AD8022ARM

Dual High Speed, Low Noise Op Amp AD8022 FEATURES Low power amplifiers provide low noise and low distortion, ideal for xDSL modem receiver Wide supply range: +5 V, ±2.5 V to ±12 V voltage supply Low power consumption: 4.0 mA/Amp Voltage feedback Ease of Use Lower total noise (insignificant input current noise contribution compared to current feedback amps) Low noise and distortion 2.5 nV/√Hz voltage noise @ 100 kHz 1.2 pA/√Hz current noise MTPR < −66 dBc (G = +7) SFDR 110 dB @ 200 kHz High speed 130 MHz bandwidth (−3 dB), G = +1 Settling time to 0.1%, 68 ns 50 V/μs slew rate High output swing: ±10.1 V on ±12 V supply Low offset voltage, 1.5 mV typical FUNCTIONAL BLOCK DIAGRAM OUT1 1 –IN1 2 +IN1 3 –VS 4 AD8022 – + – + 8 +VS 7 OUT2 6 –IN2 5 +IN2 01053-001 Figure 1. APPLICATIONS Receiver for ADSL, VDSL, HDSL, and proprietary xDSL systems Low noise instrumentation front end Ultrasound preamps Active filters 16-bit ADC buffers GENERAL DESCRIPTIONS The AD8022 consists of two low noise, high speed, voltage feedback amplifiers. Each amplifier consumes only 4.0 mA of quiescent current, yet has only 2.5 nV/√Hz of voltage noise. These dual amplifiers provide wideband, low distortion performance, with high output current optimized for stability when driving capacitive loads. Manufactured on ADI’s high voltage generation of XFCB bipolar process, the AD8022 operates on a wide range of supply voltages. The AD8022 is available in both an 8-lead MSOP and an 8-lead SOIC. Fast over voltage recovery and wide bandwidth make the AD8022 ideal as the receive channel front end to an ADSL, VDSL, or proprietary xDSL transceiver design. In an xDSL line interface circuit, the AD8022’s op amps can be configured as the differential receiver from the line transformer or as independent active filters. 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 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. 100 (pA/ Hz, nV/ Hz) 10 eN (nV/ Hz) 01053-002 iN (pA/ Hz) 1 10 100 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 2. Current and Voltage Noise vs. Frequency One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2005 Analog Devices, Inc. All rights reserved. AD8022 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 Maximum Power Dissipation ..................................................... 5 ESD Caution.................................................................................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 12 Applications..................................................................................... 13 DMT Modulation and Multitone Power Ratio (MTPR)....... 13 Channel Capacity and SNR....................................................... 13 Power Supply and Decoupling.................................................. 13 Layout Considerations............................................................... 15 Outline Dimensions ....................................................................... 16 Ordering Guide .......................................................................... 16 REVISION HISTORY 5/05—Rev. A to Rev. B Changes to Format .............................................................Universal Deleted Evaluation Boards Section.............................................. 14 Deleted Generating DMT Section................................................ 14 Changes to Ordering Guide.......................................................... 16 Updated Outline Dimensions....................................................... 16 9/02—Rev. 0 to Rev. A Changes to Features ..........................................................................1 Changes to Applications...................................................................1 Changes to Product Description .....................................................1 Changes to Functional Block Diagram ..........................................1 Changes to Figure 1...........................................................................1 Changes to Specifications Table......................................................2 Edits to TPCs 1, 2, 3, 6 ......................................................................5 New TPCs 7, 8....................................................................................6 Edits to TPCs 16, 17, 18....................................................................7 Edits to TPC 19 ..................................................................................8 Edits to TPC 28 ..................................................................................9 Edits to Figure 3...............................................................................11 Edits to Figure 6...............................................................................14 Updated Outline Dimensions........................................................16 Rev. B | Page 2 of 16 AD8022 SPECIFICATIONS At 25°C, VS = ±12 V, RL = 500 Ω, G = +1, TMIN = –40°C, TMAX = +85°C, unless otherwise noted. Table 1. Parameter DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth Bandwidth for 0.1 dB Flatness Large Signal Bandwidth 1 Slew Rate Rise and Fall Time Settling Time 0.1% Overdrive Recovery Time NOISE/DISTORTION PERFORMANCE Distortion Second Harmonic Third Harmonic Multitone Input Power Ratio 2 Conditions VOUT = 50 mV p-p VOUT = 50 mV p-p VOUT = 4 V p-p VOUT = 2 V p-p, G = +2 VOUT = 2 V p-p, G = +2 VOUT = 2 V p-p VOUT = 150% of max output voltage, G = +2 VOUT = 2 V p-p fC = 1 MHz fC = 1 MHz G = +7 differential 26 kHz to 132 kHz 144 kHz to 1.1 MHz f = 100 kHz f = 100 kHz Min 110 Typ 130 25 4 50 30 62 200 Max Unit MHz MHz MHz V/μs ns ns ns 40 −95 −100 −67.2 −66 2.5 1.2 −1.5 ±6 ±7.25 5.0 ±7.5 dBc dBc dBc dBc nV/√Hz pA/√Hz mV mV nA μA μA dB kΩ pF V dB V V mA mA pF ±13.0 5.5 6.1 +85 V mA/Amp mA/Amp dB °C Voltage Noise (RTI) Input Current Noise DC PERFORMANCE Input Offset Voltage Input Offset Current Input Bias Current TMIN to TMAX ±120 2.5 TMIN to TMAX Open-Loop Gain INPUT CHARACTERISTICS Input Resistance (Differential) Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage Swing Linear Output Current Short-Circuit Output Current Capacitive Load Drive POWER SUPPLY Operating Range Quiescent Current Power Supply Rejection Ratio OPERATING TEMPERATURE RANGE 1 2 72 20 0.7 −11.25 to +11.75 98 ±10.1 ±10.6 ±55 100 75 +4.5 4.0 TMIN to TMAX VS = ±5V to ±12 V −40 80 VCM = ±3 V RL = 500 Ω RL = 2 kΩ G = +1, RL = 150 Ω, dc error = 1% RS = 0 Ω,