ADVANCED LINEAR DEVICES, INC. ALD4701A/ALD4701B ALD4701 QUAD MICROPOWER RAIL-TO-RAIL CMOS OPERATIONAL AMPLIFIER GENERAL DESCRIPTION FEATURES The ALD4701A/ALD4701B/ALD4701 is a quad monolithic CMOS micropower high slew rate operational amplifier intended for a broad range of analog applications using ±1V to ±5V dual power supply systems, as well as +2V to +10V battery operated systems. All device characteristics are specified for +5V single supply or ±2.5V dual supply systems. Total supply current for all four operational amplifiers is 1mA maximum at 5V supply voltage. It is manufactured with Advanced Linear Devices' enhanced ACMOS silicon gate CMOS process. • All parameters specified for +5V single supply or ±2.5V dual supply systems • Rail-to-rail input and output voltage ranges • Unity gain stable • Extremely low input bias currents -- 1.0pA • High source impedance applications • Dual power supply ±1.0V to ±5.0V • Single power supply +2V to +10V • High voltage gain • Output short circuit protected • Unity gain bandwidth of 0.7MHz • Slew rate of 0.7V/µs • Low power dissipation • Symmetrical output drive • Suitable for rugged, temperature-extreme environments The ALD4701A/ALD4701B/ALD4701 is designed to offer a trade-off of performance parameters providing a wide range of desired specifications. It has been developed specifically for the +5V single supply or ±1V to ±5V dual supply user and offers the popular industry standard pin configuration of LM324 types and ICL7641 types. Several important characteristics of the device make application easier to implement at these voltages. First, each operational amplifier can operate with rail to rail input and output voltages. This means the signal input voltage and output voltage can be equal to or near to the positive and negative supply voltages. This feature allows numerous analog serial stages and flexibility in input signal bias levels. Second, each device was designed to accommodate mixed applications where digital and analog circuits may operate off the same power supply or battery. Third, the output stage can typically drive up to 50pF capacitive and 10KΩ resistive loads. These features, combined with extremely low input currents, high open loop voltage gain of 100V/mV, useful bandwidth of 700KHz, a slew rate of 0.7V/µs, low power dissipation of 5mW, low offset voltage and temperature drift, make the ALD4701A/ALD4701B/ALD4701 a versatile, micropower quad operational amplifier. The ALD4701A/ALD4701B/ALD4701, designed and fabricated with silicon gate CMOS technology, offers 1pA typical input bias current. Due to low voltage and low power operation, reliability and operating characteristics, such as input bias currents and warm up time, are greatly improved. 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 14-Pin Small Outline Package (SOIC) 14-Pin Plastic Dip Package 14-Pin CERDIP Package ALD4701ASBL ALD4701BSBL ALD4701SBL ALD4701APBL ALD4701BPBL ALD4701PBL ALD4701ADB ALD4701BDB ALD4701DB APPLICATIONS • • • • • • • • • • • • Voltage follower/buffer/amplifier 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 PIN CONFIGURATION OUT A 1 14 OUT D -IN A 2 13 -IN D +IN A 3 12 +IN D V+ 4 11 V- +IN B 5 10 +IN C -IN B 6 9 -IN C OUT B 7 8 OUT C TOP VIEW SBL, PBL, DB PACKAGES * Contact factory for leaded (non-RoHS) or high temperature versions. 