Low Cost Low Power Instrumentation Amplifier AD620

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1 Low Cost Low Power Instrumentation Amplifier AD60 FEATURES Easy to use Gain set with one external resistor (Gain range to 0,000) Wide power supply range (±.3 V to ±8 V) Higher performance than 3 op amp IA designs Available in 8-lead DIP and SOIC packaging Low power,.3 ma max supply current Excellent dc performance (B grade) 50 µv max, input offset voltage 0.6 µv/ C max, input offset drift.0 na max, input bias current 00 db min common-mode rejection ratio (G = 0) Low noise 9 nv/ khz, input voltage noise 0.8 µv p-p noise (0. Hz to 0 Hz) Excellent ac specifications 0 khz bandwidth (G = 00) 5 µs settling time to 0.0% APPLICATIONS Weigh scales ECG and medical instrumentation Transducer interface Data acquisition systems Industrial process controls Battery-powered and portable equipment CONNECTION DIAGRAM R G IN +IN V S 3 4 AD60 TOP VIEW R G +V S OUTPUT REF Figure. 8-Lead PDIP (N), CERDIP (Q), and SOIC (R) Packages PRODUCT DESCRIPTION The AD60 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of to 0,000. Furthermore, the AD60 features 8-lead SOIC and DIP packaging that is smaller than discrete designs and offers lower power (only.3 ma max supply current), making it a good fit for battery-powered, portable (or remote) applications. The AD60, with its high accuracy of 40 ppm maximum nonlinearity, low offset voltage of 50 µv max, and offset drift of 0.6 µv/ C max, is ideal for use in precision data acquisition systems, such as weigh scales and transducer interfaces. Furthermore, the low noise, low input bias current, and low power of the AD60 make it well suited for medical applications, such as ECG and noninvasive blood pressure monitors. The low input bias current of.0 na max is made possible with the use of Superϐeta processing in the input stage. The AD60 works well as a preamplifier due to its low input voltage noise of 9 nv/ Hz at khz, 0.8 µv p-p in the 0. Hz to 0 Hz band, and 0. pa/ Hz input current noise. Also, the AD60 is well suited for multiplexed applications with its settling time of 5 µs to 0.0%, and its cost is low enough to enable designs with one in-amp per channel ,000 0,000 TOTAL ERROR, PPM OF FULL SCALE 5,000 0,000 5,000 0,000 5,000 R G AD60A 3 OP AMP IN-AMP (3 OP-07s) RTI VOLTAGE NOISE (0. 0Hz) (µv p-p), G = 00 TYPICAL STANDARD BIPOLAR INPUT IN-AMP AD60 SUPERβETA BIPOLAR INPUT IN-AMP SUPPLY CURRENT (ma) k 0k 00k M SOURCE RESISTANCE (Ω) 0M 00M Figure. Three Op Amp IA Designs vs. AD60 Rev. G 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 that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Figure 3. Total Voltage Noise vs. Source Resistance

2 SPECIFICATIONS 5 C,, and RL = kω, unless otherwise noted. Table. AD60A AD60B AD60S Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Unit GAIN G = + (49.4 kω/rg) Gain Range 0,000 0,000 0,000 Gain Error VOUT = ±0 V G = % G = % G = % G = % Nonlinearity VOUT = 0 V to +0 V G = 000 RL = 0 kω ppm G = 00 RL = kω ppm Gain vs. Temperature G = ppm/ C Gain > ppm/ C VOLTAGE OFFSET (Total RTI Error = VOSI + VOSO/G) Input Offset, VOSI µv to ± 5 V Overtemperature µv to ± 5 V Average TC µv/ C to ± 5 V Output Offset, VOSO µv VS = ± 5 V µv Overtemperature µv to ± 5 V Average TC µv/ C to ± 5 V Offset Referred to the Input vs. Supply (PSR) VS = ±.3 V to ±8 V G = db G = db G = db G = db INPUT CURRENT Input Bias Current na Overtemperature na Average TC pa/ C Input Offset Current na Overtemperature na Average TC pa/ C INPUT Input Impedance Differential GΩ_pF Common-Mode GΩ_pF Input Voltage Range 3 VS = ±.3 V VS +.9 +VS. VS +.9 +VS. VS +.9 +VS. V to ±5 V Overtemperature VS +. +VS.3 VS +. +VS.3 VS +. +VS.3 V VS = ± 5 V VS +.9 +VS.4 VS +.9 +VS.4 VS +.9 +VS.4 V to ±8 V Overtemperature VS +. +VS.4 VS +. +VS +. VS +.3 +VS.4 V Rev. G Page 3 of 0

