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ADA4922-1

更新时间： 2024-11-23 04:31:15
品牌 Logo 应用领域
亚德诺 - ADI 驱动器高压
页数 文件大小 规格书
20页 420K
描述
High Voltage, Differential 18-Bit ADC Driver

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ADA4922-1 数据手册

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High Voltage, Differential  
18-Bit ADC Driver  
ADA4922-1  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Single-ended-to-differential conversion  
Low distortion (VO, dm = 40 V p-p)  
−99 dBc HD at 100 kHz  
ADA4922-1  
8
1
NC  
IN  
Low differential output referred noise: 12 nV/√Hz  
High input impedance: 11 MΩ  
Fixed gain of 2  
No external gain components required  
Low output-referred offset voltage: 1.1 mV max  
Low input bias current: 3.5 μA max  
Wide supply range  
2
3
7
6
5
REF  
DIS  
V
V
S+  
S–  
OUT+  
4
OUT–  
NC = NO CONNECT  
5 V to 26 V  
Figure 1.  
Can produce differential output signals in excess of 40 V p-p  
High speed  
38 MHz, −3 dB bandwidth @ 0.2 V p-p differential output  
Fast settling time  
–84  
–87  
SECOND HARMONIC  
THIRD HARMONIC  
R
= 2kΩ  
L
–90  
200 ns to 0.01% for 12 V step on 5 V supplies  
Disable feature  
–93  
–96  
V
= ±5V, V  
= 12V p-p  
O, dm  
S
Available in space-saving, thermally enhanced packages  
3 mm × 3 mm LFCSP  
8-lead SOIC_EP  
–99  
–102  
–105  
–108  
–111  
–114  
–117  
–120  
Low supply current: IS = 10 mA on 12 V supplies  
APPLICATIONS  
V
= ±12V, V  
= 40V p-p  
100  
S
O, dm  
High voltage data acquisition systems  
Industrial instrumentation  
Spectrum analysis  
1
10  
FREQUENCY (kHz)  
Figure 2. Harmonic Distortion for Various Power Supplies  
ATE  
Medical instruments  
GENERAL DESCRIPTION  
The ADA4922-1 is a differential driver for 16-bit to 18-bit  
ADCs that have differential input ranges up to 2ꢀ ꢁ.  
Configured as an easy-to-use, single-ended-to-differential  
amplifier, the ADA4922-1 requires no external components to  
drive ADCs. The ADA4922-1 provides essential benefits such as  
low distortion and high SNR that are required for driving ADCs  
with resolutions up to 18 bits.  
The ADA4922-1 is manufactured on ADI’s proprietary second-  
generation XFCB process that enables the amplifier to achieve  
excellent noise and distortion performance on high supply  
voltages.  
The ADA4922-1 is available in an 8-lead 3 mm × 3 mm LFCSP  
as well as an 8-lead SOIC package. Both packages are equipped  
with an exposed paddle for more efficient heat transfer. The  
ADA4922-1 is rated to work over the extended industrial  
temperature range, −4ꢀ°C to +85°C.  
With a wide supply voltage range (5 ꢁ to 26 ꢁ), high input  
impedance, and fixed differential gain of 2, the ADA4922-1 is  
designed to drive ADCs found to in a variety of applications,  
including industrial instrumentation.  
Rev. 0  
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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
© 2005 Analog Devices, Inc. All rights reserved.  
 
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