ADSP-21990BST - 160 MHz Mixed-Signal DSP | Analog Devices
料号： ADSP-21990BST ✓ 量产中ADSP-21990BST 概述
A mixed-signal DSP controller is a semiconductor that combines a digital signal processor with analog-to-digital conversion and supporting control interfaces. It belongs to the DSP processor hierarchy and executes real-time algorithms across digital signal processing, embedded control, and industrial motor-control systems. By placing the ADC and DSP core in one device, designers can reduce component count and avoid transferring large volumes of sampled data between separate converters and processors.
The ADSP-21990BST provides eight ADC channels with 14-bit resolution and a maximum sampling rate of 20 MSPS. Its 160 MHz DSP core uses a 16-bit fixed-point architecture optimized for deterministic control loops and signal-processing workloads. The core and I/O rails operate from 2.5 V and 3.3 V respectively, allowing the controller to interface with conventional 3.3 V external circuitry while maintaining a dedicated core supply. The operating-temperature listing extends to -55 °C for this ordered variant.
The ADSP-219x architecture uses a modified Harvard organization, separating instruction and data paths to improve execution efficiency. Two sample-and-hold amplifiers support simultaneous sampling, which is useful when phase-aligned measurements are required. Together, the ADC throughput, processor clock, and integrated conversion function support deterministic sampling and calculation without requiring an external high-speed ADC on the signal path.
Typical applications include industrial motor control, industrial automation, condition monitoring, communications signal processing, and embedded control systems that require multiple high-speed analog inputs. Simultaneous sampling is particularly relevant to phased measurement, vibration analysis, closed-loop motor control, and power-conversion systems where comparing multiple sensor channels at the same instant improves measurement integrity.
When designing around the ADSP-21990BST, account for the separate 2.5 V core and 3.3 V I/O supplies, place the ADC and core supply decoupling capacitors close to their respective pins, and use the ADSP-2199x Hardware Reference for the complete pin description and bus configuration. Confirm signal levels, clocking, memory requirements, and thermal performance against the manufacturer datasheet before releasing the PCB layout.
This page consolidates the manufacturer's core architecture, mixed-signal specifications, package information, replacement analysis, and application-specific design guidance into one engineering-focused reference. It also highlights where the ADSP-21990BSTZ ordering variant offers the closest same-package path for designs that can use that suffix.
直接替换替代料： ADSP-21990BST ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADSP-21990BST （相同外形与封装尺寸） ——差异在于 ADC Resolution, DSP Core, Package.
ADSP-21990BSTZ
✅ 直接替换📋 参考替代料（不在目录中）
ADSP-21990BST 规格参数
| Device Type | Mixed-Signal DSP Controller |
| DSP Core | ADSP-219x |
| DSP Core Clock Frequency | 160 MHz |
| DSP Word Length | 16 bit |
| DSP Arithmetic | Fixed Point |
| ADC Channel Count | 8 channels |
| ADC Resolution | 14 bit |
| ADC Sampling Rate | 20 MSPS |
| Sample-and-Hold Amplifier Count | 2 |
| Simultaneous Sampling | Supported by dual sample-and-hold amplifiers |
| Core Supply Voltage | 2.50 V |
| I/O Supply Voltage | 3.30 V |
| 工作温度 | -55 °C |
| 封装 | 176-LQFP |
| 引脚数量 | 176 pins |
| 安装类型 | Surface Mount |
ADSP-21990BST 176-lqfp 引脚配置指南
ADSP-21990BST（176-lqfp 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： ADSP-21990BST.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADSP-21990BST 适用于 6 应用s: Industrial Motor Control, Industrial Condition Monitoring, Power Conversion Control, Communications Signal Processing, Industrial Automation, Precision Multi-Channel Acquisition.
Industrial Motor Control
The ADSP-21990BST fits closed-loop industrial motor-control systems that require rapid sensor acquisition and deterministic control calculations. Its 160 MHz, 16-bit fixed-point DSP core can execute motor-control algorithms, while the integrated eight-channel, 14-bit ADC samples at up to 20 MSPS without requiring a separate converter at the analog input stage. The 176-LQFP package also provides a substantial pin count for control signals, communications, and external memory interfaces. When current sensing, position feedback, and voltage feedback must be evaluated together, dual sample-and-hold amplifiers can support coherent measurements. Designers should size the power rails and keep the ADC and core supplies well decoupled according to the ADSP-2199x Hardware Reference.
推荐
Industrial Condition Monitoring
The ADSP-21990BST is appropriate for vibration, current, and position-monitoring systems that combine high-rate conversion with real-time signal processing. The eight-channel 14-bit ADC supports acquisition at up to 20 MSPS, while the 160 MHz DSP core performs filtering, spectral analysis, feature extraction, and threshold evaluation without transferring every sample to a host processor. Simultaneous sampling through the two sample-and-hold amplifiers is valuable when phase relationships between channels carry diagnostic information. A robust implementation should protect analog inputs from transients, preserve signal-to-noise performance through careful grounding, and follow the manufacturer's recommended reference, clock, and decoupling layouts.
