AD7933BRU-REEL - 10-Bit 1.5 MSPS 4-Ch SAR ADC | Analog Devices
MPN: AD7933BRU-REEL ✓ AktifAD7933BRU-REEL Ringkasan
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.
Alternatif penggantian untuk AD7933BRU-REEL — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
AD7933BRUZ-REEL
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
AD7933BRU-REEL7
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
AD7934BRU-REEL
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
AD7934BRUZ-REEL
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
AD7933BRU-REEL Rating Maksimal & Karakteristik Listrik
| Number of Bits | 10 |
| Laju Pengambilan Sampel | 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 |
| Tegangan Referensi | 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 |
| Rentang Suhu Kerja | -40C to +85C (industrial) |
| Paket | 28-TSSOP (RU-28) |
| Tipe Mounting | Surface Mount |
| Packaging | Tape & Reel (REEL suffix) |
| Status RoHS | Compliant |
Konfigurasi Pin AD7933BRU-REEL
| Pin produk 1 | AGND — Analog ground |
| Pin produk 2 | AVDD — Analog supply voltage (2.7V to 5.25V) |
| Pin produk 3 | REF IN/REF OUT — Reference input/output (internal 2.5V or external overdrive) |
| Pin produk 4 | VINA — Analog input channel A |
| Pin produk 5 | VINB — Analog input channel B |
| Pin produk 6 | VINC — Analog input channel C |
| Pin produk 7 | VIND — Analog input channel D |
| Pin produk 8 | GND — Ground |
| Pin produk 9 | DOUT0 — Data output bit 0 (parallel interface) |
| Pin produk 10 | DOUT1 — Data output bit 1 |
| Pin produk 11 | DOUT2 — Data output bit 2 |
| Pin produk 12 | DOUT3 — Data output bit 3 |
| Pin produk 13 | DOUT4 — Data output bit 4 |
| Pin produk 14 | DOUT5 — Data output bit 5 |
| Pin produk 15 | DOUT6 — Data output bit 6 |
| Pin produk 16 | DOUT7 — Data output bit 7 |
| Pin produk 17 | DOUT8 — Data output bit 8 |
| Pin produk 18 | DOUT9 — Data output bit 9 (LSB for 10-bit output) |
| Pin produk 19 | CS — Chip select input (active low) |
| Pin produk 20 | RD — Read input (active low) |
| Pin produk 21 | WR — Write input (active low) / mode configuration |
| Pin produk 22 | CONVST — Conversion start input |
| Pin produk 23 | CLK IN — Clock input for SAR conversion timing |
| Pin produk 24 | DGND — Digital ground |
| Pin produk 25 | DVDD — Digital supply voltage |
| Pin produk 26 | CLK OUT — Clock output (optional) |
| Pin produk 27 | BIPOLAR — Bipolar input range control |
| Pin produk 28 | RANGE — Analog input range selection |
Aplikasi Umum
AD7933BRU-REEL cocok untuk 6 aplikasis: 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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk AD7933BRU-REEL — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | 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 |
Diferensiator Kunci
- Drop-in upgradable resolution path to 12-bit (vsAD7934BRU-REEL)
- Wider analog input bandwidth than typical 1.5 MSPS SAR peers (vsAD7920BRMZ-REEL)
- Same-channel-count exact drop-in via packaging variant (vsAD7933BRUZ-REEL)
Catatan Desain
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.
Informasi Konformitas
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.
