參數(shù)資料
型號(hào)： AD7276AUJZ-REEL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 1/29頁(yè)
文件大小： 0K
描述： IC ADC 12BIT 3MSPS 6TSOT
標(biāo)準(zhǔn)包裝： 3,000
位數(shù)： 12
采樣率（每秒）： 3M
數(shù)據(jù)接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 19.8mW
電壓電源： 單電源
工作溫度： -40°C ~ 125°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： SOT-23-6 細(xì)型，TSOT-23-6
供應(yīng)商設(shè)備封裝： TSOT-23-6
包裝： 帶卷 (TR)
輸入數(shù)目和類(lèi)型： 1 個(gè)單端，單極
3 MSPS, 12-/10-/8-Bit
ADCs in 6-Lead TSOT
Rev. C
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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.
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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
2005–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Throughput rate: 3 MSPS
Specified for VDD of 2.35 V to 3.6 V
Power consumption
12.6 mW at 3 MSPS with 3 V supplies
Wide input bandwidth
70 dB SNR at 1 MHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface
SPI-/QSPI-/MICROWIRE-/DSP-compatible
Temperature range: 40°C to +125°C
Power-down mode: 0.1 μA typical
6-lead TSOT package
8-lead MSOP package
AD7476 and AD7476A pin-compatible
GENERAL DESCRIPTION
The AD7276/AD7277/AD7278 are 12-/10-/8-bit, high speed,
low power, successive approximation analog-to-digital converters
(ADCs), respectively. The parts operate from a single 2.35 V
to 3.6 V power supply and feature throughput rates of up to
3 MSPS. The parts contain a low noise, wide bandwidth track-
and-hold amplifier that can handle input frequencies in excess
of 55 MHz.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the devices to interface
with microprocessors or DSPs. The input signal is sampled on
the falling edge of CS, and the conversion is also initiated at this
point. There are no pipeline delays associated with the part.
The AD7276/AD7277/AD7278 use advanced design techniques
to achieve very low power dissipation at high throughput rates.
The reference for the part is taken internally from VDD. This
allows the widest dynamic input range to the ADC; therefore,
the analog input range for the part is 0 to VDD. The conversion
rate is determined by the SCLK.
FUNCTIONAL BLOCK DIAGRAM
04
90
3-
0
01
T/H
CONTROL
LOGIC
12-/10-/8-BIT
SUCCESSIVE
APPROXIMATION
ADC
GND
VDD
AD7276/
AD7277/
AD7278
VIN
SCLK
SDATA
CS
Figure 1.
Table 1.
Part Number
Resolution
Package
AD7276
12
8-Lead MSOP
6-Lead TSOT
AD7277
10
8-Lead MSOP
6-Lead TSOT
AD7278
8
8-Lead MSOP
6-Lead TSOT
12
8-Lead MSOP
8-Lead TSOT
10
8-Lead MSOP
8-Lead TSOT
1 Part contains external reference pin.
PRODUCT HIGHLIGHTS
1.
3 MSPS ADCs in a 6-lead TSOT package.
2.
AD7478A pin-compatible.
3.
High throughput with low power consumption.
4.
Flexible power/serial clock speed management. This allows
maximum power efficiency at low throughput rates.
5.
Reference derived from the power supply.
6.
No pipeline delay. The parts feature a standard successive
approximation ADC with accurate control of the sampling
instant via a CS input and once-off conversion control.
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