Datasheet ADA4896-2, ADA4897-1, ADA4897-2 (Analog Devices)

1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers Data Sheet ADA4896-2 /ADA4897-1/ ADA4897-2 FEATURES FUNCTIONAL BLOCK DIAGRAM Low wideband noise NC 1 8 DISABLE 1 nV/√Hz –IN 2 7 +VS 2.8 pA/√Hz +IN 3 6 OUT Low 1/f noise: 2.4 nV/√Hz at 10 Hz
101
–VS 4 5 NC Low distortion: −115 dBc at 100 kHz, VOUT = 2 V p-p
09447-
Low power: 3 mA per amplifier
Figure 1. 8-Lead SOIC (ADA4897-1)
Low input offset voltage: 0.5 mV maximum High speed 8 VS = ±5V −3 dB bandwidth: 230 MHz (G = +1) 7 Slew rate: 120 V/μs Settling time to 0.1%: 45 ns ) 6 √Hz Rail-to-rail output V/ 5 Wide supply range: 3 V to 10 V E (n IS Disable feature (ADA4897-1/ ADA4897-2) O 4 E N APPLICATIONS G A 3 T L Low noise preamplifier VO 2 Ultrasound amplifiers PLL loop filters 1 High performance ADC drivers 0 DAC buffers 1 10 100 1k 10k 100k 1M 5M
102 47-
FREQUENCY (Hz)
094
GENERAL DESCRIPTION
Figure 2. Voltage Noise vs. Frequency The ADA4896-2/ADA4897-1/ADA4897-2 are unity-gain stable,
Table 1. Other Low Noise Amplifiers
low noise, rail-to-rail output, high speed voltage feedback amplifiers
VN (nV/√Hz) Supply
that have a quiescent current of 3 mA. With a 1/f noise of
Part No. At 1 kHz At 100 kHz BW (MHz) Voltage (V)
2.4 nV/√Hz at 10 Hz and a spurious-free dynamic range of −80 dBc AD797 0.9 0.9 8 10 to 30 at 2 MHz, the ADA4896-2/ADA4897-1/ADA4897-2 are ideal AD8021 5 2.1 490 5 to 24 solutions in a variety of applications, including ultrasound, low AD8099 3 0.95 510 5 to 12 noise preamplifiers, and drivers of high performance ADCs. The AD8045 6 3 1000 3.3 to 12 Analog Devices, Inc., proprietary next-generation SiGe bipolar ADA4899-1 1.4 1 600 5 to 12 process and innovative architecture enable such high performance ADA4898-1/ 0.9 0.9 65 10 to 32 amplifiers. ADA4898-2 The ADA4896-2/ADA4897-1/ADA4897-2 have 230 MHz bandwidth, 120 V/μs slew rate, and settle to 0.1% in 45 ns.
Table 2. Complementary ADCs
With a wide supply voltage range of 3 V to 10 V, the ADA4896-2/
Part No. Bits Speed (MSPS) Power (mW)
ADA4897-1/ADA4897-2 are ideal candidates for systems that AD7944 14 2.5 15.5 require high dynamic range, precision, low power, and high speed. AD7985 16 2.5 15.5 AD7986 18 2 15 The ADA4896-2 is available in 8-lead LFCSP and 8-lead MSOP packages. The ADA4897-1 is available in 8-lead SOIC and 6-lead SOT-23 packages. The ADA4897-2 is available in a 10-lead MSOP package. The ADA4896-2/ADA4897-1/ADA4897-2 operate over the extended industrial temperature range of −40°C to +125°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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. 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. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2012 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ±5 V SUPPLY +5 V SUPPLY +3 V SUPPLY ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION AMPLIFIER DESCRIPTION INPUT PROTECTION DISABLE OPERATION DC ERRORS BIAS CURRENT CANCELLATION NOISE CONSIDERATIONS CAPACITANCE DRIVE APPLICATIONS INFORMATION TYPICAL PERFORMANCE VALUES LOW NOISE, GAIN SELECTABLE AMPLIFIER MEDICAL ULTRASOUND APPLICATIONS Overview of the Ultrasound System ADA4896-2/ADA4897-1/ADA4897-2 in the Ultrasound System LAYOUT CONSIDERATIONS Ground Plane Power Supply Bypassing OUTLINE DIMENSIONS ORDERING GUIDE