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ADA4895-1AR-EBZ PDF预览

ADA4895-1AR-EBZ

更新时间: 2024-01-12 13:18:42
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亚德诺 - ADI /
页数 文件大小 规格书
24页 591K
描述
Low Power, 1 nV/√Hz, G ≥ 10 Stable, Railto- Rail Output Amplifier

ADA4895-1AR-EBZ 数据手册

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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  
1 nV/√Hz  
1.6 pA/√Hz  
NC  
–IN  
+IN  
1
2
3
4
8
7
6
5
DISABLE  
+V  
S
OUT  
NC  
–V  
S
ADA4895-1  
Low 1/f noise: 2 nV/√Hz at 10 Hz  
Low distortion (SFDR): −96 dBc at 100 kHz, VOUT = 2 V p-p  
Low power: 3 mA per amplifier  
Low input offset voltage: 350 µV maximum  
High speed  
236 MHz, −3 dB bandwidth (G = +10)  
943 V/µs slew rate  
22 ns settling time to 0.1%  
Rail-to-rail output  
NC = NO CONNECT. DO NOT  
CONNECT TO THIS PIN.  
Figure 1. ADA4895-1 Single Amplifier (8-Lead SOIC)  
OUT1  
–IN1  
+IN1  
1
2
3
4
5
10 +V  
S
9
8
7
6
OUT2  
–IN2  
–V  
+IN2  
S
ADA4895-2  
DISABLE1  
DISABLE2  
Wide supply range: 3 V to 10 V  
Disable feature  
Figure 2. ADA4895-2 Dual Amplifier (10-Lead MSOP)  
30  
24  
18  
12  
6
5
4
3
2
1
0
APPLICATIONS  
Low noise preamplifier  
Ultrasound amplifiers  
PLL loop filters  
High performance analog-to-digital converter (ADC) drivers  
Digital-to-analog converter (DAC) buffers  
GENERAL DESCRIPTION  
VOLTAGE  
CURRENT  
The ADA4895-1 (single) and ADA4895-2 (dual) are high speed  
voltage feedback amplifiers that are gain ≥ 10 stable with low  
input noise, rail-to-rail output, and a quiescent current of 3 mA per  
amplifier. With a 1/f noise of 2 nV/√Hz at 10 Hz and a spurious-  
free dynamic range (SFDR) of −72 dBc at 2 MHz, the ADA4895-1/  
ADA4895-2 are an ideal solution in a variety of applications,  
including ultrasound, low noise preamplifiers, and drivers of  
high performance ADCs. The Analog Devices, Inc., proprietary  
next generation SiGe bipolar process and innovative architecture  
enables the high performance of these amplifiers.  
0
1
10  
100  
1k  
10k  
100k  
1M  
FREQUENCY (Hz)  
Figure 3. Input Voltage and Current Noise vs. Frequency  
Table 1. Other Low Noise Amplifiers1  
ven  
at 100 kHz Bandwidth Supply  
Part Number(s)  
AD8021  
(nV/√Hz)  
(MHz)  
490  
1000  
510  
80  
230  
230  
65  
Voltage (V)  
2.1  
3
0.95  
5 to 24  
3.3 to 12  
5 to 12  
2.7 to 12  
3 to 10  
3 to 10  
AD8045  
AD8099  
The ADA4895-1/ADA4895-2 have a small signal bandwidth of  
236 MHz at a gain of +10 with a slew rate of 943 V/µs, and settle  
to 0.1% in 22 ns. The wide supply voltage range (3 V to 10 V)  
of the ADA4895-1/ADA4895-2 make these amplifiers ideal  
candidates for systems that require large dynamic range, high  
gain, precision, and high speed.  
ADA4841-1/ADA4841-2 2.1  
ADA4896-2  
1
1
ADA4897-1/ADA4897-2  
ADA4898-1/ADA4898-2 0.9  
ADA4899-1  
10 to 32  
5 to 12  
1
600  
1 See www.analog.com for the latest selection of low noise amplifiers.  
The ADA4895-1 is available in 8-lead SOIC and 6-lead SOT-23  
packages, and the ADA4895-2 is available in a 10-lead MSOP  
package. All packages operate over the extended industrial  
temperature range of −40°C to +125°C.  
COMPANION PRODUCTS  
ADCs: AD7944 (14-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  
rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700 ©2012–2015 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
 

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