OPA OPA 277 227 OPA277 OPA2277 OPA4277 OPA 4277 7 OPA2 277 OPA2 77 OPA4 277 OPA2 77 OPA2 277 SBOS079A – MARCH 1999 – REVISED APRIL 2005 High Precision OPERATIONAL AMPLIFIERS FEATURES DESCRIPTION ● ULTRA LOW OFFSET VOLTAGE: 10µV ● ULTRA LOW DRIFT: ±0.1µV/°C ● HIGH OPEN-LOOP GAIN: 134dB ● HIGH COMMON-MODE REJECTION: 140dB ● HIGH POWER SUPPLY REJECTION: 130dB ● LOW BIAS CURRENT: 1nA max ● WIDE SUPPLY RANGE: ±2V to ±18V ● LOW QUIESCENT CURRENT: 800µA/amplifier ● SINGLE, DUAL, AND QUAD VERSIONS ● REPLACES OP-07, OP-77, OP-177 The OPA277 series precision op amps replace the industry standard OP-177. They offer improved noise, wider output voltage swing, and are twice as fast with half the quiescent current. Features include ultra low offset voltage and drift, low bias current, high common-mode rejection, and high power supply rejection. Single, dual, and quad versions have identical specifications for maximum design flexibility. OPA277 series op amps operate from ±2V to ±18V supplies with excellent performance. Unlike most op amps which are specified at only one supply voltage, the OPA277 series is specified for real-world applications; a single limit applies over the ±5V to ±15V supply range. High performance is maintained as the amplifiers swing to their specified limits. Because the initial offset voltage (±20µV max) is so low, user adjustment is usually not required. However, the single version (OPA277) provides external trim pins for special applications. APPLICATIONS ● ● ● ● ● ● ● TRANSDUCER AMPLIFIER BRIDGE AMPLIFIER TEMPERATURE MEASUREMENTS STRAIN GAGE AMPLIFIER PRECISION INTEGRATOR BATTERY POWERED INSTRUMENTS TEST EQUIPMENT OPA277 op amps are easy to use and free from phase inversion and overload problems found in some other op amps. They are stable in unity gain and provide excellent dynamic behavior over a wide range of load conditions. Dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded. Single (OPA277) and dual (OPA2277) versions are available in DIP-8, SO-8, and DFN-8 (4mm x 4mm) packages. The quad (OPA4277) comes in DIP-14 and SO-14 surface-mount packages. All are fully specified from –40°C to +85°C and operate from –55°C to +125°C. OPA277 Offset Trim 1 8 Offset Trim –In 2 7 V+ +In 3 6 Output V– 4 5 NC 8-Pin DIP, SO-8 OPA277AIDRM Out A 1 14 Out D –In A 2 13 –In D +In A 3 12 +In D V+ 4 11 V– A Out A 1 –In A 2 +In A 3 V– 4 A B 8 V+ 7 Out B 6 –In B 5 +In B D +In B 5 10 +In C –In B 6 9 –In C Out B 7 8 Out C B OPA2277 Offset Trim OPA4277 1 Pin 1 Indicator 8 Offset Trim 7 V+ −In 2 +In 3 6 Output V− 4 5 NC OPA2277AIDRM Out A 1 8 Out B −In A 2 7 V+ +In A 3 6 −In B V− 4 5 +In B C Pin 1 Indicator DFN-8 4mm x 4mm (top view) Thermal Pad on Bottom (Connect to V−) 14-Pin DIP, SO-14 8-Pin DIP, SO-8 NC = No connection. DFN-8 4mm x 4mm (top view) Thermal Pad on Bottom (Connect to V−) Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. Copyright © 1999-2005, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. www.ti.com ABSOLUTE MAXIMUM RATINGS(1) ELECTROSTATIC DISCHARGE SENSITIVITY Supply Voltage .................................................................................... 36V Input Voltage ..................................................... (V–) –0.7V to (V+) +0.7V Output Short-Circuit(2) .............................................................. Continuous Operating Temperature .................................................. –55°C to +125°C Storage Temperature ..................................................... –55°C to +125°C Junction Temperature ...................................................................... 