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ALD1721EDA Datasheet(PDF) 1 Page - Advanced Linear Devices |
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ALD1721EDA Datasheet(HTML) 1 Page - Advanced Linear Devices |
1 / 13 page Rev 2.1 ©2011 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286 www.aldinc.com GENERAL DESCRIPTION The ALD1721E is a monolithic rail-to-rail precision CMOS operational amplifier with integrated user programmable EPAD (Electrically Program- mable Analog Device) based offset voltage adjustment. The ALD1721E operational amplifier is a direct replacement of the ALD1701 operational amplifier, with the added feature of user-programmable offset voltage trimming resulting in significantly enhanced total system performance and user flexibility. EPAD technology is an exclusive ALD design which has been refined for analog applications where precision voltage trimming is necessary to achieve a desired performance. It utilizes CMOS FETs as in- circuit elements for trimming of offset voltage bias characteristics with the aid of a personal computer under software control. Once programmed, the set parameters are stored indefinitely within the device even after power- down. EPAD offers the circuit designer a convenient and cost-effective trimming solution for achieving the very highest amplifier/system perfor- mance. The ALD1721E operational amplifier features rail-to-rail input and output voltage ranges, tolerance to over-voltage input spikes of 300mV beyond supply rails, capacitive loading up to 50pF, extremely low input currents of 0.01pA typical, high open loop voltage gain, useful bandwidth of 700KHz, slew rate of 0.7V/ µs, and low typical supply current of 120µA. BENEFITS • Eliminates manual and elaborate system trimming procedures • Remote controlled automated trimming • In-System Programming capability • No external components • No internal chopper clocking noise • No chopper dynamic power dissipation • Simple and cost effective • Small package size • Extremely small total functional volume size • Low system implementation cost • Micropower and Low Voltage APPLICATIONS • Sensor interface circuits • Transducer biasing circuits • Capacitive and charge integration circuits • Biochemical probe interface • Signal conditioning • Portable instruments • High source impedance electrode amplifiers • Precision Sample and Hold amplifiers • Precision current to voltage converter • Error correction circuits • Sensor compensation circuits • Precision gain amplifiers • Periodic In-system calibration • System output level shifter KEY FEATURES • EPAD (Electrically Programmable Analog Device) • User programmable VOS trimmer • Computer-assisted trimming • Rail-to-rail input/output • Compatible with standard EPAD Programmer • High precision through in-system circuit precision trimming • Reduces or eliminates VOS, PSRR, CMRR and TCVOS errors • System level “calibration” capability • Application Specific Programming mode • In-System Programming mode • Electrically programmable to compensate for external component tolerances • Achieves 0.01pA input bias current and 35 µV input offset voltage simultaneously • Compatible with industry standard pinout PIN CONFIGURATION 1 2 2 3 4 8 7 6 5 VE1 -IN +IN VE2 OUT N/C V- V+ TOP VIEW SAL, PAL, DA PACKAGES * N/C Pin is internally connected. Do not connect externally. ORDERING INFORMATION (“L” suffix denotes lead-free (RoHS)) Operating Temperature Range 0 °C to +70°C0°C to +70°C -55 °C to +125°C 8-Pin 8-Pin 8-Pin Small Outline Plastic Dip CERDIP Package (SOIC) Package Package ALD1721ESAL ALD1721EPAL ALD1721EDA * Contact factory for leaded (non-RoHS) or high temperature versions. eEPAD TM ® N A B L E D E EPAD® MICROPOWER CMOS OPERATIONAL AMPLIFIER ALD1721E ADVANCED LINEAR DEVICES, INC. |
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