EVALUATION KIT AVAILABLE Precision, High-Bandwidth Op Amp

Transcription

1 19-227; Rev ; 9/1 EVALUATION KIT AVAILABLE Precision, High-Bandwidth Op Amp General Description The op amp features rail-to-rail output and MHz GBW at just 1mA supply current. At power-up, this device autocalibrates its input offset voltage to less than 1FV. It operates from a single-supply voltage of 2.V to.2v. The is available in a tiny 2mm x 2mm, -pin SC7 package and is rated over the -4NC to +12NC automotive temperature range. Features S MHz UGBW S Low Input Voltage Offset Voltage (1µV max) S Input Common-Mode Voltage Range Extends Below Ground S Wide 2.V to.2v Supply Range S Low 1mA Supply Current Power Modules Automotive Power Supplies ADC Drivers for Industrial Systems Instrumentation Filters Applications PART Ordering Information TEMP RANGE PIN- PACKAGE TOP MARK -4 C to AXK+T SC7 AUA +12 C +Denotes a lead(pb)-free/rohs-compliant package. T = Tape and reel. Typical Application Circuit INPUT.kI.kI 4.7nF 14.3kI 47pF V CC 2kI V CC /2 OUTPUT 2kI USING THE AS A LOWPASS BESSEL FILTER (CORNER FREQUENCY = 1kHz). Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at

2 ABSOLUTE MAXIMUM RATINGS Supply Voltage (V CC to GND)...-.3V to +.V All Other Pins...(GND -.3V) to (V CC +.3V) Short-Circuit Duration to GND or V CC... 1s Continuous Input Current (any pins)... Q2mA Thermal Limits (Note 1) Continuous Power Dissipation (T A = +7NC) -Pin SC7 (derate 3.1mW/NC above +7NC) mW Operating Temperature Range... -4NC to +12NC Junction Temperature...+NC Storage Temperature Range... -6NC to +NC Lead Temperature (soldering, 1s)...+3NC Soldering Temperature (reflow)...+26nc Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD1-7, using a fourlayer board. For detailed information on package thermal considerations, refer to Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V CC = V, V IN+ = V IN- = V, R L = 1kI to V CC /2, T A = -4NC to +12NC, unless otherwise noted. Typical values are at T A = +2NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Voltage Range V CC Guaranteed by PSRR 2.2 V Supply Current I CC No load T A = +2NC NC P T A P +12NC 2.1 ma Power-Supply Rejection Ratio PSRR T A = +2NC NC P T A P +12NC 93 db Power-Up Time t ON 3 ms DC SPECIFICATIONS After power-up autocalibration 8 1 Input Offset Voltage V OS -4NC P T A P +12NC 8 3 FV Input Offset Voltage Drift DV OS 3 FV/NC T A = +2NC 62 Input Bias Current I B -4NC P T A P +12NC 32 na T A = +2NC 3 12 Input Offset Current I OS -4NC P T A P +12NC 3 na Input Common-Mode Range V CM Guaranteed by CMRR, TA = -4NC to +12NC -.1 V CC -1.3 V Common-Mode Rejection Ratio CMRR T A = +2NC NC P T A P +12NC 8 db 4mV P V OUT P T A = +2NC V CC - 4mV -4NC P T A P +12NC 84 Large-Signal Gain A VOL 4mV P V OUT P T A = +2NC db V CC - 4mV, R L = 1kI to V CC /2-4NC P T A P +12NC 69 Output Voltage Swing V OH - VCC R L = 1kI to V CC /2 6 V OL R L = 1kI to GND, T A = +2NC 4 R L = 1kI to V CC /2 6 R L = 1kI to GND 48 Short-Circuit Current I SC (Note 3) 8 ma mv 2

