- 您现在的位置：买卖IC网 > PDF目录10661 > AD7864ASZ-1 (Analog Devices Inc)IC ADC 12BIT DUAL 4CH 44-MQFP PDF资料下载
参数资料
| 型号： | AD7864ASZ-1 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT DUAL 4CH 44-MQFP |
| 标准包装： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 520k |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 120mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-QFP |
| 供应商设备封装： | 44-MQFP（10x10） |
| 包装： | 托盘 |
| 输入数目和类型： | 4 个差分，双极 |
| 产品目录页面： | 779 (CN2011-ZH PDF) |
当前第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
4-Channel, Simultaneous Sampling,
High Speed, 12-Bit ADC
AD7864
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalog Devices foritsuse,nor for anyinfringements ofpatents orother
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
1998–2009 Analog Devices, Inc. All rights reserved.
FEATURES
High speed (1.65 μs) 12-bit ADC
4 simultaneously sampled inputs
4 track-and-hold amplifiers
0.35 μs track-and-hold acquisition time
1.65 μs conversion time per channel
HW/SW select of channel sequence for conversion
Single-supply operation
Selection of input ranges
±10 V, ±5 V for AD7864-1
±2.5 V for AD7864-3 0 V to 2.5 V, 0 V to 5 V for AD7864-2
High speed parallel interface that allows
Interfacing to 3 V processors
Low power, 90 mW typical
Power saving mode, 20 μW typical
Overvoltage protection on analog inputs
APPLICATIONS
AC motor control
Uninterrupted power supplies
Data acquisition systems
Communications
GENERAL DESCRIPTION
The AD7864 is a high speed, low power, 4-channel, simulta-
neous sampling 12-bit analog-to-digital converter (ADC) that
operates from a single 5 V supply. The part contains a 1.65 μs
successive approximation ADC, four track-and-hold amplifiers,
a 2.5 V reference, an on-chip clock oscillator, signal conditioning
circuitry, and a high speed parallel interface. The input signals
on four channels sample simultaneously preserving the relative
phase information of the signals on the four analog inputs. The
part accepts analog input ranges of ±10 V, ±5 V (AD7864-1), 0 V
to +2.5 V, 0 V to +5 V (AD7864-2), and ±2.5 V (AD7864-3).
Any subset of the four channels can be converted to maximize
the throughput rate on the selected sequence. Select the channels to
convert via hardware (channel select input pins) or software (pro-
gramming the channel select register).
A single conversion start signal (CONVST) simultaneously places
all the track-and-holds into hold and initiates a conversion se-
quence for the selected channels. The EOC signal indicates the end
of each individual conversion in the selected conversion sequence.
The BUSY signal indicates the end of the conversion sequence.
FUNCTIONAL BLOCK DIAGRAM
STBY
FRSTDATA
INT/EXT CLOCK
SELECT
OUTPUT
DATA
REGISTERS
2.5V
REFERENCE
SIGNAL
SCALING
VIN1A
VIN1B
VIN2A
VIN2B
VIN3A
VIN3B
VIN4A
VIN4B
BUSY
SIGNAL
SCALING
SIGNAL
SCALING
SIGNAL
SCALING
TRACK-AND-HOLD
×4
EOC
WR
CS
DB0
DB11
RD
AGND
DGND
VDRIVE
DVDD
VREFGND
VREF
AVDD
6k
AD7864
12-BIT
ADC
SOFTWARE
LATCH
CONVERSION
CONTROL LOGIC
MUX
CONVST
SL2
SL1
SL3 SL4 H/S
SEL
CLKIN INT/EXT
CLK
AGND AGND
INT
CLOCK
DB0 TO DB3
01
34
1-
00
1
Figure 1.
Data is read from the part by a 12-bit parallel data bus using the
standard CS and RD signals. Maximum throughput for a single
channel is 500 kSPS. For all four channels, the maximum throughput
is 130 kSPS for the read-during-conversion sequence operation.
The throughput rate for the read-after-conversion sequence
operation depends on the read cycle time of the processor. See
the
section. The AD7864 is available in a
small (0.3 square inch area) 44-lead MQFP.
PRODUCT HIGHLIGHTS
1.
Four track-and-hold amplifiers and a fast (1.65 μs) ADC for
simultaneous sampling and conversion of any subset of the
four channels.
2.
A single 5 V supply consuming only 90 mW typical, makes
it ideal for low power and portable applications. See the
Standby Mode Operation section.
3.
High speed parallel interface for easy connection to micro-
processors, microcontrollers, and digital signal processors.
4.
Available in three versions with different analog input
ranges. The AD7864-1 offers the standard industrial input
ranges of ±10 V and ±5 V; the AD7864-3 offers the common
signal processing input range of ±2.5 V; the AD7864-2 can
be used in unipolar, 0 V to 2.5 V and 0 V to 5 V,
applications.
5.
Features very tight aperture delay matching between the
four input sample-and-hold amplifiers.
相关PDF资料 |
PDF描述 |
|---|---|
| VI-B1V-IV-F1 | CONVERTER MOD DC/DC 5.8V 150W |
| MAX9077ESA+T | IC COMPARATOR DUAL 8-SOIC |
| MAX918ESA+T | IC COMPARATOR BTR 8-SOIC |
| LTC2246CUH#PBF | IC ADC 14BIT 25MSPS SAMPL 32-QFN |
| VE-B1W-IV-F4 | CONVERTER MOD DC/DC 5.5V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7864ASZ-12 | 制造商:AD 制造商全称:Analog Devices 功能描述:4-Channel, Simultaneous Sampling, High Speed, 12-Bit ADC |
| AD7864ASZ-1KL1 | 制造商:Analog Devices 功能描述: |
| AD7864ASZ-1REEL | 功能描述:IC ADC 12BIT DUAL 4CH 44-MQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
| AD7864ASZ-1REEL2 | 制造商:AD 制造商全称:Analog Devices 功能描述:4-Channel, Simultaneous Sampling, High Speed, 12-Bit ADC |
| AD7864ASZ-2 | 功能描述:IC ADC 12BIT PAR 520K 4CH 44MQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
发布紧急采购，3分钟左右您将得到回复。