 TCVOS (μV/°C) 8 10 4 3 2 1 0 12 TA = 25°C RL = 2kΩ VS = 5V 00292-007 160 QUANTITY (Amplifiers) 6 TCVOS (μV/°C) 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 7. OP183 Maximum Output Swing vs. Frequency @ 5 V Figure 4. OP183 Input Offset Voltage Drift (TCVOS) Distribution @ 5 V Rev. D | Page 7 of 16 OP183 500 TA = 25°C RL = 2kΩ VS = 15V INPUT BIAS CURRENT (nA) 25 20 15 10 300 VS = +3V 200 1k 10k 100k 1M 0 –75 10M 00292-011 0 VS = ±15V, VS = +5V 400 100 5 00292-008 MAXIMUM OUTPUT SWING (V p-p) 30 –50 –25 FREQUENCY (Hz) 75 100 125 SOURCE 10m 1μ 10μ 100μ 1m VS = ±18V RL = ∞ 1.25 1.00 VS = +3V RL = ∞ 0.75 0.50 0.25 0 –75 10m –50 –25 LOAD CURRENT (A) 0 25 50 75 100 125 TEMPERATURE (°C) Figure 12. Supply Current per Amplifier vs. Temperature Figure 9. Output Voltage vs. Sink & Source Current 600 1.50 TA = 25°C 400 300 200 00292-010 100 –10 –5 0 5 10 1.25 1.00 0.75 0.50 0.25 0 13.5 COMMON MODE VOLTAGE (V) 00292-013 SUPPLY CURRENT AMPLIFIER (mA) TA = 25°C VS = ±15V 500 0 –15 VS = +5V RL = ∞ 00292-012 SUPPLY CURRENT AMPLIFIER (mA) SINK 100m 00292-009 OUTPUT VOLTAGE Δ TO RAIL (V) 50 1.50 1 INPUT BIAS CURRENT (nA) 25 Figure 11. Input Bias Current vs. Temperature Figure 8. OP183 Maximum Output Swing vs. Frequency @ ±15 V 1m 0 TEMPERATURE (°C) 0 ±2.5 ±5.0 ±7.5 ±10.0 ±12.5 ±15.0 ±17.5 ±20.0 SUPPLY VOLTAGE (V) Figure 10. Input Bias Current vs. Common-Mode Voltage Figure 13. Supply Current per Amplifier vs. Supply Voltage Rev. D | Page 8 of 16 OP183 140 COMMON-MODE REJECTION (dB) 50 40 –1SC 30 +1SC 20 10 100 –50 –25 0 25 50 75 100 +PSRR 80 60 –PSRR 40 20 00292-017 0 –75 TA = 25°C VS = ±15V 120 00292-014 0 100 125 1k 10k Figure 14. Short-Circuit Current vs. Temperature @ 5 V 90 TA = 25°C VS = 3V RL = 10kΩ 80 50 70 GAIN 60 +1SC 30 50 40 195 30 PHASE MARGIN = 43° PHASE 20 20 00292-015 10 0 –75 –50 –25 0 25 50 75 100 10 45 0 0 –10 125 90 1k 10k TEMPERATURE (°C) 100k PHASE (Degrees) GAIN (dB) 40 –45 10M 1M 00292-018 –1SC FREQUENCY (Hz) Figure 15. Short-Circuit Current vs. Temperature @ ±15 V Figure 18. Open-Loop Gain and Phase vs. Frequency @ 3 V 140 90 TA = 25°C VS = ±15V 120 TA = 25°C VS = 5V RL = 10kΩ 80 70 100 GAIN GAIN (dB) 60 80 60 50 40 195 30 PHASE MARGIN = 46° PHASE 20 40 0 100 00292-016 20 1k 10k 100k 45 0 0 –10 1M FREQUENCY (Hz) 90 10 1k 10k 100k 1M –45 10M FREQUENCY (Hz) Figure 16. Common-Mode Rejection vs. Frequency Figure 19. Open-Loop Gain and Phase vs. Frequency @ 5 V Rev. D | Page 9 of 16 PHASE (Degrees) SHORT-CIRCUIT CURRENT (mA) 1M Figure 17. Power Supply Rejection vs. Frequency 60 COMMON-MODE REJECTION (dB) 100k FREQUENCY (Hz) TEMPERATURE (°C) 00292-019 SHORT-CIRCUIT CURRENT (mA) 60 OP183 90 25 TA = 25°C VS = ±15V RL = 10kΩ 80 70 20 VS = ±15V RL = 2kΩ ±SLEW RATE GAIN SLEW RATE (V/μs) 50 40 195 20 90 10 45 0 0 –10 1k 10k 100k –45 10M 1M 15 10 VS = ±15V RL = 2kΩ ±SLEW RATE 5 0 –75 FREQUENCY (Hz) 00292-023 PHASE MARGIN = 56° PHASE PHASE (Degrees) 30 00292-020 –50 –25 0 25 50 75 Figure 20. Open-Loop Gain and Phase vs. Frequency @ ±15 V 30 TA = +25°C VS = ±15V OR VS = +3V, +15V OPEN-LOOP GAIN (V/mV) 800 700 VS = +5V RL = 2kΩ 600 500 400 200 00292-021 VS = ±15V