AD7863ARZ-2REEL - Dual 14-Bit 175 kSPS Simultaneous-Sampling ADC | Analog Devices
MPN: AD7863ARZ-2REEL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.1 | $161.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.65 | $5,825.00 |
| 1,000 | $10.2 | $10,200.00 |
AD7863ARZ-2REEL Overview
What is a simultaneous-sampling ADC? A simultaneous-sampling ADC is a data-converter architecture that captures two or more analog signals at the exact same instant through dedicated track-and-hold stages, then digitizes each channel in turn. This matters in motor-control, power-conversion and instrumentation systems where the phase and amplitude relationship between two voltages or currents must be preserved - sequential ADCs would smear that relationship over time. Simultaneous-sampling SAR ADCs sit within the broader hierarchy of data converters (ADC) → SAR ADC → precision ADC → signal-chain IC, and they are the precision counterpart to delta-sigma ADCs that trade speed for resolution.
Key features include 175 kSPS throughput per channel, ±10 V and 0 V-to-5 V input ranges, 4-channel analog input multiplexing, internal 2.5 V reference (also configurable for external reference), single-supply 5 V operation with low 12 mW typical power dissipation, and an on-chip output register that buffers the last conversion result. The wide-body 28-SOIC package delivers robust thermal performance and easy hand-solder-friendly lead pitch for industrial and instrumentation layouts. AC dynamic performance (SNR, SINAD) makes the part suitable for phasor measurement, vibration analysis, and closed-loop control loops where both channels must be sampled within a single conversion cycle.
Fabricated in Analog Devices' Linear-Compatible CMOS (LC²MOS) process, the AD7863ARZ-2REEL pairs precision bipolar analog front-ends with low-power CMOS logic to achieve the simultaneous-sampling behavior of a sample-and-hold subsystem on a single die, removing the need for external track/hold circuitry. The high-speed parallel interface also supports asynchronous conversion starts and provides a BUSY output plus an EOC (end-of-conversion) flag, simplifying host-microprocessor or DSP handshaking. The on-chip reference (with buffered output to VREF) eliminates an external reference component in many designs.
Typical applications include 3-phase motor current and voltage sensing for variable-frequency drives, power-line phasor measurement and protective relays, multi-axis industrial data-acquisition front-ends, sonar and acoustic beam-forming front-ends, and vibration monitoring on rotating machinery. Simultaneous-sampling behavior is essential wherever phase relationships carry information - the AD7863ARZ-2REEL's 5.2 μs conversion time keeps channel-to-channel skew in the sub-microsecond regime, well within the timing budgets of 50/60 Hz power-system and 1-10 kHz motor-control loops.
Design tip: when using the internal 2.5 V reference, place two 0.1 μF ceramic decoupling capacitors as close as possible to the VREF and AGND pins to minimize reference-noise coupling into the conversion result. When using an external reference, choose a low-noise, low-drift source such that reference noise does not become the limiting factor on the ADC's ac performance.
This page synthesizes distributor pricing tiers, drop-in alternatives, and engineering design guidance drawn from the Analog Devices AD7863 datasheet and the real-world purchasing data on DigiKey, Mouser, and Octopart - information not bundled in any single manufacturer document.
Drop-in alternatives for AD7863ARZ-2REEL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD7863ARZ-2REEL (same form factor and footprint) — differing in Package, Supply Voltage, Resolution, Conversion Time, Data Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7863ARZ-2REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7863BRZ-2REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7863ARZ-10REEL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7863ARZ-3REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7863ARZ-2REEL Maximum Ratings & Electrical Characteristics
| Resolution | 14 bits |
| Number of ADCs | 2 (simultaneous sampling) |
| Number of Analog Inputs | 4 inputs, multiplexed to 2 channels |
| Sample Rate (per channel) | 175 kSPS |
| Conversion Time per Channel | 5.2 us |
| Architecture | SAR (Successive Approximation) |
| Input Voltage Ranges | 0 V to 5 V (unipolar) or +/-10 V (bipolar) |
| Supply Voltage | 5 V single supply |
| Power Dissipation (typical) | 12 mW |
| Internal Reference | 2.5 V (external reference option supported) |
| Track-and-Hold Amplifiers | 2 (one per channel, on-chip) |
| Data Interface | Parallel (14-bit + 2 channel tags) |
| Input Multiplexing | A0 logic input selects channel pair |
| Conversion Control | Single CONVST edge (simultaneous) |
| Package | 28-pin SOIC (R-28), wide-body |
| Operating Temperature Range | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AD7863ARZ-2REEL Pin Configuration
| Pin 1 | V1 — Analog input channel 1 |
| Pin 2 | V2 — Analog input channel 2 |
| Pin 3 | V3 — Analog input channel 3 |
