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Analog Devices Inc. AD7862BRZ-10REEL
- Part No.:
- AD7862BRZ-10REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7862BRZ-10REEL.pdf
- Description:
- IC ADC 12BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,925
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Product details
Overview
AD7862BRZ-10REEL from Analog Devices is a dual 12-bit simultaneous-sampling analog-to-digital converter (ADC) with four analog inputs grouped into two synchronized channels (A and B), ±10 V input range, 3.6 µs conversion time, and high-speed parallel interface. It preserves phase coherence between channel pairs and is used in AC motor control systems requiring precise dual-channel voltage/current sampling under real-time constraints.
For engineers reviewing the AD7862BRZ-10REEL datasheet, AD7862BRZ-10REEL pinout, AD7862BRZ-10REEL application, or AD7862BRZ-10REEL equivalent, key selection considerations include simultaneous sampling capability, ±10 V industrial input range, aperture delay matching (200 ps typ), 12-bit resolution with ±1 LSB relative accuracy, and SOIC-28 package compatibility with legacy AD7862 designs.
Technical Context
The AD7862BRZ-10REEL integrates two independent 4 µs successive approximation ADCs, each paired with a track-and-hold amplifier, enabling true simultaneous sampling of VA1/VA2 or VB1/VB2 on falling edge of CONVST. Its internal +2.5 V reference (±10 mV @ +25°C, 25 ppm/°C) feeds both converters, and overvoltage protection allows ±17 V analog input tolerance without damage.
Conversion is initiated by a single CONVST pulse; BUSY goes high during conversion and falls upon completion, signaling availability of both 12-bit results via DB11–DB0. Data read sequence depends on A0 state: first RD access returns VA1/VB1, second returns VA2/VB2 - all under standard CS/RD timing with t5 = 60 ns data access time and t7 = 40 ns minimum inter-read interval.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes and supports 4096 discrete levels across ±10 V full-scale range. |
| Sampling Rate | 250 kSPS - enables real-time acquisition of signals up to 125 kHz (Nyquist-limited) per channel. |
| Conversion Time | 3.6 µs max - defines minimum inter-conversion interval and supports maximum throughput of 250 kSPS. |
| Analog Input Range | ±10 V - matches standard industrial sensor outputs and PLC signal conditioning requirements. |
| Relative Accuracy | ±1 LSB max - ensures end-point linearity error remains within one least-significant bit over temperature. |
| Aperture Delay Matching | 200 ps typ - preserves sub-degree phase alignment between channel A and B for vector-controlled motor drives. |
| Power Dissipation | 60 mW typ at +5 V - enables integration into thermally constrained embedded DAQ modules without active cooling. |
| Channel Isolation | –80 dB max - suppresses crosstalk between VA/VB channels during simultaneous high-frequency signal acquisition. |
Pinout & Package
AD7862BRZ-10REEL is housed in a 28-lead SOIC (Small Outline Integrated Circuit) package with 0.3-inch body width and standard JEDEC MS-012AC footprint. Pin 1 is located at top-left corner (notch-marked side), with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | NC | No connect - must remain unconnected; no internal function or bonding. |
| 2–6, 9–15 | DB11–DB0 | 12-bit parallel data bus - three-state TTL outputs delivering conversion results; coding is twos complement for ±10 V mode. |
| 7 | DGND | Digital ground reference - separate from AGND to minimize digital noise coupling into analog section. |
| 8 | CONVST | Convert start input - falling-edge-triggered control signal that synchronously latches both track/holds and initiates dual conversion. |
| 16, 27 | AGND | Analog ground - dedicated low-impedance return path for mux, track/hold, reference, and ADC analog circuitry. |
| 17, 18, 25, 26 | VB2, VA2, VA1, VB1 | Analog input terminals - four inputs grouped as Channel A (VA1/VA2) and Channel B (VB1/VB2); ±10 V tolerant with 24 kΩ input resistance. |
| 19 | VREF | Reference I/O - provides or accepts +2.5 V reference; internal buffer delivers 2.5 V ±10 mV with 2 kΩ series impedance. |
| 20 | A0 | Multiplexer select - determines which pair (VA1/VA2 or VB1/VB2) is accessed during consecutive RD cycles. |
| 21 | CS | Chip select - active-low enable for parallel interface; must be asserted before RD to activate data outputs. |
