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參數資料
| 型號： | AD7476ARTZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/25頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 1MSPS LP SOT23-6 |
| 設計資源： | Output Channel Monitoring Using AD5380 (CN0008) AD5382 Channel Monitor Function (CN0012) AD5381 Channel Monitor Function (CN0013) AD5383 Channel Monitor Function (CN0015) AD5390/91/92 Channel Monitor Function (CN0030) Power off protected data acquisition signal chain using ADG4612 , AD711, and AD7476 (CN0165) |
| 標準包裝： | 3,000 |
| 位數： | 12 |
| 采樣率（每秒）： | 1M |
| 數據接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉換器數目： | 1 |
| 功率耗散（最大）： | 17.5mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-6 |
| 供應商設備封裝： | SOT-23-6 |
| 包裝： | 帶卷 (TR) |
| 輸入數目和類型： | 1 個單端，單極 |
| 配用： | EVAL-AD7476ACBZ-ND - BOARD EVALUATION FOR AD7476A |
1 MSPS, 12-/10-/8-Bit ADCs
in 6-Lead SOT-23
AD7476/AD7477/AD7478
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
2000–2009 Analog Devices, Inc. All rights reserved.
FEATURES
Fast throughput rate: 1 MSPS
Specified for VDD of 2.35 V to 5.25 V
Low power
3.6 mW at 1 MSPS with 3 V supplies
15 mW at 1 MSPS with 5 V supplies
Wide input bandwidth
70 dB SNR at 100 kHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface
SPI-/QSPI-/MICROWIRE-/DSP-compatible
Standby mode: 1 μA maximum
6-lead SOT-23 package
APPLICATIONS
Battery-powered systems
Personal digital assistants
Medical instruments
Mobile communications
Instrumentation and control systems
Data acquisition systems
High speed modems
Optical sensors
FUNCTIONAL BLOCK DIAGRAM
01
024
-00
1
CONTROL
LOGIC
12-/10-/8-BIT
SUCCESSIVE-
APPROXIMATION
ADC
VIN
SCLK
SDATA
CS
VDD
GND
AD7476/AD7477/AD7478
Figure 1.
GENERAL DESCRIPTION
The AD7476/AD7477/AD74781 are, respectively, 12-bit, 10-bit,
and 8-bit, high speed, low power, successive approximation
ADCs. The parts operate from a single 2.35 V to 5.25 V power
supply and feature throughput rates up to 1 MSPS. Each part
contains a low noise, wide bandwidth track-and-hold amplifier
that can handle input frequencies in excess of 6 MHz.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the devices to interface
with microprocessors or DSPs. The input signal is sampled on
the falling edge of CS and the conversion is initiated at this
point. There are no pipeline delays associated with these parts.
The AD7476/AD7477/AD7478 use advanced design techniques
to achieve very low power dissipation at high throughput rates.
The reference for the parts is taken internally from VDD. This
allows the widest dynamic input range to the ADC. Thus, the
analog input range for the parts are 0 V to VDD. The conversion
rate is determined by the SCLK.
1 Protected by U.S. Patent No. 6,681,332.
PRODUCT HIGHLIGHTS
1.
First 12-/10-/8-Bit ADCs in SOT-23 Packages.
2.
High Throughput with Low Power Consumption.
3.
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. This allows the average power consumption
to be reduced while not converting. The parts also feature a
shutdown mode to maximize power efficiency at lower
throughput rates. Current consumption is 1 μA maximum
when in shutdown mode.
4.
Reference Derived from the Power Supply.
5.
No Pipeline Delay. The parts feature a standard successive-
approximation ADC with accurate control of the sampling
instant via a CS input and once-off conversion control.
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