® OPA OPA244 OPA2244 OPA4244 OPA 244 224 4 OPA OPA 244 ® 424 OPA 4 224 4 MicroPower, Single-Supply OPERATIONAL AMPLIFIERS MicroAmplifier ™ Series FEATURES DESCRIPTION ● MicroSIZE PACKAGES OPA244 (Single): SOT-23-5 OPA2244 (Dual): MSOP-8 OPA4244 (Quad): TSSOP-14 ● MicroPOWER: IQ = 50µA/channel ● SINGLE SUPPLY OPERATION ● WIDE BANDWIDTH: 430kHz ● WIDE SUPPLY RANGE: Single Supply: 2.2V to 36V Dual Supply: ±1.1V to ±18V The OPA244 (single), OPA2244 (dual), and OPA4244 (quad) op amps are designed for very low quiescent current (50µA/channel), yet achieve excellent bandwidth. Ideal for battery powered and portable instrumentation, all versions are offered in micro packages for space-limited applications. The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded. The OPA244 series is easy to use and free from phase inversion and overload problems found in some other op amps. These amplifiers are stable in unity gain and excellent performance is maintained as they swing to their specified limits. They can be operated from single (+2.2V to +36V) or dual supplies (±1.1V to ±18V). The input common-mode voltage range includes ground—ideal for many single supply applications. All versions have similar performance. However, there are some differences, such as common-mode rejection. All versions are interchangeable in most applications. All versions are offered in miniature, surface-mount packages. OPA244 (single version) comes in the tiny 5-lead SOT-23-5 surface mount, SO-8 surface mount, and 8-pin DIP. OPA2244 (dual version) is available in the MSOP-8 surface mount, SO-8 surface-mount, and 8-pin DIP. The OPA4244 (quad) comes in the TSSOP-14 surface mount. They are fully specified from –40°C to +85°C and operate from –55°C to +125°C. A SPICE Macromodel is available for design analysis. APPLICATIONS ● ● ● ● ● BATTERY POWERED SYSTEMS PORTABLE EQUIPMENT PCMCIA CARDS BATTERY PACKS AND POWER SUPPLIES CONSUMER PRODUCTS OPA244 Out 1 5 V+ 4 –In V– 2 +In 3 OPA4244 SOT-23-5 OPA2244 OPA244 NC 1 8 NC Out A 1 –In 2 7 V+ –In A 2 +In 3 6 Output +In A 3 V– 4 5 NC V– 4 8-Pin DIP, SO-8 A B 8 V+ 7 Out B 6 –In B 5 +In B 8-Pin DIP, SO-8, MSOP-8 Output A 1 14 Output D –Input A 2 13 –Input D +Input A 3 12 +Input D +V 4 11 –V +Input B 5 10 +Input C –Input B 6 9 –Input C Output B 7 8 Output C TSSOP-14 International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 © 1999 Burr-Brown Corporation PDS-1437C Printed in U.S.A. December, 1999 SPECIFICATIONS: VS = +2.6V to +36V Boldface limits apply over the specified temperature range, TA = –40°C to +85°C At TA = +25°C, RL = 20kΩ connected to ground, unless otherwise noted. OPA244NA, PA, UA PARAMETER CONDITION OFFSET VOLTAGE Input Offset Voltage TA = –40°C to 85°C vs Temperature vs Power Supply TA = –40°C to 85°C OUTPUT Voltage Output, Positive TA = –40°C to 85°C Voltage Output, Negative TA = –40°C to 85°C Voltage Output, Positive TA = –40°C to 85°C Voltage