AD421BRRL7: Loop-Powered 4-20 mA DAC SOIC-16封装
The AD421 is a complete, loop-powered, digital to 4-20 mA converter, designed to meet the needs of smart transmitter manufacturers in the Industrial Control industry. It provides a high precision, fully integrated, low cost solution in a compact 16-pin package. The AD421 is ideal for extending the resolution of smart 4-20 mA transmitters at very low cost.
The AD421 includes a selectable regulator that is used to power itself and other devices in the transmitter. This regulator provides either a +5 V, +3.3 V or +3 V regulated output voltage. The part also contains +1.25 V and +2.5 V precision references. The AD421 thus eliminates the need for a discrete regulator and voltage reference. The only external components required are a number of passive components and a pass transistor to span large loop voltages.
The AD421 can be used with standard HART FSK protocol communication circuitry without any degradation in specified performance. The high speed serial interface is capable of operating at 10 Mbps and allows for simple connection to commonly-used microprocessors and microcontrollers via a standard three-wire serial interface.
The sigma-delta architecture of the DAC guarantees 16-bit monotonicity while the integral nonlinearity for the AD421 is ±0.01%. The part provides a zero scale 4 mA output current with ±0.1% offset error and a 20 mA full-scale output current with ±0.2% gain error.
The AD421 is available in a 16-pin, 0.3 inch-wide, plastic DIP and a 16-lead, 0.3 inch-wide, SOIC package. The part is specified over the industrial temperature range of -40°C to +85°C.
AD421BRRL7 特点
- 4mA to 20 mA Current Output
- HART@ Compatible
- 16-Bit Resolution and Monotonicity
- ±0.01% Integral Nonlinearity
- 5 V or 3 V Regulator Output
- 2.5 V and 1.25 V Precision Reference
- 750 µA Quiescent Current max
- Programmable Alarm Current Capability
- Flexible High Speed Serial Interface
- 16-Lead SOIC and PDIP Packages
AD421BRRL7 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD421BN | 量产 | 16 ld PDIP | 16 | 工业 |
| AD421BNZ | 量产 | 16 ld PDIP | 16 | 工业 |
| AD421BR | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
| AD421BRRL | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
| AD421BRRL7 | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
| AD421BRZ | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
| AD421BRZRL | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
| AD421BRZRL7 | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
AD421BRRL7 应用技术支持与电子电路设计开发资源下载
- AD421 数据手册DataSheet 下载 . pdf
- ADI 模拟器件公司比较器产品选型指南 . pdf
- Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf
