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Analog Devices Inc. AD7656BSTZ-1-RL
- Part No.:
- AD7656BSTZ-1-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-LQFP
- Datasheet:
-
AD7656BSTZ-1-RL.pdf
- Description:
- IC ADC 16BIT SAR 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:633
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Product details
Overview
AD7656BSTZ-1-RL from Analog Devices is a 16-bit, 6-channel simultaneous-sampling SAR ADC with true bipolar ±10 V/±5 V input ranges, 250 kSPS throughput, 88 dB SNR at 10 kHz, and on-chip 2.5 V reference-designed for high-accuracy power line monitoring and multiaxis control systems.
For engineers reviewing the AD7656BSTZ-1-RL datasheet, AD7656BSTZ-1-RL pinout, AD7656BSTZ-1-RL application, or AD7656BSTZ-1-RL equivalent, this page delivers verified specifications, validated pin functions, confirmed interface modes (parallel/serial/daisy-chain), and real-world timing and noise performance data directly traceable to Rev. D datasheet.
Technical Context
The AD7656BSTZ-1-RL implements six independent iCMOS-based SAR cores with synchronized track-and-hold amplifiers, enabling simultaneous sampling across all six channels via three dedicated CONVST inputs (A/B/C). Its internal oscillator controls conversion timing, eliminating external clock dependency for basic operation.
It supports hardware- and software-selectable input ranges (±4×VREF or ±2×VREF), dual-supply analog rails (VDD/VSS up to ±16.5 V), and flexible digital interfacing-including high-speed parallel bus, SPI/QSPI/MICROWIRE-compatible serial mode, and daisy-chain capability for multi-ADC systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes-ensures monotonicity and full-scale fidelity in precision measurement applications. |
| Throughput Rate | 250 kSPS in parallel interface mode-supports real-time capture of fast transients in power quality analyzers. |
| SNR | 88 dB at 10 kHz input-enables accurate spectral analysis of harmonic content in 50/60 Hz power systems. |
| Analog Input Range | Pin/software-selectable ±10 V or ±5 V-matches industrial sensor outputs without external signal conditioning. |
| Reference | Integrated 2.5 V reference with 6 ppm/°C tempco and 150 ppm long-term stability-reduces BOM count and improves system drift performance. |
| Power Dissipation | 140 mW at 250 kSPS with 5 V supplies-enables thermally constrained designs in dense instrumentation modules. |
| Channel Isolation | −100 dB up to 100 kHz-prevents crosstalk between phases in 3-phase motor drive current sensing. |
Pinout & Package
AD7656BSTZ-1-RL is housed in a 64-lead LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow standard Analog Devices layout for the AD7656-1 family, with dedicated analog/digital ground separation, decoupling capacitor pins (REFCAPA/B/C), and dual supply domains (AVCC/DVCC/VDRIVE).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1–V6 | Analog Input Channels | Single-ended, high-impedance (10–14 pF) true bipolar inputs supporting ±10 V/±5 V ranges-directly interfaces with CT/PT outputs. |
| CONVST A/B/C | Conversion Start Control | Three independent TTL/CMOS-compatible inputs enabling staggered or simultaneous sampling of channel pairs (V1/V2, V3/V4, V5/V6). |
| DB0–DB15 | Parallel Data Bus | 16-bit bidirectional data lines supporting multiplexed read/write; DB8–DB10 double as DOUT A/B/C in serial mode. |
| SER/PAR SEL | Interface Mode Select | Hardware-configurable pin that routes internal logic to parallel bus or serial shift register-no firmware reconfiguration needed. |
| REFIN/REFOUT | Reference I/O | 2.5 V reference input/output with internal buffer; accepts external 2.5 V source or drives external circuitry with 18.5 pF capacitance. |
| STBY | Standby Enable | Active-high pin reducing power to 315 µW-enables rapid wake-up (<2 ms) for burst-mode acquisition in energy-efficient meters. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 6-channel sampling | Eliminates phase skew between voltage/current measurements in 3-phase power analyzers-critical for real-time RMS and power factor calculation. |
| iCMOS process technology | Enables ±16.5 V analog supply rails and true bipolar input operation within a compact LQFP package-replaces discrete op-amp front-ends. |
| Daisy-chain serial interface | Allows up to 8 AD7656BSTZ-1-RL devices to share one SPI bus with single CS, reducing microcontroller pin count and PCB routing complexity. |
| Reduced decoupling requirements | Requires only one 1 µF capacitor per REFCAP pin (A/B/C) and standard AVCC/DVCC decoupling-lowers layout risk and bill-of-materials cost vs. legacy AD7656. |
| On-chip reference buffers | Drives external circuitry (e.g., sensor excitation or calibration DACs) without additional op-amps-improves system-level accuracy and reduces thermal drift. |
Applications
| Power Line Monitoring | Industrial Motor Control |
|---|---|
Use Scenario: Real-time voltage, current, and harmonic analysis in smart grid protection relays and PQ analyzers. IC Role / Device Role / Timing Role: Simultaneous 6-channel acquisition of 3-phase voltage and current waveforms with sub-4 ns aperture matching. Use Value: Enables cycle-by-cycle RMS, THD, and sequence component calculation without inter-channel timing error. |
Use Scenario: Closed-loop current and position feedback in servo drives with multi-axis coordinated motion. IC Role / Device Role / Timing Role: Synchronized sampling of motor phase currents and encoder signals to eliminate torque ripple from timing skew. Use Value: Improves field-oriented control (FOC) accuracy by preserving phase relationships across all measured variables. |
| Test & Measurement Equipment | Energy Metering Systems |
Use Scenario: Multi-channel waveform capture in portable oscilloscopes and automated test equipment. IC Role / Device Role / Timing Role: High-fidelity digitization of fast transients (4.5 MHz full-power bandwidth) with 88 dB SNR. Use Value: Supports 16-bit resolution at 250 kSPS without external decimation-reducing FPGA processing load. |
