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AD526C

更新时间： 2024-11-06 22:53:27
品牌 Logo 应用领域
亚德诺 - ADI 放大器
页数 文件大小 规格书
14页 466K
描述
Software Programmable Gain Amplifier

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AD526C 数据手册

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Software Programmable  
Gain Amplifier  
a
AD526  
FEATURES  
PIN CONFIGURATION  
Digitally Programmable Binary Gains from 1 to 16  
Two-Chip Cascade Mode Achieves Binary Gain from  
1 to 256  
DIG GND  
NULL  
1
2
3
4
5
6
7
8
16 A1  
15 A0  
Gain Error:  
0.01% Max, Gain = 1, 2, 4 (C Grade)  
0.02% Max, Gain = 8, 16 (C Grade)  
0.5 ppm/؇C Drift Over Temperature  
Fast Settling Time  
10 V Signal Change:  
0.01% in 4.5 ␮s (Gain = 16)  
Gain Change:  
V
14  
CS  
IN  
NULL  
ANALOG GND 2  
ANALOG GND 1  
AD526  
TOP VIEW  
(Not to Scale)  
13  
12  
11  
10  
9
CLK  
A2  
B
–V  
S
+V  
S
V
SENSE  
V
FORCE  
OUT  
OUT  
0.01% in 5.6 ␮s (Gain = 16)  
Low Nonlinearity: ؎0.005% FSR Max (J Grade)  
Excellent DC Accuracy:  
Offset Voltage: 0.5 mV Max (C Grade)  
Offset Voltage Drift: 3 ␮V/؇C (C Grade)  
TTL-Compatible Digital Inputs  
PRODUCT DESCRIPTION  
APPLICATION HIGHLIGHTS  
The AD526 is a single-ended, monolithic software program-  
mable gain amplifier (SPGA) that provides gains of 1, 2, 4, 8  
and 16. It is complete, including amplifier, resistor network  
and TTL-compatible latched inputs, and requires no external  
components.  
1. Dynamic Range Extension for ADC Systems: A single  
AD526 in conjunction with a 12-bit ADC can provide  
96 dB of dynamic range for ADC systems.  
2. Gain Ranging Preamps: The AD526 offers complete digital  
gain control with precise gains in binary steps from 1 to 16.  
Additional gains of 32, 64, 128 and 256 are possible by cas-  
cading two AD526s.  
Low gain error and low nonlinearity make the AD526 ideal for  
precision instrumentation applications requiring programmable  
gain. The small signal bandwidth is 350 kHz at a gain of 16. In  
addition, the AD526 provides excellent dc precision. The FET-  
input stage results in a low bias current of 50 pA. A guaranteed  
maximum input offset voltage of 0.5 mV max (C grade) and low  
gain error (0.01%, G = 1, 2, 4, C grade) are accomplished using  
Analog Devices’ laser trimming technology.  
ORDERING GUIDE  
Temperature Package  
Range  
Package  
Options  
Model  
Descriptions  
To provide flexibility to the system designer, the AD526 can be  
operated in either latched or transparent mode. The force/sense  
configuration preserves accuracy when the output is connected  
to remote or low impedance loads.  
AD526JN  
Commercial  
Industrial  
Industrial  
Industrial  
Military  
16-Lead Plastic DIP N-16  
AD526AD  
AD526BD  
AD526CD  
AD526SD  
AD526SD/883B  
5962-9089401MEA* Military  
16-Lead Cerdip  
16-Lead Cerdip  
16-Lead Cerdip  
16-Lead Cerdip  
16-Lead Cerdip  
16-Lead Cerdip  
D-16  
D-16  
D-16  
D-16  
D-16  
D-16  
The AD526 is offered in one commercial (0°C to +70°C) grade,  
J, and three industrial grades, A, B and C, which are specified  
from –40°C to +85°C. The S grade is specified from –55°C to  
+125°C. The military version is available processed to MIL-  
STD 883B, Rev C. The J grade is supplied in a 16-lead plastic  
DIP, and the other grades are offered in a 16-lead hermetic  
side-brazed ceramic DIP.  
Military  
*Refer to official DESC drawing for tested specifications.  
REV. D  
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  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1999  
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