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+ Differential input voltage range Power dissipation Operating temperature range SBL, PBL packages DB package Storage temperature range Lead temperature, 10 seconds CAUTION: ESD Sensitive Device. Use static control procedures in ESD controlled environment. 10.6V -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 4701A Typ Symbol Supply Voltage VS V+ Input Offset Voltage VOS Input Offset Current IOS 1.0 25 240 1.0 25 240 Input Bias Current IB 1.0 30 300 1.0 30 300 Input Voltage Range VIR Input Resistance RIN Input Offset Voltage Drift TCVOS Power Supply Rejection Ratio PSRR 65 65 80 80 65 65 80 80 60 60 Common Mode Rejection Ratio CMRR 65 65 83 83 65 65 83 83 Large Signal Voltage Gain AV 15 100 300 15 100 300 ±1.0 2.0 Max Min ±5.0 10.0 ±1.0 2.0 4701B Typ Max Parameter 5.3 2.8 ALD4701A/ALD4701B ALD4701 10.0 11.0 mV mV RS ≤ 100KΩ 0°C ≤ TA ≤ +70°C 1.0 25 240 pA pA TA = 25°C 0°C ≤ TA ≤ +70°C 1.0 30 300 pA pA TA = 25°C 0°C ≤ TA ≤ +70°C 5.3 2.8 V V V+ = +5 VS = ±2.5V 5.0 5.8 -0.3 -2.8 5.3 2.8 -0.3 -2.8 -2.48 2.48 -2.40 RS ≤ 100KΩ 80 80 dB dB RS ≤ 100KΩ 0°C ≤ TA ≤ +70°C 60 60 83 83 dB dB RS ≤ 100KΩ 0°C ≤ TA ≤ +70°C 10 80 300 V/mV V/mV V/mV RL = 100KΩ RL ≥ 1MΩ RL = 100KΩ 0°C ≤ TA ≤ +70°C 490 7 0.001 0.01 0.001 4.99 4.999 4.99 4.999 0.01 V V RL= 1MΩ V+ = +5V 0°C ≤ TA ≤ +70°C -2.48 -2.40 2.48 2.40 -2.40 V V RL = 100KΩ 0°C ≤ TA ≤ +70°C 2.40 1 Ω µV/°C 10 2.40 PD Dual Supply Single Supply 7 VO low VO high Power Dissipation V V 5 0.01 IS ±5.0 10.0 5 0.001 4.999 Supply Current Test Conditions 1012 4.99 ISC Unit 1012 VO low VO high Output Short Circuit Current Max 1012 10 Output Voltage Range 4701 Typ ±5.0 ±1.0 10.0 2.0 2.0 2.8 -0.3 -2.8 Min 1 -2.48 2.48 1 1000 490 1000 5.0 5.0 Advanced Linear Devices 490 mA 1000 5.0 µA mW VIN = 0V No Load Both amplifiers VS = ±2.5V 2 of 9 OPERATING ELECTRICAL CHARACTERISTICS (cont'd) TA = 25°C VS = ±2.5V unless otherwise specified Min 4701A Typ Min Max Min 4701 Typ Max Unit Test Conditions Symbol Input Capacitance CIN 1 1 1 Bandwidth BW 700 700 700 KHz Slew Rate SR 0.7 0.7 0.7 V/µs AV = +1 RL = 100KΩ Rise time tr 0.2 0.2 0.2 µs RL = 100KΩ 20 20 20 % RL = 100KΩ CL = 50pF Overshoot Factor Max 4701B Typ Parameter pF Settling Time ts 10.0 10.0 10.0 µs 0.1% AV = -1 CL = 50pF RL = 100KΩ Channel Separation CS 120 120 120 dB AV = 100 TA = 25°C VS = ±5.0V unless otherwise specified Min 4701A Typ 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 = 100KΩ Output Voltage Range VO low VO high V V RL = 100KΩ Bandwidth BW 1.0 1.0 1.0 MHz Slew Rate SR 1.0 1.0 1.0 V/µs -4.90 4.90 -4.98 4.98 Max -4.90 Min -4.98 4.90 4.98 Max -4.90 Unit Test Conditions Power Supply Rejection Ratio -4.98 4.98 Min 4701 Typ Symbol 4.90 Max 4701B Typ Parameter AV = +1 CL = 50pF VS = ± 2.5V -55°C ≤ TA ≤ +125°C unless otherwise specified 4701DA Typ Max Unit 6.0 15.0 mV 8.0 8.0 8.0 nA 10.0 10.0 10.0 nA VOS 3.0 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 50 10 50 7 50 V/mV RL ≤ 100KΩ Output Voltage Range VO low VO high 2.35 -2.47 2.45 2.35 -2.47 2.45 V V RL ≤ 100KΩ -2.47 2.45 -2.40 Min Test Conditions Input Offset Voltage 2.35 Min 4701BDA Typ Max Symbol ALD4701A/ALD4701B ALD4701 Min 4701ADA Typ Max Parameter -2.40 Advanced Linear Devices -2.40 RS ≤ 100KΩ 3 of 9 Design & Operating Notes: 1. The ALD4701A/ALD4701B/ALD4701 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. In a conventional CMOS operational amplifier design, compensation is achieved with a pole splitting capacitor together with a nulling resistor. This method is, however, very bias dependent and thus cannot accommodate the large range of supply voltage operation as is required from a stand alone CMOS operational amplifier. The ALD4701A/ALD4701B/ALD4701 is internally compensated for unity gain stability using a novel scheme that does not use a nulling resistor. This scheme 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. 