Output, Negative TA = –40°C to 85°C Short-Circuit Current Capacitive Load Drive POWER SUPPLY Specified Voltage Range Minimum Operating Voltage Quiescent Current TA = –40°C to 85°C TEMPERATURE RANGE Specified Range Operating Range Storage Range Thermal Resistance SOT-23-5 Surface-Mount SO-8 Surface-Mount 8-Pin DIP UNITS ±1.5 ±2 ±0.7 dVOS/dT PSRR TA = –40°C to 85°C VS = +2.6V to +36V VS = +2.6V to +36V ±4 5 50 50 mV mV µV/°C µV/V µV/V VCM = VS /2 VCM = VS /2 –10 ±1 –25 ±10 nA nA IB IOS VCM CMRR VS = ±18V, VCM = –18V to +17.1V VS = ±18V, VCM = –18V to +17.1V VO = 0.5V to (V+) – 0.9 VO = 0.5V to (V+) – 0.9 AOL GBW SR VO µVp-p nV/√Hz fA/√Hz 0.4 22 40 en in 0 84 84 INPUT IMPEDANCE Differential Common-Mode FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time 0.01% Overload Recovery Time MAX VS = ±7.5V, VCM = 0 NOISE Input Voltage Noise, f = 0.1kHz to 10kHz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz OPEN-LOOP GAIN Open-Loop Voltage Gain TA = –40°C to 85°C TYP(1) VOS INPUT BIAS CURRENT Input Bias Current Input Offset Current INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection TA = –40°C to 85°C MIN 86 86 G=1 10V Step VIN • Gain = VS AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground (V+) – 0.9 (V+) – 0.9 0.5 0.5 TA = –40°C to 85°C +2.6 ISC CLOAD VS IQ 98 (V+) – 0.9 V dB dB 106 || 2 109 || 2 Ω || pF Ω || pF 106 dB dB 430 –0.1/+0.16 150 8 kHz V/µs µs µs (V+) – 0.75 (V+) – 0.75 0.2 0.2 (V+) – 0.75 (V+) – 0.75 0.1 0.1 –25/+12 See Typical Curve V V V V V V V V mA +36 +2.2 50 IO = 0 IO = 0 –40 –55 –65 θJA 200 150 100 60 70 V V µA µA 85 125 150 °C °C °C °C/W °C/W °C/W NOTE: (1) VS = +15V. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ® OPA244, 2244, 4244 2 SPECIFICATIONS: VS = +2.6V to +36V Boldface limits apply over the specified temperature range, TA = –40°C to +85°C At TA = +25°C, RL = 20kΩ connected to ground, unless otherwise noted. OPA2244EA, PA, UA PARAMETER OFFSET VOLTAGE Input Offset Voltage TA = –40°C to 85°C vs Temperature vs Power Supply TA = –40°C to 85°C Channel Separation CONDITION OUTPUT Voltage Output, Positive TA = –40°C to 85°C Voltage Output, Negative TA = –40°C to 85°C Voltage Output, Positive TA = –40°C to 85°C Voltage Output, Negative TA = –40°C to 85°C Short-Circuit Current Capacitive Load Drive POWER SUPPLY Specified Voltage Range Minimum Operating Voltage Quiescent Current (per amplifier) TA = –40°C to 85°C TEMPERATURE RANGE Specified Range Operating Range Storage Range Thermal Resistance MSOP-8 Surface-Mount SO-8 Surface-Mount 8-Pin DIP UNITS ±1.5 ±2 mV mV µV/°C µV/V µV/V dB ±0.7 dVOS/dT PSRR TA = –40°C to 85°C VS = +2.6V to +36V VS = +2.6V to +36V ±4 5 50 50 140 IB IOS VCM = VS /2 VCM = VS /2 –10 ±1 VCM CMRR AOL GBW SR VO VS = ±18V, VCM = –18V to +17.1V VS = ±18V, VCM = –18V to +17.1V 0 72 72 VO = 0.5V to (V+) – 0.9 VO = 0.5V to (V+) – 0.9 86 86 G=1 10V Step VIN • Gain = VS AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground (V+) – 0.9 (V+) – 0.9 0.5 0.5 TA = –40°C to 85°C +2.6 ISC CLOAD VS IQ –25 ±10 98 (V+) – 0.9 V dB dB 106 || 2 109 || 2 Ω || pF Ω || pF 106 dB dB 430 –0.1/+0.16 150 8 kHz V/µs µs µs (V+) – 0.75 (V+) – 0.75 0.2 0.2 (V+) – 0.75 (V+) – 0.75 0.1 0.1 –25/+12 See Typical Curve V V V V V V V V mA +36 +2.2 40 IO = 0 IO = 0 nA nA µVp-p nV/√Hz fA/√Hz 0.4 22 40 en in INPUT IMPEDANCE Differential Common-Mode FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time 0.01% Overload Recovery Time MAX VS = ±7.5V, V CM = 0 NOISE Input Voltage Noise, f = 0.1kHz to 10kHz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz OPEN-LOOP GAIN Open-Loop Voltage Gain TA = –40°C to 85°C TYP(1) VOS INPUT BIAS CURRENT Input Bias Current Input Offset Current INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection TA = –40°C to 85°C MIN –40 –55 –65 50 63 V V µA µA 85 125 150 °C °C °C θJA 200 150 100 °C/W °C/W °C/W NOTE: (1) VS = +15V. ® 3 OPA244, 2244, 4244 SPECIFICATIONS: VS = +2.6V to +36V Boldface limits apply over the specified temperature range, TA = –40°C to +85°C At TA = +25°C, RL = 20kΩ connected to ground, unless otherwise noted. OPA4244EA PARAMETER CONDITION OFFSET VOLTAGE Input Offset Voltage TA = –40°C to 85°C vs Temperature vs Power Supply TA = –40°C to 85°C Channel Separation OUTPUT Voltage Output, Positive TA = –40°C to 85°C Voltage Output, Negative TA = –40°C to 85°C Voltage Output, Positive TA = –40°C to 85°C Voltage Output, Negative TA = –40°C to 85°C Short-Circuit Current Capacitive Load Drive POWER SUPPLY Specified Voltage Range Minimum Operating Voltage Quiescent Current (per amplifier) TA = –40°C to 85°C TEMPERATURE RANGE Specified Range Operating Range Storage Range Thermal Resistance TSSOP-14 Surface Mount UNITS ±1.5 ±2 mV mV µV/°C µV/V µV/V dB ±0.7 dVOS/dT PSRR TA = –40°C to 85°C VS = +2.6V to +36V VS = +2.6V to +36V ±4 5 50 50 140 VCM = VS /2 VCM = VS /2 IB IOS –10 ±1 VCM CMRR VS = ±18V, VCM = –18V to +17.1V VS = ±18V, VCM = –18V to +17.1V VO = 0.5V to (V+) – 0.9 VO = 0.5V to (V+) – 0.9 AOL GBW SR VO –25 ±10 0 82 82 86 86 G=1 10V Step VIN • Gain = VS AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to VS/2 AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground AOL ≥ 80dB, RL = 20kΩ to Ground (V+) – 0.9 (V+) – 0.9 0.5 0.5 TA = –40°C to 85°C +2.6 ISC CLOAD VS IQ 104 (V+) – 0.9 V dB dB 106 || 2 109 || 2 Ω || pF Ω || pF 106 dB dB 430 –0.1/+0.16 150 8 kHz V/µs µs µs (V+) – 0.75 (V+) – 0.75 0.2 0.2 (V+) – 0.75 (V+) – 0.75 0.1 0.1 –25/+12 See Typical Curve V V V V V V V V mA +36 +2.2 40 IO = 0 IO = 0 –40 –55 –65 θJA 100 NOTE: (1) VS = +15V. ® OPA244, 2244, 4244 4 nA nA µVp-p nV/√Hz fA/√Hz 0.4 22 40 en in INPUT IMPEDANCE Differential Common-Mode FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time 0.01% Overload Recovery Time MAX VS = ±7.5V, VCM = 0 NOISE Input Voltage Noise, f = 0.1kHz to 10kHz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz OPEN-LOOP GAIN Open-Loop Voltage Gain TA = –40°C to 85°C TYP(1) VOS INPUT BIAS CURRENT Input Bias Current Input Offset Current INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection TA = –40°C to 85°C MIN 60 70 V V µA µA 85 125 150 °C °C °C °C/W ABSOLUTE MAXIMUM RATINGS(1) ELECTROSTATIC DISCHARGE SENSITIVITY Supply Voltage, V+ to V– .................................................................... 