ADVANCED LINEAR DEVICES, INC. ALD2702A/ALD2702B ALD2702 DUAL 5V RAIL-TO-RAIL PRECISION OPERATIONAL AMPLIFIER GENERAL DESCRIPTION FEATURES The ALD2702A/ALD2702B/ALD2702 is a dual monolithic operational amplifier intended primarily for a wide range of analog applications in +5V single power supply and ±5V dual power supply systems as well as +4V to +10V battery operated systems. All device characteristics are specified for +5V single supply or ±2.5V dual supply systems. The device has an input stage that operates to +300mV above and -300mV below the supply voltages with no adverse effects and/or phase reversals. It offers popular industry pin configuration. • Rail-to-rail input and output voltage ranges • Symmetrical push-pull class AB output drivers • All parameters specified for +5V single supply or ±2.5V dual supply systems • High load capacitance capability -- drives up to 4000pF typical • No frequency compensation required -unity gain stable • Extremely low input bias currents -<1.0pA typical • Ideal for high source impedance applications • Dual power supply ±2.5V to ±5V operation • Single power supply +5V to +10V operation • High voltage gain -- typically 85V/mV @ ±2.5V and 250V/mV @ ±5.0V • Drive as low as 2KΩ load with 5mA drive current • Output short circuit protected • Unity gain bandwidth of 1.5MHz • Slew rate of 1.9V/µs • Low power dissipation • Suitable for rugged, temperature-extreme environments The ALD2702A/ALD2702B/ALD2702 has been developed specifically with the +5V single supply or ±2.5V dual supply user in mind. Several important characteristics of the device make many applications easy to implement for these supply voltages. First, the operational amplifier can operate with rail to rail input and output voltages. This feature allows numerous analog serial stages to be implemented without losing operating voltage margin. Second, the device was designed to accommodate mixed applications where digital and analog circuits may work off the same 5V power supply. Third, the output stage can drive up to 400pF capacitive and 5KΩ resistive loads in non-inverting unity gain connection and double the capacitance in the inverting unity gain mode. These features, coupled with extremely low input currents, high voltage gain, useful bandwidth of 1.5MHz, a slew rate of 1.9V/µs, low power dissipation, low offset voltage and temperature drift, make the ALD2702A/ ALD2702B/ALD2702 a truly versatile, user friendly, operational amplifier. APPLICATIONS The ALD2702A/ALD2702B/ALD2702 is designed and fabricated with silicon gate CMOS technology, and offers less than 1pA typical input bias current. On-chip offset voltage trimming allows the device to be used without nulling in most applications. The device offers typical offset drift of less than 7µV/°C which eliminates many trim or temperature compensation circuits. For precision applications, the ALD2702A/ ALD2702B/ALD2702 is designed to settle to 0.01% in 8µs. Additionally, robust design and rigorous screening make this device especially suitable for operation in temperature-extreme environments and rugged conditions. ORDERING INFORMATION (“L” suffix denotes