Dual Single-Supply Audio Operational Amplifier

a FEATURES Excellent Sonic Characteristics High Output Drive Capability 5.2 nV/√Hz Equivalent Input Noise @ 1 kHz 0.001% THD+N (VO = 2.5 V p-p @ 1 kHz) 3.5 MHz Gain Bandwidth Unity-Gain Stable Low Cost APPLICATIONS Multimedia Audio Systems Microphone Preamplifier Headphone Driver Differential Line Receiver Balanced Line Driver Audio ADC Input Buffer Audio DAC l-V Converter and Filter Pseudo-Ground Generator Dual Single-Supply Audio Operational Amplifier SSM2135 PIN CONNECTIONS 8-Lead Narrow-Body SOIC (S Suffix) OUT A –IN A +IN A V–/GND 8-Lead Epoxy DIP (P-Suffix) 1 2 3 4 8 7 6 5 V+ OUT B –IN B +IN B OUT A –IN A +IN A V–/GND V+ SSM2135 OUT B –IN B +IN B SSM2135 under moderate load conditions. Under severe loading, the SSM2135 still maintains a wide output swing with ultralow distortion. Particularly well suited for computer audio systems and portable digital audio units, the SSM2135 can perform preamplification, headphone and speaker driving, and balanced line driving and receiving. Additionally, the device is ideal for input signal conditioning in single-supply sigma-delta analogto-digital converter subsystems such as the AD1878/AD1879. The SSM2135 is available in 8-lead plastic DIP and SOIC packages, and is guaranteed for operation over the extended industrial temperature range of –40°C to +85°C. *Protected by U. S. Patent No. 5,146,181. GENERAL DESCRIPTION The SSM2135 Dual Audio Operational Amplifier permits excellent performance in portable or low power audio systems, with an operating supply range of +4 V to +36 V or ± 2 V to ± 18 V. The unity gain stable device has very low voltage noise of 4.7 nV/√Hz, and total harmonic distortion plus noise below 0.01% over normal signal levels and loads. Such characteristics are enhanced by wide output swing and load drive capability. A unique output stage* permits output swing approaching the rail FUNCTIONAL BLOCK DIAGRAM V+ +IN 9V 9V –IN OUT V–/GND 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 SSM2135–SPECIFICATIONS Parameter AUDIO PERFORMANCE Voltage Noise Density Current Noise Density Signal-To-Noise Ratio Headroom Total Harmonic Distortion Symbol en in SNR HR THD+N (VS = +5 V, –40 C < TA < +85 C unless otherwise noted. Typical specifications apply at TA = +25 C.) Min Typ 5.2 0.5 121 5.3 0.003 0.005 0.6 0.9 3.5 5.8 +4.0 2.0 750 50 Max Units nV/√Hz pA/√Hz dBu dBu % % V/µs MHz µs V mV nA nA MΩ dB V/µV V V mV mV mA V V dB mA mA Conditions f = 1 kHz f = 1 kHz 20 Hz to 20 kHz, 0 dBu = 0.775 V rms Clip Point = 1% THD+N, f = 1 kHz, RL = 10 kΩ AV = +1, VO = 1 V p-p, f = 1 kHz, 80 kHz LPF RL = 10 kΩ RL = 32 Ω RL = 2 kΩ, TA = +25°C to 0.1%, 2 V Step DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Settling Time INPUT CHARACTERISTICS Input Voltage Range Input Offset Voltage Input Bias Current Input Offset Current Differential Input Impedance Common-Mode Rejection Large Signal Voltage Gain SR GBW tS VCM