3 AD60A AD60B AD60S Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Unit Common-Mode Rejection Ratio DC to 60 Hz with kω Source Imbalance VCM = 0 V to ± 0 V G = db G = db G = db G = db OUTPUT Output Swing RL = 0 kω VS = ±.3 V to ± 5 V VS + +VS. VS +. +VS. VS +. +VS. V. Overtemperature VS +.4 +VS.3 VS +.4 +VS.3 VS +.6 +VS.3 V to ± 8 V VS +. +VS.4 VS +. +VS.4 VS +. +VS.4 V Overtemperature VS +.6 +VS.5 VS +.6 +VS.5 VS +.3 +VS.5 V Short Circuit Current ±8 ±8 ±8 ma DYNAMIC RESPONSE Small Signal 3 db Bandwidth G = khz G = khz G = khz G = 000 khz Slew Rate V/µs Settling Time to 0.0% 0 V Step G = µs G = µs NOISE Voltage Noise, khz Total RTI Noise = ( e ni ) + ( e / G) no Input, Voltage Noise, eni nv/ Hz Output, Voltage Noise, eno nv/ Hz RTI, 0. Hz to 0 Hz G = µv p-p G = µv p-p G = µv p-p Current Noise f = khz fa/ Hz 0. Hz to 0 Hz pa p-p REFERENCE INPUT RIN kω IIN VIN+, VREF = µa Voltage Range VS +.6 +VS.6 VS +.6 +VS.6 VS +.6 +VS.6 V Gain to Output ± ± ± POWER SUPPLY Operating Range 4 ±.3 ±8 ±.3 ±8 ±.3 ±8 V Quiescent Current VS = ±.3 V ma to ±8 V Overtemperature ma TEMPERATURE RANGE For Specified Performance 40 to to to +5 C See Analog Devices military data sheet for 883B tested specifications. Does not include effects of external resistor RG. 3 One input grounded. G =. 4 This is defined as the same supply range that is used to specify PSR. Rev. G Page 4 of 0

4 ABSOLUTE IMUM RATINGS Table. Parameter Rating Supply Voltage ±8 V Internal Power Dissipation 650 mw Input Voltage (Common-Mode) ±VS Differential Input Voltage 5 V Output Short-Circuit Duration Indefinite Storage Temperature Range (Q) 65 C to +50 C Storage Temperature Range (N, R) 65 C to +5 C Operating Temperature Range AD60 (A, B) 40 C to +85 C AD60 (S) 55 C to +5 C Lead Temperature Range (Soldering 0 seconds) 300 C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other condition s above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Specification is for device in free air: 8-Lead Plastic Package: θja = 95 C 8-Lead CERDIP Package: θja = 0 C 8-Lead SOIC Package: θja = 55 C ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. G Page 5 of 0

5 OUTLINE DIMENSIONS PIN 0.0 (5.33) 0.50 (3.8) 0.30 (3.30) 0.5 (.9) 0.0 (0.56) 0.08 (0.46) 0.04 (0.36) (0.6) (9.7) (9.0) (.54) BSC (.78) (.5) (.4) (7.) 0.50 (6.35) (6.0) 0.05 (0.38) SEATING (0.3) (.5) 0.05 (0.38) GAUGE 0.35 (8.6) 0.30 (7.87) (7.6) (0.9) COMPLIANT TO JEDEC STANDARDS MS-00-BA CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. CORNER LEADS MAY BE CONFIGURED AS WHOLE OR HALF LEADS. Figure Lead Plastic Dual In-Line Package [PDIP] Narrow Body (N-8). Dimensions shown in inches and (millimeters) 0.95 (4.95) 0.30 (3.30) 0.5 (.9) 0.04 (0.36) 0.00 (0.5) (0.0) 4.00 (0.574) 3.80 (0.497) 0.5 (0.0098) 0.0 (0.0040) COPLANARITY (0.968) 4.80 (0.890) 8 5 SEATING 4.7 (0.0500) BSC 6.0 (0.440) 5.80 (0.84).75 (0.0688).35 (0.053) 0.5 (0.00) 0.3 (0.0) 0.5 (0.0098) 0.7 (0.0067) 0.50 (0.096) 0.5 (0.0099) 45.7 (0.0500) 0.40 (0.057) COMPLIANT TO JEDEC STANDARDS MS-0AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN 8 0 Figure 5. 8-Lead Standard Small Outline Package [SOIC] Narrow Body (R-8) Dimensions shown in millimeters and (inches) (0.3) (.40) PIN (7.87) 0.0 (5.59) 0.00 (5.08) 0.00 (5.08) 0.5 (3.8) 0.03 (0.58) 0.04 (0.36) 0.00 (.54) BSC (0.9) (.78) (0.76) (.5) 0.05 (0.38) 0.50 (3.8) SEATING CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN (8.3) 0.90 (7.37) 0.05 (0.38) (0.0) Figure 5. 8-Lead Ceramic Dual In-Line Package [CERDIP] (Q-8) Dimensions shown in inches and (millimeters) Rev. G Page 9 of 0

6 ORDERING GUIDE Model Temperature Range Package Option AD60AN 40 C to +85 C N-8 AD60ANZ 40 C to +85 C N-8 AD60BN 40 C to +85 C N-8 AD60BNZ 40 C to +85 C N-8 AD60AR 40 C to +85 C R-8 AD60ARZ 40 C to +85 C R-8 AD60AR-REEL 40 C to +85 C 3" REEL AD60ARZ-REEL 40 C to +85 C 3" REEL AD60AR-REEL7 40 C to +85 C 7" REEL AD60ARZ-REEL7 40 C to +85 C 7" REEL AD60BR 40 C to +85 C R-8 AD60BRZ 40 C to +85 C R-8 AD60BR-REEL 40 C to +85 C 3" REEL AD60BRZ-RL 40 C to +85 C 3" REEL AD60BR-REEL7 40 C to +85 C 7" REEL AD60BRZ-R7 40 C to +85 C 7" REEL AD60ACHIPS 40 C to +85 C Die Form AD60SQ/883B 55 C to +5 C Q-8 N = Plastic DIP; Q = CERDIP; R = SOIC. Z = Pb-free part. Rev. G Page 0 of 0