Datasheet AD648 (Analog Devices)

a
Dual Precision, Low Power BiFET Op Amp AD648 FEATURES CONNECTION DIAGRAM DC Performance 400
␮
A max Quiescent Current Plastic Mini-Dip (N) Package, 10 pA max Bias Current, Warmed Up (AD648B) Plastic SOIC (R) Package 1
␮
V max Offset Voltage (AD648B) and 10
␮
V/
ⴗ
C max Drift (AD648B) CERDIP (Q) Package 2
␮
V p-p Noise, 0.1 Hz to 10 Hz AC Performance 1.8 V/
␮
s Slew Rate 1 MHz Unity Gain Bandwidth Available in Plastic Mini-DIP, CERDIP, and Plastic SOIC Packages MIL-STD-883B Parts Available Surface Mount (SOIC) Package Available in Tape and Reel in Accordance with EIA-481A Standard Single Version: AD548 PRODUCT DESCRIPTION
–55°C to +125°C and the AD648T* grade is available pro- The AD648 is a matched pair of low power, precision mono- cessed to MIL-STD-883B, Rev. C. lithic operational amplifiers. It offers both low bias current The AD648 is available in an 8-lead plastic mini-DIP, (10 pA max, warmed up) and low quiescent current (400 µA CERDIP, and SOIC. max) and is fabricated with ion-implanted FET and laser wafer trimming technologies. Input bias current is guaranteed over the *Not for new design, obsolete April 2002. AD648’s entire common-mode voltage range.
PRODUCT HIGHLIGHTS
The economical J grade has a maximum guaranteed offset 1. A combination of low supply current, excellent dc and ac voltage of less than 2 mV and an offset voltage drift of less than performance and low drift makes the AD648 the ideal op 20 µV/°C. This level of dc precision is achieved using Analog’s amp for high performance, low power applications. laser wafer drift trimming process. The combination of low quiescent current and low offset voltage drift minimizes changes 2. The AD648 is pin compatible with industry standard dual in input offset voltage due to self-heating effects. Five grades are op amps such as the LF442, TL062, and AD642, enabling offered over the commercial, industrial and military temperature designers to improve performance while achieving a reduc- ranges. tion in power dissipation of up to 85%. The AD648 is recommended for any dual supply op amp 3. Guaranteed low input offset voltage (2 mV max) and drift application requiring low power and excellent dc and ac per- (20 µV/°C max) for the AD648J are achieved using Analog formance. In applications such as battery-powered, precision Devices’ laser drift trimming technology. instrument front ends and CMOS DAC buffers, the AD648’s 4. Analog Devices specifies each device in the warmed-up excellent combination of low input offset voltage and drift, low condition, insuring that the device will meet its published bias current, and low 1/f noise reduces output errors. High specifications in actual use. common-mode rejection (82 dB, min on the “B” grade) and 5. Matching characteristics are excellent for all grades. The high open-loop gain ensures better than 12-bit linearity in high input offset voltage matching between amplifiers in the impedance, buffer applications. AD648J is within 2 mV. The AD648 is pinned out in a standard dual op amp configura- 6. Crosstalk between amplifiers is less than –120 dB at 1 kHz. tion and is available in seven performance grades. The AD648J and AD648K are rated over the commercial temperature range of 0°C to 70°C. The AD648 and AD648B are rated over the industrial temperature range of –40°C to +85°C. The AD648S and AD648T are rated over the military temperature range of REV. E 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
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
may result from its use. No license is granted by implication or otherwise
Tel: 781/329-4700 www.analog.com
under any patent or patent rights of Analog Devices.
Fax: 781/326-8703 © Analog Devices, Inc., 2002