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Analog Devices Inc. AD7862ARZ-3REEL
- Part No.:
- AD7862ARZ-3REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7862ARZ-3REEL.pdf
- Description:
- IC ADC 12BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,353
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Product details
Overview
AD7862ARZ-3REEL from Analog Devices is a dual-channel, simultaneous-sampling 12-bit analog-to-digital converter (ADC) with ±2.5 V input range, 250 kSPS throughput, and integrated +2.5 V reference. It features two independent track-and-hold amplifiers, high-speed parallel interface (12-bit TTL), and operates from a single +5 V supply. Used in AC motor control and data acquisition systems requiring phase-coherent sampling of dual analog signals.
For engineers reviewing the AD7862ARZ-3REEL datasheet, AD7862ARZ-3REEL pinout, AD7862ARZ-3REEL application, or AD7862ARZ-3REEL equivalent, key selection criteria include simultaneous sampling capability, aperture delay matching (<200 ps), ±1 LSB relative accuracy, 70 dB SNR at 100 kHz, and SOIC-28 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The AD7862ARZ-3REEL implements two independent successive-approximation ADCs (4 µs conversion core) with synchronized track/hold circuits triggered by a single CONVST falling edge. Its internal laser-trimmed clock oscillator eliminates external timing components, and the dual-channel architecture preserves inter-channel phase integrity for time-critical signal analysis.
It uses Linear Compatible CMOS (LC2MOS) process technology to integrate precision bipolar front-end circuitry with low-power CMOS logic. The device supports three input ranges via variant suffixes; AD7862ARZ-3REEL specifically configures the analog input scaling network for ±2.5 V full-scale operation with 6 kΩ input resistance and ±7 V overvoltage protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes and sufficient dynamic range for 70 dB SNR applications |
| Sampling Rate | 250 kSPS - enables real-time capture of signals up to 125 kHz Nyquist bandwidth |
| Analog Input Range | ±2.5 V - matches common signal processing levels without external level-shifting circuitry |
| Relative Accuracy | ±1 LSB max - ensures endpoint linearity within 0.024% FSR for precise amplitude measurement |
| Aperture Delay Matching | 200 ps max - preserves sub-degree phase coherence between Channel A and Channel B inputs |
| Power Dissipation | 60 mW typ at 250 kSPS - supports thermally constrained industrial PCB layouts |
| Reference Output | +2.5 V ±10 mV @ 25°C - provides stable, buffered reference source for system-level calibration |
Pinout & Package
AD7862ARZ-3REEL is housed in a 28-lead Small Outline IC (SOIC) package with standard 0.3-inch body width and gull-wing leads. Pin 1 is located at the top-left corner adjacent to the index mark; pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | NC | No-connect - must remain unconnected per datasheet; no internal connection or function |
| 2–6, 9–15 | DB11–DB0 | 12-bit parallel data bus - outputs twos-complement codes (MSB DB11, LSB DB0); three-state TTL compatible |
| 7 | DGND | Digital ground reference - separate from AGND to minimize digital switching noise coupling into analog path |
| 8 | CONVST | Convert start input - falling-edge-triggered control signal that simultaneously latches both track/holds and initiates dual conversion |
| 16, 27 | AGND | Analog ground - dedicated low-impedance return for mux, track/hold, reference, and ADC analog sections |
| 17, 18, 25, 26 | VB2, VA2, VA1, VB1 | Four analog inputs - grouped as Channel A (VA1/VA2) and Channel B (VB1/VB2); selected via A0 for read sequencing |
| 19 | VREF | Reference I/O - supplies or accepts +2.5 V reference; internal buffer provides 2 kΩ output impedance |
| 20 | A0 | Multiplexer select - determines whether first RD cycle reads VA1/VB1 (A0 = low) or VA2/VB2 (A0 = high) |
| 21 | CS | Chip select - active-low enable for parallel interface; required with RD to activate DB0–DB11 outputs |
| 22 | RD | Read strobe - active-low signal that latches conversion result onto data bus; timing-critical for 30 ns access window |
| 23 | BUSY | Status output - high during conversion; falls at completion to indicate valid data ready on bus |
| 24 | VDD | +5 V ±5% supply - powers both analog and digital sections; decoupling capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling & conversion | Both channels acquire and convert in lockstep using shared CONVST edge - eliminates inter-channel timing skew |
| Integrated +2.5 V reference | Buffered 2.5 V output with ±25 mV max error over –40°C to +85°C - removes need for external reference IC |
| Overvoltage protection | ±7 V tolerance on all analog inputs - prevents damage during transient events in motor drive or power supply monitoring |
| Low power auto-sleep mode | 75 µW standby consumption - extends battery life in portable DAQ systems without sacrificing wake-up latency |
| High-speed parallel interface | 30 ns data access time after RD - enables direct connection to 8051, ARM Cortex-M, or FPGA without glue logic |
Applications
| AC Motor Control | Data Acquisition Systems |
|---|---|
Use Scenario: Real-time current and voltage sensing in three-phase inverter drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: Dual simultaneous sampling captures phase-current and DC-link voltage with sub-microsecond timing alignment to preserve vector rotation accuracy. Use Value: Aperture delay matching <200 ps ensures <0.1° phase error at 1 kHz fundamental, enabling precise torque ripple suppression. |
Use Scenario: Multi-channel vibration monitoring in predictive maintenance systems with synchronized sensor inputs. IC Role / Device Role / Timing Role: Simultaneous sampling of accelerometer and strain gauge pairs on rotating machinery shafts. Use Value: 250 kSPS throughput supports 125 kHz anti-aliasing bandwidth, capturing bearing fault frequencies up to 10 kHz with 12-bit resolution. |
| Uninterruptible Power Supplies (UPS) | Communications Signal Monitoring |