2. The ALD4701A/ALD4701B/ALD4701 has complementary p-channel and n-channel input differential stages connected in parallel to accomplish rail-to-rail input common mode voltage range. This means that with the ranges of 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 below the positive supply voltage. Since offset voltage trimming on the ALD4701A/ALD4701B/ ALD4701 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 larger than 2.5 (5V operation), where the common mode voltage does not make excursions above this switching point. The user should however, be aware that this switching does take place if the operational amplifier is connected as a unity gain buffer and should make provision in his design to allow for input offset voltage variations. 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. Normally, this extremely high input impedance of greater than 1012Ω would not be a problem as the source impedance would limit the node impedance. However, 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 an effective analog signal buffer for medium to high source impedance sensors, transducers, and other circuit networks. 5. The ALD4701A/ALD4701B/ALD4701 operational amplifier has been designed to provide full 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 that may degrade a diode junction, causing increased input leakage currents. 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 not to exceed 0.3V of the power supply voltage levels. 6. The ALD4701A/ALD4701B/ALD4701, with its micropower operation, offers numerous benefits in reduced power supply requirements, less noise coupling and current spikes, less thermally induced drift, better overall reliability due to lower self heating, and lower input bias current. It requires practically no warm up time as the chip junction heats up to only 0.4°C above ambient temperature under most operating conditions. TYPICAL PERFORMANCE CHARACTERISTICS INPUTS GROUNDED OUTPUT UNLOADED 1600 COMMON MODE INPUT VOLTAGE RANGE AS A FUNCTION OF SUPPLY VOLTAGE ±7 +25°C COMMON MODE INPUT VOLTAGE RANGE (V) SUPPLY CURRENT (µA) SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE -25°C 1200 TA = -55°C 800 +125°C 400 +70°C ±6 ±4 ±3 ±2 ±1 0 0 0 ±1 ±2 ±3 ±4 SUPPLY VOLTAGE (V) ±5 0 ±6 ±3 ±4 ±5 ±6 ±7 10 VS = ±2.5V TA = 25°C INPUT BIAS CURRENT (pA) 10000 100 VS = ±2.5V 1000 100 10 1.0 0.1 100K 1M 10M -50 -25 0 25 50 75 100 125 AMBIENT TEMPERATURE (°C) LOAD RESISTANCE (Ω) ALD4701A/ALD4701B ALD4701 ±2 INPUT BIAS CURRENT AS A FUNCTION OF AMBIENT TEMPERATURE 1000 1 10K ±1 SUPPLY VOLTAGE (V) OPEN LOOP VOLTAGE GAIN AS A FUNCTION OF LOAD RESISTANCE OPEN LOOP VOLTAGE GAIN (V/mV) TA = 25°C ±5 Advanced Linear Devices 4 of 9 TYPICAL PERFORMANCE CHARACTERISTICS (cont'd) OPEN LOOP VOLTAGE GAIN AS A FUNCTION OF SUPPLY VOLTAGE AND TEMPERATURE ±6 OUTPUT VOLTAGE SWING (V) OPEN LOOP VOLTAGE GAIN (V/mV) 1000 OUTPUT VOLTAGE SWING AS A FUNCTION OF SUPPLY VOLTAGE 100 10 -55°C ≤ TA ≤ +125°C RL = 100KΩ ±4 ±3 ±2 ±1 1 0 ±2 ±4 ±6 0 ±8 ±1 ±2 ±3 ±4 ±5 ±6 ±7 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) INPUT OFFSET VOLTAGE AS A FUNCTION OF AMBIENT TEMPERATURE REPRESENTATIVE UNITS OPEN LOOP VOLTAGE GAIN AS A FUNCTION OF FREQUENCY 120 OPEN LOOP VOLTAGE GAIN (dB) +5 +4 VS = ±2.5V +3 +2 +1 0 -1 -2 VS = ±2.5V TA = 25°C 100 -3 -4 80 60 0 40 45 20 90 0 135 180 -20 1 -5 -50 -25 0 +25 +50 +75 10 +100 +125 100 1K 10K 100K FREQUENCY (Hz) 1M PHASE SHIFT IN DEGREES INPUT OFFSET VOLTAGE (mV) -55°C ≤ TA ≤ +125°C RL = 100KΩ ±5 10M AMBIENT TEMPERATURE (°C) INPUT OFFSET VOLTAGE (mV) INPUT OFFSET VOLTAGE AS A FUNCTION OF COMMON MODE INPUT VOLTAGE LARGE - SIGNAL TRANSIENT RESPONSE 15 VS = ±2.5V TA = 25°C 10 2V/div VS = ±1.0V TA = 25°C RL = 100KΩ CL = 50pF 500mV/div 5µs/div 5 0 -5 -10 -15 -2 -1 0 +1 +2 +3 COMMON MODE INPUT VOLTAGE (V) LARGE - SIGNAL TRANSIENT RESPONSE SMALL - SIGNAL TRANSIENT RESPONSE 5V/div VS = ±2.5V TA = 25°C RL = 100KΩ CL = 50pF 100mV/div VS = ±2.5V TA = 25°C RL = 100KΩ CL = 50pF 2V/div 5µs/div 20mV/div 2µs/div ALD4701A/ALD4701B ALD4701 Advanced Linear Devices 5 of 9 TYPICAL APPLICATIONS RAIL-TO-RAIL VOLTAGE FOLLOWER/BUFFER TRANSCONDUCTANCE AMPLIFIER 5V ~ 1012Ω ZIN = VOUT RIN = 1012Ω 0.1µF - +5V + VIN RL VOUT IOUT + VIN RL = R2 1/4 ALD4701 0≤ VIN ≤ 5V VIN Min 0.0 0.0 1K 10K HIGH INPUT IMPEDANCE RAIL-TO-RAIL PRECISION DC SUMMING AMPLIFIER 1/4 ALD4701 VOUT Max 2.00 2.45 Min Max 0.0 4.00 0.0 4.90 R2 IOUT = VIN R2 PHOTO DETECTOR CURRENT TO VOLTAGE CONVERTER V+ = +2.5V RF = 5M 10M V1 + V2 10M 0.1µF I 1/4 ALD4701 VOUT 10M - 10M 0.1µF V3 V- ≤ VIN ≤ V+ V4 VOUT = 1 X RF RL = 100K + -2.5V V- ≤ VOUT ≤ V+ V- = - 2.5V 10M +2.5V - PHOTODIODE 1/4 ALD4701 10M VOUT = V1 + V2 - V3 - V4 RIN = 10MΩ Accuracy limited by resistor tolerances and input offset voltage RAIL-TO-RAIL WINDOW COMPARATOR WIEN BRIDGE OSCILLATOR (RAIL-TO-RAIL) SINE WAVE GENERATOR +5V - +5V 100K VOUT 1/4 ALD4701 + .01µF 2 10K -5V C = .01µF VREF (HIGH) 3 8 1/4 ALD4701 + 1 1/4 74 C00 VOUT VIN 5 + 7 10K 10K R = 10K 100K VREF (LOW) 6 - 4 1/4 ALD4701 ~ f= ~ 1.6KHZ 1 = 2πRC VOUT (LOW) for VREF (LOW) < VIN < VREF (HIGH) FUNCTION GENERATOR 0.1µF 100K 2 - 4 .01µF + 54K 0.002µF 0.002µF 1 10K 6 7 11 3 220K 100K +2.5V 100K 9 8 + -2.5V 5 Square Square Wave Wave 1/4 ALD4701 14 + 10 100K 27K 27K 13 - + Triangle Triangle Wave Wave 1/4 ALD4701 VOUT 12 10K 100K Sine Wave 27K -2X GAIN 1/4 ALD4701 1/4 ALD4701 ALD4701A/ALD4701B ALD4701 Advanced Linear Devices 6 of 9 SOIC-14 PACKAGE DRAWING 14 Pin Plastic SOIC Package Millimeters E S (45°) Dim Min A 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-14 8.55 8.75 0.336 0.345 E 3.50 4.05 0.140 0.160 1.27 BSC e D A 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 A1 e b S (45°) H L ALD4701A/ALD4701B ALD4701 C ø Advanced Linear Devices 7 of 9 PDIP-14 PACKAGE DRAWING 14 Pin Plastic DIP Package Millimeters E E1 D S A2 A1 A L Inches Dim A Min Max Min 3.81 5.08 0.105 Max 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-14 17.27 19.30 0.680 0.760 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-14 1.02 2.03 0.040 0.080 ø 0° 15° 0° 15° e b b1 c e1 ALD4701A/ALD4701B ALD4701 ø Advanced Linear Devices 8 of 9 CERDIP-14 PACKAGE DRAWING 14 Pin CERDIP Package Millimeters E E1 D A1 s A L L1 L2 b b1 e Inches Dim A Min Max Min 3.55 5.08 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-14 -- 19.94 -- 0.785 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 ALD4701A/ALD4701B ALD4701 ø Advanced Linear Devices 9 of 9