Dual Precision, 500 ns a Settling, BiFET Op Amp AD746 CONNECTION DIAGRAM FEATURES AC PERFORMANCE Plastic Mini-DIP (N) 500 ns Settling to 0.01% for 10 V Step Cerdip (Q) and 75 V/ms Slew Rate Plastic SOIC (R) Packages 0.0001% Total Harmonic Distortion (THD) 13 MHz Gain Bandwidth Internal Compensation for Gains of +2 or Greater DC PERFORMANCE 0.5 mV max Offset Voltage (AD746B) 10 mV/8C max Drift (AD746B) 175 V/mV min Open Loop Gain (AD746B) 2 mV p-p Noise, 0.1 Hz to 10 Hz Available in Plastic Mini-DIP, Cerdip and Surface Mount Packages Available in Tape and Reel in Accordance with EIA-481A Standard MIL-STD-883B Processing also Available Single Version: AD744 APPLICATIONS Dual Output Buffers for 12- and 14-Bit DACs The AD746 is available in three 8-pin packages: plastic mini Input Buffers for Precision ADCs, Wideband DIP, hermetic cerdip and surface mount (SOIC). Preamplifiers and Low Distortion Audio Circuitry PRODUCT HIGHLIGHTS 1. The AD746 offers exceptional dynamic response for high PRODUCT DESCRIPTION speed data acquisition systems. It settles to 0.01% in 500 ns The AD746 is a dual operational amplifier, consisting of two and has a 100% tested minimum slew rate of 50 V/s AD744 BiFET op amps on a single chip. These precision (AD746B). monolithic op amps offer excellent dc characteristics plus rapid settling times, high slew rates and ample bandwidths. In 2. Outstanding dc precision is provided by a combination of addition, the AD746 provides the close matching ac and dc Analog Devices advanced processing technology, laser wafer characteristics inherent to amplifiers sharing the same drift trimming and well-matched ion-implanted JFETs. Input monolithic die. offset voltage, input bias current and input offset current are specified in the warmed-up condition and are 100% tested. The single pole response of the AD746 provides fast settling: 500 ns to 0.01%. This feature, combined with its high dc 3. Differential and multichannel systems will benefit from the precision, makes it suitable for use as a buffer amplifier for 12- AD746s very close matching of ac characteristics. Input or 14-bit DACs and ADCs. Furthermore, the AD746s low total offset voltage specs are fully tested and guaranteed to a harmonic distortion (THD) level of 0.0001% and very close maximum of 0.5 mV (AD746B). matching ac characteristics make it an ideal amplifier for many 4. The AD746 has very close, guaranteed matching of input demanding audio applications. bias current between its two amplifiers. The AD746 is internally compensated for stable operation as a 5. Unity gain stable version AD712 also available. unity gain inverter or as a noninverting amplifier with a gain of 2 or greater. It is available in four performance grades. The AD746J is rated over the commercial temperature range of 0 to +70C. The AD746A and AD746B are rated over the industrial temperature range of 40C to +85C. The AD746S is rated over the military temperature range of 55C to +125C and is available processed to MIL-STD-883B, Rev. C. REV. B 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700 Fax: 617/326-8703AD746SPECIFICATIONS ( +258C and 615 V dc, unless otherwise noted) AD746J/A AD746B AD746S Model Conditions Min Typ Max Min Typ Max Min Typ Max Units 1 INPUT OFFSET VOLTAGE Initial Offset 0.3 1.5 0.25 0.5 0.3 1.0 mV Offset T to T 2.0 0.7 1.5 mV MIN MAX vs. Temperature 12 20 5 10 12 20 V/C 2 vs. Supply (PSRR) 80 95 84 100 80 95 dB vs. Supply (PSRR) T to T 80 84 80 dB MIN MAX Long Term Stability 15 15 15 V/month 3 INPUT BIAS CURRENT Either Input V = 0 V 110 250 110 150 110 250 pA CM Either Input T V = 0 V 2.5/7 5.7/16 7 9.6 113 256 nA MAX CM Either Input V = +10 V 145 350 145 200 145 350 pA CM Offset Current V = 0 V 45 125 45 75 45 125 pA CM Offset Current T V = 0 V 1.0/3 2.8/8 3 4.8 45 128 nA MAX CM MATCHING CHARACTERISTICS Input Offset Voltage 0.6 1.5 0.3 0.5 0.6 1.0 mV Input Offset Voltage T to T 2.0 0.7 1.5 mV MIN MAX Input Offset Voltage Drift 20 20 20 V/C Input Bias Current 125 75 125 pA Crosstalk 1 kHz 120 120 120 dB 100 kHz 90 90 90 dB FREQUENCY RESPONSE Gain BW, Small Signal G = 1 8 13 9 13 8 13 MHz Slew Rate, Unity Gain G = 1 45 75 50 75 45 75 V/s Full Power Response V = 20 V p-p 600 600 600 kHz O 4 Settling Time to 0.01% G = 1 0.5 0.75 0.5 0.75 0.5 0.75 s Total Harmonic f = 1 kHz Distortion R1 2 k V = 3 V rms 0.0001 0.0001 0.0001 % O INPUT IMPEDANCE 1l 1l 1l Differential 2.5 l0 i5.5 2.5 l0 i5.5 2.5 l0 i5.5 ipF 1l 1l 1l Common Mode 2.5 l0 i5.5 2.5 l0 i5.5 2.5 l0 i5.5 ipF INPUT VOLTAGE RANGE 5 Differential 20 20 20 V Common-Mode Voltage +14.5, 11.5 +14.5, 11.5 +14.5, 11.5 V 6 Over Max Operating Range 11 +13 11 +13 11 +13 V Common-Mode Rejection Ratio V = 10 V 78 88 82 88 78 88 dB CM T to T 76 84 80 84 76 84 dB MIN MAX V = 11 V 72 84 78 84 72 84 dB CM T to T 70 80 74 80 70 80 dB MIN MAX INPUT VOLTAGE NOISE 0.1 to 10 Hz 2 2 2 V p-p Hz f = 10 Hz 45 45 45 nV/ f = 100 Hz 22 22 22 nV/Hz f = 1 kHz 18 18 18 nV/Hz f = 10 kHz 16 16 16 nV/Hz INPUT CURRENT NOISE f = 1 kHz 0.01 0.01 0.01 pA/Hz OPEN LOOP GAIN V = 10 V O R1 2 k 150 300 175 300 150 300 V/mV T to T 75 200 75 200 65 175 V/mV MIN MAX OUTPUT CHARACTERISTICS Voltage R1 2 k +13, 12.5 +13.9, 13.3 +13, 12.5 +13.9, 13.3 +13, 12.5 +13.9, 13.3 V T to T 12 +13.8, 13.1 612 +13.8, 13.1 612 +13.8, 13.1 V MIN MAX Current Short Circuit 25 25 25 mA Max Capacitive Load Gain = 1 50 50 50 pF Driving Capability Gain = 10 500 500 500 pF POWER SUPPLY Rated Performance 15 15 15 V Operating Range 64.5 618 64.5 618 64.5 618 V Quiescent Current 7 10 7 8.0 7 10 mA TEMPERATURE RANGE Rated Performance 0 to +70/40 to +85 40 to +85 55 to +125 C PACKAGE OPTIONS 8-Pin Plastic Mini-DIP (N-8) AD746JN 8-Pin Cerdip (Q-8) AD746AQ AD746BQ AD746SQ 8-Pin Surface Mount (R-8) AD746JR Tape and Reel AD746JR-REEL Chips AD746SCHIPS TRANSISTOR COUNT 54 54 54 2 REV. B