3 ELECTRICAL CHARACTERISTICS (continued) (V CC = V, V IN+ = V IN- = V, R L = 1kI to V CC /2, T A = -4NC to +12NC, unless otherwise noted. Typical values are at T A = +2NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS AC SPECIFICATIONS Gain-Bandwidth Product GBW MHz Large-Signal Bandwidth BW LS V OUT = 2V P-P 3 MHz Slew Rate SR V OUT = 2V P-P, 1% to 9% 2 V/Fs Settling Time t S To.1%, V OUT = 2V P-P, C L = 1pF 2 ns Total Harmonic Distortion THD f = 1kHz, V OUT = 2V P-P 9 db Input Voltage Noise Density E N f = 1kHz 13 nv/ Hz Input Current Noise Density I N f = 1kHz 3 pa/ Hz Note 2: The device is 1% production tested at T A = +2NC. Temperature limits are guaranteed by design. Note 3: Guaranteed by design. (V CC = V, R L = 1kI to V CC /2, T A = +2NC, unless otherwise noted.) Typical Operating Characteristics SUPPLY CURRENT (ma) SUPPLY CURRENT vs. SUPPLY VOLTAGE toc1 QUIESCENT CURRENT (ma) QUIESCENT CURRENT vs. TEMPERATURE toc2 INPUT OFFSET VOLTAGE (µv) INPUT OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE toc SUPPLY VOLTAGE (V) COMMON-MODE VOLTAGE (V) OFFSET VOLTAGE (µv) OFFSET VOLTAGE vs. TEMPERATURE toc4 INPUT OFFSET VOLTAGE (µv) V CM = V INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE toc OCCURANCE (%) OFFSET VOLTAGE HISTOGRAM toc SUPPLY VOLTAGE (V) OFFSET VOLTAGE (µv) 3

4 Typical Operating Characteristics (continued) (V CC = V, R L = 1kI to V CC /2, T A = +2NC, unless otherwise noted.) OUTPUT HIGH VOLTAGE (mv) OUTPUT HIGH VOLTAGE vs. TEMPERATURE SOURCING CURRENT (V CC - V OUT) 2 1 I SOURCE = ma I SOURCE = 1mA I SOURCE =.1mA toc7 OUTPUT LOW VOLTAGE (mv) OUTPUT LOW VOLTAGE vs. TEMPERATURE SINKING CURRENT I SINK = ma I SINK = 1mA I SINK =.1mA toc8 INPUT BIAS CURRENT (na) INPUT BIAS CURRENT vs. TEMPERATURE 2 1 IN+ IN- toc9 I SOURCE =.1mA I SINK =.1mA INPUT BIAS CURRENT (na) 2 1 INPUT BIAS CURRENT vs. TEMPERATURE IN+ IN- toc1 CMRR (db) COMMON-MODE REJECTION RATIO vs. FREQUENCY toc11 PSRR (db) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY toc , FREQUENCY (khz) , FREQUENCY (khz) 4nV/div.1Hz TO 1Hz INPUT VOLTAGE NOISE toc13 INPUT VOLTAGE NOISE (nv/ Hz) INPUT VOLTAGE NOISE vs. FREQUENCY toc14 INPUT CURRENT NOISE (pa/ Hz) INPUT CURRENT NOISE vs. FREQUENCY toc 1s/div , FREQUENCY (Hz) , FREQUENCY (Hz) 4

5 Typical Operating Characteristics (continued) (V CC = V, R L = 1kI to V CC /2, T A = +2NC, unless otherwise noted.) V CC V/div GND V OUT mv/div GND TURN-ON RESPONSE V IN = 22.34mV, A V = 1V/V toc16 QUIESCENT CURRENT (ma) QUIESCENT CURRENT vs. TEMPERATURE V CC = V, V OUT IN SATURATION V OUT = HIGH V OUT = LOW toc OUTPUT RECOVERY FROM SATURATION V OUT SATURATED TO POSITIVE RAIL toc18 OUTPUT RECOVERY FROM SATURATION V OUT SATURATED TO NEGATIVE RAIL toc19 V OUT 1V/div V OUT 1V/div GND GND 4µs/div 4µs/div -4 - TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY toc OPEN-LOOP GAIN vs. FREQUENCY toc21 THD+N (%) OPEN-LOOP GAIN (db) , 1, FREQUENCY (khz) , 1, FREQUENCY (khz)