OR VS = +3V RL = 2kΩ 300 100 –50 –25 0 25 50 75 100 25 20 15 10 5 0 125 00292-024 VOLTAGE NOISE DENSITY (nA√Hz) 900 10 TEMPERATURE (°C) 100 1k 10k FREQUENCY (Hz) Figure 21. Open-Loop Gain vs. Temperature Figure 24. Voltage Noise Density vs. Frequency 50 6 40 30 AV = 10 20 10 AV = 1 0 00292-022 –10 –20 1k 10k 100k 1M 5 4 3 2 1 0 10M FREQUENCY (Hz) TA = 25°C VS = ±15V OR VS = +3V, +15V 00292-025 TA = 25°C VS = ±15V AV = 100 CLOSED-LOOP GAIN (dB) 125 Figure 23. Slew Rate vs. Temperature 1000 0 –75 100 TEMPERATURE (°C) CURRENT NOISE DENSITY (pA√Hz) GAIN (dB) 60 10 100 1k FREQUENCY (Hz) Figure 22. Closed-Loop Gain vs. Frequency Figure 25. Current Noise Density vs. Frequency Rev. D | Page 10 of 16 10k OP183 100 TA = 25°C VS = ±15V 90 80 IMPEDANCE (Ω) 70 60 50 40 30 AV = 10 20 00292-026 00292-029 AV = 1 10 0 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 29. Small Signal Performance @ ±15 V Figure 26. Closed-Loop Output Impedance vs. Frequency 80 TA = 25°C VS = 5V RL = 10kΩ 60 50 NEGATIVE EDGE 40 30 20 00292-027 0 100 200 300 CAPACITANCE (pF) Figure 30. 0.1 Hz to 10 Hz Noise @ ±2.5 V Figure 27. Small Signal Overshoot vs. Load Capacitance 00292-031 0 00292-030 POSITIVE EDGE 10 00292-028 SMALL SIGNAL OVERSHOOT (%) 70 Figure 28. Large Signal Performance @ ±15 V Figure 31. 0.1 Hz to 10 Hz Noise @ ±15 V Rev. D | Page 11 of 16 OP183 Preliminary Technical Data DISTORTION (%) 0.1 OP183 VS = ±2.5V AV = +1 RF = 0 VIN = 1VRMS 80kHz LOW-PASS FILTER 600Ω 1kΩ 2kΩ 0.010 5kΩ 10Ω NO LOAD 00292-032 0.001 0.0005 20 100 1k 10k 20k FREQUENCY (Hz) Figure 32. THD + Noise vs. Frequency for Various Loads Rev. D | Page 12 of 16 OP183 APPLICATIONS This arrangement drives the transformer differentially so that the drive to the transformer is effectively doubled over a single amplifier arrangement. This application takes advantage of the ability of the OP183 to drive capacitive loads and to save power in single-supply applications. OFFSET ADJUST Figure 33 shows how the offset voltage of the OP183 can be adjusted by connecting a potentiometer between Pins 1 and 5, and connecting the wiper to VEE. The recommended value for the potentiometer is 10 kΩ. This will give an adjustment range of approximately ±1 mV. If a larger adjustment span is desired, a 50 kΩ potentiometer will yield a range of ±2.5 mV. 300pF 37.4kΩ VCC 20kΩ 0.1μF RxA 7 3 A1 OP183 VOS 6 OP183 0.0047μF 20kΩ 4 2 5 VEE 3.3kΩ 1 00292-033 OP183 A2 475Ω 22.1kΩ 0.1μF TxA Figure 33. OP183 Offset Adjust 20kΩ 0.33μF 750pF 20kΩ PHASE REVERSAL 20kΩ 2.5V 5 V ONLY STEREO DAC FOR MULTIMEDIA The low noise and single-supply capability of the OP183 are ideally suited for stereo DAC audio reproduction or sound synthesis applications, such as multimedia systems. Figure 35 shows an 18-bit stereo DAC output setup that is powered from a single 5 V supply. The low noise preserves the 18-bit dynamic range of the AD1868. The OP183 can be used in a single supply direct access arrangement (DAA) as shown in Figure 34. This figure shows a portion of a typical DAA capable of operating from a single 5 V supply; with minor modifications it should also work on 3 V supplies. Amplifiers A2 and A3 are configured so that the transmit signal TxA is inverted by A2 and not inverted by A3. 