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ADA4922-1_16 PDF预览

ADA4922-1_16

更新时间: 2024-02-29 17:59:29
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亚德诺 - ADI /
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20页 513K
描述
High Voltage, Differential 18-Bit ADC Driver

ADA4922-1_16 数据手册

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High Voltage, Differential  
18-Bit ADC Driver  
Data Sheet  
ADA4922-1  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Single-ended-to-differential conversion  
Low distortion (VO, dm = 40 V p-p)  
−99 dBc HD at 100 kHz  
Low differential output referred noise: 12 nV/√Hz  
High input impedance: 11 MΩ  
ADA4922-1  
TOP VIEW  
IN  
NIC  
1
2
3
4
8
7
6
5
REF  
DIS  
V
V
S–  
S+  
Fixed gain of 2  
OUT–  
OUT+  
No external gain components required  
Low output-referred offset voltage: 1.1 mV maximum  
Low input bias current: 3.5 μA maximum  
Wide supply range  
NOTES  
1. EXPOSED PAD MUST BE CONNECTED TO GND.  
2. NIC = NO INTERAL CONNECTION.  
Figure 1.  
5 V to 26 V  
Can produce differential output signals in excess of 40 V p-p  
High speed  
38 MHz, −3 dB bandwidth at 0.2 V p-p differential output  
Fast settling time  
200 ns to 0.01% for 12 V step on 5 V supplies  
Disable feature  
Available in space-saving, thermally enhanced packages  
8-lead, 3 mm × 3 mm LFCSP  
8-lead SOIC  
The ADA4922-1 is manufactured on Analog Devices, Inc.,  
proprietary, second-generation XFCB process that enables the  
amplifier to achieve excellent noise and distortion performance  
on high supply voltages.  
Low supply current: IS = 10 mA on 12 V supplies  
APPLICATIONS  
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.  
High voltage data acquisition systems  
Industrial instrumentation  
Spectrum analysis  
ATE  
Medical instruments  
–84  
SECOND HARMONIC  
THIRD HARMONIC  
R
= 2k  
L
–87  
–90  
GENERAL DESCRIPTION  
The ADA4922-1 is a differential driver for 16-bit to 18-bit  
analog-to-digital converters (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.  
–93  
–96  
V
= 5V, V  
= 12V p-p  
O, dm  
S
–99  
–102  
–105  
–108  
–111  
–114  
–117  
–120  
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.  
V
= 12V, V  
O, dm  
= 40V p-p  
100  
S
1
10  
FREQUENCY (kHz)  
Figure 2. Harmonic Distortion for Various Power Supplies  
Rev. A  
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  
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 ©2005–2016 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 

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