lead-free (RoHS)) 0°C to +70°C Operating Temperature Range 0°C to +70°C -55°C to 125°C 8-Pin Small Outline Package (SOIC) 8-Pin Plastic Dip Package 8-Pin CERDIP Package ALD2702ASAL ALD2702BSAL ALD2702SAL ALD2702APAL ALD2702BPAL ALD2702PAL ALD2702ADA ALD2702BDA ALD2702DA * Contact factory for leaded (non-RoHS) or high temperature versions. • • • • • • • • • • • • • Voltage follower/buffer Charge integrator Photodiode amplifier Data acquisition systems High performance portable instruments Signal conditioning circuits Sensor and transducer amplifiers Low leakage amplifiers Active filters Sample/Hold amplifier Picoammeter Current to voltage converter Coaxial cable driver PIN CONFIGURATION OUT A 1 8 V+ -IN A 2 7 OUT B +IN A 3 6 -IN B V- 4 5 +IN B TOP VIEW SAL, PAL, DA PACKAGES Rev 2.0 ©2010 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286 www.aldinc.com ABSOLUTE MAXIMUM RATINGS Supply voltage, V+ referenced to VSupply voltage, VS referenced to VDifferential input voltage range Power dissipation Operating tempurature range SAL, PAL packages DA package Storage tempurature range Lead tempurature, 10 seconds CAUTION: ESD Sensitive Device. Use static control procedures in ESD controlled environment. -0.3V to V++10.6V ±5.3V -0.3V to V+ +0.3V 600 mW 0°C to +70°C -55°C to +125°C -65°C to +150°C +260°C OPERATING ELECTRICAL CHARACTERISTICS TA = 25°C VS = ±2.5V unless otherwise specified Min 2702A Typ Symbol Supply Voltage VS V+ Input Offset Voltage VOS Input Offset Current IOS 1.0 20 240 1.0 20 240 Input Bias Current IB 1.0 20 300 1.0 20 300 Input Voltage Range VIR Input Resistance RIN Input Offset Voltage Drift TCVOS Power Supply Rejection Ratio PSRR 65 65 83 83 65 65 83 83 63 63 Common Mode Rejection Ratio CMRR 65 65 83 83 65 65 83 83 Large Signal Voltage Gain AV 15 28 100 15 28 100 Output Voltage Range VO low VO high 0.002 4.998 0.01 4.99 VO low VO high -2.44 2.44 -2.40 2.40 ±2.0 4.0 Max Min ±5.0 10.0 ±2.0 4.0 2702B Typ Max Parameter 5.3 +2.8 2702 Typ Max Unit Test Conditions ±5.0 10.0 V V Dual Supply Single Supply 5.0 6.0 mV mV RS ≤ 100KΩ 0°C ≤ TA ≤ +70°C 1.0 20 240 pA pA TA = 25°C 0°C ≤ TA ≤ +70°C 1.0 20 300 pA pA TA = 25°C 0°C ≤ TA ≤ +70°C 5.3 +2.8 V V V+ = +5V VS = ±2.5V ±5.0 ±2.0 10.0 4.0 1.0 1.5 -0.3 -2.8 Min 2.0 3.0 -0.3 -2.8 5.3 +2.8 -0.3 -2.8 1012 1012 1012 7 7 7 Ω µV/°C RS ≤ 100KΩ 83 83 dB RS ≤ 100KΩ 0°C ≤ TA ≤ +70°C 63 63 83 83 dB RS ≤ 100KΩ 0°C ≤ TA ≤ +70°C 12 28 100 V/mV V/mV RL = 10KΩ RL ≥ 1MΩ V RL = 1MΩ Single supply 0°C ≤ TA ≤ +70°C V V RL = 10KΩ Dual supply 0°C ≤ TA ≤ +70°C 0.002 0.01 4.998 4.99 0.002 4.998 0.01 4.99 -2.44 -2.40 2.44 2.40 -2.44 2.44 -2.40 2.40 Output Short Circuit Current ISC Supply Current IS 2.0 3.0 2.0 3.0 2.0 3.0 mA VIN = 0V No Load Power Dissipation PD 10 15.0 10 15.0 10 15.0 mW Both amplifiers VS = ±2.5V Input Capacitance CIN 1 Bandwidth BW 0.7 1.5 0.7 1.5 0.7 1.5 MHz Slew Rate SR 1.1 1.9 1.1 1.9 1.1 1.9 V/µs AV = +1 RL = 10KΩ Rise time tr Overshoot Factor ALD2702A/ALD2702B ALD2702 8 8 8 1 1 mA pF 0.2 0.2 0.2 µs RL = 10KΩ 10 10 10 % RL = 10KΩ CL = 100pF Advanced Linear Devices 2 of 9 OPERATING ELECTRICAL CHARACTERISTICS (cont'd) TA = 25°C VS = ±2.5V unless otherwise specified