2 3 4 5 6 7 8 VBL LL DL CK 16-BIT DAC 18-BIT SERIAL REG. VOL VREF DGND VBR 14 7.68kΩ OP183 9.76kΩ 2 16-BIT DAC 220μF + – LEFT CHANNEL 47kΩ OUTPUT 220μF + – RIGHT CHANNEL 47kΩ OUTPUT 4 100pF 7.68kΩ VREF 11 VOR 1 330pF 13 AGND 12 18-BIT SERIAL REG. 8 3 15 DR LR 16 7.68kΩ 10 100pF VS 9 7.68kΩ 9.76kΩ 6 330pF OP183 5 Figure 35. 5 V Only 18-Bit Stereo DAC Rev. D | Page 13 of 16 7 00292-035 AD1868 VL A3 Figure 34. Direct Access Arrangement DIRECT ACCESS ARRANGEMENT 1 OP183 REF 00292-034 The OP183 is protected against phase reversal as long as both of the inputs are within the range of the positive supply and the negative supply −0.6 V. If there is a possibility of either input going beyond these limits, however, the inputs should be protected with a series resistor to limit input current to 2 mA. OP183 3 V 50 HZ/60 HZ ACTIVE NOTCH FILTER WITH FALSE GROUND LOW VOLTAGE HEADPHONE AMPLIFIERS Figure 36 shows a stereo headphone output amplifier for the AD1849 16-bit SoundPort® Stereo Codec device. The pseudoreference voltage is derived from the common-mode voltage generated internally by the AD1849, thus providing a convenient bias for the headphone output amplifiers. 5kΩ VREF 5V 10μF LOUT1L 21 10kΩ 16Ω 220μF OP183 L VOLUME CONTROL 47kΩ HEADPHONE LEFT AD1849 Figure 38 shows a 50 Hz/60 Hz active notch filter for eliminating line noise in patient monitoring equipment. It has several kilohertz bandwidth and is not sensitive to false-ground perturbations. The simple false-ground circuit shown achieves good rejection of low frequency interference using standard offthe-shelf components. 5V R2 2.67kΩ OP183 VREF 3V R1 2.67kΩ 2 CMOUT 19 4 A1 10kΩ LOUT1R 20 10μF 16Ω 220μF OP183 R VOLUME CONTROL 47kΩ HEADPHONE RIGHT VIN VREF 3 5V OP183 A3 17 MINL 50Ω A2 R5 1.33kΩ (2.67kΩ ÷ 2) C4 1μF R10 25kΩ 1 7 VO R7 1kΩ R8 1kΩ Q = 0.75 R12 70Ω NOTE: FOR 50Hz APPLICATIONS CHANGE R1–R4 TO 3.1Ω AND R5 TO 1.58Ω (3.16Ω ÷ 2). 0.75V C6 1μF 4 10kΩ 10μF C5 0.015μF 3V R9 75kΩ The OP183 is ideally suited as a low noise microphone preamp for low voltage audio applications. Figure 37 shows a gain of 100 stereo preamp for the AD1849 16-bit SoundPort Stereo Codec chip. The common-mode output buffer serves as a phantom power driver for the microphones. R4 2.67kΩ R11 10kΩ LOW NOISE MICROPHONE AMPLIFIER FOR MULTIMEDIA OP183 Figure 38. 3 V Supply 50 Hz/60 Hz Notch Filter with Pseudo Ground Amplifier A3 biases A1 and A2 to the middle of their input common-mode range. When operating on a 3 V supply, the center of the common-mode range of the OP183 is 0.75 V. This notch filter effectively squelches 60 Hz pickup at a filter Q of 0.75. To reject 50 Hz interference, change the resistors in the twin-T section (R1 through R5) from 2.67 kΩ to 3.16 kΩ. 20Ω 10kΩ AD1849 100Ω The filter section uses OP183 op amps in a twin-T configuration whose frequency selectivity is very sensitive to the relative matching of the capacitors and resistors in the twinT section. Mylar is the material of choice for the capacitors, and the relative matching of the capacitors and resistors determines the filter’s pass-band symmetry. Using 1% resistors and 5% capacitors produces satisfactory results. 