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參數資料
| 型號： | AD7878BQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS Complete 12-Bit 100 kHz Sampling ADC with DSP Interface |
| 中文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, CDIP28 |
| 封裝： | HERMETIC SEALED, CERDIP-28 |
| 文件頁數： | 1/16頁 |
| 文件大?。?/td> | 417K |
| 代理商： | AD7878BQ |
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, 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.
a
AD7878
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
Analog Devices, Inc., 1997
LC
2
MOS Complete 12-Bit
100 kHz Sampling ADC with DSP Interface
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Complete ADC with DSP Interface, Comprising:
Track/Hold Amplifier with 2
m
s Acquisition Time
7
m
s A/D Converter
3 V Zener Reference
8-Word FIFO and Interface Logic
72 dB SNR at 10 kHz Input Frequency
Interfaces to High Speed DSP Processors, e.g.,
ADSP-2100, TMS32010, TMS32020
41 ns max Data Access Time
Low Power, 60 mW typ
APPLICATIONS
Digital Signal Processing
Speech Recognition and Synthesis
Spectrum Analysis
High Speed Modems
DSP Servo Control
GENERAL DESCRIPTION
The AD7878 is a fast, complete, 12-bit A/D converter with a
versatile DSP interface consisting of an 8-word, first-in, first-out
(FIFO) memory and associated control logic.
The FIFO memory allows up to eight samples to be digitized
before the microprocessor is required to service the A/D con-
verter. The eight words can then be read out of the FIFO at
maximum microprocessor speed. A fast data access time of
41 ns allows direct interfacing to DSP processors and high
speed 16-bit microprocessors.
An on-chip status/control register allows the user to program the
effective length of the FIFO and contains the FIFO out of
range, FIFO empty and FIFO word count information.
The analog input of the AD7878 has a bipolar range of
±
3 V.
The AD7878 can convert full power signals up to 50 kHz and is
fully specified for dynamic parameters such as signal-to-noise
ratio and harmonic distortion.
The AD7878 is fabricated in Linear Compatible CMOS
(LC
2
MOS), an advanced, mixed technology process that com-
bines precision bipolar circuits with low power CMOS logic.
The part is available in four package styles, 28-pin plastic and
hermetic dual-in-line package (DIP), leadless ceramic chip
carrier (LCCC) or plastic leaded chip carrier (PLCC).
PRODUCT HIGHLIGHTS
1. Complete A/D Function with DSP Interface
The AD7878 provides the complete function for digitizing
ac signals to 12-bit accuracy. The part features an on-chip
track/hold, on-chip reference and 12-bit A/D converter. The
additional feature of an 8-word FIFO reduces the high soft-
ware overheads associated with servicing interrupts in DSP
processors.
2. Dynamic Specifications for DSP Users
The AD7878 is fully specified and tested for ac parameters,
including signal-to-noise ratio, harmonic distortion and
intermodulation distortion. Key digital timing parameters
are also tested and specified over the full operating tempera-
ture range.
3. Fast Microprocessor Interface
Data access time of 41 ns is the fastest ever achieved in a
monolithic A/D converter, and makes the AD7878 compat-
ible with all modern 16-bit microprocessors and digital
signal processors.
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| AD7878JN | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 12-bit Parallel 28-Pin PDIP W 制造商:Rochester Electronics LLC 功能描述:COMPLETE 12 BIT ADC IC - Bulk 制造商:Analog Devices 功能描述:LC2MOS Complete 12-Bit 100 kHz Sampling ADC with DSP Interface |
| AD7878JNZ | 功能描述:IC ADC 12BIT W/DSP INT 28-DIP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
| AD7878JP | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 12-bit Parallel 28-Pin PLCC 制造商:Rochester Electronics LLC 功能描述:12-BIT ADC IC - Bulk |
| AD7878JPZ | 功能描述:IC ADC 12BIT W/DSP INT 28-PLCC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 位數:12 采樣率（每秒）:3M 數據接口:- 轉換器數目:- 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 供應商設備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數目和類型:- |
| AD7878JPZ-REEL | 功能描述:IC ADC 12BIT W/DSP 28PLCC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
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