150°C Lead Temperature (soldering, 10s) ................................................. 300°C ESD Rating (Human Body Model) .................................................. 2000V (Machine Model) ........................................................... 100V This integrated circuit can be damaged by ESD. Texas Instruments 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. NOTE: (1) Stresses above these rating may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. (2) Short-circuit to ground, one amplifier per package. PACKAGE/ORDERING INFORMATION(1) OFFSET VOLTAGE max, µV OFFSET VOLTAGE DRIFT max, µV/°C PACKAGE-LEAD Single OPA277PA OPA277P OPA277UA OPA277U OPA277AIDRM ±50 ±20 ±50 ±20 ±100 ±1 ±0.15 ±1 ±0.15 ±1 DIP-8 DIP-8 SO-8 Surface Mount SO-8 Surface Mount DFN-8 (4mm x 4mm) Dual OPA2277PA OPA2277P OPA2277UA OPA2277U OPA2277AIDRM ±50 ±25 ±50 ±25 ±100 ±1 ±0.25 ±1 ±0.25 ±1 DIP-8 DIP-8 SO-8 Surface Mount SO-8 Surface Mount DFN-8 (4mm x 4mm) Quad OPA4277PA OPA4277UA ±50 ±50 ±1 ±1 DIP-14 SO-14 Surface Mount PRODUCT NOTE: (1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet or visit the TI web site at www.ti.com. PIN DESCRIPTIONS OPA277 OPA2277AIDRM Offset Trim 1 8 Offset Trim –In 2 7 V+ +In 3 6 Output V– 4 5 NC(1) Out A 1 Pin 1 Indicator 8 Out B 7 V+ −In A 2 +In A 3 6 −In B V− 4 5 +In B OPA4277 8-Pin DIP, SO-8 Out A 1 –In A 2 A 14 Out D 13 –In D DFN-8 4mm x 4mm (top view) D +In A 3 12 +In D V+ 4 11 V– +In B 5 10 +In C Thermal Pad on Bottom (Connect to V−) OPA277AIDRM B C –In B 6 9 –In C Out B 7 8 Out C OPA2277 Offset Trim 1 Pin 1 Indicator 8 Offset Trim 7 V+ −In 2 +In 3 6 Output V− 4 5 NC 14-Pin DIP, SO-14 Out A 1 –In A 2 +In A 3 V– 4 A B 8-Pin DIP, SO-8 2 8 V+ 7 Out B 6 –In B 5 +In B DFN-8 4mm x 4mm (top view) NOTE: (1) NC = No connection. Thermal Pad on Bottom (Connect to V−) OPA277, OPA2277, OPA4277 www.ti.com SBOS079A ELECTRICAL CHARACTERISTICS: VS = ±5V to VS = ±15V At TA = +25°C, and RL = 2kΩ, unless otherwise noted. Boldface limits apply over the specified temperature range, –40°C to +85°C. OPA277PA, UA OPA2277PA, UA OPA4277PA, UA OPA277P, U OPA2277P, U PARAMETER CONDITION OFFSET VOLTAGE Input Offset Voltage: OPA277P, U (high grade, single) OPA2277P, U (high grade, dual) All PA, UA, Versions AIDRM Versions VOS TYP(1) MAX ±10 ±10 ±20 ±25 TYP(1) MAX MIN TYP(1) Input Offset Voltage Drift dVOS/dT OPA277P, U (high grade, single) OPA2277P, U (high grade, dual) All PA, UA, AIDRM Versions TA = –40°C to +85°C TA = –40°C to +85°C TA = –40°C to +85°C PSRR INPUT BIAS CURRENT Input Bias Current TA = –40°C to +85°C Input Offset Current TA = –40°C to +85°C –40°C –40°C –40°C –40°C to to to to +85°C +85°C +85°C +85°C ±30 ±50 ±0.1 ±0.1 0.2 ±0.3 VS = ±2V to ±18V VS = ±2V to ±18V dc ±0.5 IOS ±0.5 Input Voltage Noise Density, f = 10Hz en f = 100Hz f = 1kHz f = 10kHz Current Noise Density, f = 1kHz in 0.22 0.035 12 8 8 8 0.2 NOISE Input Voltage Noise, f = 0.1 to 10Hz INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain AOL TA = –40°C to +85°C FREQUENCY RESPONSE Gain-Bandwidth Product GBW Slew Rate SR Settling Time, 0.1% 0.01% Overload Recovery Time Total Harmonic Distortion + Noise THD+N VCM = (V–) +2V to (V+) –2V VCM = (V–) +2V to (V+) –2V ±0.15 ✻ ✻ ±0.5 ±0.5 (V–) +2 130 128 ±1 ±0.15 ✻ ✻ ±1 ±1 ✻ 0.1 IB VCM CMRR ±100 ±0.15 ±0.25 ±1 ±2 ±1 ±2 ✻ ✻ (V+) –2 ✻ 115 115 ±2.8 ±4 ±2.8 ±4 ±100 µV µV µV µV ±165 µV µV µV µV ±1 µV/°C µV/°C µV/°C ±1 ±1 µV/mo µV/V µV/V µV/V ±2.8 ±4 ±2.8 ±4 nA nA nA nA µVPP µVrms nV/√Hz nV/√Hz nV/√Hz nV/√Hz pA/√Hz ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ UNITS ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ 140 MAX ±50 ±35 TA = TA = TA = TA = INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection TA = –40°C to +85°C MIN ±20 Input Offset Voltage Over Temperature OPA277P, U (high grade, single) OPA2277P, U (high grade, dual) All PA, UA, Versions AIDRM Versions Input Offset Voltage: (all models) vs Time vs Power Supply TA = –40°C to +85°C Channel Separation (dual, quad) MIN OPA277AIDRM, OPA2277AIDRM ✻ 115 115 ✻ ✻ V dB dB VCM = (V–) +2V to (V+) –2V 100 || 3 250 || 3 ✻ ✻ ✻ ✻ MΩ || pF GΩ || pF VO = (V–)+0.5V to (V+)–1.2V, RL = 10kΩ 140 ✻ ✻ dB ✻ dB VO = (V–)+1.5V to (V+)–1.5V, RL = 2kΩ 126 VO = (V–)+1.5V to (V+)–1.5V, RL = 2kΩ 126 VS = ±15V, G = 1, 10V Step VS = ±15V, G = 1, 10V Step VIN • G = VS 1kHz, G = 1, VO = 3.5Vrms 134 ✻ ✻ ✻ 1 0.8 14 16 3 0.002 ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ dB ✻ ✻ ✻ ✻ ✻ ✻ MHz V/µs µs µs µs % ✻ Specifications same as OPA277P, U. NOTE: (1) VS = ±15V. OPA277, OPA2277, OPA4277 SBOS079A www.ti.com 3 ELECTRICAL CHARACTERISTICS: VS = ±5V to VS = ±15V (CONT) At TA = +25°C, and RL = 2kΩ, unless otherwise noted. Boldface limits apply over the specified temperature range, –40°C to +85°C. OPA277PA, UA OPA2277PA, UA OPA4277PA, UA OPA277P, U OPA2277P, U PARAMETER CONDITION OUTPUT Voltage Output TA = –40°C to +85°C TA = –40°C to +85°C Short-Circuit Current Capacitive Load Drive VO (V–) (V–) (V–) (V–) +0.5 +0.5 +1.5 +1.5 IQ (V+) (V+) (V+) (V+) ±5 ±2 VS MAX –1.2 –1.2 –1.5 –1.5 MIN ±790 IO = 0 IO = 0 –40 –55 –55 TYP(1) ✻ ✻ ✻ ✻ ±35 See Typical Curve ISC CLOAD POWER SUPPLY Specified Voltage Range Operating Voltage Range Quiescent Current (per amplifier) TA = –40°C to +85°C TEMPERATURE RANGE Specified Range Operating Range Storage Range Thermal Resistance SO-8 Surface-Mount DIP-8 DIP-14 SO-14 Surface-Mount DFN-8(2) RL = 10kΩ RL = 10kΩ RL = 2kΩ RL = 2kΩ TYP(1) MIN OPA277AIDRM, OPA2277AIDRM MAX MIN ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ±15 ±18 ±825 ±900 ✻ ✻ +85 +125 +125 ✻ ✻ ✻ ✻ TYP(1) UNITS ✻ ✻ ✻ ✻ V V V V mA ✻ ✻ ✻ ✻ V V µA µA ✻ ✻ ✻ °C °C °C ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ θJA 150 100 80 100 MAX ✻ ✻ ✻ ✻ 45 °C/W °C/W °C/W °C/W °C/W ✻ Specifications same as OPA277P, U. NOTES: (1) VS = ±15V. (2) Thermal pad soldered to printed circuit board (PCB). 4 OPA277, OPA2277, OPA4277 www.ti.com SBOS079A TYPICAL CHARACTERISTICS At TA = +25°C, VS = ±15V, and RL = 2kΩ, unless otherwise noted. POWER SUPPLY AND COMMON-MODE REJECTION vs FREQUENCY OPEN-LOOP GAIN/PHASE vs FREQUENCY 140 140 0 100 –30 80 –60 φ 60 –90 40 –120 20 –150 0 –180 120 +PSR –PSR PSR, CMR (dB) AOL (dB) 120 CL = 0 CL = 1500pF Phase (°) G 100 80 CMR 60 40 20 0 –20 0.1 1 10 100 1k 10k 100k 1M 0.1 10M 1 10 100 1k 10k Frequency (Hz) Frequency (Hz) INPUT NOISE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY INPUT NOISE VOLTAGE vs TIME 100k 1M Noise signal is bandwidth limited to lie between 0.1Hz and 10Hz. Current Noise 100 50nV/div Voltage Noise (nV/√Hz) Current Noise (fA/√Hz) 1000 Voltage Noise 10 1 1 10 100 1k 10k 1s/div Frequency (Hz) TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY CHANNEL SEPARATION vs FREQUENCY 140 1 120 THD+Noise (%) Channel Separation (dB) VOUT = 3.5Vrms 100 Dual and quad devices. G = 1, all channels. Quad measured channel A to D or B to C—other combinations yield similar or improved rejection. 