AD7678AST:18位、100 kSPS PulSAR® ADC
AD7678是一款18位、100 kSPS、电荷再分配SAR型、全差分模数转换器（ADC）,采用5 V单电源供电。该器件内置一个18位高速采样ADC、一个内部转换时钟、一个内部基准电压缓冲、纠错电路,以及串行和并行系统接口。
AD7678经过出厂硬件校准和全面测试,可确保除一般直流参数（增益、偏置和线性度）之外,诸如信噪比（SNR）和总谐波失真（THD）等交流参数也合乎要求。
该器件使用ADI公司的0.6微米高性能CMOS工艺制造,采用48引脚LQFP或48引脚LFCSP封装,工作温度范围为-40°C至+85°C。
The AD7678 is a 18-bit, 100 kSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 5 V power supply. The part contains a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports.
The AD7678 is hardware factory calibrated and is comprehensively tested to ensure such ac parameters as signal-to-noise ratio (SNR) and total harmonic distortion (THD), in addition to the more traditional dc parameters of gain, offset, and linearity.
It is fabricated using Analog Devices’ high-performance, 0.6 micron CMOS process and is available in a 48-lead LQFP or a 48-lead LFCSP with operation specified from –40°C to +85°C.
AD7678AST 特点
- 18位分辨率、无失码
- 无流水线延迟（SAR架构）
- 差分输入范围：5 V
- 吞吐量：100 kSPS
- 积分非线性（INL）：最大值±2.5 LSB（满量程的±9.5 ppm）
- 动态范围：典型值102 dB
- S/（N+D）：典型值100 dB（10 kHz时）
- 总谐波失真（THD）：典型值-115 dB （10 kHz时）
- 并行（18位、16位或8位总线）
和串行5 V/3 V接口 - 片内基准电压缓冲
- 采用5 V单电源供电
- 功耗：
15 mW（100 kSPS时）
使用内部缓冲时典型值为20 mW - 18 Bits Resolution with No Missing Codes
- No Pipeline Delay (SAR architecture)
- Differential Input Range: 5 V
- Throughput: 100 kSPS
- INL: ±2.5 LSB Max (±9.5 ppm of Full-Scale)
- Dynamic Range : 102 dB Typ
- S/(N+D): 100 dB Typ @ 10 kHz
- THD: –115 dB Typ @ 10 kHz
- Parallel (18, 16 or 8 bits bus) and Serial 5 V/3 V Interface
- On-board Reference Buffer
- Single 5 V Supply Operation
- Power Dissipation:
- 15 mW @ 100 kSPS
- 20 mW Typ with internal buffer
AD7678AST 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7678ACP | Prodn | 48 ld LFCSP 7x7mm (5.25EP) | 48 | 工业 |
| AD7678ACPRL | Prodn | 48 ld LFCSP 7x7mm (5.25EP) | 48 | 工业 |
| AD7678ACPZ | Prodn | 48 ld LFCSP 7x7mm (5.25EP) | 48 | 工业 |
| AD7678ACPZRL | Prodn | 48 ld LFCSP 7x7mm (5.25EP) | 48 | 工业 |
| AD7678AST | Prodn | 48 ld LQFP | 48 | 工业 |
| AD7678ASTRL | Prodn | 48 ld LQFP | 48 | 工业 |
| AD7678ASTZ | Prodn | 48 ld LQFP | 48 | 工业 |
| AD7678ASTZRL | Prodn | 48 ld LQFP | 48 | 工业 |
| EVAL-AD7678CB | Prodn | Evaluation Boards | - | 工业 |
| EVAL-AD7678CBZ | Prodn | EVALUATION BOARDS | - | 工业 |
AD7678AST 应用技术支持与电子电路设计开发资源下载
- AD7678 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