| 22 | RD | Read strobe - active-low signal that latches data onto DB11–DB0 bus; timing-critical for valid data capture. |
| 23 | BUSY | Conversion status flag - high during conversion, falls to indicate result readiness for read access. |
| 24 | VDD | +5 V ±5% supply - powers both analog and digital sections; IDD = 15 mA max in normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling & conversion | Preserves phase relationship between Channel A and B inputs - critical for vector control algorithms in servo drives. |
| Internal +2.5 V reference | Eliminates need for external reference IC; ±10 mV initial error and 25 ppm/°C drift support stable gain calibration. |
| Overvoltage protection | Withstands ±17 V on analog inputs without latch-up or parametric shift - enhances robustness in noisy industrial environments. |
| Low power consumption | 60 mW typical at 250 kSPS - reduces thermal load in dense PCB layouts and extends battery life in portable test equipment. |
| High-speed parallel interface | Compatible with 8051, ARM Cortex-M, and DSP microcontrollers using standard CS/RD handshaking - simplifies firmware integration. |
| Aperture delay matching | 200 ps typical mismatch between track/holds - enables <0.01° phase error at 100 kHz for precision power quality analysis. |
Applications
| AC Motor Control | Uninterruptible Power Supply (UPS) |
|---|---|
Use Scenario: Real-time measurement of phase voltages and currents in three-phase inverters for field-oriented control (FOC). IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling captures voltage and current waveforms with preserved phase alignment for torque estimation. Use Value: 200 ps aperture delay matching ensures <0.01° phase error at 100 kHz, directly improving FOC loop stability and efficiency. |
Use Scenario: Monitoring input AC line voltage, battery DC bus, and output inverter voltage during transfer switching and harmonic distortion analysis. IC Role / Device Role / Timing Role: Simultaneous sampling of line and load voltages enables accurate RMS calculation and THD measurement without time skew. Use Value: –80 dB channel isolation prevents cross-coupling between high-voltage line sensing and low-level battery monitoring paths. |
| Data Acquisition Systems | Communications Baseband Processing |
Use Scenario: Modular industrial DAQ units acquiring vibration, temperature, and pressure signals from multiple sensors with synchronized timestamps. IC Role / Device Role / Timing Role: Two independent 12-bit ADCs reduce component count versus discrete solutions while maintaining channel independence. Use Value: ±1 LSB relative accuracy over –40°C to +85°C eliminates need for per-channel calibration in field-deployed systems. |
Use Scenario: Digitizing I/Q baseband signals from RF front-ends in software-defined radio (SDR) transceivers and broadband modems. IC Role / Device Role / Timing Role: Simultaneous sampling of in-phase (I) and quadrature (Q) analog paths preserves complex signal integrity for demodulation. Use Value: 70 dB SNR at 100 kHz supports 12-bit ENOB for QAM-64 and OFDM symbol recovery in fixed wireless applications. |
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-10 | 14-bit resolution, same SOIC-28 package, identical pinout and timing, but higher power (85 mW typ) and no internal reference (requires external 2.5 V source). | Used where higher dynamic range is required (e.g., audio test equipment), but not drop-in compatible due to reference dependency and increased supply current. | Select AD7863ARZ-10 only when 14-bit resolution justifies added board area for external reference and thermal management. |
| ADS8364IPAG | 6-channel simultaneous-sampling, 16-bit resolution, SPI interface, QFP-64 package - no pin or software compatibility. | Targets high-channel-count, high-precision applications like medical imaging or spectral analysis where parallel bus is not required. | Choose ADS8364IPAG for multi-channel systems needing >12-bit accuracy and SPI-based microcontroller integration, not as a direct replacement. |
Compared with AD7862BRZ-10REEL, AD7863ARZ-10 offers higher resolution at the cost of external reference dependency and increased power, while ADS8364IPAG provides six channels and 16-bit precision in a non-pin-compatible QFP package - neither serves as a drop-in substitute, but both address adjacent performance tiers in simultaneous-sampling ADC design.