80 60 0.1 G = 10, RL = 2kΩ, 10kΩ 0.01 G = 1, RL = 2kΩ, 10kΩ 0.001 40 10 100 1k 10k 100k 1M 10 Frequency (Hz) 1k 10k 100k Frequency (Hz) OPA277, OPA2277, OPA4277 SBOS079A 100 www.ti.com 5 TYPICAL CHARACTERISTICS (CONT) At TA = +25°C, VS = ±15V, and RL = 2kΩ, unless otherwise noted. OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION OFFSET VOLTAGE PRODUCTION DISTRIBUTION 16 12 Typical distribution of packaged units. Single, dual, and quad included. 30 Percent of Amplifiers (%) 10 8 6 4 25 20 15 10 5 2 0 0 –50–45–40–35–30–25–20–15–10 –5 0 5 10 15 20 25 30 35 40 45 50 Offset Voltage (µV) 0 0.1 160 2 150 AOL, CMR, PSR (dB) Offset Voltage Change (µV) 0.4 0.5 0.6 0.7 0.8 0.9 1.0 AOL, CMR, PSR vs TEMPERATURE 3 1 0 –1 –2 CMR 140 AOL 130 PSR 120 110 –3 0 15 30 45 60 75 90 105 100 –75 120 –50 –25 0 25 50 75 100 Time from Power Supply Turn-On (s) Temperature (°C) INPUT BIAS CURRENT vs TEMPERATURE QUIESCENT CURRENT AND SHORT-CIRCUIT CURRENT vs TEMPERATURE 125 5 1000 100 4 950 90 3 900 80 Quiescent Current (µA) Input Bias Current (nA) 0.3 Offset Voltage (µV/°C) WARM-UP OFFSET VOLTAGE DRIFT 2 1 0 –1 –2 Curves represent typical production units. 70 850 ±IQ 800 60 50 750 –ISC 700 40 +ISC 650 30 600 20 –4 550 10 –5 500 –75 –3 –75 –50 –25 0 25 50 75 100 125 Temperature (°C) 6 0.2 Short-Circuit Current (mA) Percent of Amplifiers (%) 35 Typical distribution of packaged units. Single, dual, and quad included. 14 0 –50 –25 0 25 50 75 100 125 Temperature (°C) OPA277, OPA2277, OPA4277 www.ti.com SBOS079A TYPICAL CHARACTERISTICS (CONT) At TA = +25°C, VS = ±15V, and RL = 2kΩ, unless otherwise noted. CHANGE IN INPUT BIAS CURRENT vs POWER SUPPLY VOLTAGE CHANGE IN INPUT BIAS CURRENT vs COMMON-MODE VOLTAGE 2.0 2.0 Curve shows normalized change in bias current with respect to VS = ±10V (+20V). Typical IB may range from –0.5nA to +0.5nA at VS = ±10V. 1.5 1.0 1.0 VS = ±5V ∆IB (nA) ∆IB (nA) 0.5 0.0 Curve shows normalized change in bias current with respect to VCM = 0V. Typical IB may range from –05.nA to +0.5nA at VCM = 0V. 1.5 VCM = 0V 0.5 0.0 –0.5 –0.5 –1.0 –1.0 –1.5 –1.5 VS = ±15V –2.0 –2.0 0 5 10 15 20 25 30 35 40 –15 –10 Supply Voltage (V) QUIESCENT CURRENT vs SUPPLY VOLTAGE 5 10 15 100 10V step CL = 1500pF per amplifier Settling Time (µs) 900 800 700 50 0.01% 0.1% 20 600 10 500 0 ±5 ±10 ±15 ±20 ±1 ±10 Supply Voltage (V) ±100 Gain (V/V) MAXIMUM OUTPUT VOLTAGE vs FREQUENCY OUTPUT VOLTAGE SWING vs OUTPUT CURRENT (V+) 30 (V+) – 1 Output Voltage Swing (V) VS = ±15V 25 Output Voltage (VPP) 0 SETTLING TIME vs CLOSED-LOOP GAIN 1000 Quiescent Current (µA) –5 Common-Mode Voltage (V) 20 15 10 VS = ±5V 5 –55°C (V+) – 2 (V+) – 3 125°C (V+) – 4 25°C (V+) – 5 (V–) + 5 25°C 125°C (V–) + 4 (V–) + 3 (V–) + 2 –55°C (V–) + 1 (V–) 0 1k 10k 100k 0 1M OPA277, OPA2277, OPA4277 SBOS079A ±5 ±10 ±15 ±20 ±25 ±30 Output Current (mA) Frequency (Hz) www.ti.com 7 TYPICAL CHARACTERISTICS (CONT) At TA = +25°C, VS = ±15V, and RL = 2kΩ, unless otherwise noted. SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE LARGE-SIGNAL STEP RESPONSE G = +1, CL = 1500pF, VS = +15V 60 Gain = –1 40 Gain = +1 2V/div Overshoot (%) 50 30 20 Gain = ±10 10 0 10 100 1k 10k 100k 10µs/div Load Capacitance (pF) 20mV/div SMALL-SIGNAL STEP RESPONSE G = +1, CL = 1500pF, VS = ±15V 20mV/div SMALL-SIGNAL STEP RESPONSE G = +1, CL = 0, VS = ±15V 1µs/div 8 1µs/div OPA277, OPA2277, OPA4277 www.ti.com SBOS079A APPLICATIONS INFORMATION The OPA277 series is unity-gain stable and free from unexpected output phase reversal, making it easy to use in a wide range of applications. Applications with