参数资料
| 型号： | AD7719BRZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/40页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 24BIT DUAL 28SOIC |
| 标准包装： | 27 |
| 位数： | 16/24 |
| 采样率（每秒）： | 105 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 2 |
| 功率耗散（最大）： | 4.5mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
| 输入数目和类型： | 3 个差分，单极；3 个差分，双极 |
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a
AD7719
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
2003 Analog Devices, Inc. All rights reserved.
REV. A
Low Voltage, Low Power,
Factory-Calibrated 16-/24-Bit Dual - ADC
FEATURES
HIGH RESOLUTION
-
ADCs
2 Independent ADCs (16- and 24-Bit Resolution)
Factory-Calibrated (Field Calibration Not Required)
Output Settles in 1 Conversion Cycle (Single
Conversion Mode)
Programmable Gain Front End
Simultaneous Sampling and Conversion of 2
Signal Sources
Separate Reference Inputs for Each Channel
Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz
Update Rate
ISOURCE Select
24-Bit No Missing Codes—Main ADC
13-Bit p-p Resolution @ 20 Hz, 20 mV Range
18-Bit p-p Resolution @ 20 Hz, 2.56 V Range
INTERFACE
3-Wire Serial
SPI, QSPI, MICROWIRE, and DSP Compatible
Schmitt Trigger on SCLK
POWER
Specified for Single 3 V and 5 V Operation
Normal: 1.5 mA Typ @ 3 V
Power-Down: 10
A (32 kHz Crystal Running)
ON-CHIP FUNCTIONS
Rail-Rail Input Buffer and PGA
4-Bit Digital I/O Port
On-Chip Temperature Sensor
Dual Switchable Excitation Current Sources
Low-Side Power Switches
Reference Detect Circuit
APPLICATIONS
Sensor Measurement
Temperature Measurement
Pressure Measurement
Weigh Scales
Portable Instrumentation
4 to 20 mA Transmitters
GENERAL DESCRIPTION
The AD7719 is a complete analog front end for low frequency
measurement applications. It contains two high resolution
Σ-
ADCs, switchable matched excitation current sources, low-side
power switches, digital I/O port, and temperature sensor. The
24-bit main channel with PGA accepts fully differential, unipolar,
and bipolar input signal ranges from 1.024
× REFIN1/128 to
1.024
× REFIN1. Signals can be converted directly from a trans-
ducer without the need for signal conditioning. The 16-bit auxiliary
channel has an input signal range of REFIN2 or REFIN2/2.
The device operates from a 32 kHz crystal with an on-chip
PLL generating the required internal operating frequency. The
output data rate from the part is software programmable. The
peak-to-peak resolution from the part varies with the programmed
gain and output data rate.
The part operates from a single 3 V or 5 V supply. When oper-
ating from 3 V supplies, the power dissipation for the part is
4.5 mW with both ADCs enabled and 2.85 mW with only the
main ADC enabled in unbuffered mode. The AD7719 is housed
in 28-lead SOIC and TSSOP packages.
FUNCTIONAL BLOCK DIAGRAM
MUX
AVDD
IEXC1
200 A
IEXC2
200 A
AVDD
AGND
BUF
PGA
MUX1
TEMP
SENSOR
I/O PORT
AVDD
MAIN CHANNEL
24-BIT
-
ADC
AUXILIARY CHANNEL
16-BIT
-
ADC
REFERENCE
DETECT
OSC. AND
PLL
SERIAL
INTERFACE
AND
CONTROL
LOGIC
DVDD
DGND
IOUT1
IOUT2
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AVDD
AGND
REFIN2
PWRGND
P1/SW1 P2/SW2 P3
P4
DOUT
DIN
SCLK
CS
RDY
RESET
XTAL1
XTAL2
REFIN1(+)
REFIN1(–)
AD7719
MUX2
相关PDF资料 |
PDF描述 |
|---|---|
| AD7720BRU | IC MODULATOR SIGMA-DELTA 28TSSOP |
| AD7721AR | IC ADC 16BIT SIGMA-DELTA 28-SOIC |
| AD7722ASZ | IC ADC 16BIT 195KSPS 44-MQFP |
| AD7723BSZ-REEL | IC ADC 16BIT SIGMA-DELTA 44MQFP |
| AD7725BSZ | IC ADC 16BIT PROG 44MQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7720 | 制造商:AD 制造商全称:Analog Devices 功能描述:CMOS Sigma-Delta Modulator |
| AD7720BRU | 功能描述:IC MODULATOR SIGMA-DELTA 28TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
| AD7720BRU-REEL | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 25Msps 16-bit Serial 28-Pin TSSOP T/R |
| AD7720BRU-REEL7 | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 25Msps 16-bit Serial 28-Pin TSSOP T/R 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| AD7720BRUZ | 功能描述:IC MODULATOR SIGMA-DELTA 28TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
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