Min 2702A Typ Max Min 2702B Typ Max Min 2702 Typ Parameter Symbol Maximum Load Capacitance CL 400 4000 400 4000 400 4000 Input Noise Voltage en 26 26 Input Current Noise in 0.6 Settling Time ts 8.0 3.0 Max Unit Test Conditions pF pF Gain = 1 Gain = 5 26 nV/√H Z f = 1KHZ 0.6 0.6 fA/√H Z f = 10HZ 8.0 3.0 8.0 3.0 µs µs 0.01% 0.1% AV = -1 RL = 5KΩ CL = 50pF Unit Test Conditions TA = 25°C VS = ±5.0V unless otherwise specified Min 2702A Typ Power Supply Rejection Ratio PSRR 83 83 83 dB RS ≤ 100KΩ Common Mode Rejection Ratio CMRR 83 83 83 dB RS ≤ 100KΩ Large Signal Voltage Gain AV 250 250 250 V/mV RL = 10KΩ Output Voltage Range VO low VO high V RL = 10KΩ Bandwidth BW 1.7 1.7 1.7 MHZ Slew Rate SR 2.8 2.8 2.8 V/µs -4.90 4.93 Min -4.8 4.8 -4.90 4.93 Max Min 2702 Typ Symbol 4.8 Max 2702B Typ Parameter -4.8 4.8 -4.90 4.93 Max -4.8 AV =+1 CL =50pF VS = +5.0V -55°C ≤ TA ≤ +125°C unless otherwise specified 2702DA Typ Max Unit Test Conditions 4.0 7.0 mV RS ≤ 100KΩ 8.0 8.0 8.0 nA 10.0 10.0 10.0 nA Min 2702BDA Typ Max Symbol Input Offset Voltage VOS 2.0 Input Offset Current IOS Input Bias Current IB Power Supply Rejection Ratio PSRR 60 75 60 75 60 75 dB RS ≤ 100KΩ Common Mode Rejection Ratio CMRR 60 83 60 83 60 83 dB RS ≤ 100KΩ Large Signal Voltage Gain AV 10 25 10 25 7 25 V/mV RL ≤ 10KΩ Output Voltage Range VO low VO high 0.1 4.9 4.8 0.1 4.9 RL ≤ 10KΩ 4.8 0.1 4.9 V 4.8 ALD2702A/ALD2702B ALD2702 Min 2702ADA Typ Max Parameter 0.2 Min 0.2 Advanced Linear Devices 0.2 3 of 9 Design & Operating Notes: 1. The ALD2702A/ALD2702B/ALD2702 CMOS operational amplifier uses a 3 gain stage architecture and an improved frequency compensation scheme to achieve large voltage gain, high output driving capability, and better frequency stability. The ALD2702A/ ALD2702B/ALD2702 is internally compensated for unity gain stability using a novel scheme. This design produces a clean single pole roll off in the gain characteristics while providing for more than 70 degrees of phase margin at the unity gain frequency. A unity gain buffer using the ALD2702A/ALD2702B/ALD2702 will typically drive 400pF of external load capacitance without stability problems. In the inverting unity gain configuration, it can drive up to 800pF of load capacitance. Compared to other CMOS operational amplifiers, the ALD2702A/ALD2702B/ALD2702 has shown itself to be more resistant to parasitic oscillations. 2. The ALD2702A/ALD2702B/ALD2702 has complementary p-channel and n-channel input differential stages connected in parallel to accomplish rail-to-rail input common mode voltage range. With the common mode input voltage close to the power supplies, one of the two differential stages is switched off internally. To maintain compatibility with other operational amplifiers, this switching point has been selected to be about 1.5V above the negative supply voltage. As offset voltage trimming on the ALD2702A/ALD2702B/ALD2702 is made when the input voltage is symmetrical to the supply voltages, this internal switching does not affect a large variety of applications such as an inverting amplifier or non-inverting amplifier with a gain greater than 2.5 (5V operation), where the common mode voltage does not make excursions below this switching point. 