Datasheet ADA4895-1, ADA4895-2 (Analog Devices)

Low Power, 1 nV/√Hz, G ≥ 10 Stable, Rail- to-Rail Output Amplifier Data Sheet ADA4895-1/ ADA4895-2 FEATURES FUNCTIONAL BLOCK DIAGRAMS Low wideband noise NC 1 8 DISABLE 1 nV/√Hz –IN 2 7 +VS 1.6 pA/√Hz +IN 3 6 OUT Low 1/f noise: 2 nV/√Hz at 10 Hz –VS 4 5 NC ADA4895-1 Low distortion (SFDR): −96 dBc at 100 kHz, V
102
OUT = 2 V p-p NC = NO CONNECT. DO NOT Low power: 3 mA per amplifier CONNECT TO THIS PIN.
10186-
Low input offset voltage: 350 µV maximum
Figure 1. ADA4895-1 Single Amplifier (8-Lead SOIC)
High speed OUT1 1 10 +VS 236 MHz, −3 dB bandwidth (G = +10) –IN1 2 9 OUT2 943 V/µs slew rate +IN1 3 8 –IN2 22 ns settling time to 0.1% –VS 4 7 +IN2
001
Rail-to-rail output DISABLE1 5 ADA4895-2 6 DISABLE2
10186-
Wide supply range: 3 V to 10 V
Figure 2. ADA4895-2 Dual Amplifier (10-Lead MSOP)
Disable feature 5 30 APPLICATIONS ) ) Low noise preamplifier 4 24 √Hz √Hz Ultrasound amplifiers V/ A/ p ( PLL loop filters E ISE (n 3 18 IS High performance analog-to-digital converter (ADC) drivers O NO E N Digital-to-analog converter (DAC) buffers G NT A LT 2 12 O V CURRE GENERAL DESCRIPTION UT UT VOLTAGE 1 6
The ADA4895-1 (single) and ADA4895-2 (dual) are high speed
INP INP
voltage feedback amplifiers that are gain ≥ 10 stable with low
CURRENT
input noise, rail-to-rail output, and a quiescent current of 3 mA per
0 0 1 10 100 1k 10k 100k 1M
002 amplifier. With a 1/f noise of 2 nV/√Hz at 10 Hz and a spurious-
FREQUENCY (Hz)
10186- free dynamic range (SFDR) of −72 dBc at 2 MHz, the ADA4895-1/ Figure 3. Input Voltage and Current Noise vs. Frequency ADA4895-2 are an ideal solution in a variety of applications, including ultrasound, low noise preamplifiers, and drivers of
Table 1. Other Low Noise Amplifiers1
high performance ADCs. The Analog Devices, Inc., proprietary
ven at 100 kHz Bandwidth Supply
next generation SiGe bipolar process and innovative architecture
Part Number(s) (nV/√Hz) (MHz) Voltage (V)
enables the high performance of these amplifiers. AD8021 2.1 490 5 to 24 AD8045 3 1000 3.3 to 12 The ADA4895-1/ADA4895-2 have a smal signal bandwidth of AD8099 0.95 510 5 to 12 236 MHz at a gain of +10 with a slew rate of 943 V/µs, and settle ADA4841-1/ADA4841-2 2.1 80 2.7 to 12 to 0.1% in 22 ns. The wide supply voltage range (3 V to 10 V) ADA4896-2 1 230 3 to 10 of the ADA4895-1/ADA4895-2 make these amplifiers ideal ADA4897-1/ADA4897-2 1 230 3 to 10 candidates for systems that require large dynamic range, high ADA4898-1/ADA4898-2 0.9 65 10 to 32 gain, precision, and high speed. ADA4899-1 1 600 5 to 12 The ADA4895-1 is available in 8-lead SOIC and 6-lead SOT-23 1 See www.analog.com for the latest selection of low noise amplifiers. packages, and the ADA4895-2 is available in a 10-lead MSOP
COMPANION PRODUCTS
package. Al packages operate over the extended industrial temperature range of −40°C to +125°C.
ADCs: AD7944 (1 4-bit), AD7985 ( 16-bit), AD7986 ( 18-bit) Additional companion products on the ADA4895-1/ ADA4895-2 product page Rev. B Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2012–2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS COMPANION PRODUCTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ±5 V (OR +10 V) SUPPLY ±2.5 V (OR +5 V) SUPPLY ±1.5 V (OR +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 APPLICATIONS INFORMATION USING THE ADA4895-1/ADA4895-2 AT A GAIN < +10 HIGH GAIN BANDWIDTH APPLICATION FEEDBACK CAPACITOR APPLICATION WIDEBAND PHOTOMULTIPLIER PREAMPLIFIER LAYOUT CONSIDERATIONS Ground Plane Power Supply Bypassing OUTLINE DIMENSIONS ORDERING GUIDE