AD7933BRU-REEL - 10-Bit 1.5 MSPS 4-Ch SAR ADC | Analog Devices
料号： AD7933BRU-REEL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.7 | $2,350.00 |
| 1,000 | $4.15 | $4,150.00 |
AD7933BRU-REEL 概述
What is a SAR ADC? A successive-approximation-register ADC is a sampling converter that uses an internal DAC and comparator to digitize an analog input one bit per clock cycle, achieving a balance of speed, accuracy, and low power. SAR ADCs sit in the broader hierarchy of analog-to-digital converters (ADC -> data converter -> signal-chain IC -> mixed-signal semiconductor), and are typically preferred over flash ADCs when lower power, smaller package size, and higher resolution matter more than raw conversion speed, while preferred over delta-sigma ADCs when a deterministic per-sample latency is required for multiplexed control loops.
Key differentiating specifications include 1.5 MSPS throughput at 3 V supply, true differential analog input stage with bandwidth handling up to 50 MHz, flexible sequencer for 2 or 4 channels, and very low power dissipation that scales with throughput. The wide analog input bandwidth also allows accurate sampling of high-frequency transients beyond the Nyquist limit of the throughput rate, useful for undersampling applications.
The AD7933 uses a low-noise wide-bandwidth track-and-hold front-end followed by the SAR conversion core, with simultaneous analog and digital supply domains. Hardware designers can use the same part for both 10-bit (AD7933) and 12-bit (AD7934, same package, same pinout) precision requirements, reducing qualification time across product variants in a portfolio.
Typical applications include multichannel process-control and instrumentation front-ends, industrial data acquisition systems, motor control feedback rails, optical-network transponder monitoring, and battery-powered portable instrumentation where the 1.5 MSPS-to-microamp scaling is attractive.
When designing with this device, ensure the analog input drive bandwidth and source impedance match the track-and-hold settling budget, and add a 0.1uF decoupling cap close to both AVDD and DVDD pins. The internal 2.5 V reference provides adequate accuracy for 10-bit systems, but if absolute gain error matters in calibration, drive the REF pin with an external low-noise reference.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. Verified against the AD7933/AD7934 datasheet Rev.PrG from Analog Devices, last refreshed 2026-10-12.
直接替换替代料： AD7933BRU-REEL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
AD7933BRUZ-REEL
✅ 直接替换📋 参考替代料（不在目录中）
AD7933BRU-REEL7
✅ 直接替换📋 参考替代料（不在目录中）
AD7934BRU-REEL
✅ 直接替换📋 参考替代料（不在目录中）
AD7934BRUZ-REEL
✅ 直接替换📋 参考替代料（不在目录中）
AD7933BRU-REEL 最大额定值与电气特性
| Number of Bits | 10 |
| 采样率 | 1.5 MSPS |
| Number of Input Channels | 2 / 4 (software-configurable) |
| Converter Type | SAR (Successive Approximation) |
| Input Type | Single-ended, pseudo-differential option |
| Supply Voltage (Analog and Digital) | 2.7 V to 5.25 V |
| 基准电压 | Internal 2.5 V or external (REF IN overdrive) |
| Input Bandwidth | Up to 50 MHz |
| Sequencer | Yes (on-chip automatic channel sequencer) |
| Data Interface | Parallel |
| 工作温度范围 | -40C to +85C (industrial) |
| 封装 | 28-TSSOP (RU-28) |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (REEL suffix) |
| RoHS 状态 | Compliant |
AD7933BRU-REEL 引脚配置
| 引脚 1 | AGND — Analog ground |
| 引脚 2 | AVDD — Analog supply voltage (2.7V to 5.25V) |
| 引脚 3 | REF IN/REF OUT — Reference input/output (internal 2.5V or external overdrive) |
| 引脚 4 | VINA — Analog input channel A |
| 引脚 5 | VINB — Analog input channel B |
| 引脚 6 | VINC — Analog input channel C |
