AD7690BCPZRL: 18位、1.5 LSB INL、400 kSPS PulSAR® 差分ADC,采用MSOP/QFN封装
AD7690是一款18位、逐次逼近型模数转换器（ADC）,采用单电源（VDD）供电。它内置一个低功耗、高速、18位不失码的采样ADC、一个内部转换时钟和一个多功能串行接口。在CNV上升沿,AD7690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为0 V到REF,相位相反。基准电压（REF）由外部提供,最高可以设置为电源电压。AD7690的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,并提供一个可选的忙闲指示。它采用独立的VIO电源,与1.8V、2.5V、3V或5V逻辑兼容。AD7690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 AD7690 is an 18-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN− pins. The voltages on these pins swing in opposite phase between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage.The power of the AD7690 scales linearly with the 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 VIO supply.The AD7690 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
- 数据采集
- 地震数据采集系统
- DVM
- 仪器仪表
- 医疗仪器
产品应用领域 Applications
- Battery-powered equipment
- Data acquisition
- Seismic data acquisition systems
- DVMs
- Instrumentation
- Medical instruments
AD7690BCPZRL 特点
- 18位分辨率、无失码
- 吞吐量：400 kSPS
- INL：±0.75 LSB（典型值）,±1.5 LSB（最大值）（FSR的±6 ppm）
- 动态范围：102 dB （400 kSPS ）
- 过采样动态范围：125 dB （ 1 kSPS ）
- 无噪声分辨率：20 bits （ 1 kSPS ）
- 有效分辨率： 22.7 bits （1 kSPS ）
- SINAD: 101.5 dB （ 1 kHz）
- THD: −125 dB （1 kHz ）
- 真差分模拟输入范围： ±VREF 0 V ~ VREF ,两个输入上的VREF均可高达VDD
- 无流水线延迟
- 采用5 V单电源供电,含1.8 V/2.5 V/3 V/5 V逻辑接口
- 18-bit resolution with no missing codes
- Throughput: 400 kSPS
- INL: ±0.75 LSB typ, ±1.5 LSB max (±6 ppm of FSR)
- Dynamic range: 102 dB @ 400 kSPS
- Oversampled dynamic range: 125 dB @ 1 kSPS
- Noise-free code resolution: 20 bits @ 1 kSPS
- Effective resolution: 22.7 bits @ 1 kSPS
- SINAD: 101.5 dB @ 1 kHz
- THD: −125 dB @ 1 kHz
- True differential analog input range: ±VREF 0 V to VREF with VREF up to VDD on both inputs
- No pipeline delay
- Single-supply 5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
AD7690BCPZRL 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7690BCPZRL | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7690BCPZRL7 | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7690BRMZ | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7690BRMZ-RL7 | Prodn | 10 ld MSOP | 10 | 工业 |
AD7690BCPZRL 应用技术支持与电子电路设计开发资源下载
- AD7690 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