5V 19 CMOUT 1/2 OP219 100Ω 20Ω 10kΩ 10μF 50Ω OP183 18 MINR 10kΩ 00292-037 RIGHT ELECTRET CONDENSER MIC INPUT C3 1μF (1μF × 2) OP183 Figure 36. Headphone Output Amplifier for Multimedia Sound Codec LEFT ELECTRET CONDENSER MIC INPUT R3 2.67kΩ 00292-036 OPTIONAL GAIN OP183 6 8 R6 10kΩ 5kΩ 1kΩ C2 1μF 1 5 3 C1 1μF 00292-038 OPTIONAL GAIN 1kΩ To process ac signals, it may be easier to use a false-ground bias rather than the negative supply as a reference ground. This would reject the power line frequency interference which can often obscure low frequency physiological signals, such as heart rates, blood pressures, EEGs, and ECGs. Figure 37. Low Noise Stereo Microphone Amplifier for Multimedia Sound Codec Rev. D | Page 14 of 16 OP183 LOW VOLTAGE FREQUENCY SYNTHESIZER FOR WIRELESS TRANSCEIVER 3V CRYSTAL OP183 REFERENCE OSCILLATOR Figure 39 shows a typical application in a radio transceiver. The phase noise performance of the synthesizer depends on low noise contribution from each component in the loop as the noise is amplified by the frequency division factor of the prescaler. PHASE DETECTOR V RF CONTROL OUT VCO ÷ PRESCALER 00292-039 The low noise and low voltage operation capability of the OP183 serves well for the loop filter of a frequency synthesizer. 900MHz Figure 39. Low Voltage Frequency Synthesizer for a Wireless Transceiver The resistors used in the low-pass filter should be of low to moderate values to reduce noise contribution due to the input bias current as well as the resistors themselves. The filter cutoff frequency should be chosen to optimize the loop constant. 7 QB9 RB4 QB10 RB5 RB6 QB11 RB3 Q7 QB6 R1 QB7 Q8 Q6 Q5 JB1 2 Q12 QD2 R2 Q1 R9 QB8 Q2 CC2 3 QD1 CC3 Z1 R8 6 CF1 QB5A Q3 R5 Q4 QD3 CB1 QB3 R7 R10 QB2 RB2 CO 5 1 A R3A R11 QB13 QB1 RB1 R4A R3LT R3AT R3B CC1 R4B R4AT R4LT Q10 Q11 QB14 QB12 4 Figure 40. OP183 Simplified Schematic Rev. D | Page 15 of 16 00292-040 QB4 B OP183 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 8 4.00 (0.1574) 3.80 (0.1497) 1 5 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) 6.20 (0.2440) 4 5.80 (0.2284) 1.75 (0.0688) 1.35 (0.0532) 0.51 (0.0201) COPLANARITY SEATING 0.31 (0.0122) 0.10 PLANE 0.50 (0.0196) × 45° 0.25 (0.0099) 8° 0.25 (0.0098) 0° 1.27 (0.0500) 0.40 (0.0157) 0.17 (0.0067) COMPLIANT TO JEDEC STANDARDS MS-012-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN Figure 41. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) S-Suffix Dimensions shown in millimeters and (inches) ORDERING GUIDE Model OP183GS OP183GS-REEL OP183GS-REEL7 OP183GSZ 1 OP183GSZ-REEL1 OP183GSZ-REEL71 Temperature Range −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C Package Description 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 1 Z = Pb free part. ©2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00292-0-5/05(D) Rev. D | Page 16 of 16 Package Option S-Suffix (R-8) S-Suffix (R-8) S-Suffix (R-8) S-Suffix (R-8) S-Suffix (R-8) S-Suffix (R-8)