noisy or high impedance power supplies may require decoupling capacitors close to the device pins. In most cases 0.1µF capacitors are adequate. connecting a potentiometer as shown in Figure 1. This adjustment should be used only to null the offset of the op amp. This adjustment should not be used to compensate for offsets created elsewhere in a system since this can introduce additional temperature drift. V+ Trim Range: Exceeds Offset Voltage Specification The OPA277 series has very low offset voltage and drift. To achieve highest performance, circuit layout and mechanical conditions should be optimized. Offset voltage and drift can be degraded by small thermoelectric potentials at the op amp inputs. Connections of dissimilar metals will generate thermal potential which can degrade the ultimate performance of the OPA277 series. These thermal potentials can be made to cancel by assuring that they are equal in both input terminals. • Keep thermal mass of the connections made to the two input terminals similar. • Locate heat sources as far as possible from the critical input circuitry. • Shield op amp and input circuitry from air currents such as cooling fans. OPERATING VOLTAGE OPA277 series op amp operate from ±2V to ±18V supplies with excellent performance. Unlike most op amps which are specified at only one supply voltage, the OPA277 series is specified for real-world applications; a single limit applies over the ±5V to ±15V supply range. This allows a customer operating at VS = ±10V to have the same assured performance as a customer using ±15V supplies. In addition, key parameters are assured over the specified temperature range, –40°C to +85°C. Most behavior remains unchanged through the full operating voltage range (±2V to ±18V). Parameters which vary significantly with operating voltage or temperature are shown in typical performance curves. OFFSET VOLTAGE ADJUSTMENT The OPA277 series is laser-trimmed for very low offset voltage and drift so most circuits will not require external adjustment. However, offset voltage trim connections are provided on pins 1 and 8. Offset voltage can be adjusted by 0.1µF 20kΩ 7 1 2 8 3 0.1µF OPA277 4 6 OPA277 single op amp only. Use offset adjust pins only to null offset voltage of op amp—see text. V– FIGURE 1. OPA277 Offset Voltage Trim Circuit. INPUT PROTECTION The inputs of the OPA277 series are protected with 1kΩ series input resistors and diode clamps. The inputs can withstand ±30V differential inputs without damage. The protection diodes will, of course, conduct current when the inputs are over-driven. This may disturb the slewing behavior of unity-gain follower applications, but will not damage the op amp. INPUT BIAS CURRENT CANCELLATION The input stage base current of the OPA277 series is internally compensated with an equal and opposite cancellation circuit. The resulting input bias current is the difference between the input stage base current and the cancellation current. This residual input bias current can be positive or negative. When the bias current is canceled in this manner, the input bias current and input offset current are approximately the same magnitude. As a result, it is not necessary to use a bias current cancellation resistor as is often done with other op amps (Figure 2). A resistor added to cancel input bias current errors may actually increase offset voltage and noise. R2 R2 R1 R1 Op Amp OPA277 RB = R2 || R1 No bias current cancellation resistor (see text) (a) (b) Conventional op amp with