推荐
Power Conversion Control
The ADSP-21990BST can serve as the digital controller in high-performance power-conversion systems where several analog feedback signals must be sampled quickly. Its 20 MSPS, eight-channel ADC reduces the need for separate converters, and the 160 MHz fixed-point DSP core supports proportional-integral control, modulation, compensation, and supervisory logic. Simultaneous sampling improves the consistency of measurements used in multi-loop control, especially where timing offsets would otherwise distort calculated phase or magnitude. The controller should use separate routing for sensitive analog and digital returns, while the 2.50 V core and 3.30 V I/O rails require verified sequencing and adequate local bypassing.
推荐
Communications Signal Processing
The ADSP-21990BST is suitable for embedded communications and waveform-processing designs that require deterministic real-time computation close to the analog input. Its 160 MHz 16-bit DSP core handles fixed-point filtering and modulation functions, while the eight-channel ADC can acquire multiple baseband or diagnostic signals at up to 20 MSPS. Integrating conversion and processing reduces serial data-transfer overhead and helps minimize the latency between acquisition and control. For communications designs, engineers should establish the required sample rate, anti-aliasing filtering, clock-jitter budget, and synchronization method before finalizing the analog front end and PCB layout.
推荐
Industrial Automation
The ADSP-21990BST combines the real-time execution of a 16-bit DSP with eight integrated ADC channels, making it appropriate for industrial automation modules that monitor and control several analog process variables. The 20 MSPS conversion capability supports fast feedback loops, while the fixed-point core provides repeatable arithmetic for filtering, calibration, and compensation. The 176-LQFP package offers enough connectivity for field-bus, digital I/O, and external memory functions in a compact embedded design. A production design should separate analog and digital return paths, validate input protection against industrial transients, and verify thermal performance across the required ambient-temperature range.
推荐
Precision Multi-Channel Acquisition
The ADSP-21990BST fits precision multi-channel measurement systems where channel timing and compact converter integration are important. Its eight 14-bit ADC channels operate at up to 20 MSPS, and the dual sample-and-hold amplifiers permit simultaneous acquisition where comparing phase-aligned signals is required. The 160 MHz DSP core can perform scaling, filtering, calibration, and real-time analysis immediately after conversion. For instrumentation designs, verify the input-range and full-scale calibration plan, use a low-noise reference strategy, and implement the manufacturer layout recommendations to avoid degrading the converter's noise performance and channel matching.
推荐
推荐产品汇总
工程参考数据： ADSP-21990BST ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADSP-21990BSTZ |
|---|---|---|
| Package | 176-LQFP | 176-LQFP |
| Brand | Analog Devices | Analog Devices |
| DSP Core | ADSP-219x | ADSP-219x |
关键差异点
- Integrated eight-channel high-speed ADC （对比 ADSP-BF512BSWZ-4)
- Dedicated fixed-point DSP execution （对比 ADSP-BF512BSWZ-4)
- Closest same-family package option （对比 ADSP-21990BSTZ)
设计说明
Provide and decouple the 2.50 V core and 3.30 V I/O rails independently according to the ADSP-2199x Hardware Reference. Place each rail's high-frequency bypass capacitor close to the relevant supply pins and confirm regulator stability against the converter's input and output impedance. Maintain the required startup relationship between rails and ensure external analog and digital loads do not create return current through the ADC reference or input network.
Route analog inputs as short, guarded traces with a continuous ground reference, and keep switching nodes, high-current outputs, and digital clocks away from ADC inputs. Use the manufacturer's pin-description table when assigning all 176 package positions and preserve the documented exposed-pad and thermal-land requirements. PCB signal-integrity checks should include return-path continuity, clock jitter, simultaneous-switching noise, and isolation between the 2.50 V and 3.30 V domains.
Treat the 20 MSPS ADC bandwidth as a complete mixed-signal design constraint, not only an IC specification. Define the analog input range, anti-alias filtering, source impedance, and sampling-clock arrangement before component selection. Because simultaneous sampling depends on the dual sample-and-hold paths, preserve matched routing and timing when phase relationships between channels are important. Validate noise, channel matching, and clock-jitter performance on the assembled PCB.
Do not treat the ADSP-BF512BSWZ-4 as a direct substitute for the ADSP-21990BST: the processor generations, architectures, clocks, memory configurations, packages, and peripheral integration differ. Likewise, confirm the exact ordering suffix before using ADSP-21990BSTZ as a replacement. Validate the complete pin list, supply rails, clock requirements, ADC behavior, memory interfaces, and package drawing against the manufacturer documentation before production release.
合规信息
The available product information does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The -55 °C operating-temperature listing does not by itself establish AEC-Q100 qualification.
