AD7687BRMZ: 16位、250 kSPS、差分PulSAR(R) ADC,采用uSOIC或QFN封装
AD7687是一款16位、250 kSPS、电荷再分配、逐次逼近型模数转换器（ADC）,采用2.3 V至5.5 V单电源（VDD）供电。该器件内置一个极低功耗、高速、16位无失码采样ADC、一个内部转换时钟和一个多功能串行接口端口,还集成了一个低噪声、宽带宽、极短孔径延迟的采样保持电路。在CNV上升沿,该器件对IN+与IN-引脚之间的电压差进行采样。这两个引脚上的电压摆幅通常在0 V至REF之间、相位相反。基准电压（REF）由外部提供,最高可设置为电源电压,功耗和吞吐量呈线性变化关系。
SPI兼容串行接口还能够利用SDI输入,将几个ADC以菊花链形式联结到单根三线式总线上,并提供一个可选的忙闲指示。采用独立电源VIO时,该器件与1.8V、2.5V、3V或5V逻辑兼容。AD7687采用10引脚uSOIC封装或10引脚QFN封装（CSP芯片级封装）,工作温度范围为-40°C至+85°C。
The AD7687 is a 16-bit, 250 kSPS, charge redistribution successive-approximation Analog-to-Digital Converter which operates from a single power supply, VDD between 2.3 V to 5.5 V. It contains a very low power high-speed 16-bit sampling ADC with no missing codes, an internal conversion clock and a versatile serial interface port. The part also contains a low noise, wide bandwidth, very short aperture delay track/hold circuit. On the CNV rising edge, it samples the voltage difference between IN+ and IN- pins. The voltages on these pins usually swing in opposite phase between 0 V to REF. The reference voltage REF is applied externally and can be set up to the supply voltage.Its power scales linearly with throughput.
The SPI compatible serial interface also features the ability, using the SDI input, to “Daisy chain” several ADCs on a single 3 wire bus and provides an optional Busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V or 5 V logic using the separate supply VIO.The AD7687 is housed in a 10-lead uSOIC or 10-lead QFN (Chip Scale package) with operation specified from –40°C to +85°C.
产品应用领域 Applications
- 电池供电设备
- 医疗仪器
- 移动通信
- 个人数字助理
- 数据采集
- 仪器仪表
- 医疗仪器
- 过程控制
产品应用领域 Applications
- Battery Powered Equipment
- Medical instruments
- Mobile communications
- Personal digital assistants
- Data Acquisition
- Instrumentation
- Medical Instruments
- Process Control
AD7687BRMZ 特点
- 16位分辨率、16位无失码
- 吞吐量：250 kSPS
- 积分非线性（INL）：±0.4 LSB（典型值）,±1.5 LSB（最大值）
- S/（N+D）：95 dB（20 kHz 时）
- 功耗：
1.35 mW @ 2.5V/100 kSPS
1.4 uW @ 2.5 V/100 SPS - 真差分模拟输入范围：±VREF 0 V 至 VREF （两个输入脚的VREF最高为VDD）
- 无流水线延迟
- 单电源工作：2.3 V至5.5 V,逻辑接口电压1.8V至5 V
- 多个ADC以菊花链形式连接、且提供忙闲指示功能
- 串行接口：SPI/QSPI/Wire/DSP兼容
- uSOIC封装（uSO8尺寸）和3 mm x 3 mm QFN封装（LFCSP）（SOT23尺寸）
- 与AD7685、AD7686、AD7688引脚兼容
- 16 Bits Resolution with No Missing 16-Bit Codes
- Throughput: 250 kSPS
- INL: ±0.4 LSB Typ, ±1.5 LSB Max
- S/(N+D): 95 dB @ 20 kHz
- Power Dissipation:
1.35 mW @ 2.5V/100 kSPS
1.4 uW @ 2.5 V/100 SPS - True Differential Analog input range: ±VREF 0 V to VREF with VREF up to VDD on Both Inputs
- No Pipeline Delay
- Single Supply Operation 2.3 V to 5.5 V with 1.8V to 5 V Logic Interface
- Multiple ADCs Daisy Chain, with BUSY Indicator
- Serial Interface SPI/QSPI/Wire/DSP compatible
- uSOIC Package (uSO8 Size) and 3 mm by 3 mm QFN (LFCSP) (SOT23 size)
- Pin-to-Pin compatible with the AD7685, AD7686, AD7688
AD7687BRMZ 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7687BCPZRL | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7687BCPZRL7 | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7687BRM | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7687BRMRL7 | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7687BRMZ | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7687BRMZRL7 | Prodn | 10 ld MSOP | 10 | 工业 |
| EVAL-AD7687CBZ | Prodn | EVALUATION BOARDS | 10 | 工业 |
AD7687BRMZ 应用技术支持与电子电路设计开发资源下载
- AD7687 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