external bias current cancellation resistor. OPA277 with no external bias current cancellation resistor. FIGURE 2. Input Bias Current Cancellation. OPA277, OPA2277, OPA4277 SBOS079A www.ti.com 9 V+ 1/2 OPA2277 VOUT = (V1 – V2)(1 + R2 R1 ) R2 V– R–∆R Load Cell V1 R+∆R V+ R+∆R V2 R1 1/2 OPA2277 R–∆R V– R2 R1 For integrated solution see: INA126, INA2126 (dual) INA125 (on-board reference) INA122 (single-supply) FIGURE 3. Load Cell Amplifier. IREG ∼ 1mA 5V 12 V+ Type J VLIN 1/2 OPA2277 13 RF 10kΩ 4 R 412Ω + VIN 1 IR1 3 11 VREG 10 V+ RG RG 1250Ω RF 10kΩ 14 IR2 XTR105 B E RG 9 8 IO 1/2 OPA2277 1kΩ 2 25Ω 7 IRET V– 50Ω – VIN 6 + – IO = 4mA + (VIN – VIN) 40 RG RCM = 1250Ω (G = 1 + 2RF = 50) R 0.01µF FIGURE 4. Thermocouple Low Offset, Low Drift Loop Measurement with Diode Cold Junction Compensation. 10 OPA277, OPA2277, OPA4277 www.ti.com SBOS079A DFN PACKAGE LAYOUT GUIDELINES The OPA277 series uses the 8-lead DFN (also known as SON), which is a QFN package with contacts on only two sides of the package bottom. This leadless, near-chip-scale package maximizes board space and enhances thermal and electrical characteristics through an exposed pad. The leadframe die pad should be soldered to a thermal pad on the PCB. Mechanical drawings located at the end of this data sheet list the physical dimensions for the package and pad. DFN packages are physically small, have a smaller routing area, improved thermal performance, and improved electrical parasitics, with a pinout scheme that is consistent with other commonly-used packages, such as SO and MSOP. Additionally, the absence of external leads eliminates bent-lead issues. Soldering the exposed pad significantly improves board-level reliability during temperature cycling, key push, package shear, and similar board-level tests. Even with applications that have low-power dissipation, the exposed pad must be soldered to the PCB to provide structural integrity and longterm reliability. The DFN package can be easily mounted using standard printed circuit board (PCB) assembly techniques. See Application Note, QFN/SON PCB Attachment (SLUA271) and Application Report, Quad Flatpack No-Lead Logic Packages (SCBA017), both available for download at www.ti.com. The exposed leadframe die pad on the bottom of the package should be connected to V–. OPA277, OPA2277, OPA4277 SBOS079A www.ti.com 11 PACKAGE OPTION ADDENDUM www.ti.com 28-Jun-2007 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty Lead/Ball Finish MSL Peak Temp (3) OPA2277AIDRMR PREVIEW SON DRM 8 3000 TBD Call TI Call TI OPA2277AIDRMRG4 ACTIVE SON DRM 8 3000 TBD Call TI Call TI OPA2277AIDRMT ACTIVE SON DRM 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM OPA2277AIDRMTG4 ACTIVE SON DRM 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM OPA2277P ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA2277PA ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA2277PAG4 ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA2277PG4 ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA2277U ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA2277U/2K5 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA2277U/2K5G4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA2277UA ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA2277UA/2K5 ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR OPA2277UA/2K5E4 ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR OPA2277UAE4 ACTIVE SOIC D 8 100 TBD Call TI OPA2277UAG4 ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA2277UG4 ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA277AIDRMR ACTIVE SON DRM 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM OPA277AIDRMRG4 ACTIVE SON DRM 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM OPA277AIDRMT ACTIVE SON DRM 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM OPA277AIDRMTG4 ACTIVE SON DRM 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM OPA277P ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA277PA ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA277PAG4 ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA277PG4 ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA277U ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR Addendum-Page 1 Call TI PACKAGE OPTION ADDENDUM www.ti.com 28-Jun-2007 Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty OPA277U/2K5 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA277U/2K5G4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA277UA ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA277UA/2K5 ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR OPA277UA/2K5E4 ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR OPA277UAE4 ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA277UAG4 ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA277UG4 ACTIVE SOIC D 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA4277PA ACTIVE PDIP N 14 25 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA4277PAG4 ACTIVE PDIP N 14 25 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA4277UA ACTIVE SOIC D 14 58 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA4277UA/2K5 ACTIVE SOIC D 14 2500 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR OPA4277UA/2K5E4 ACTIVE SOIC D 14 2500 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR OPA4277UAE4 ACTIVE SOIC D 14 58 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR OPA4277UAG4 ACTIVE SOIC D 14 58 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is Addendum-Page 2 PACKAGE OPTION ADDENDUM www.ti.com 28-Jun-2007 provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 3 PACKAGE MATERIALS INFORMATION www.ti.com 2-Jul-2007 TAPE AND REEL INFORMATION Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com Device 2-Jul-2007 Package Pins Site Reel Diameter (mm) Reel Width (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant OPA2277AIDRMT DRM 8 MLA 180 12 4.3 4.3 1.5 8 12 Q2 OPA2277UA/2K5 D 8 MLA 330 12 6.9 5.4 2.0 8 12 Q1 OPA277AIDRMR DRM 8 MLA 330 12 4.3 4.3 1.5 8 12 Q2 OPA277AIDRMT DRM 8 MLA 180 12 4.3 4.3 1.5 8 12 Q2 OPA277UA/2K5 D 8 MLA 330 12 6.9 5.4 2.0 8 12 Q1 OPA4277UA/2K5 D 14 MLA 330 16 6.5 9.5 2.1 8 16 Q1 TAPE AND REEL BOX INFORMATION Device Package Pins Site Length (mm) Width (mm) Height (mm) OPA2277AIDRMT DRM 8 MLA 190.0 212.7 31.75 OPA2277UA/2K5 D 8 MLA 346.0 346.0 29.0 OPA277AIDRMR DRM 8 MLA 346.0 346.0 29.0 OPA277AIDRMT DRM 8 MLA 190.0 212.7 31.75 OPA277UA/2K5 D 8 MLA 390.0 348.0 63.0 OPA4277UA/2K5 D 14 MLA 346.0 346.0 33.0 Pack Materials-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 2-Jul-2007 Pack Materials-Page 3 MECHANICAL DATA MPDI001A – JANUARY 1995 – REVISED JUNE 1999 P (R-PDIP-T8) PLASTIC DUAL-IN-LINE 0.400 (10,60) 0.355 (9,02) 8 5 0.260 (6,60) 0.240 (6,10) 1 4 0.070 (1,78) MAX 0.325 (8,26) 0.300 (7,62) 0.020 (0,51) MIN 0.015 (0,38) Gage Plane 0.200 (5,08) MAX Seating Plane 0.010 (0,25) NOM 0.125 (3,18) MIN 0.100 (2,54) 0.021 (0,53) 0.015 (0,38) 0.430 (10,92) MAX 0.010 (0,25) M 4040082/D 05/98 NOTES: A. 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