Use Scenario: Revenue-grade polyphase metering with anti-tampering diagnostics and harmonic compliance (IEC 62053-22). IC Role / Device Role / Timing Role: Simultaneous sampling of voltage and current per phase to compute active/reactive power with <0.1% error. Use Value: Meets Class 0.2 accuracy requirements using integrated reference and matched channel gain/offset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7656BSTZ-RL | Original AD7656 (not -1 revision); requires more decoupling capacitance and lacks reduced BOM optimizations. | Same 16-bit resolution and timing, but higher layout sensitivity and greater power in partial power-down mode (40 mW vs. 40 mW same, but STBY current 60 µA vs. 60 µA). | Select AD7656BSTZ-1-RL when minimizing decoupling components and improving layout robustness are priorities. |
| AD7657BSTZ-1-RL | 14-bit version with identical pinout, timing, and interface-but lower SNR (83.5 dB) and relaxed INL (±1 LSB). | Better suited for cost-sensitive motor control where 14-bit resolution suffices and 16-bit noise floor is unnecessary. | Choose AD7656BSTZ-1-RL over AD7657BSTZ-1-RL when harmonic distortion analysis or Class 0.2 metering mandates 16-bit fidelity. |
Compared with AD7656BSTZ-RL, the AD7656BSTZ-1-RL delivers identical performance with simplified power delivery; versus AD7657BSTZ-1-RL, it provides 4.5 dB SNR improvement and tighter DC accuracy-justifying its use in metrology-critical rather than cost-optimized systems.
Availability
AD7656BSTZ-1-RL is available at Aetrix Electronics and suitable for power line monitoring, industrial motor control, test equipment, and revenue-grade energy metering requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for AD7656BSTZ-1-RL 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.
The AD7656-1 family was designed specifically for high-accuracy, multichannel simultaneous-sampling applications in power quality, industrial automation, and precision instrumentation-leveraging iCMOS to integrate high-voltage analog front-ends with low-power digital interfaces.
FAQ
What is the maximum analog input frequency supported by the AD7656BSTZ-1-RL?
The AD7656BSTZ-1-RL has a full-power bandwidth of 4.5 MHz at −3 dB and 2.2 MHz at −0.1 dB, enabling accurate digitization of fast transients and harmonics up to the 73rd harmonic of 60 Hz mains. This specification is measured with the internal track-and-hold amplifier and applies across all six channels simultaneously.
Does the AD7656BSTZ-1-RL require an external reference?
No-the AD7656BSTZ-1-RL includes an integrated 2.5 V reference with 6 ppm/°C temperature coefficient and 150 ppm long-term stability. It can operate fully self-contained, though the REFIN/REFOUT pin allows connection to a higher-precision external reference if required for metrology-grade applications.
How does the AD7656BSTZ-1-RL handle simultaneous sampling across all six channels?
The AD7656BSTZ-1-RL uses three dedicated CONVST inputs (A, B, C) to trigger simultaneous conversions on channel pairs: CONVST A for V1/V2, CONVST B for V3/V4, and CONVST C for V5/V6. Aperture delay matching is guaranteed at ≤4 ns, ensuring phase coherence critical for power calculations.
What digital interface modes does the AD7656BSTZ-1-RL support?
The AD7656BSTZ-1-RL supports high-speed parallel (16-bit multiplexed bus), serial (SPI/QSPI/MICROWIRE-compatible), and daisy-chain modes. Interface selection is controlled by the SER/PAR SEL pin, and serial operation supports up to eight devices on a single bus using the DCEN and DCIN pins.
Is the AD7656BSTZ-1-RL pin-compatible with earlier AD7656 variants?
Yes-the AD7656BSTZ-1-RL is pin- and software-compatible with the original AD7656, AD7657, and AD7658 families, but features reduced decoupling requirements and optimized power delivery. No PCB changes are required when upgrading from AD7656BSTZ-RL to AD7656BSTZ-1-RL.
AD7656BSTZ-1-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCMOS®
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 6
- Input Type:
- Single Ended
- Data Interface:
- SPI, Parallel, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 6
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Simultaneous Sampling, True Bipolar
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-LQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7656BSTZ-1-RL FAQ
1.How can I place an order for AD7656BSTZ-1-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7656BSTZ-1-RL 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 AD7656BSTZ-1-RL reliable?
The price and inventory of AD7656BSTZ-1-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7656BSTZ-1-RL is usually 5 days.
3.What payment methods are accepted for AD7656BSTZ-1-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7656BSTZ-1-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7656BSTZ-1-RL?
AD7656BSTZ-1-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7656BSTZ-1-RL 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 AD7656BSTZ-1-RL?
For technical support, including AD7656BSTZ-1-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7656BSTZ-1-RL requirements.
6.How does Aetrix verify that AD7656BSTZ-1-RL is sourced from the original manufacturer or authorized distributors?
All AD7656BSTZ-1-RL 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 AD7656BSTZ-1-RL meets industry standards.
7.What is the process for return or replacement of AD7656BSTZ-1-RL?
All AD7656BSTZ-1-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD7656BSTZ-1-RL, 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 AD7656BSTZ-1-RL part is unused and in its original packaging.
Return procedure for AD7656BSTZ-1-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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