AD7685BRM: 16位、250 kSPS PulSAR® ADC,采用MSOP或QFN封装
AD7685是一款16位、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、短孔径延迟的采样保持电路。在CNV上升沿,该器件对IN+与IN-之间的模拟输入电压差进行采样,范围从0 V至REF。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以菊花链形式连结到单三线式总线上,或提供一个可选的忙闲指示功能。采用独立电源VIO时,该器件与1.8V、2.5V、3V或5V逻辑兼容。AD7685采用10引脚MSOP封装或10引脚QFN（LFCSP）封装,工作温度范围为−40°C至+85°C。
The AD7685 is a 16-bit, charge redistribution successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a 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, short aperture delay, track-and-hold circuit. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage.Power dissipation 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 or 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 AD7685 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) 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（PDA）
- 数据采集
- 仪器仪表
- 过程控制
产品应用领域 Applications
- Battery-powered equipment
- Medical instruments
- Mobile communications
- Personal digital assistants (PDAs)
- Data acquisition
- Instrumentation
- Process controls
AD7685BRM 特点
- 16位分辨率、无失码
- 吞吐量：250 kSPS
- 积分非线性（INL）：典型值±0.6 LSB,最大值±2 LSB（FSR的±0.003%）
- 信纳比（SINAD）：93.5 dB（20 kHz 时）
- 总谐波失真（THD）：−110 dB （ 20 kHz 时）
- 伪差分模拟输入范围：0 V～VREF（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：1.8 V至5 V
- 串行接口： SPI®-/QSPI™-/MICROWIRE™-/DSP-兼容
- 以菊花链形式联接多个ADC、忙闲指示功能
- 功耗：
1.4 μW @ 2.5 V/100 SPS
1.35 mW @ 2.5 V/100 kSPS, 4 mW @ 5 V/100 kSPS - 待机电流：1 nA
- 16-bit resolution with no missing codes
- Throughput: 250 kSPS
- INL: ±0.6 LSB typical, ±2 LSB maximum (±0.003% of FSR)
- SINAD: 93.5 dB @ 20 kHz
- THD: −110 dB @ 20 kHz
- Pseudo differential analog input range 0 V to VREF with VREF up to VDD
- No pipeline delay
- Single-supply operation 2.3 V to 5.5 V with 1.8 V to 5 V logic interface
- Serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
- Daisy-chain multiple ADCs, BUSY indicator
- Power dissipation
1.4 μW @ 2.5 V/100 SPS
1.35 mW @ 2.5 V/100 kSPS, 4 mW @ 5 V/100 kSPS - Standby current: 1 nA
AD7685BRM 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7685ACPZRL | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7685ACPZRL7 | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7685ARM | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685ARMRL7 | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685ARMZ | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685ARMZRL7 | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685BCPZRL | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7685BCPZRL7 | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7685BRM | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685BRMRL7 | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685BRMZ | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685BRMZRL7 | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685CCPZRL | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7685CCPZRL7 | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7685CRM | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685CRMRL7 | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685CRMZ | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7685CRMZRL7 | Prodn | 10 ld MSOP | 10 | 工业 |
| EVAL-AD7685CBZ | Prodn | EVALUATION BOARDS | 10 | 工业 |
AD7685BRM 应用技术支持与电子电路设计开发资源下载
- AD7685 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
