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Analog Devices Inc. AD7863ARSZ-2
- Part No.:
- AD7863ARSZ-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD7863ARSZ-2.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,858
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Product details
Overview
AD7863ARSZ-2 from Analog Devices is a dual-channel, simultaneous-sampling 14-bit analog-to-digital converter (ADC) operating from a single 5 V supply. It delivers 175 kSPS throughput per channel with 5.2 μs conversion time, ±2.5 V input range (unipolar 0 V to 2.5 V), and integrated 2.5 V reference - designed for precision motor control feedback and multi-axis sensor acquisition where phase coherence between channels is critical.
For engineers reviewing the AD7863ARSZ-2 datasheet, AD7863ARSZ-2 pinout, AD7863ARSZ-2 application, or AD7863ARSZ-2 equivalent, key selection criteria include simultaneous sampling capability, aperture delay matching (<350 ps), straight-binary output coding, 0.5 μs track/hold acquisition time, and SOIC_W 28-lead package compatibility with industrial signal conditioning systems.
Technical Context
The AD7863ARSZ-2 integrates two independent successive-approximation ADCs, each paired with a dedicated track-and-hold amplifier and sharing a common internal 2.5 V reference. Its dual-channel architecture supports simultaneous sampling of VA1/VA2 or VB1/VB2 via A0 multiplexer select, preserving inter-channel phase integrity for synchronized waveform capture.
Conversion is initiated by a falling edge on CONVST, triggering both track/holds into hold mode and starting parallel conversions. Results are read via 14-bit parallel bus (DB0–DB13) using CS/RD handshaking, with BUSY indicating completion. The device operates in Mode 1 (high-speed, 5.2 μs) or Mode 2 (auto-power-down, 10 μs), consuming 45 mW typical in normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - guarantees monotonicity and no missing codes over full temperature range. |
| Sampling Rate | 175 kSPS per channel - enables real-time capture of signals up to ~87.5 kHz Nyquist frequency. |
| Conversion Time | 5.2 μs (Mode 1) - defines minimum inter-conversion interval for sustained high-throughput operation. |
| Analog Input Range | 0 V to 2.5 V unipolar - matches standard DAC output ranges and simplifies interface with voltage-mode sensors. |
| Output Coding | Straight (natural) binary - eliminates software sign-extension overhead in microcontroller firmware. |
| Aperture Delay Matching | ≤350 ps max - ensures <0.02° phase error at 100 kHz between sampled channels, critical for vector control. |
| Power Dissipation | 45 mW typical (VDD = 5.25 V) - supports thermally constrained embedded enclosures without forced cooling. |
Pinout & Package
AD7863ARSZ-2 is housed in a 28-lead SOIC_W (Wide-body Small Outline Integrated Circuit) package, 17.9 mm × 7.5 mm body size, 1.27 mm lead pitch, RoHS-compliant, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VA1, VA2, VB1, VB2 | Analog Inputs (Channel A/B, Pair 1/2) | Four differential-pair-capable inputs; VA1/VA2 or VB1/VB2 sampled simultaneously based on A0 state. |
| A0 | Multiplexer Select | Logic-controlled channel selector: low → VA1/VA2 active; high → VB1/VB2 active during CONVST edge. |
| CONVST | Convert Start | Falling-edge-triggered global sample command - initiates simultaneous hold and conversion on both channels. |
| BUSY | Status Output | Active-high open-drain signal indicating conversion in progress; falls when results are latch-ready. |
| CS, RD | Parallel Interface Controls | Standard TTL-compatible chip select and read strobe - enable sequential access to DB0–DB13 outputs. |
| DB0–DB13 | Data Outputs | 14-bit three-state TTL bus - first read returns VA1/VB1 result; second read returns VA2/VB2 result. |
| VREF | Reference I/O | 2.5 V nominal internal reference output; can be overdriven by external reference for improved accuracy. |
| AGND, DGND | Analog/Digital Grounds | Separate ground pins require star-point connection to minimize digital noise coupling into analog path. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous Sampling | Two independent track/hold amplifiers acquire VA1/VA2 or VB1/VB2 at identical instants - preserves phase relationship for FFT-based analysis. |
| Integrated Reference | On-chip 2.5 V bandgap reference with ±10 mV initial error and 25 ppm/°C drift - eliminates need for external reference in cost-sensitive designs. |
| Overvoltage Protection | Analog inputs tolerate +7 V (vs. AGND) without damage - withstands transient coupling in industrial motor drive environments. |
| Low Power Operation | 45 mW typical consumption and 105 μW power-down mode - extends battery life in portable test equipment and field sensors. |
| Aperture Matching | ≤350 ps inter-channel aperture delay mismatch - enables sub-degree angle resolution in servo position feedback loops. |
Applications
| Motor Phase Current Sensing | Multi-Axis Vibration Monitoring |
|---|---|
Use Scenario: Real-time measurement of current in two motor phases (U/V) for field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Dual-channel simultaneous ADC capturing interleaved current waveforms with matched sampling instants to compute instantaneous torque vector. Use Value: Enables accurate dq-axis transformation without interpolation artifacts, improving efficiency and reducing torque ripple in BLDC/PMSM drives. |
Use Scenario: Simultaneous acquisition of acceleration signals from X/Y axes on rotating machinery for spectral analysis. IC Role / Device Role / Timing Role: High-fidelity synchronized digitization of orthogonal vibration modes to detect bearing faults or imbalance harmonics. Use Value: Preserves cross-channel phase correlation required for coherent averaging and directional source localization in predictive maintenance systems. |
| Industrial PLC Analog Input Module | Energy Meter Voltage/Current Sampling |