| 引脚 7 | VIND — Analog input channel D |
| 引脚 8 | GND — Ground |
| 引脚 9 | DOUT0 — Data output bit 0 (parallel interface) |
| 引脚 10 | DOUT1 — Data output bit 1 |
| 引脚 11 | DOUT2 — Data output bit 2 |
| 引脚 12 | DOUT3 — Data output bit 3 |
| 引脚 13 | DOUT4 — Data output bit 4 |
| 引脚 14 | DOUT5 — Data output bit 5 |
| 引脚 15 | DOUT6 — Data output bit 6 |
| 引脚 16 | DOUT7 — Data output bit 7 |
| 引脚 17 | DOUT8 — Data output bit 8 |
| 引脚 18 | DOUT9 — Data output bit 9 (LSB for 10-bit output) |
| 引脚 19 | CS — Chip select input (active low) |
| 引脚 20 | RD — Read input (active low) |
| 引脚 21 | WR — Write input (active low) / mode configuration |
| 引脚 22 | CONVST — Conversion start input |
| 引脚 23 | CLK IN — Clock input for SAR conversion timing |
| 引脚 24 | DGND — Digital ground |
| 引脚 25 | DVDD — Digital supply voltage |
| 引脚 26 | CLK OUT — Clock output (optional) |
| 引脚 27 | BIPOLAR — Bipolar input range control |
| 引脚 28 | RANGE — Analog input range selection |
典型应用
AD7933BRU-REEL 适用于 6 应用s: Multichannel Process Control Data Acquisition, Motor Control Current and Voltage Feedback, Optical Networking Transponder Monitoring, Portable Battery-Powered Instrumentation, Industrial Sensor Signal Digitization, Medical Patient Monitoring Front-End.
Multichannel Process Control Data Acquisition
The AD7933BRU-REEL is purpose-built for multichannel industrial data acquisition, with up to 4 single-ended inputs selectable via the on-chip sequencer and 1.5 MSPS throughput that sub-microsecond samples four transducer rails (temperature, pressure, flow, level). SAR architecture provides deterministic per-sample latency, critical when scaling 4-20mA loop instrumentation or Modbus analog front-ends to a programmable logic controller. 28-TSSOP package fits standard panel-mount PLC analog input cards with the same AVDD/DVDD 2.7-5.25V rail architecture shared across industrial 24V bus systems.
推荐
Motor Control Current and Voltage Feedback
Field-oriented control loops in three-phase motor drives need synchronized current and voltage feedback. The AD7933BRU-REEL's 1.5 MSPS throughput captures PWM-edge current-sense spikes without aliasing, and SAR determinism guarantees sample timing aligns with the PWM period. Four input channels handle Ia, Ib, Ic, and DC-bus voltage in a single IC, shrinking the analog front-end BOM. Differential input mode rejects common-mode switching noise from the inverter bridge, improving torque-ripple control loop stability in BLDC and PMSM drives.
推荐
Optical Networking Transponder Monitoring
Optical transponders and tunable laser modules require simultaneous sampling of laser bias, temperature, and optical power. The AD7933BRU-REEL provides four single-ended channels in a 28-TSSOP footprint, allowing AGC loops to converge in microseconds without the latency overhead of sigma-delta ADCs. 1.5 MSPS sampling supports baud-rate-rate tracking of laser power fluctuation above the controller interrupt rate, while 2.7-5.25V supply operation aligns with standard transponder -48V-isolated intermediate bus converters.
推荐
Portable Battery-Powered Instrumentation
Handheld multimeters, portable analyzers, and field test equipment benefit from the AD7933BRU-REEL's low power dissipation and 2.7V min supply, enabling 2x AA / Li-primary battery operation with sub-1mW quiescent budgets between conversions. Four channels digitize simultaneous voltage, current, temperature, and isolation measurement points in compact enclosures. The 28-TSSOP package minimizes board footprint in space-constrained handheld form factors, and 1.5 MSPS rate easily exceeds typical portable instrumentation update rates of 1-100 sps.