Availability
AD7862BRZ-10REEL is available at Aetrix Electronics and suitable for AC motor control, uninterruptible power supplies, and industrial data acquisition systems requiring stable component supply, long-term obsolescence planning, and traceable sourcing for production ramp-up.
Supply support for AD7862BRZ-10REEL 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, founded in 1965 and headquartered in Wilmington, MA.
The AD7862 product line was designed specifically for industrial and instrumentation applications demanding synchronized dual-channel data acquisition with ±10 V input range, low latency, and robust operation across –40°C to +85°C.
FAQ
What is the input voltage range supported by the AD7862BRZ-10REEL?
The AD7862BRZ-10REEL supports a bipolar ±10 V analog input range across all four inputs (VA1, VA2, VB1, VB2), with overvoltage tolerance up to ±17 V. This range is fixed for the -10 variant and cannot be reconfigured to ±2.5 V or 0–2.5 V modes - those require different part numbers (AD7862-3 or AD7862-2). Input resistance is 24 kΩ minimum.
Does the AD7862BRZ-10REEL include an internal voltage reference?
Yes, the AD7862BRZ-10REEL integrates a laser-trimmed +2.5 V internal reference with ±10 mV accuracy at +25°C and ±25 mV maximum error over temperature. The VREF pin serves as both output (buffered, 2 kΩ source impedance) and input - an external 2.5 V reference can override the internal one if tighter tolerance is required.
How does the AD7862BRZ-10REEL handle simultaneous sampling of two channels?
The AD7862BRZ-10REEL uses a single CONVST falling edge to place both on-chip track-and-hold amplifiers into hold mode simultaneously, then performs independent conversions on Channel A (VA1/VA2) and Channel B (VB1/VB2). Aperture delay matching is 200 ps typical, ensuring phase coherence between sampled signals - essential for vector control and power quality analysis.
What package type is used for the AD7862BRZ-10REEL?
The AD7862BRZ-10REEL is supplied in a 28-lead Small Outline Integrated Circuit (SOIC) package with standard JEDEC MS-012AC dimensions (0.3-inch body width), RoHS-compliant lead finish, and tape-and-reel packaging (REEL suffix). It is pin-compatible with other AD7862-10 variants in SOIC (e.g., AD7862AR-10) and shares footprint with AD7863-10.
Can the AD7862BRZ-10REEL operate from a single +5 V supply?
Yes, the AD7862BRZ-10REEL operates exclusively from a single +5 V ±5% supply (VDD pin 24), powering both analog and digital sections. Typical supply current is 15 mA in normal mode and 25 µA in standby, yielding 60 mW typical power dissipation - eliminating need for dual-rail or negative supplies in industrial DAQ designs.
AD7862BRZ-10REEL 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:
- -
AD7862BRZ-10REEL FAQ
1.How can I place an order for AD7862BRZ-10REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7862BRZ-10REEL 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 AD7862BRZ-10REEL reliable?
The price and inventory of AD7862BRZ-10REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7862BRZ-10REEL is usually 5 days.
3.What payment methods are accepted for AD7862BRZ-10REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7862BRZ-10REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7862BRZ-10REEL?
AD7862BRZ-10REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7862BRZ-10REEL 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 AD7862BRZ-10REEL?
For technical support, including AD7862BRZ-10REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7862BRZ-10REEL requirements.
6.How does Aetrix verify that AD7862BRZ-10REEL is sourced from the original manufacturer or authorized distributors?
All AD7862BRZ-10REEL 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 AD7862BRZ-10REEL meets industry standards.
7.What is the process for return or replacement of AD7862BRZ-10REEL?
All AD7862BRZ-10REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7862BRZ-10REEL, 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 AD7862BRZ-10REEL part is unused and in its original packaging.
Return procedure for AD7862BRZ-10REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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