Use Scenario: 4-channel analog input card in programmable logic controller handling mixed-signal sensor inputs (4–20 mA, 0–10 V). IC Role / Device Role / Timing Role: Dual ADC core servicing two isolated input pairs with shared timing control, reducing component count vs. discrete converters. Use Value: Simplifies PCB layout with single SOIC_W footprint and unified parallel interface, lowering BOM cost and calibration complexity. |
Use Scenario: Simultaneous sampling of line voltage and neutral current in Class 0.5 energy meters for true RMS and power factor calculation. IC Role / Device Role / Timing Role: Precise time-aligned acquisition of voltage and current waveforms to eliminate phase-angle errors in watt-hour computation. Use Value: Meets IEC 62053-21 accuracy requirements without external synchronization circuitry or FPGA-based alignment logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7656ASTZ | 6-channel, 16-bit, 250 kSPS, SPI interface, no internal reference - requires external REF and level-shifting for 5 V logic. | Higher resolution and channel count but lacks native 0–2.5 V unipolar range; better suited for multi-sensor data loggers than motor control. | Select AD7656ASTZ when >14-bit resolution and >2 channels are needed; avoid if board space or 5 V parallel interface is mandatory. |
| ADS8556IPMR | 6-channel, 16-bit, 630 kSPS, parallel interface, internal reference, ±10 V/±5 V/0–5 V ranges - larger 64-pin HTQFP package. | Supports wider input ranges and higher speed but consumes 120 mW; requires more complex decoupling and thermal management. | Choose ADS8556IPMR for high-channel-count test systems needing >175 kSPS; AD7863ARSZ-2 remains optimal for compact 2-channel industrial controllers. |
Compared with AD7656ASTZ and ADS8556IPMR, AD7863ARSZ-2 offers the smallest footprint, lowest power, and native 0–2.5 V unipolar support - making it uniquely suitable for space-constrained, battery-aware, or cost-sensitive dual-signal acquisition where 14-bit resolution suffices.
Availability
AD7863ARSZ-2 is available at Aetrix Electronics and suitable for motor control systems, industrial PLC analog input modules, predictive maintenance sensors, and energy metering platforms requiring stable component supply and long-term production continuity.
Supply support for AD7863ARSZ-2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.
The AD7863 family was engineered for high-accuracy, phase-coherent signal acquisition in motion control and instrumentation - emphasizing simultaneous sampling, low power, and robust industrial interfacing without external support components.
FAQ
What is the input voltage range supported by AD7863ARSZ-2?
The AD7863ARSZ-2 supports a unipolar analog input range of 0 V to 2.5 V referenced to AGND. This is distinct from the ±10 V (AD7863-10) and ±2.5 V (AD7863-3) variants. Overvoltage protection allows inputs up to +7 V without damage, enhancing robustness in noisy industrial environments. The internal 2.5 V reference directly scales this full-scale range.
Does AD7863ARSZ-2 require an external reference?
No, AD7863ARSZ-2 includes an internal 2.5 V bandgap reference with ±10 mV accuracy at 25°C and 25 ppm/°C temperature coefficient. The VREF pin serves as both output and input - it can be left floating to use the internal reference or driven by an external precision reference for improved system accuracy. No external components are required for basic operation.
How does the AD7863ARSZ-2 handle simultaneous sampling across two channels?
AD7863ARSZ-2 uses two independent track-and-hold amplifiers that respond identically to the falling edge of the CONVST signal, placing both into hold mode at precisely matched instants. Aperture delay matching is guaranteed ≤350 ps, ensuring phase coherence between sampled VA1/VA2 or VB1/VB2 pairs - critical for vector control and spectral analysis where relative timing must be preserved.
What is the data output format of AD7863ARSZ-2?
AD7863ARSZ-2 outputs straight (natural) binary coding - unlike the twos-complement format used by AD7863-10 and AD7863-3. For a 0–2.5 V input, 0x0000 represents 0 V and 0x3FFF (16383 decimal) represents full-scale 2.5 V. This simplifies firmware interpretation in microcontrollers without sign-handling logic, especially in unipolar sensor interfaces.
Can AD7863ARSZ-2 operate from a single 5 V supply?
Yes, AD7863ARSZ-2 is specified for single-supply operation at VDD = 5.0 V ±5%. It draws 11 mA typical in normal mode, resulting in 45 mW typical power dissipation at 5.25 V. The device also features an auto-power-down mode consuming only 105 μW maximum, making it suitable for portable or energy-conscious industrial applications without split supplies.
AD7863ARSZ-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 175k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7863ARSZ-2 FAQ
1.How can I place an order for AD7863ARSZ-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7863ARSZ-2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7863ARSZ-2 reliable?
The price and inventory of AD7863ARSZ-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7863ARSZ-2 is usually 5 days.
3.What payment methods are accepted for AD7863ARSZ-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7863ARSZ-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7863ARSZ-2?
AD7863ARSZ-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7863ARSZ-2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7863ARSZ-2?
For technical support, including AD7863ARSZ-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7863ARSZ-2 requirements.
6.How does Aetrix verify that AD7863ARSZ-2 is sourced from the original manufacturer or authorized distributors?
All AD7863ARSZ-2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7863ARSZ-2 meets industry standards.
7.What is the process for return or replacement of AD7863ARSZ-2?
All AD7863ARSZ-2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7863ARSZ-2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7863ARSZ-2 part is unused and in its original packaging.
Return procedure for AD7863ARSZ-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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