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| 型號(hào)： | AD7829BRZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 8BIT 8CH 2MSPS 28-SOIC |
| 產(chǎn)品變化通告： | Product Discontinuance 27/Oct/2011 |
| 標(biāo)準(zhǔn)包裝： | 400 |
| 位數(shù)： | 8 |
| 采樣率（每秒）： | 2M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 36mW |
| 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： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SOIC W |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 8 個(gè)單端，單極 |
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3 V/5 V, 2 MSPS, 8-Bit, 1-/4-/8-Channel
Sampling ADCs
AD7822/AD7825/AD7829
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
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
2006 Analog Devices, Inc. All rights reserved.
FEATURES
8-bit half-flash ADC with 420 ns conversion time
One, four, and eight single-ended analog input channels
Available with input offset adjust
On-chip track-and-hold
SNR performance given for input frequencies up to 10 MHz
On-chip reference (2.5 V)
Automatic power-down at the end of conversion
Wide operating supply range
3 V ± 10% and 5 V ± 10%
Input ranges
0 V to 2 V p-p, VDD = 3 V ± 10%
0 V to 2.5 V p-p, VDD = 5 V ± 10%
Flexible parallel interface with EOC pulse to allow
standalone operation
APPLICATIONS
Data acquisition systems, DSP front ends
Disk drives
Mobile communication systems, subsampling
applications
GENERAL DESCRIPTION
The AD7822/AD7825/AD7829 are high speed, 1-, 4-, and
8-channel, microprocessor-compatible, 8-bit analog-to-digital
converters with a maximum throughput of 2 MSPS. The AD7822/
AD7825/AD7829 contain an on-chip reference of 2.5 V
(2% tolerance); a track-and-hold amplifier; a 420 ns, 8-bit half-
flash ADC; and a high speed parallel interface. The converters
can operate from a single 3 V ± 10% and 5 V ± 10% supply.
The AD7822/AD7825/AD7829 combine the convert start and
power-down functions at one pin, that is, the CONVST pin.
This allows a unique automatic power-down at the end of a
conversion to be implemented. The logic level on the CONVST
pin is sampled after the end of a conversion when an EOC (end
of conversion) signal goes high. If it is logic low at that point,
the ADC is powered down. The AD7822 and AD7825 also have
a separate power-down pin (see the Operating Modes section).
The parallel interface is designed to allow easy interfacing to
microprocessors and DSPs. Using only address decoding logic,
the parts are easily mapped into the microprocessor address
space. The EOC pulse allows the ADCs to be used in a stand-
alone manner (see the Parallel Interface section.)
FUNCTIONAL BLOCK DIAGRAM
CONVST
PARALLEL
PORT
VREF IN/OUT
EOC
RD
CS
AGND
VMID
A01 A11 A22
VIN1
VIN24
VIN34
VIN44
VIN55
VIN65
VIN75
VIN85
COMP
PD3
2.5V
REF
VDD
CONTROL
LOGIC
DGND
INPUT
MUX
T/H
BUF
DB0
DB7
1A0, A1
AD7825/AD7829
2A2
AD7829
3PD
AD7822/AD7825
4VIN2 TO VIN4
AD7825/AD7829
5VIN5 TO VIN8
AD7829
8-BIT
HALF
FLASH
ADC
01
32
1-
00
1
Figure 1.
The AD7822 and AD7825 are available in 20-lead and 24-lead,
0.3" wide, plastic dual in-line packages (PDIP); 20-lead and
24-lead standard small outline packages (SOIC); and 20-lead
and 24-lead thin shrink small outline packages (TSSOP). The
AD7829 is available in a 28-lead, 0.6" wide PDIP; a 28-lead
SOIC; and a 28-lead TSSOP.
PRODUCT HIGHLIGHTS
1.
Fast Conversion Time. The AD7822/AD7825/AD7829
have a conversion time of 420 ns. Faster conversion times
maximize the DSP processing time in a real-time system.
2.
Analog Input Span Adjustment. The VMID pin allows the
user to offset the input span. This feature can reduce the
requirements of single-supply op amps and take into
account any system offsets.
3.
FPBW (Full Power Bandwidth) of Track-and-Hold.
The track-and-hold amplifier has an excellent high
frequency performance. The AD7822/AD7825/AD7829
are capable of converting full-scale input signals up to a
frequency of 10 MHz. This makes the parts ideally suited
to subsampling applications.
4.
Channel Selection. Channel selection is made without the
necessity of writing to the part.
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| AD7834AN | 功能描述:IC DAC 14BIT QUAD SRL 28-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 設(shè)置時(shí)間:1µs 位數(shù):8 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
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