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參數資料
| 型號： | AD7709BRU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LGE Kit Series; Functions: Continuous light; Rated Voltage: 120V AC; Style: Power Unit; Diameter: 100; Applicable Model: LGE |
| 中文描述： | 4-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO24 |
| 封裝： | PLASTIC, MO-153AD, TSSOP-24 |
| 文件頁數： | 10/17頁 |
| 文件大小： | 248K |
| 代理商： | AD7709BRU |
AD7709
–10–
REV. PrA J anuary 2001
PRELIMINARY TECHNICAL DATA
A D C C IR C UIT INF OR MA T ION
Overview
T he AD7709 incorporates an analog multiplexer with a Sigma-Delta ADC, on-chip programmable gain amplifier and
digital filtering intended for the measurement of wide dynamic range, low frequency signals such as those in weigh-scale,
strain-gauge, pressure transducer or temperature measurement applications. T he AD7709 offers 16-bit resolution. T he
AD7709 can be configured as 2 fully differential input channels or as 4 pseudo differential input channels referenced to
AINCOM. T he channel is buffered and can be programmed for one of 8 input ranges from +20mV to +2.56V. Buffering
the input channel means that the part can handle significant source impedances on the analog input and that R, C
filtering (for noise rejection or RFI reduction) can be placed on the analog inputs if required. T hese input channels are
intended to convert signals directly from sensors without the need for external signal conditioning. Other functions
contained on-chip that augment the operation of the ADC include software configurable current sources, switchable
reference inputs and low side power switches.
T he ADC employs a sigma-delta conversion technique to realize up to 16-bits of no missing codes performance. T he
sigma-delta modulator converts the sampled input signal into a digital pulse train whose duty cycle contains the digital
information. A Sinc
3
programmable low pass filter is then employed to decimate the modulator output data stream to
give a valid data conversion result at programmable output rates from 5.35Hz (186.77mS) to 105.03Hz (9.52mS). A
Chopping scheme is also employed to minimize ADC channel offset errors. A block diagram of the ADC input channel
is shown in Figure 3 below.
1
8
SF
×
3
Digital
Output
Sinc
3
Filter
A
in
+ V
os
A
in
- V
os
chop
f
adc
f
1
2
--
SF)
×
×
XOR
∑
∑
(
)
(8
3
S-D
Analog
Input
Buffer
PGA
f
chop
f
in
f
mod
Mux
MOD0
Figure 3. AD7709 ADC Channel Block Diagram
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| AD7709 | 16-Bit Sigma Delta ADC with Current Sources, Switchable Reference Inputs and I/O Port |
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| AD7712AN | LC2MOS Signal Conditioning ADC |
| AD7712AQ | LC2MOS Signal Conditioning ADC |
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| AD7709BRU-REEL7 | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 105sps 16-bit Serial 24-Pin TSSOP T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 0.105KSPS 16BIT SERL 24TSSOP - Tape and Reel |
| AD7709BRUZ | 功能描述:IC ADC 16BIT SIGMA-DELTA 24TSSOP 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:microPOWER™ 位數:8 采樣率（每秒）:1M 數據接口:串行，SPI? 轉換器數目:1 功率耗散（最大）:- 電壓電源:模擬和數字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數目和類型:8 個單端，單極 產品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7709BRUZ | 制造商:Analog Devices 功能描述:IC ADC 16-BIT SIGMA DELTA |
| AD7709BRUZ-REEL | 功能描述:IC ADC 16BIT SIGMA-DELTA 24TSSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率（每秒）:45k 數據接口:串行 轉換器數目:2 功率耗散（最大）:315mW 電壓電源:模擬和數字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數目和類型:2 個單端，單極 |
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