VOS IB IOS ZIN CMR AVO 0 VOUT = 2 V VCM = 0 V, VOUT = 2 V VCM = 0 V, VOUT = 2 V 0 V ≤ VCM ≤ 4 V, f = dc 0.01 V ≤ VOUT ≤ 3.9 V, RL = 600 Ω RL = 100 kΩ RL = 600 Ω RL = 100 kΩ RL = 600 Ω 87 2 4.1 3.9 ± 30 +4 ±2 90 0.2 300 4 112 OUTPUT CHARACTERISTICS Output Voltage Swing High VOH Output Voltage Swing Low Short Circuit Current Limit POWER SUPPLY Supply Voltage Range Power Supply Rejection Ratio Supply Current VOL ISC VS PSRR ISY 3.5 3.0 Single Supply Dual Supply VS = +4 V to +6 V, f = dc VOUT = 2.0 V, No Load VS = +5 V VS = ± 18 V, VOUT = 0 V, No Load +36 ± 18 120 2.8 3.7 6.0 7.6 ABSOLUTE MAXIMUM RATINGS THERMAL CHARACTERISTICS Supply Voltage Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +36 V Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± VS Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . 10 V Output Short Circuit Duration . . . . . . . . . . . . . . . . Indefinite Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C Operating Temperature Range . . . . . . . . . . . –40°C to +85°C Junction Temperature Range (TJ) . . . . . . . . –65°C to +150°C Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . . +300°C ESD RATINGS Thermal Resistance1 8-Lead Plastic DIP 8-Lead SOIC 1 θJA θJC θJA θJC 103°C/W 43°C/W 158°C/W 43°C/W θJA is specified for worst case conditions, i.e., θJA is specified for device in socket for P-DIP and device soldered in circuit board for SOIC package. ORDERING GUIDE 883 (Human Body) Model . . . . . . . . . . . . . . . . . . . . . . . 1 kV EIAJ Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 V Model SSM2135P SSM2135S Temperature Range –40°C to +85°C –40°C to +85°C Package Description Package Option 8-Lead Plastic DIP N-8 8-Lead SOIC SO-8 –2– REV. D SSM2135 +5V 500µF + 10 VS = +5V AV = +1, ƒ = 1kHz VIN = 1Vp-p RL = 10kΩ WITH 80kHz FILTER 1 RL THD – % +2.5Vdc 0.1 Figure 1. Test Circuit for Figures 2–4 0.01 0.001 10 100 1k LOAD RESISTANCE – Ω 10k Figure 4. THD+N vs. Load (See Test Circuit) 1 VS = +5V RL = 100kΩ VOUT = 2.5Vp-p ƒ = 1kHz WITH 80kHz FILTER NONINVERTING 0.1 THD+N – % INVERTING Figure 2. THD+N vs. Amplitude (See Test Circuit; AV = +1, VS = +5 V, f = 1 kHz, with 80 kHz Low-Pass Filter) 0.01 0.001 0 10 20 30 GAIN – dB 40 50 60 Figure 5. THD+N vs. Gain 1 VS = +5V AV = +1, ƒ = 1kHz VIN = 1Vp-p RL = 10kΩ 0.1 WITH 80kHz FILTER THD+N – % Figure 3. THD+N vs. Frequency (See Test Circuit; AV = +1, VIN = 1 V p-p, with 80 kHz Low-Pass Filter) 0.01 0.001 5 10 15 20 25 30 SUPPLY VOLTAGE – V Figure 6. THD+N vs. Supply Voltage REV. D –3– SSM2135 5 VS = +5V TA = +25°C 4 in – pA/ √Hz 3 2 1 0 1 10 100 FREQUENCY – Hz 1k Figure 7. SMPTE Intermodulation Distortion (AV = +1, VS = +5 V, f = 1 kHz, RL = 10 kΩ) Figure 10. Current Noise Density vs. Frequency 1s 100 90 10 0% Figure 8. Input Voltage Noise (20 nV/div) Figure 11. Frequency Response (AV = +1, VS = +5 V, VIN = 1 V p-p, RL = 10 kΩ) 30 VS = +5V TA = +25°C 100 90 25 20 en – nV/ √Hz 15 10 10 0% 5 500m V 1µS 0 1 10 100 FREQUENCY – Hz 1k Figure 9. Voltage Noise Density vs. Frequency Figure 12. Square Wave Response (VS = +5 V, AV = +1, RL = ∞) –4– REV. D SSM2135 60 40 CHANNEL SEPARATION – dB 50 VS = +5V TA = +25°C CLOSED-LOOP GAIN – dB VS = +5V 40 AV = +100 30 TA = +25 °C 20 0 –20 –40 –60 –80 –100 –120 105 20 AV = +10 10 0 AV = +1 –10 –20 10 100 1k 10k 100k FREQUENCY – Hz 1M 10M 1k 10k 100k FREQUENCY – Hz 1M 10M Figure 13. Crosstalk vs. Frequency (RL = 10 kΩ) Figure 16. Closed-Loop Gain vs. Frequency 140 VS = +5V COMMON-MODE REJECTION – dB 120 100 TA = +25° C 100 VS = +5V 80 OPEN-LOOP GAIN – dB TA = +25 °C 0 GAIN 80 40 PHASE 20 θm = 57° 90 60 40 135 20 0 100 0 180 –20 1k 10k FREQUENCY – Hz 100k 1M 1k 10k 100k FREQUENCY – Hz 1M 225 10M Figure 14. Common-Mode Rejection vs. Frequency 140 120 100 PSRR – dB Figure 17. Open-Loop Gain and Phase vs. Frequency 50 VS = +5V AV = +1 TA = +25°C OVERSHOOT – % 45 40 35 30 25 20 15 VS = +5V RL = 2kΩ VIN = 100mVp–p TA = +25 °C AV = +1 80 60 40 20 –PSRR +PSRR NEGATIVE EDGE POSITIVE EDGE 10 0 –20 10 100 1k 10k FREQUENCY – Hz 100k 1M 5 0 0 100 200 300 400 500 LOAD CAPACITANCE – pF Figure 15. Power Supply Rejection vs. Frequency Figure 18. Small Signal Overshoot vs. Load Capacitance REV. D –5– PHASE – Degrees 60 45 SSM2135 50 45 40 OUTPUT VOLTAGE – Volts 30 25 20 15 10 5 40 VS = +5V TA = +25°C 35 35 IMPEDANCE – Ω 30 25 20 15 10 5 AVCL = +100 VS = +5V AV = +1 RL = 10k ƒ = 1kHz THD+N = 1% TA = +25°C AVCL = +10 AVCL = +1 0 10 100 1k 10k FREQUENCY – Hz 100k 1M 0 0 5 10 15 20 25 30 SUPPLY VOLTAGE – Volts 35 40 Figure 19. Output Impedance vs. Frequency Figure 22. Output Swing vs. Supply Voltage 5 VS = +5V TA = +25°C AV = +1 ƒ = 1kHz THD+N = 1% 5.0 VS = +5.0V 2.0 4 MAXIMUM OUTPUT – Volts 4.5 +SWING RL = 2kΩ 4.0 1.5 3 2 +SWING RL = 600Ω –SWING RL = 2kΩ 1.0 3.5 –SWING RL = 600Ω 3.0 0.5 1 0 1 10 100 1k LOAD RESISTANCE – Ω 10k 100k –75 –50 –25 0 25 50 75 100 0 125 TEMPERATURE – °C Figure 20. Maximum Output Voltage vs. Load Resistance Figure 23. Output Swing vs. Temperature and Load 6 VS = +5V MAXIMUM OUTPUT SWING – Volts 5 RL = 2kΩ TA = +25 °C AV = +1 SLEW RATE – V/µs 2.0 VS = +5V +0.5V ≤ V OUT ≤ +4.0V 1.5 +SLEW RATE 4 3 1.0 –SLEW RATE 2 0.5 1 0 1k 10k 100k FREQUENCY – Hz 1M 10M 0 –75 –50 –25 0 25 50 75 100 125 TEMPERATURE – °C Figure 21. Maximum Output Swing vs. Frequency Figure 24. Slew Rate vs. Temperature –6– REV. D NEGATIVE OUTPUT SWING – Volts POSITIVE OUTPUT SWING – Volts SSM2135 20 18 16 VS = +5.0V VO = 3.9V 5 4 RL = 2kΩ OPEN-LOOP GAIN – V/µV SUPPLY CURRENT – mA 14 12 10 8 6 4 2 0 –75 –50 –25 VS = ±18V 3 VS = ±15V VS = +5.0V RL = 600Ω 2 1 0 0 25 50 75 100 125 –75 –50 –25 0 25 50 75 100 125 TEMPERATURE – °C TEMPERATURE – °C Figure 25. Open-Loop Gain vs. Temperature Figure 27. Supply Current vs. Temperature 70 VS = +5V 5 500 GAIN-BANDWIDTH PRODUCT – MHz 65 GBW 60 θm 4 INPUT BIAS CURRENT – nA 400 VS = +5.0V 300 VS = ±15V 200 PHASE MARGIN – Degrees 3 55 2 100 50 –75 –50 –25 0 25 50 75 100 TEMPERATUR