36V Input Voltage Range(2) ................................... (V–) – 0.3V to (V+) + 0.3V Input Current(2) ................................................................................. 10mA Output Short-Circuit(3) .............................................................. Continuous Operating Temperature .................................................. –55°C to +125°C Storage Temperature ..................................................... –65°C to +150°C Junction Temperature ...................................................................... 150°C Lead Temperature (soldering, 10s) ................................................. 300°C ESD Capability ................................................................................ 2000V This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. NOTES: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. (2) Inputs are diode-clamped to the supply rails and should be current-limited to 10mA or less if input voltages can exceed rails by more than 0.3V. (3) Short-circuit to ground, one amplifier per package. PACKAGE /ORDERING INFORMATION PRODUCT PACKAGE PACKAGE DRAWING NUMBER Single OPA244NA SOT-23-5 Surface-Mount 331 –40°C to +85°C A44 " " " " 8-Pin DIP SO-8 Surface-Mount 006 182 –40°C to +85°C –40°C to +85°C OPA244PA OPA244UA " OPA244PA OPA244UA SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ORDERING NUMBER(1) TRANSPORT MEDIA OPA244NA/250 OPA244NA/3K OPA244PA OPA244UA OPA244UA/2K5 Tape and Reel Tape and Reel Rails Rails Tape and Reel OPA2244EA/250 OPA2244EA/2K5 OPA2244PA OPA2244UA OPA2244UA/2K5 Tape and Reel Tape and Reel Rails Rails Tape and Reel OPA4244EA/250 OPA4244EA/2K5 Tape and Reel Tape and Reel " " " " " Dual OPA2244EA MSOP-8 Surface-Mount 337 –40°C to +85°C A44 " " " " " OPA2244PA OPA2244UA 8-Pin DIP SO-8 Surface-Mount 006 182 –40°C to +85°C –40°C to +85°C OPA2244PA OPA2244UA " " " " " Quad OPA4244EA TSSOP-14 Surface-Mount 357 –40°C to +85°C OPA4244EA " " " " " NOTE: (1) Products followed by a slash (/) are only available in Tape and Reel in the quantities indicated (e.g., /250 indicates 250 devices per reel). Ordering 3000 pieces of “OPA244NA/3K” will get a single 3000 piece Tape and Reel. ® 5 OPA244, 2244, 4244 TYPICAL PERFORMANCE CURVES At TA = 25°C, VS = +15V, and RL = 20kΩ connected to Ground, unless otherwise noted. CHANNEL SEPARATION OPEN-LOOP GAIN AND PHASE vs FREQUENCY 180 160 140 120 –60 130 Phase 100 –80 –100 80 60 –120 Gain Separation (dB) 150 –40 All Models Phase(°) –20 140 160 AOL (dB) 0 120 –140 20 –160 80 0 –180 70 –20 –200 60 10 100 10k 1k 100k OPA4244 100 40 1 OPA244 110 OPA2244 90 1M 1 10 100 10k 1k 100k Frequency (Hz) Frequency (Hz) POWER SUPPLY AND COMMON-MODE REJECTION vs FREQUENCY 110 120 100 110 100 90 PSRR, CMRR (dB) PSRR, CMRR (dB) OPA244 80 OPA2244 CMRR 70 OPA4244 60 50 90 80 CMRR 70 60 50 40 PSRR PSRR 40 30 30 10 100 1k 10k 100k 1 1M 10 100 OPEN-LOOP GAIN vs LOAD RESISTANCE 100k 1M OUTPUT VOLTAGE SWING vs OUTPUT CURRENT 15 120 VO = ±5V Output Voltage Swing (V) 110 100 Gain(dB) 10k 1k Frequency (Hz) Frequency (Hz) 90 80 70 14 RL to VS /2 13 25°C 12 125°C 11 –55°C 10 –10 –11 –55°C –12 125°C –13 –14 25°C –15 60 10 1 100 0 Load (kΩ) ±4 ±6 ±8 Output Current (mA) ® OPA244, 2244, 4244 ±2 6 ±10 ±12 ±14 TYPICAL PERFORMANCE CURVES (Cont.) At TA = 25°C, VS = +15V, and RL = 20kΩ connected to Ground, unless otherwise noted. INPUT BIAS CURRENT vs INPUT COMMON-MODE VOLTAGE INPUT BIAS CURRENT vs TEMPERATURE –12 –12 –11 Bias Current (nA) Bias Current (nA) –10 –8 –6 –10 –IB –9 +IB –8 –7 –4 –6 –2 –15 –10 –5 0 5 10 –5 –75 15 –50 –25 0 Common-Mode Voltage (V) AOL, CMRR, PSRR vs TEMPERATURE 0.20 120 0.18 Slew Rate (V/µs) 110 CMRR 100 95 AOL 90 100 125 0.14 0.12 –SR 0.10 0.08 VS = ±7.5, RL = 20kΩ, CL = 100pF, Gain = +1 0.06 0.04 85 0.02 0.00 –75 –50 0 –25 25 75 50 100 –75 125 –25 75 25 175 125 Temperature(°C) Temperature (°C) COMMON-MODE REJECTION vs SUPPY VOLTAGE QUIESCENT CURRENT AND SHORT-CIRCUIT vs SUPPLY VOLTAGE 52 100 48 Quiescent Current (µA) 120 80 60 40 20 0 35 IQ 30 44 25 –ISC 40 20 36 15 +ISC 32 10 28 5 24 0 4 8 12 16 20 24 28 32 36 0 0 Suppy Voltage (V) Short-Circuit Current (mA) 80 CMRR (dB) 75 +SR 0.16 PSRR 105 50 SLEW RATE vs TEMPERATURE 125 115 25 Temperature (°C) 4 8 12 16 20 24 28 32 36 Supply Voltage (V) ® 7 OPA244, 2244, 4244 TYPICAL PERFORMANCE CURVES (Cont.) At TA = 25°C, VS = +15V, and RL = 20kΩ connected to Ground, unless otherwise noted. 50 –ISC 45 40 ±10 +ISC 35 25 –75 –50 –25 0 25 50 75 100 0 125 –75 –50 0 –25 100 Voltage Noise 10 Output Voltage (Vp-p) Current Noise Current Noise (fA√Hz) Voltage Noise (nV√Hz) 50 75 100 0 125 MAXIMUM OUTPUT VOLTAGE vs FREQUENCY 100 VS = 36V 30 25 20 VS =15V 15 10 5 1 1k 10k 1 100k VS = 2.7V 0 100 1k 10k 100k 1M Frequency(Hz) Frequency (Hz) SMALL SIGNAL OVERSHOOT vs LOAD CAPACITANCE 70% 60 OPA244 OPA4244 60% G = +1 G = –2 OPA2244 50% 40 Overshoot (%) Overshoot (%) 25 40 35 50 +10 20 1000 100 +15 +ISC Temperature (°C) 1000 10 –15 IQ +5 INPUT VOLTAGE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY 1 –20 30 Temperature (°C) 10 –25 –ISC 35 ±5 30 –30 OPA4244 G = –1 30 G = +3 20 40% G = +1, RL = ∞ 30% 20% G = +1, RL = 20kΩ G = +2, RL = 20kΩ 10 10% G = +3, RL = 20kΩ 0% 0 100 1k 10 10k ® OPA244, 2244, 4244 100 1k Load Capacitance (pF) Load Capacitance (pF) 8 10k Short-Circuit Current (mA) 55 Quiescent Current (µA) Quiescent Current (µA) 60 Short-Circuit Current (mA) QUIESCENT AND SHORT-CIRCUIT CURRENT vs TEMPERATURE ±40 60 OPA244 ±35 55 OPA2244 ±30 50 ±25 45 ±20 IQ 40 ±15 65 TYPICAL PERFORMANCE CURVES (Cont.) At TA = 25°C, VS = +15V, and RL = 20kΩ connected to Ground, unless otherwise noted. LARGE-SIGNAL STEP RESPONSE, G = 1, CL = 100pF OPA244 OPA4244 2V/div 2V/div OPA2244 50µs/div 25µs/div SMALL-SIGNAL STEP RESPONSE, G = 1, CL = 100pF OPA244 OPA4244 50mV/div 50mV/div OPA2244 10µs/div 10µs/div OFFSET VOLTAGE PRODUCTION DISTRIBUTION 30 12 OPA4244 OPA244 25 1800 1500 1200 900 600 300 0 –1500 1500 1300 900 1100 700 500 300 –100 0 100 –300 –500 –700 0 –900 0 –1100 5 –1300 2 –300 10 –600 4 15 –900 6 20 –1200 Percent of Amplifiers (%) OPA2244 8 –1500 Percent of Amplifiers (%) 10 Offset Voltage (µV) Offset Voltage (µV) ® 9 OPA244, 2244, 4244 TYPICAL PERFORMANCE CURVES (Cont.) At TA = 25°C, VS = +15V, and RL = 20kΩ connected to Ground, unless otherwise noted. OFFSET VOLTAGE PRODUCTION DISTRIBUTION 70 OPA244 60 OPA2244 50 35 Percent of Amplifiers (%) Percent of Amplifiers (%) 30 25 20 15 10 40 30 20 5 10 0 0 0 1 2 3 4 5 6 7 8 9 10 0 VOS Drift (µV/°C) 0.5 1 1.5 2 2.5 3 3.5 VOS Drift (µV/°C) ® OPA244, 2244, 4244 OPA4244 10 4 4.5 5.0 5.5 APPLICATIONS INFORMATION This allows a designer to have the same assured performance at any supply voltage within this range. In addition, many key parameters are guaranteed over the specified temperature range, –40°C to +85°C. Most behavior remains unchanged throughout the full operating voltage range. Parameters which vary significantly with operating voltage or temperature are shown in typical performance curves. The OPA244 is unity-gain stable and suitable for a wide range of general purpose applications. Power supply pins should be bypassed with 0.01µF ceramic capacitors. OPERATING VOLTAGE The OPA244 can operate from single supply (+2.2V to +36V) or dual supplies (±1.1 to ±18V) with excellent performance. Unlike most op amps which are specified at only one supply voltage, the OPA244 is specified for real world applications; a single set of specifications applies throughout the +2.6V to +36V (±1.3 to ±18V) supply range. Useful information on solder pad design for printed circuit boards can be found in Burr-Brown's Application Bulletin AB-132B, “Solder Pad Recommendations for SurfaceMount Devices,” easily found at Burr-Brown's web site (http://www.burr-brown.com). RH 10Ω To Load IH R1 38.3kΩ R5 383kΩ High-Side Current Sense R3 38.3kΩ V+ –In A1 +In OPA244 V+ for A1, A2 R4 20kΩ + 2.2V to 36V (±1.1V to ±18V) R8 100kΩ Out VO = 10 • IH • RH V– R2 19.1kΩ R2 and R4 divide down the common-mode input to A1. V– for A1, A2 V+ –In A2 +In OPA244 V– R7 9.09kΩ R6 10kΩ RL 10Ω Out VO = 10 • IL • RL Low-Side Current Sense Common-mode range of A2 extends to V– for low-side sensing. Optional for IB Cancellation (R7 = R6 II R8) To Load IL NOTE: Low and high-side sensing circuits can be used independently. FIGURE 1. Low and High-Side Battery Current Sensing. ® 11 OPA244, 2244, 4244