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參數(shù)資料
型號(hào)： AD7194BCPZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 24/57頁(yè)
文件大小： 0K
描述： IC ADC 24BIT SPI 4.8K 32-LFCSP
產(chǎn)品培訓(xùn)模塊： Weigh Scale Introduction
標(biāo)準(zhǔn)包裝： 1
位數(shù)： 24
采樣率（每秒）： 4.8k
數(shù)據(jù)接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 105°C
安裝類型： 表面貼裝
封裝/外殼： 32-WFQFN 裸露焊盤，CSP
供應(yīng)商設(shè)備封裝： 32-LFCSP-WQ（5x5）
包裝： 管件
輸入數(shù)目和類型： 8 個(gè)差分，單極；8 個(gè)差分，雙極；16 個(gè)偽差分，單極；16 偽差分，雙極
產(chǎn)品目錄頁(yè)面： 777 (CN2011-ZH PDF)
其它名稱： AD7194BRUZ
AD7194BRUZ-ND
Data Sheet
AD7194
Rev. A | Page 29 of 56
ADC CIRCUIT INFORMATION
08566-
021
DVDD
DGND
REFIN1(+)
REFIN1(–)
AIN1/P3
AIN2/P2
AIN3/P1/REFIN2(+)
AIN4/P0/REFIN2(–)
AINCOM
AD7194
SERIAL
INTERFACE
AND
CONTROL
LOGIC
REFERENCE
DETECT
TEMP
SENSOR
DOUT/RDY
DIN
SCLK
CS
MCLK1 MCLK2
CLOCK
CIRCUITRY
AVDD
AGND
AIN5
AIN16
Σ-Δ
ADC
PGA
MUX
VDD
AGND
Figure 21. Basic Connection Diagram
OVERVIEW
The AD7194 is an ultralow noise ADC that incorporates a
sigma-delta (Σ-Δ) modulator, a buffer, PGA, and on-chip digital
filtering intended for the measurement of wide dynamic range
signals such as those in pressure transducers, weigh scales, and
strain gage applications. Figure 21 shows the basic connections
required to operate the part.
Analog Inputs
The device can be configured to have eight differential or sixteen
pseudo differential analog inputs. The analog inputs can be
buffered or unbuffered. The AD7194 uses flexible multiplexing,
thus any analog input pin can be selected as a positive input
and any analog input pin can be selected as a negative input.
Multiplexer
The on-chip multiplexer increases the channel count of the
device. Because the multiplexer is included on chip, any channel
changes are synchronized with the conversion process.
PGA
The analog input signal can be amplified using the PGA. The
PGA allows gains of 1, 8, 16, 32, 64, and 128.
Reference Detect
The AD7194 is capable of monitoring the external reference. If
the reference is not present, a flag is set in the status register of
the device.
Burnout Currents
Two 500 nA burnout currents are included on-chip to detect
the presence of the external sensor.
Σ-Δ ADC and Filter
The AD7194 contains a fourth-order Σ-Δ modulator followed
by a digital filter.
The device has several filter options:
Sinc4
Sinc3
Chop enabled/disabled
Fast settling
Zero latency
Serial Interface
The AD7194 has a 4-wire SPI. The on-chip registers are
accessed via the serial interface.
Clock
The AD7194 has an internal 4.92 MHz clock. Either this clock
or an external clock can be used as the clock source to the AD7194.
The internal clock can also be made available on a pin if a clock
source is required for external circuitry.
Temperature Sensor
The on-chip temperature sensor monitors the die temperature.
Digital Outputs
The AD7194 has four general-purpose digital outputs. These
can be used for driving external circuitry. For example, an
external multiplexer can be controlled by these outputs.
Calibration
Both internal and system calibration are included on chip;
therefore, the user has the option of removing offset/gain errors
internal to the AD7194 only, or removing the offset/gain errors
of the complete end system.
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AD7194BCPZ-REEL 功能描述:IC ADC 24BIT SPI 4.8KHZ 32LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)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(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
AD7194BCPZ-REEL7 功能描述:IC ADC 24BIT SPI 4.8KHZ 32LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)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(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
AD7195 制造商:AD 制造商全稱:Analog Devices 功能描述:4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
AD7195BCPZ 功能描述:IC AFE 24BIT 4.8K 32LFSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模擬前端 (AFE) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):- 通道數(shù):2 功率（瓦特）:- 電壓 - 電源，模擬:3 V ~ 3.6 V 電壓 - 電源，數(shù)字:3 V ~ 3.6 V 封裝/外殼:32-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:32-QFN（5x5） 包裝:帶卷 (TR)
AD7195BCPZ 制造商:Analog Devices 功能描述:IC ADC 24BIT 4.8KSPS CSP-32
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