3. The input bias and offset currents are essentially input protection diode reverse bias leakage currents, and are typically less than 1pA at room temperature. This low input bias current assures that the analog signal from the source will not be distorted by input bias currents. For applications where source impedance is very high, it may be necessary to limit noise and hum pickup through proper shielding. 4. The output stage consists of class AB complementary output drivers, capable of driving a low resistance load. The output voltage swing is limited by the drain to source on-resistance of the output transistors as determined by the bias circuitry, and the value of the load resistor. When connected in the voltage follower configuration, the oscillation resistant feature, combined with the rail to rail input and output feature, makes the ALD2702A/ALD2702B/ALD2702 an effective analog signal buffer for medium to high source impedance sensors, transducers, and other circuit networks. 5. The ALD2702A/ALD2702B/ALD2702 operational amplifier has been designed with static discharge protection. Internally, the design has been carefully implemented to minimize latch up. However, care must be exercised when handling the device to avoid strong static fields. In using the operational amplifier, the user is advised to power up the circuit before, or simultaneously with, any input voltages applied and to limit input voltages to not exceed 0.3V of the power supply voltage levels. Alternatively, a 100KΩ or higher value resistor at the input terminals will limit input currents to acceptable levels while causing very small or negligible accuracy effects. TYPICAL PERFORMANCE CHARACTERISTICS COMMON MODE INPUT VOLTAGE RANGE AS A FUNCTION OF SUPPLY VOLTAGE OPEN LOOP VOLTAGE GAIN AS A FUNCTION OF SUPPLY VOLTAGE AND TEMPERATURE 1000 TA = 25°C OPEN LOOP VOLTAGE GAIN (V/mV) COMMON MODE INPUT VOLTAGE RANGE (V) ±7 ±6 ±5 ±4 ±3 ±2 } -55°C } +25°C 100 } +125°C 10 RL= 10KΩ RL= 5KΩ ±1 0 1 0 ±1 ±2 ±3 ±4 ±5 ±6 ±7 0 ±2 SUPPLY VOLTAGE (V) ±8 6 SUPPLY CURRENT (mA) 10000 INPUT BIAS CURRENT (pA) ±6 SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE INPUT BIAS CURRENT AS A FUNCTION OF AMBIENT TEMPERATURE VS = ± 2.5V 1000 ±4 SUPPLY VOLTAGE (V) 100 10 1.0 INPUTS GROUNDED OUTPUTS UNLOADED 5 4 TA = -55°C 3 -25°C +25°C 2 +80°C +125°C 1 0 0.1 -50 -25 0 25 50 75 100 125 ALD2702A/ALD2702B ALD2702 ±1 ±2 ±3 ±4 ±5 ±6 SUPPLY VOLTAGE (V) AMBIENT TEMPERATURE (°C) Advanced Linear Devices 4 of 9 TYPICAL PERFORMANCE CHARACTERISTICS (cont'd) OPEN LOOP VOLTAGE GAIN AS A FUNCTION OF FREQUENCY OUTPUT VOLTAGE SWING AS A FUNCTION OF SUPPLY VOLTAGE 120 RL = 10KΩ RL = 10KΩ ±5 ±4 RL = 2KΩ ±3 VS = ±2.5V TA = 25°C 100 OPEN LOOP VOLTAGE GAIN (dB) -55°C ≤ TA ≤ 125°C ±6 80 60 0 40 45 20 90 0 135 180 -20 ±2 0 ±1 ±2 ±3 ±4 ±5 ±6 1 ±7 10 100 100K 1M 10M INPUT OFFSET VOLTAGE AS A FUNCTION OF COMMON MODE INPUT VOLTAGE 15 INPUT OFFSET VOLTAGE (mV) INPUT OFFSET VOLTAGE (mV) INPUT OFFSET VOLTAGE AS A FUNCTION OF AMBIENT TEMPERATURE REPRESENTATIVE UNITS VS = ±2.5V +3 +2 +1 0 -1 -2 -3 -4 VS = ±2.5V TA = 25°C 10 5 0 -5 -10 -15 -5 -50 -25 0 +25 +50 +75 -2 +100 +125 -1 0 +1 +2 +3 COMMON MODE INPUT VOLTAGE (V) AMBIENT TEMPERATURE (°C) VOLTAGE NOISE DENSITY AS A FUNCTION OF FREQUENCY OPEN LOOP VOLTAGE GAIN AS A FUNCTION OF LOAD RESISTANCE 150 1000 VOLTAGE NOISE DENSITY (nV/ √ Hz) OPEN LOOP VOLTAGE GAIN (V/mV) 10K FREQUENCY (Hz) SUPPLY VOLTAGE (V) +5 +4 1K PHASE SHIFT IN DEGREES OUTPUT VOLTAGE SWING (V) ±7 VS = ±2.5V TA = 25°C 100 10 125 VS = ±2.5V TA = 25°C 100 75 50 25 0 1 1K 10K 1000K 100K 10 100 LOAD RESISTANCE (Ω) 1V/div ALD2702A/ALD2702B ALD2702 10K 100K 1000K SMALL - SIGNAL TRANSIENT RESPONSE LARGE - SIGNAL TRANSIENT RESPONSE 5V/div 1K FREQUENCY (Hz) VS = ±2.5V TA = 25°C RL = 10KΩ CL = 50pF 100mV/div 20mV/div 2µs/div Advanced Linear Devices VS = ±2.5V TA = 25°C RL = 10KΩ CL = 50pF 2µs/div 5 of 9 TYPICAL APPLICATIONS RAIL-TO-RAIL VOLTAGE FOLLOWER/BUFFER RAIL-TO-RAIL WAVEFORM INPUT 5V ~ 1012Ω ZIN = +5V 0V 0.1µF - VIN CL + +5V OUTPUT 0V OUTPUT RL =10KΩ 400pF Performance waveforms. Upper trace is the output of a Wien Bridge Oscillator. Lower trace is the output of Rail-to-Rail voltage follower. 0 ≤ VIN ≤ 5V * See rail to rail waveform PHOTO DETECTOR CURRENT TO VOLTAGE CONVERTER LOW OFFSET SUMMING AMPLIFIER RF = 5M 50K +2.5V 10K INPUT 1 INPUT 2 I .01µF 10K OUTPUT GAIN = 5 +2.5V - .01µF + + CL = 4000pF * Circuit Drives Large Load Capacitance ≤ 4000pF VOUT = I x RF PHOTODIODE -2.5V RL = 10K - 2.5V RAIL-TO-RAIL VOLTAGE COMPARATOR WIEN BRIDGE OSCILLATOR (RAIL-TO -RAIL) SINE WAVE GENERATOR +5V +2.5V - OUTPUT + .01µF C = .01µF 10K -2.5V 0.1µF - +5V 50K 10K OUTPUT + 10K R = 10K f =~ VIN 1 2πRC 10M ~ 1.6KHz * See rail to rail waveform ALD2702A/ALD2702B ALD2702 Advanced Linear Devices 6 of 9 SOIC-8 PACKAGE DRAWING 8 Pin Plastic SOIC Package E Millimeters Dim S (45°) D A Min 1.35 Max 1.75 Min 0.053 Max 0.069 A1 0.10 0.25 0.004 0.010 b 0.35 0.45 0.014 0.018 C 0.18 0.25 0.007 0.010 D-8 4.69 5.00 0.185 0.196 E 3.50 4.05 0.140 0.160 1.27 BSC e A A1 e Inches 0.050 BSC H 5.70 6.30 0.224 0.248 L 0.60 0.937 0.024 0.037 ø 0° 8° 0° 8° S 0.25 0.50 0.010 0.020 b S (45°) H L ALD2702A/ALD2702B ALD2702 C ø Advanced Linear Devices 7 of 9 PDIP-8 PACKAGE DRAWING 8 Pin Plastic DIP Package Millimeters E E1 D S A2 A1 e b A L Dim Min Max Min Max A 3.81 5.08 0.105 0.200 A1 0.38 1.27 0.015 0.050 A2 1.27 2.03 0.050 0.080 b 0.89 1.65 0.035 0.065 b1 0.38 0.51 0.015 0.020 c 0.20 0.30 0.008 0.012 D-8 9.40 11.68 0.370 0.460 E 5.59 7.11 0.220 0.280 E1 7.62 8.26 0.300 0.325 e 2.29 2.79 0.090 0.110 e1 7.37 7.87 0.290 0.310 L 2.79 3.81 0.110 0.150 S-8 1.02 2.03 0.040 0.080 0° 15° 0° 15° ø b1 Inches c e1 ALD2702A/ALD2702B ALD2702 ø Advanced Linear Devices 8 of 9 CERDIP-8 PACKAGE DRAWING 8 Pin CERDIP Package E E1 Millimeters D A1 s A L L2 b b1 e L1 Inches Dim A Min Max 3.55 5.08 Min 0.140 Max 0.200 A1 1.27 2.16 0.050 0.085 b 0.97 1.65 0.038 0.065 b1 0.36 0.58 0.014 0.023 C 0.20 0.38 0.008 0.015 D-8 -- 10.29 -- 0.405 E 5.59 7.87 0.220 0.310 E1 7.73 8.26 0.290 0.325 e 2.54 BSC 0.100 BSC e1 7.62 BSC 0.300 BSC L 3.81 5.08 0.150 0.200 L1 3.18 -- 0.125 -- L2 0.38 1.78 0.015 0.070 S -- 2.49 -- 0.098 Ø 0° 15° 0° 15° C e1 ALD2702A/ALD2702B ALD2702 ø Advanced Linear Devices 9 of 9