参数资料
| 型号： | AD7730BN |
| 厂商： | Analog Devices Inc |
| 文件页数： | 39/53页 |
| 文件大小： | 0K |
| 描述： | IC ADC TRANSDUCER BRIDGE 24-DIP |
| 产品变化通告： | AD7730BN Discontinuation 08/Jun/2012 |
| 标准包装： | 15 |
| 位数： | 24 |
| 通道数： | 1 |
| 功率（瓦特）： | 125mW |
| 电压 - 电源，模拟： | 4.75 V ~ 5.25 V |
| 电压 - 电源，数字： | 2.7 V ~ 5.25 V |
| 封装/外壳： | 24-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 24-PDIP |
| 包装： | 管件 |
| 配用： | EVAL-AD7730LEBZ-ND - BOARD EVALUATION FOR AD7730 EVAL-AD7730EBZ-ND - BOARD EVAL FOR AD7730 |
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LOW POWER
BRIDGE TRANSDUCER ADC
KEY FEATURES
Resolution of 110,000 Counts (Peak-to-Peak)
Power Consumption: 15 mW typ
Offset Drift: < 1 ppm/ C
Gain Drift: 3 ppm/ C
Line Frequency Rejection: >150 dB
Buffered Differential Inputs
Programmable Filter Cutoffs
Specified for Drift Over Time
Operates with Reference Voltages of 1 V to 5 V
ADDITIONAL FEATURES
Two-Channel Programmable Gain Front End
On-Chip DAC for Offset/TARE Removal
FASTStep Mode
AC or DC Excitation
Single Supply Operation
APPLICATIONS
Portable Weigh Scales
FUNCTIONAL BLOCK DIAGRAM
*
Protected by U.S. Patent No: 5, 134, 401. Other Patent Applications Filed.
a
APPENDIX–AD7730L*
–44–
GENERAL DESCRIPTION
The AD7730L is a complete low power analog front-end for
weigh-scale and pressure measurement applications. The device
accepts low level signals directly from a transducer and outputs
a serial digital word. The input signal is applied to a proprietary
programmable gain front end based around an analog modula-
tor. The modulator output is processed by a low pass program-
mable digital filter, allowing adjustment of filter cutoff, output
rate and settling-time.
The part features two buffered differential programmable gain
analog inputs as well as a differential reference input. The part
operates from a single +5 V supply and typically consumes less
than 3 mA. It accepts four unipolar analog input ranges: 0 mV
to +10 mV, +20 mV, +40 mV and +80 mV and four bipolar
ranges
±10 mV, ±20 mV, ±40 mV and ±80 mV. The peak-to-
peak resolution achievable directly from the part is 1 in 110,000
counts. An on-chip 6-bit DAC allows the removal of TARE
voltages. Clock signals for synchronizing ac excitation of the
bridge are also provided.
The serial interface on the part can be configured for three-wire
operation and is compatible with microcontrollers and digital
signal processors. The AD7730L contains self-calibration and
system calibration options and features an offset drift of less
than 5 nV/
°C and a gain drift of less than 3 ppm/°C.
The part is available in a 24-lead SOIC and 24-lead TSSOP
package.
SIGMA-
DELTA
MODULATOR
AD7730L
6-BIT
DAC
SERIAL INTERFACE
AND CONTROL LOGIC
REGISTER BANK
CLOCK
GENERATION
PROGRAMMABLE
DIGITAL
FILTER
SIGMA-DELTA A/D CONVERTER
BUFFER
PGA
100nA
AGND
100nA
AVDD
VBIAS
AIN1(+)
AIN1(–)
AIN2(+)/D1
AIN2(–)/D0
ACX
STANDBY
SYNC
MCLK IN
MCLK OUT
SCLK
CS
DIN
DOUT
RESET
RDY
POL
DGND
AGND
AVDD
DVDD
REF IN(–) REF IN(+)
MUX
REFERENCE DETECT
AC
EXCITATION
CLOCK
+
–
REV. B
相关PDF资料 |
PDF描述 |
|---|---|
| AD7731BN | IC ADC 24BIT SIGMA-DELTA 24-DIP |
| AD7732BRU | IC ADC 24BIT 2-CH 28-TSSOP |
| AD7734BRU | IC ADC 24BIT 4-CH 28-TSSOP |
| AD7738BRU | IC ADC 24BIT 8-CH 28-TSSOP |
| AD7739BRU | IC ADC 24BIT 8-CH 24-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7730BNZ | 功能描述:IC ADC TRANSDUCER BRIDGE 24-DIP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模拟前端 (AFE) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:- 通道数:2 功率（瓦特）:- 电压 - 电源，模拟:3 V ~ 3.6 V 电压 - 电源，数字:3 V ~ 3.6 V 封装/外壳:32-VFQFN 裸露焊盘 供应商设备封装:32-QFN（5x5） 包装:带卷 (TR) |
| AD7730BR | 功能描述:IC ADC BRIDGE TRANSDUCER 24-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模拟前端 (AFE) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:- 通道数:2 功率（瓦特）:- 电压 - 电源，模拟:3 V ~ 3.6 V 电压 - 电源，数字:3 V ~ 3.6 V 封装/外壳:32-VFQFN 裸露焊盘 供应商设备封装:32-QFN（5x5） 包装:带卷 (TR) |
| AD7730BR-REEL | 功能描述:IC ADC TRANSDUCER BRIDGE 24-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模拟前端 (AFE) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:- 通道数:2 功率（瓦特）:- 电压 - 电源，模拟:3 V ~ 3.6 V 电压 - 电源，数字:3 V ~ 3.6 V 封装/外壳:32-VFQFN 裸露焊盘 供应商设备封装:32-QFN（5x5） 包装:带卷 (TR) |
| AD7730BR-REEL7 | 功能描述:IC ADC TRANSDUCER BRIDGE 24-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模拟前端 (AFE) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:- 通道数:2 功率（瓦特）:- 电压 - 电源，模拟:3 V ~ 3.6 V 电压 - 电源，数字:3 V ~ 3.6 V 封装/外壳:32-VFQFN 裸露焊盘 供应商设备封装:32-QFN（5x5） 包装:带卷 (TR) |
| AD7730BRU | 功能描述:IC ADC BRIDGE TRANSDUCER 24TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模拟前端 (AFE) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:- 通道数:2 功率（瓦特）:- 电压 - 电源，模拟:3 V ~ 3.6 V 电压 - 电源，数字:3 V ~ 3.6 V 封装/外壳:32-VFQFN 裸露焊盘 供应商设备封装:32-QFN（5x5） 包装:带卷 (TR) |
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