Use Scenario: Input/output voltage and current monitoring during transfer switching and battery discharge cycles. IC Role / Device Role / Timing Role: Dual-channel acquisition of AC line voltage and load current to compute real-time power factor and harmonic content. Use Value: ±2.5 V input range matches conditioned sensor outputs; 70 dB SNR enables THD measurement down to –78 dBc per IEEE 519. |
Use Scenario: Baseband I/Q signal digitization in software-defined radio (SDR) test equipment. IC Role / Device Role / Timing Role: Simultaneous sampling of in-phase (I) and quadrature (Q) analog paths prior to digital demodulation. Use Value: Tight channel-to-channel isolation (–80 dB) prevents crosstalk-induced EVM degradation in QPSK/QAM waveforms. |
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 |
|---|---|---|---|
| AD7863ARZ-3 | 14-bit resolution, same SOIC-28 package, identical pinout and timing; higher SNR (74 dB), slower max rate (100 kSPS) | Used where amplitude resolution >12 bits is critical (e.g., high-fidelity audio analysis), but throughput <250 kSPS is acceptable | Select AD7863ARZ-3 when 14-bit precision outweighs speed requirement; verify system firmware supports wider data bus. |
| ADS8364IPAG | 6-channel simultaneous-sampling, 16-bit, SPI interface, QFP-64 package; no internal reference; requires external REF3025 | Suitable for multi-sensor systems needing >2 channels (e.g., 3-phase power quality analyzers), but demands PCB redesign and driver development | Choose ADS8364IPAG only when expanding beyond dual-channel or requiring >12-bit resolution; not drop-in compatible. |
Compared with AD7862ARZ-3REEL, AD7863ARZ-3 trades speed for resolution while maintaining pin compatibility, whereas ADS8364IPAG offers channel scalability at the cost of interface complexity and layout change - making AD7862ARZ-3REEL optimal for cost-sensitive, space-constrained dual-channel designs requiring 250 kSPS.
Availability
AD7862ARZ-3REEL is available at Aetrix Electronics and suitable for AC motor control, uninterruptible power supplies, and data acquisition systems requiring stable component supply across extended industrial temperature ranges and long production lifecycles.
Supply support for AD7862ARZ-3REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD7862 product line delivers simultaneous-sampling dual ADCs optimized for real-time control and measurement applications demanding phase coherence, low power, and single-supply operation - targeting industrial automation, energy infrastructure, and test equipment markets.
FAQ
What is the maximum sampling rate supported by the AD7862ARZ-3REEL?
The AD7862ARZ-3REEL supports a maximum throughput rate of 250 kSPS, achieved with a 3.6 µs conversion time in high-sampling mode. This allows full-scale sampling of signals up to 125 kHz while meeting all specified dynamic performance parameters including 70 dB SNR and –78 dB THD at 100 kHz input frequency.
Does the AD7862ARZ-3REEL require an external reference voltage?
No, the AD7862ARZ-3REEL includes an internal +2.5 V reference with ±10 mV accuracy at 25°C and ±25 mV over temperature. A 0.1 µF ceramic capacitor from VREF to AGND is required for stability. An external reference may be connected to VREF if tighter tolerance or system-level reference synchronization is needed.
How does the AD7862ARZ-3REEL handle simultaneous sampling of two analog channels?
The AD7862ARZ-3REEL uses a single CONVST falling edge to place both on-chip track-and-hold amplifiers into hold mode simultaneously, then initiates conversion on both channels in parallel. Aperture delay matching is guaranteed ≤200 ps, preserving relative phase information between Channel A (VA1/VA2) and Channel B (VB1/VB2) inputs.
What is the analog input protection specification for the AD7862ARZ-3REEL?
The AD7862ARZ-3REEL provides ±7 V overvoltage protection on all analog inputs (VA1, VA2, VB1, VB2) when configured for the ±2.5 V input range. This protects against transient surges during motor commutation or grid disturbances without latch-up or parametric shift, per Absolute Maximum Ratings table.
Is the AD7862ARZ-3REEL pin-compatible with other variants in the AD7862 family?
Yes, all AD7862 variants-including AD7862ARZ-3REEL, AD7862ARZ-10, and AD7862ARZ-2-share identical SOIC-28 pinouts, timing diagrams, and control logic. Only the internal analog input scaling resistors differ between versions; no PCB layout changes are required when substituting between AD7862-2, -3, and -10 variants.
AD7862ARZ-3REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 250k
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7862ARZ-3REEL FAQ
1.How can I place an order for AD7862ARZ-3REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7862ARZ-3REEL 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 AD7862ARZ-3REEL reliable?
The price and inventory of AD7862ARZ-3REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7862ARZ-3REEL is usually 5 days.
3.What payment methods are accepted for AD7862ARZ-3REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7862ARZ-3REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7862ARZ-3REEL?
AD7862ARZ-3REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7862ARZ-3REEL 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 AD7862ARZ-3REEL?
For technical support, including AD7862ARZ-3REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7862ARZ-3REEL requirements.
6.How does Aetrix verify that AD7862ARZ-3REEL is sourced from the original manufacturer or authorized distributors?
All AD7862ARZ-3REEL 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 AD7862ARZ-3REEL meets industry standards.
7.What is the process for return or replacement of AD7862ARZ-3REEL?
All AD7862ARZ-3REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7862ARZ-3REEL, 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 AD7862ARZ-3REEL part is unused and in its original packaging.
Return procedure for AD7862ARZ-3REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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