參數(shù)資料
型號(hào): AD7789BRMZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 1/20頁(yè)
文件大?。?/td> 0K
描述: IC ADC 24BIT LP 10-MSOP
標(biāo)準(zhǔn)包裝: 50
位數(shù): 24
采樣率(每秒): 16.6
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): 230µW
電壓電源: 單電源
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 10-MSOP
包裝: 管件
輸入數(shù)目和類型: 1 個(gè)差分,單極;1 個(gè)差分,雙極
產(chǎn)品目錄頁(yè)面: 779 (CN2011-ZH PDF)
Low Power, 16-/24-Bit,
Sigma-Delta ADCs
AD7788/AD7789
Rev. B
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
AD7788: 16-bit resolution
AD7789: 24-bit resolution
Power
Supply: 2.5 V to 5.25 V operation
Normal: 75 μA maximum
Power-down: 1 μA maximum
RMS noise: 1.5 μV
AD7788: 16-bit p-p resolution
AD7789: 19-bit p-p resolution (21.5 bits effective)
Integral nonlinearity: 3.5 ppm typical
Simultaneous 50 Hz and 60 Hz rejection
Internal clock oscillator
VDD monitor channel
10-lead MSOP
INTERFACE
3-wire serial
SPI-, QSPI-, MICROWIRE-, and DSP-compatible
Schmitt trigger on SCLK
APPLICATIONS
Smart transmitters
Battery applications
Portable instrumentation
Sensor measurement
Temperature measurement
Pressure measurement
Weigh scales
4 to 20 mA loops
FUNCTIONAL BLOCK DIAGRAM
03
539
-00
1
SERIAL
INTERFACE
AND
CONTROL
LOGIC
CLOCK
*AD7788: 16-BIT ADC
AD7789: 24-BIT ADC
AIN(+)
AIN(–)
GND
Σ-Δ
ADC*
AD7788/
AD7789
REFIN(+) REFIN(–)
VDD
DOUT/RDY
DIN
SCLK
CS
Figure 1.
GENERAL DESCRIPTION
The AD7788/AD7789 are low power, low noise, analog front
ends for low frequency measurement applications. The AD7789
contains a low noise, 24-bit, ∑-Δ ADC with one differential
input. The AD7788 is a 16-bit version of the AD7789.
The devices operate from an internal clock. Therefore, the
user does not have to supply a clock source to the devices.
The output data rate is 16.6 Hz, which gives simultaneous
50 Hz/60 Hz rejection.
The parts operate with a single power supply from 2.5 V to
5.25 V. When operating from a 3 V supply, the power dissi-
pation for the part is 225 μW maximum. The AD7788/AD7789
are available in a 10-lead MSOP.
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