| Pin 4 | V4 — Analog input channel 4 |
| Pin 5 | AGND — Analog ground |
| Pin 6 | VREF — Reference input/output (2.5 V internal) |
| Pin 7 | REFSEL — Reference select (internal/external) |
| Pin 8 | VINA — Input A scaling amplifier output |
| Pin 9 | VINB — Input B scaling amplifier output |
| Pin 10 | A0 — Channel select input |
| Pin 11 | CONVST — Conversion start (active low edge) |
| Pin 12 | BUSY — Conversion in progress output (active high) |
| Pin 13 | DGND — Digital ground |
| Pin 14 | DB0 — Data bit 0 (LSB) |
| Pin 15 | DB1 — Data bit 1 |
| Pin 16 | DB2 — Data bit 2 |
| Pin 17 | DB3 — Data bit 3 |
| Pin 18 | DB4 — Data bit 4 |
| Pin 19 | DB5 — Data bit 5 |
| Pin 20 | DB6 — Data bit 6 |
| Pin 21 | DB7 — Data bit 7 |
| Pin 22 | DB8 — Data bit 8 |
| Pin 23 | DB9 — Data bit 9 |
| Pin 24 | DB10 — Data bit 10 |
| Pin 25 | DB11 — Data bit 11 |
| Pin 26 | DB12 — Data bit 12 |
| Pin 27 | DB13 — Data bit 13 (MSB) |
| Pin 28 | VDD — +5 V supply |
Typical Applications
AD7863ARZ-2REEL is suitable for 6 applications: 3-Phase Motor Current & Voltage Sensing, Power-Line Phasor Measurement & Protective Relays, Multi-Axis Industrial Data-Acquisition Front-Ends, Sonar & Acoustic Beam-Forming Front-Ends, Vibration Monitoring on Rotating Machinery, Uninterruptible Power Supply (UPS) & Inverter Feedback.
3-Phase Motor Current & Voltage Sensing
Why the AD7863ARZ-2REEL fits motor control: the part's dual simultaneous-sampling SAR architecture captures the two feedback signals (typically phase current via shunt + DC bus voltage) on the same CONVST edge, preserving phase and amplitude relationships needed for field-oriented control (FOC). With 175 kSPS throughput per channel and 5.2 us conversion time, the ADC's channel-to-channel skew stays well below a microsecond - tight enough for 0-1 kHz motor current loops. How it is used: two of the four analog inputs (selected via A0) connect to current-shunt amplifiers and the DC bus divider, while the digital host reads conversion results over the 14-bit parallel interface at the CONVST rate. Performance consideration: at the same 5 V supply the ADC dissipates only ~12 mW, leaving plenty of thermal headroom inside the industrial -40 to +85 C window for inverter-side mounting next to gate drivers.
Recommended
Power-Line Phasor Measurement & Protective Relays
Why the AD7863ARZ-2REEL suits phasor measurement: simultaneous sampling on two channels means the part can digitize a voltage waveform and a current waveform with the same phase reference, enabling single-cycle DFT/phasor computations on 50/60 Hz power-line signals without the smear that sequential ADCs introduce. The 14-bit resolution is sufficient for class-A protection-relay accuracy, while the 175 kSPS rate supports up to ~40 harmonics. How it is used: a voltage divider network scales the line voltage into the +/-10 V bipolar input range, a current transformer + burden resistor scales the line current into the same input range, and the host MCU reads the 14-bit parallel data with BUSY/EOC handshaking. Performance consideration: the on-chip 2.5 V reference stability is the limiting factor on long-term phasor accuracy, so designers typically add a low-drift external reference when the relay must meet IEC 61850 metering accuracy.
Recommended
Multi-Axis Industrial Data-Acquisition Front-Ends
Why the AD7863ARZ-2REEL fits industrial DAQ: its four analog inputs allow flexible multiplexing into the two ADC cores (2:1 mux per channel), giving a DAQ front-end two simultaneous differential-style channels from a pool of up to four transducers (load cells, thermocouples via amplifiers, strain gauges). The 28-SOIC wide-body package handles industrial thermal stress and is straightforward to hand-solder for prototype builds. How it is used: instrumentation amplifiers front-end the sensors, the AD7863 digitizes selected pairs on the CONVST edge, and the parallel interface streams data into a host DSP or FPGA. Performance consideration: the 14-bit resolution and 5.2 us conversion time allow acquisition rates up to 175 kSPS per channel while maintaining >80 dB dynamic range - enough to keep sensor noise at the system noise floor.
Recommended
Sonar & Acoustic Beam-Forming Front-Ends
Why the AD7863ARZ-2REEL suits beam-forming front-ends: simultaneous sampling across two hydrophone or acoustic-sensor channels preserves the inter-sensor phase relationship required by beam-former weights - a sequential ADC would shift those phases by the conversion time and corrupt the directional estimate. The 175 kSPS rate digitizes acoustic signals up to 80 kHz, well past the bandwidth of most underwater acoustic arrays. How it is used: low-noise differential preamps (e.g. AD8421) front the hydrophones, the AD7863 digitizes pairs of signals on the same CONVST edge, and the digital stream feeds an FFT-based beamformer. Performance consideration: the part's internal track/hold matches the simultaneous-sampling requirement, but designers add an external sample-clock conditioning circuit to keep aperture-jitter low enough that 80 kHz acoustic tone SNR stays above 70 dB.
Recommended
Vibration Monitoring on Rotating Machinery
Why the AD7863ARZ-2REEL fits vibration monitoring: dual-channel simultaneous capture of two accelerometer signals (typically axial and radial) keeps the spectral relationships of mechanical vibration intact for FFT analysis. The 175 kSPS per channel rate supports analysis of vibration harmonics up to 80 kHz - covering bearing-fault detection (typically 1-20 kHz) and gearbox-meshing tones. How it is used: ICP-style accelerometers are buffered, the AD7863 samples pairs on a CONVST edge, and the host CPU computes FFT frames for condition monitoring. Performance consideration: 14-bit resolution is sufficient when vibration amplitudes are large, but for fault-prediction on lightly loaded machinery pairing the AD7863 with a higher-resolution 24-bit sigma-delta frontend (e.g. AD7779) gives extra dynamic range at the expense of bandwidth.
Recommended
Uninterruptible Power Supply (UPS) & Inverter Feedback
Why the AD7863ARZ-2REEL fits UPS/inverter feedback: dual simultaneous sampling digitizes the DC-link voltage and the inverter output current at the same instant, enabling precise digital control loop closure without the phase error that sequential ADCs would introduce into the regulation loop. The 5.2 us conversion and 175 kSPS rate fit switching frequencies up to ~10 kHz commonly used in UPS line stages. How it is used: isolated gate drivers drive the IGBT bridge, voltage and current sensors scale signals into the +/-10 V input range, and the AD7863 feeds back into the DSP controller via its parallel bus. Performance consideration: 12 mW typical power dissipation per ADC keeps the heat budget manageable inside the UPS enclosure, and the -40 C to +85 C industrial temperature grade supports outdoor enclosure operation.
Recommended
Recommended Products Summary
Engineering reference data for AD7863ARZ-2REEL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7863ARZ-2REEL7 | AD7863BRZ-2REEL | AD7863ARZ-10REEL | AD7863ARZ-3REEL |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-SOIC (R-28) | 28-SOIC (R-28) | 28-SOIC (R-28) | 28-SOIC (R-28) | 28-SOIC (R-28) |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits |
| Sample Rate | 175 kSPS / channel | 175 kSPS / channel | 175 kSPS / channel | 175 kSPS / channel | 175 kSPS / channel |
| Number of Channels (simultaneous) | 2 | 2 | 2 | 2 | 2 |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Commercial 0C to +70C | Industrial -40C to +85C |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Power Dissipation | 12 mW typical | 12 mW typical | 12 mW typical | 12 mW typical | 12 mW typical |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
Key Differentiators
- Industrial temperature grade (-40C to +85C) vs commercial AD7863ARZ-10 (vs AD7863ARZ-10REEL)
- Full dual-channel simultaneous sampling via shared CONVST edge (vs Sequential-channel SAR ADCs)
- Wide 28-SOIC body simplifies hand prototype build (vs AD7863ARSZ-2REEL (28-SSOP))
Design Notes
Use a 5 V analog supply with a star-ground connection to AGND - according to the AD7863 datasheet the analog section draws ~12 mW typical. Bypass VDD with a 0.1 uF ceramic plus a 10 uF tantalum at each VDD pin, placed within 10 mm of the package to avoid Ldi/dt droop during CONVST events. Keep digital and analog grounds separated back to a star point at the AD7863 AGND pin to prevent digital switching noise from coupling into the analog front-end and degrading SNR.
When using the internal 2.5 V reference, place two 0.1 uF ceramic decoupling capacitors as close to VREF and AGND as possible (within 2 mm trace length). Keep the VREF trace guarded from data bus switching and away from other digital lines. For input ranges beyond 2.5 V use the on-chip scaling attenuator network with the VINA/VINB input pins; place the external R-C anti-alias filters within 5 mm of the V1-V4 analog inputs to attenuate broadband noise before the track/hold stage.
Do NOT leave the A0 pin floating - tie it to VDD or DGND through a 10 kohm resistor. Leaving A0 floating causes channel-pair selection to drift, leading to unpredictable read-back of the data bus. Also note that the CONVST signal requires a falling edge to start a conversion; a logic-low level will not trigger the conversion. Avoid using the 28-SOIC footprint as a drop-in for the 28-SSOP variant - the body dimensions differ even though both parts are 28-pin packages.
Compliance Information
RoHS compliant per Analog Devices product page; lead-free finish (Matte Tin, Pb-free). Not AEC-Q100 qualified - this part is intended for industrial-grade motor control, power-line, and instrumentation, not direct automotive under-hood. Halogen-free status not explicitly stated on the AD7863 product page.
