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ADA4932-1YCPZ-R21

更新时间： 2024-11-23 12:28:35
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亚德诺 - ADI 驱动器
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Low Power Differential ADC Driver

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ADA4932-1YCPZ-R21 数据手册

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Low Power  
Differential ADC Driver  
ADA4932-1/ADA4932-2  
FUNCTIONAL BLOCK DIAGRAMS  
FEATURES  
High performance at low power  
High speed  
−3 dB bandwidth of 560 MHz, G = 1  
0.1 dB gain flatness to 300 MHz  
Slew rate: 2800 V/μs, 25% to 75%  
Fast 0.1% settling time of 9 ns  
Low power: 9.6 mA per amplifier  
Low harmonic distortion  
ADA4932-1  
12 PD  
–FB  
+IN  
–IN  
1
2
3
4
11 –OUT  
10 +OUT  
+FB  
9
V
OCM  
100 dB SFDR @ 10 MHz  
90 dB SFDR @ 20 MHz  
Figure 1. ADA4932-1  
Low input voltage noise: 3.6 nV/√Hz  
0.5 mV typical input offset voltage  
Externally adjustable gain  
Can be used with fractional differential gains  
Differential-to-differential or single-ended-to-differential  
operation  
Adjustable output common-mode voltage  
Input common-mode range shifted down by 1 VBE  
Wide supply range: +3 V to 5 V  
Available in 16-lead and 24-lead LFCSP packages  
–IN1  
+FB1  
1
18 +OUT1  
17 V  
2
3
4
5
6
OCM1  
16 –V  
+V  
S2  
S2  
S1  
ADA4932-2  
–V  
15  
14  
+V  
S1  
–FB2  
+IN2  
PD2  
13 –OUT2  
APPLICATIONS  
ADC drivers  
Figure 2. ADA4932-2  
Single-ended-to-differential converters  
IF and baseband gain blocks  
Differential buffers  
–40  
–50  
V
= 2V p-p  
OUT, dm  
HD2, G = 1  
HD3, G = 1  
HD2, G = 2  
HD3, G = 2  
–60  
Line drivers  
–70  
GENERAL DESCRIPTION  
–80  
The ADA4932-x is the next generation AD8132 with higher  
performance, and lower noise and power consumption. It is an  
ideal choice for driving high performance ADCs as a single-ended-  
to-differential or differential-to-differential amplifier. The output  
common-mode voltage is user adjustable by means of an internal  
common-mode feedback loop, allowing the ADA4932-x output  
to match the input of the ADC. The internal feedback loop also  
provides exceptional output balance as well as suppression of  
even-order harmonic distortion products.  
–90  
–100  
–110  
–120  
–130  
–140  
100k  
1M  
10M  
FREQUENCY (Hz)  
100M  
Figure 3. Harmonic Distortion vs. Frequency at Various Gains  
With the ADA4932-x, differential gain configurations are easily  
realized with a simple external four-resistor feedback network that  
determines the closed-loop gain of the amplifier.  
The ADA4932-x is available in a Pb-free, 3 mm × 3 mm 16-lead  
LFCSP (ADA4932-1, single) or a Pb-free, 4 mm × 4 mm 24-lead  
LFCSP (ADA4932-2, dual). The pinout has been optimized to  
facilitate PCB layout and minimize distortion. The ADA4932-1  
and the ADA4932-2 are specified to operate over the −40°C to  
+105°C temperature range; both operate on supplies between  
+3 V and 5 V.  
The ADA4932-x is fabricated using the Analog Devices, Inc.,  
proprietary silicon-germanium (SiGe) complementary bipolar  
process, enabling it to achieve low levels of distortion and noise  
at low power consumption. The low offset and excellent dynamic  
performance of the ADA4932-x make it well suited for a wide  
variety of data acquisition and signal processing applications.  
Rev. A  
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  
www.analog.com  
Fax: 781.461.3113 ©2008–2009 Analog Devices, Inc. All rights reserved.  
 
 
 
 
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