推荐
Industrial Sensor Signal Digitization
Bridge sensors, RTDs, thermocouples, and 4-20mA current loops require multiplexing and digitizing inside a programmable logic controller backplane. The AD7933BRU-REEL's 2/4-channel flexibility handles local sensor clusters without external MUX, and 1.5 MSPS throughput oversamples decimation-filtered low-frequency signals for 16+ effective bits in noise floors. Wide 50 MHz input bandwidth lets undersampling techniques capture RFID/inductive proximity sensor bursts beyond the throughput-rate Nyquist limit.
推荐
Medical Patient Monitoring Front-End
Patient monitoring devices like multi-parameter bedside monitors digitize ECG, SpO2, respiration, and temperature channels simultaneously. The AD7933BRU-REEL's SAR architecture provides deterministic sampling latency essential for ECG R-peak detection algorithms, and four channels handle the primary vital signs on a single IC. Low power dissipation extends battery runtime on portable telemetry units. Internal 2.5V reference maintains stable gain over physiological temperature ranges without external reference overhead in compact device enclosures.
推荐
推荐产品汇总
工程参考数据： AD7933BRU-REEL ——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 | AD7933BRUZ-REEL | AD7933BRU-REEL7 | AD7934BRU-REEL | AD7934BRUZ-REEL | AD7920BRMZ-REEL |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-TSSOP | 28-TSSOP - same | 28-TSSOP - same | 28-TSSOP - same | 28-TSSOP - same | MSOP-8 - DIFFERENT |
| Resolution | 10 bits | 10 bits | 10 bits | 12 bits | 12 bits | 10 bits |
| Sampling Rate | 1.5 MSPS | 1.5 MSPS | 1.5 MSPS | 1.5 MSPS | 1.5 MSPS | 1 MSPS |
| Input Channels | 4 (also 2) | 4 (also 2) | 4 (also 2) | 4 (also 2) | 4 (also 2) | 1 differential / 2 pseudo-differential |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.35 V to 5.25 V |
| RoHS Status | Compliant | Compliant (Z-suffix) | Compliant | Compliant | Compliant (Z-suffix) | Compliant |
关键差异点
- Drop-in upgradable resolution path to 12-bit （对比 AD7934BRU-REEL)
- Wider analog input bandwidth than typical 1.5 MSPS SAR peers （对比 AD7920BRMZ-REEL)
- Same-channel-count exact drop-in via packaging variant （对比 AD7933BRUZ-REEL)
设计说明
Estimated: at VDD=5V, 1.5 MSPS, the AD7933BRU-REEL dissipates approximately 10-13 mW based on typical datasheet figures; at 3V VDD power drops to ~5 mW. Decouple AVDD with a 10uF tantalum + 0.1uF ceramic bypass within 5 mm of the pin, and replicate the same network on DVDD. Sharing the analog and digital supply pins through a star-ground avoids digital switching noise corrupting the analog reference and degrades spurious-free dynamic range in undersampling applications.
Use a single solid ground plane partitioned under the analog input pins and digital output bus; route the analog input traces as 50-ohm microstrip or guarded traces to maintain flat frequency response across the 50 MHz input bandwidth. Place the input RC anti-aliasing filter directly at the ADC input pin - series resistor then shunt capacitor to AGND - to isolate the amplifier from switching-capacitor kickback on the analog inputs during sampling. Avoid crossing digital output traces over analog input traces.
Do not exceed the maximum analog input voltage of AVDD + 0.3 V - overdrive during normal operation can latch-up the input ESD structure. Ensure the REF IN/REF OUT pin has 0.1uF ceramic decoupling if used in external-reference mode. The CONVST pin must be held high for the full conversion time, and the CLK IN frequency must stay within the datasheet limits - inaccurate triggering produces non-monotonic behavior at full-scale transitions. Always use the WLCSP-friendly tap-and-drill pattern if extending the design to the -BCPZ package variant.
合规信息
RoHS compliant per AD7933 product page. The -REEL suffix denotes reel quantity packaging, not lead-free status; choose the -BRUZ-REEL variant for lead-free finish. AEC-Q100 not applicable for non-automotive precision data-acquisition systems.
