AD7984: 18-Bit,采样速率1.33 MSPS 的PulSAR型ADC,功耗为10.5 mW,采用MSOP/QFN封装
AD7984是一款18-bit、逐次逼近型模数转换器,采用单电源供电。它包含低功耗、高速、18-bit采样模数转换器以及一个多功能串行接口端口。在CNV上升沿,它对IN+和IN-引脚之间的电压差进行采样。这两个引脚上的电压通常在0V和VREF. 之间以相反相位摆动。参考电压(REF)是从外部施加的,并且可以独立于电源VDD设置。
SPI兼容串行接口还具有利用SDI输入将几个ADC以菊花链形式串联到单个三线式总线上的能力,并提供可选的忙指示。采用独立VIO电源,能兼容1.8V、2.5V、3V和5V逻辑。AD7984采用10引脚MSOP或10引脚QFN(LFCSP)封装,工作温度范围为−40°C至+85°C。
AD7984 特点
- 18-bit resolution with no missing codes
- Throughput: 1.33 MSPS
- Low power dissipation: 10.5 mW at 1.33 MSPS
- INL: ±2.25 LSB maximum
- Dynamic range: 99.7 dB typical
- True differential analog input range: ±VREF 0 V to VREF
with VREF between 2.9 V to 5.0 V
Allows use of any input range
Easy to drive with the ADA4941
- No pipeline delay
- Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
- Serial interface SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
- Ability to daisy-chain multiple ADCs and busy indicator
- 10-lead MSOP (MSOP-8 size) and 10-lead 3 mm × 3 mm QFN (LFCSP), SOT-23 size
AD7984 技术指标
- Resolution (Bits): 18bit
- # Chan: 1
- Sample Rate: 1.33MSPS
- Interface: Ser,SPI
- Analog Input Type: Diff-Uni
- Ain Range: (2Vref) p-p
- ADC Architecture: SAR
- Pkg Type: CSP,SOP
AD7984 应用领域
- 电池供电设备
- 数据采集系统
- 医疗器械
- 地震数据采集系统
AD7984 建议配套产品
- Recommended Driver Amplifiers for the AD7984
- For low noise, low power single-to-differential driver amplifier, we recommend the ADA4941-1.
- For low noise, small size and low power, we recommend the ADA4841-1.
- For low noise and high frequency, we recommend the ADA4898-1, AD8045, ADA4899-1 or the AD8021.
- For a fully differential attenuating precision amplifier, we recommend the AD8475.
- For 5V single supply and low noise, we recommend the AD8655.
- Recommended Reference Buffer Amplifiers for the AD7984
- For a low impedance source, we recommend the AD8031 or the AD8605.
- Recommended Precison External References for the AD7984
- For a low noise, high accuracy 3V reference, we suggest the ADR433.
- For a low noise, high accuracy 5V reference, we recommend the ADR435 or the ADR445.
- Recommended Power Solutions
- For selecting voltage regulator products, use ADIsimPower.
- For selecting supervisor products, use the Supervisor Parametric Search.
AD7984 功能框图
AD7984 产品选型
AD7984 应用技术支持与电子电路设计开发资源下载
- AD7984 数据手册DataSheet下载 . pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
- ADC模数转换器选型指南 . pdf