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| 型号： | AD7887AR |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 2CH SRL 8-SOIC |
| 设计资源： | Software Calibrated, 1 MHz to 8 GHz, 70 dB RF Power Measurement System Using AD8318 (CN0150) |
| 标准包装： | 98 |
| 位数： | 12 |
| 采样率（每秒）： | 125k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 3.5mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
| 输入数目和类型： | 2 个单端，单极 |
2.7 V to 5.25 V, Micropower, 2-Channel,
125 kSPS, 12-Bit ADC in 8-Lead MSOP
AD7887
Rev. D
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
2009 Analog Devices, Inc. All rights reserved.
FEATURES
Specified for VDD of 2.7 V to 5.25 V
Flexible power/throughput rate management
Shutdown mode: 1 μA max
One or two single-ended inputs
Serial interface: SPI/QSPI/MICROWIRE/DSP compatible
8-lead narrow SOIC and MSOP packages
APPLICATIONS
Battery-powered systems (personal digital assistants,
medical instruments, mobile communications)
Instrumentation and control systems
High speed modems
FUNCTIONAL BLOCK DIAGRAM
SAR + ADC
CONTROL LOGIC
GND
AIN0
SCLK
DOUT
DIN
VDD
AD7887
CS
T/H
I/P
MUX
BUF
CHARGE
REDISTRIBUTION
DAC
COMP
AIN1/
VREF
AIN1/VREF
SOFTWARE
CONTROL
LATCH
2.5V
REF
SPORT
0
61
91
-0
01
Figure 1.
GENERAL DESCRIPTION
The AD7887 is a high speed, low power, 12-bit analog-to-digital
converter (ADC) that operates from a single 2.7 V to 5.25 V
power supply. The AD7887 is capable of 125 kSPS throughput
rate. The input track-and-hold acquires a signal in 500 ns and
features a single-ended sampling scheme. The output coding for
the AD7887 is straight binary, and the part is capable of
converting full power signals of up to 2.5 MHz.
The AD7887 can be configured for either dual- or single-channel
operation via the on-chip control register. There is a default
single-channel mode that allows the AD7887 to be operated as a
read-only ADC. In single-channel operation, there is one
analog input (AIN0) and the AIN1/VREF pin assumes its VREF
function. This VREF pin allows the user access to the part’s
internal 2.5 V reference, or the VREF pin can be overdriven by an
external reference to provide the reference voltage for the part.
This external reference voltage has a range of 2.5 V to VDD. The
analog input range on AIN0 is 0 to VREF.
In dual-channel operation, the AIN1/VREF pin assumes its AIN1
function, providing a second analog input channel. In this case,
the reference voltage for the part is provided via the VDD pin. As
a result, the input voltage range on both the AIN0 and AIN1
inputs is 0 to VDD.
CMOS construction ensures low power dissipation of typically
2 mW for normal operation and 3 μW in power-down mode.
The part is available in an 8-lead, 0.15-inch-wide narrow body
SOIC and an 8-lead MSOP package.
PRODUCT HIGHLIGHTS
1.
Smallest 12-bit dual-/single-channel ADC; 8-lead MSOP
package.
2.
Lowest power 12-bit dual-/single-channel ADC.
3.
Flexible power management options, including automatic
power-down after conversion.
4.
Read-only ADC capability.
5.
Analog input range from 0 V to VREF.
6.
Versatile serial input/output port (SPI/QSPI/MICROWIRE/
DSP compatible).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7887ARM | 功能描述:IC ADC 12BIT 2CH SRL 8-MSOP RoHS:否 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:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7887ARM-REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 125ksps 12-bit Serial 8-Pin MSOP T/R |
| AD7887ARM-REEL7 | 功能描述:IC ADC 12BIT 2CH SRL 8-MSOP RoHS:否 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:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7887ARMZ | 功能描述:IC ADC 12BIT 2CH SRL 8MSOP 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 |
| AD7887ARMZ | 制造商:Analog Devices 功能描述:IC ADC 12BIT 125KSPS MSOP-8 |
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