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參數(shù)資料
| 型號： | AD7470 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 1.75MSPS, 4mW 10-Bit/12-Bit SAR ADC(1.75MSPS,10位逐次逼近A/D轉(zhuǎn)換器) |
| 中文描述： | 1.75MSPS，4mW變10-Bit/12-Bit SAR型ADC（1.75MSPS，10位逐次逼近的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 124K |
| 代理商： | AD7470 |
AD7470/72
a
Prelimnary Technical Data
REV. PrD 09/98
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, PO. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1998
1.75MSPS, 4mW
10-Bit/12-Bit SAR ADC
using standard control inputs allowing easy interfacing to mi-
croprocessors or DSPs. T he input signal is sampled on the
falling edge of
CONVST
and conversion is also initiated at this
point. T he BUSY goes high at the start of conversion and goes
low 465ns later to indicate that the conversion is complete.
T here are no pipelined delays associated with the part. T he
conversion result is accessed via standard
CS
and
RD
signals
over a high speed parallel interface.
T he AD7470/AD7472 uses advanced design techniques to
achieve very low power dissipation at high throughput rates.
With 3V supplies and 1.75MSPS throughput rate, the parts
consume just 1mA. With 5V supplies and 1.75MSPS, the
current consumption is 1.8mA. T he part also offers flexible
power/throughput rate management. Operating the part with
3V supplies and 500ksps throughput reduces the current con-
sumption to 0.5mA. At 5V supplies and 500ksps, the part
consumes 0.8mA.
It is also possible to operate the parts in an auto shutdown
mode, where the part powers up to do a conversion and auto-
matically enters shutdown mode at the end of conversion.
TECHNCAL
FUNCT IONAL BLOCK DIAGRAM
FEATURES
Specified for V
DD
of 2.7 V to 5.25 V
1.75MSPS for AD7470 (10-Bit)
1.5MSPS for AD7472 (12-Bit)
Low Power:
3mW typ at 1.75MSPS with 3V Supplies
9mW typ at 1.75MSPS with 5V Supplies
Wide Input Bandwidth:
70dB SNR at 500kHz Input Frequency
Flexible Power/Throughput Rate Management
No Pipeline Delays
High Speed Parallel Interface
Shut Down Mode: 500
n
A typ.
24-Pin SOIC and TSSOP Packages
GE NE RAL DE SCRIPT ION
T he AD7470/AD7472 are 10-bit /12-bit high speed, low
power, successive-approximation ADCs. T he parts operate
from a single 2.7 V to 5.25 V power supply and feature
throughput rates up to 1.5MSPS for the 12-bit AD7472 and
up to 1.75MSPS for the 10-bit AD7470. T he parts contain a
low-noise, wide bandwidth track/hold amplifier which can
handle input frequencies in excess of 1MHz.
T he conversion process and data acquisition are controlled
Using this method allows very low power dissipation numbers
at lower throughput rates. In this mode, the parts can be oper-
ated with 3V supplies at 100ksps, and consume an average
current of just 150uA. At 5V supplies and 100ksps, the average
current consumption is 270uA.
T he analog input range for the part is 0 to REF IN. T he +2.5V
reference is applied externally to the REF IN pin. T he conver-
sion rate is determined by the externally-applied clock.
PRODUCT HIGHLIGHT S
1.High T hroughput with Low Power Consumption the
AD7470 offers 1.75MSPS throughput and the AD7472
offers 1.5MSPS throughput rates with 3mW power
consumption.
2.Flexible Power/T hroughput Rate Management
T he conversion rate is determined by an externally-applied
clock allowing the power to be reduced as the conversion rate
is reduced. T he part also features an autoshutdown mode to
maximize power efficiency at lower throughput rates.
3.No Pipeline Delay.
T he part features a standard successive-approximation ADC
with accurate control of the sampling instant via a
CONVST
input and once off conversion control.
AD7470 is a 10 Bit part with DB0 to DB9 as outputs
AD7472 is a 12 Bit part with DB0 to DB11 as outputs
T/H
VIN
AD7470/AD7472
AVDD
10/12-BIT
SUCCESSIVE
APPRADC
REF IN
DB0
DB9 (DB11)
CLK IN
CONTROL LOGIC
CONVST
OUTPUT DRIVERS
VDRIVE
BUSY
CS
RD
AGND
DGND
DVDD
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD7472 | 1.75MSPS, 4mW 10-Bit/12-Bit SAR ADC(1.75MSPS,12位逐次逼近A/D轉(zhuǎn)換器) |
| AD7472AR | 1.75 MSPS, 4 mW 10-Bit/12-Bit Parallel ADCs |
| AD7472ARU | 1.75 MSPS, 4 mW 10-Bit/12-Bit Parallel ADCs |
| AD7472BR | 1.75 MSPS, 4 mW 10-Bit/12-Bit Parallel ADCs |
| AD7472BRU | 1.75 MSPS, 4 mW 10-Bit/12-Bit Parallel ADCs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7470_03 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1.75 MSPS, 4 mW 10-Bit/12-Bit Parallel ADCs |
| AD7470ARU | 功能描述:IC ADC 10BIT PARALLEL 24-TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 位數(shù):12 采樣率（每秒）:3M 數(shù)據(jù)接口:- 轉(zhuǎn)換器數(shù)目:- 功率耗散（最大）:- 電壓電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設(shè)備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數(shù)目和類型:- |
| ad7470-aru | 制造商:Analog Devices 功能描述: |
| AD7470ARU-REEL | 制造商:Analog Devices 功能描述:ADC SGL SAR 1.75MSPS 10-BIT PARALLEL 24TSSOP - Tape and Reel |
| AD7470ARU-REEL7 | 功能描述:IC ADC 10BIT PARALLEL 24-TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 位數(shù):12 采樣率（每秒）:3M 數(shù)據(jù)接口:- 轉(zhuǎn)換器數(shù)目:- 功率耗散（最大）:- 電壓電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設(shè)備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數(shù)目和類型:- |
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