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AD7490BCP-REEL

更新时间： 2024-12-01 21:22:07
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
24页 883K
描述
IC 16-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC32, MO-220-VHHD-2, LFCSP-32, Analog to Digital Converter

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AD7490BCP-REEL 数据手册

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16-Channel, 1 MSPS, 12-Bit ADC  
with Sequencer in 28-Lead TSSOP  
a
AD7490  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Fast Throughput Rate: 1 MSPS  
V
DD  
Specified for VDD of 2.7 V to 5.25 V  
Low Power at Max Throughput Rates:  
5.4 mW Max at 870 kSPS with 3 V Supplies  
12.5 mW Max at 1 MSPS with 5 V Supplies  
16 (Single-Ended) Inputs with Sequencer  
Wide Input Bandwidth:  
69.5 dB SNR at 50 kHz Input Frequency  
Flexible Power/Serial Clock Speed Management  
No Pipeline Delays  
High Speed Serial Interface SPI™/QSPI™/  
MICROWIRE™/DSP Compatible  
Full Shutdown Mode: 0.5 ꢀA Max  
28-Lead TSSOP and 32-Lead LFCSP Packages  
REF  
IN  
V
0
IN  
T/H  
•
•
•
•
•
•
•
•
•
•
•
•
•
12-BIT  
SUCCESSIVE  
APPROXIMATION  
ADC  
I/P  
MUX  
V
15  
IN  
SCLK  
DOUT  
DIN  
CONTROL LOGIC  
SEQUENCER  
GENERAL DESCRIPTION  
The AD7490 is a 12-bit high speed, low power, 16-channel,  
successive-approximation ADC. The part operates from a single  
2.7 V to 5.25 V power supply and features throughput rates up  
to 1 MSPS. The part contains a low noise, wide bandwidth  
track-and-hold amplifier that can handle input frequencies in  
excess of 1 MHz.  
CS  
AD7490  
V
DRIVE  
GND  
The conversion process and data acquisition are controlled  
using CS and the serial clock signal, allowing the device to  
easily interface with microprocessors or DSPs. The input signal  
is sampled on the falling edge of CS and conversion is also  
initiated at this point. There are no pipeline delays associated  
with the part.  
PRODUCT HIGHLIGHTS  
1. High Throughput with Low Power Consumption  
The AD7490 offers up to 1 MSPS throughput rates. At  
maximum throughput with 3 V supplies, the AD7490  
dissipates just 5.4 mW of power.  
The AD7490 uses advanced design techniques to achieve very  
low power dissipation at high throughput rates. For maximum  
throughput rates, the AD7490 consumes just 1.8 mA with 3 V  
supplies, and 2.5 mA with 5 V supplies.  
2. Sixteen Single-Ended Inputs with Channel Sequencer  
A Sequence of channels can be selected, through which the  
AD7490 will cycle and convert.  
3. Single-Supply Operation with VDRIVE Function  
By setting the relevant bits in the Control Register, the analog  
input range for the part can be selected to be a 0 to REFIN input or  
a 0 to 2 ꢀ REFIN with either straight binary or twos complement  
output coding. The AD7490 features 16 single-ended analog  
inputs with a channel sequencer to allow a preprogrammed  
selection of channels to be converted sequentially.  
The AD7490 operates from a single 2.7 V to 5.25 V supply.  
The VDRIVE function allows the serial interface to connect  
directly to either 3 V or 5 V processor systems independent  
of VDD  
.
4. Flexible Power/Serial Clock Speed Management  
The conversion rate is determined by the serial clock, allowing  
the conversion time to be reduced through the serial clock  
speed increase. The part also features various shutdown  
modes to maximize power efficiency at lower throughput  
rates. Power consumption is 0.5 µA max when in full shutdown.  
The conversion time is determined by the SCLK frequency as  
this is also used as the master clock to control the conversion.  
The AD7490 is available in a 28-lead thin shrink small outline  
(TSSOP) package, and a 32-lead chip scale package.  
5. No Pipeline Delay  
The part features a standard successive-approximation ADC  
with accurate control of the sampling instant via a CS input  
and once off conversion control.  
SPI and QSPI are trademarks of Motorola Inc.  
MICROWIRE is a trademark of National Semiconductor Corporation  
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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
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  
www.analog.com  
© Analog Devices, Inc., 2002  
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AD7490BCP-REEL 替代型号

型号 品牌 替代类型 描述 数据表
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