6 Typical Operating Characteristics (continued) (V CC = V, R L = 1kI to V CC /2, T A = +2NC, unless otherwise noted.) OUTPUT A V = 1V/V LARGE-SIGNAL RESPONSE toc22 OUTPUT mv/div A V = 1V/V SMALL-SIGNAL RESPONSE toc23 1µs/div 4µs/div ISOLATION RESISTANCE (I) CAPACITIVE LOADING STABILITY vs. ISOLATION RESISTANCE, A V = 1V/V STABLE UNSTABLE toc24 LOAD RESISTANCE (I) 1, 1 PARALLEL CAPACITIVE LOADING V CC = V UNSTABLE STABLE toc CAPACITANCE (pf) CAPACITANCE (pf) -2 CROSSTALK vs. FREQUENCY toc26 CROSSTALK (db) , 1, FREQUENCY (khz) 6

7 TOP VIEW IN+ + 1 V CC Pin Configuration GND 2 IN- 3 4 OUT SC7 Pin Description PIN NAME FUNCTION 1 IN+ Positive Input 2 GND Ground 3 IN- Negative Input 4 OUT Output V CC Positive Power Supply. Bypass with a.1ff capacitor to ground. 7

8 Detailed Description The is a power-efficient, high-speed op amp ideal for capturing fast edges in a wide variety of signal processing applications. It precisely calibrates its VOS on power-up to eliminate the effects of package stresses, power supplies, and temperature. Applications Information Power-Up Autotrim The features power-up autotrimming that allows the devices to achieve less than 1FV of input offset voltage. The startup sequence takes approximately 4ms to complete after the supply voltage exceeds an internal threshold of 1.8V. During this time, the inputs and outputs are connected to an auxiliary amplifier that has an input offset of mv (typ). As soon as the autotrimming is completed, the inputs and outputs switch from the auxiliary amplifier to the calibrated amplifier. The calibration settings hold until the supply voltage drops below an internal threshold of 1.4V. This could be used to recalibrate the amplifier. The supply current of the part increases to about 2.mA during the power-up autotrim period. Use good supply decoupling with low ESR capacitors. Active Filters The is ideal for a wide variety of active filter circuits that make use of their wide output voltage swings and large bandwidth capabilities. The Typical Application Circuit shows a multiple feedback active filter circuit example with a 1kHz corner frequency. At low frequencies, the amplifier behaves like a simple low-distortion inverting amplifier gain = -1, while its high bandwidth gives excellent stopband attenuation above its corner frequency. See the Typical Application Circuit. Input Differential Voltage Protection During normal op-amp operation, the inverting and noninverting inputs of the are at essentially the same voltage. However, either due to fast input voltage transients or due to loss of negative feedback, these pins can be forced to different voltages. Internal back-to-back diodes and series resistors protect input-stage transistors from large input differential voltages (see Figure 2). IN+ and IN- can survive any voltage between the powersupply rails. This op amp has been designed to exhibit no phase inversion to overdriven inputs. V CC V OUT V 1.8V V 2V V AUXILIARY AMPLIFIER ACTIVE 4ms Figure 1. Autotrim Timing Diagram 1I 1I CALIBRATED AMPLIFIER ACTIVE Figure 2. Input Protection Circuit 8

9 Package Information For the latest package outline information and land patterns, go to Note that a +, #, or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE No. LAND PATTERN NO. SC7 X SC7, L.EPS PACKAGE OUTLINE, L SC E 1 1 9

10 REVISION NUMBER REVISION DATE DESCRIPTION Revision History PAGES CHANGED 9/1 Initial release Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 1 Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

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