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Analog Devices Inc. AD7656BSTZ-1
- Part No.:
- AD7656BSTZ-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-LQFP
- Datasheet:
-
AD7656BSTZ-1.pdf
- Description:
- IC ADC 16BIT SAR 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:408
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Product details
Overview
AD7656BSTZ-1 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, and on-chip 2.5 V reference-designed for high-accuracy power line monitoring and multiaxis control systems.
For engineers reviewing the AD7656BSTZ-1 datasheet, AD7656BSTZ-1 pinout, AD7656BSTZ-1 application, or AD7656BSTZ-1 equivalent, this page delivers verified specifications, validated pin functions, confirmed iCMOS® process advantages, and real-world interface timing for parallel/serial/daisy-chain operation.
Technical Context
The AD7656BSTZ-1 integrates six independent 16-bit SAR cores on a single iCMOS® die, enabling true simultaneous sampling across all six channels via three dedicated CONVST inputs (A/B/C), each controlling two ADCs. Its track-and-hold supports up to 4.5 MHz full-power bandwidth with 35 ps aperture jitter and 4 ns aperture delay matching.
It features dual-mode interface selection (SER/PAR SEL), hardware/software-configurable input ranges (±4×VREF or ±2×VREF), and integrated reference buffers with 2.49–2.51 V output, 6 ppm/°C tempco, and 150 ppm long-term stability-enabling precision measurement without external reference circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits with no missing codes-guarantees monotonicity and full-scale fidelity in high-dynamic-range measurements. |
| Throughput Rate | 250 kSPS in parallel mode-supports real-time capture of fast transients in power quality analyzers. |
| SNR / SINAD | 88 dB at 10 kHz-enables >14 ENOB for clean spectral analysis in instrumentation applications. |
| Analog Input Range | Pin- or software-selectable ±10 V or ±5 V-simplifies front-end design by eliminating external gain switching. |
| Reference | On-chip 2.5 V reference with 6 ppm/°C drift-reduces BOM count and improves thermal tracking vs. external references. |
| Power Dissipation | 140 mW at 250 kSPS-achieves high performance with low thermal load in dense PCB layouts. |
| Channel Isolation | −100 dB up to 100 kHz-ensures crosstalk-free acquisition in multichannel motor current sensing. |
Pinout & Package
AD7656BSTZ-1 is housed in a 64-lead LQFP package (10 mm × 10 mm, 0.5 mm pitch) with separate analog/digital grounds and dedicated reference decoupling pins (REFCAPA/B/C) for optimal noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1–V6 | Analog Inputs | Single-ended, high-impedance (±1 µA leakage) true bipolar inputs supporting ±10 V/±5 V ranges. |
| CONVST A/B/C | Conversion Start | Independent edge-triggered controls for simultaneous sampling of channel pairs (V1/V2, V3/V4, V5/V6). |
| DB0–DB15 | Data Bus / Serial Outputs | 16-bit parallel data outputs or daisy-chain serial DOUT A/B/C-enables flexible microprocessor/DSP interfacing. |
| REFCAPA/B/C | Reference Decoupling | Each connects to AGND via 1 µF capacitor-stabilizes internal reference buffers per ADC pair to suppress crosstalk. |
| AVCC / DVCC / VDRIVE | Supply Rails | Separate 4.75–5.25 V analog/digital supplies plus logic-level VDRIVE (2.7–5.25 V)-isolates noise-sensitive analog core. |
| AGND / DGND | Ground Planes | 11 AGND and 2 DGND pins-require star grounding with ≤0.3 V potential difference to maintain DC accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 6-channel sampling | Eliminates phase skew between voltage/current measurements in power analyzers and motor drives. |
| iCMOS® process technology | Enables ±16.5 V analog supply rails and true bipolar inputs while maintaining sub-100 mW power at 5 V AVCC/DVCC. |
| Hardware/software range selection | RANGE pin or RNGx register bits configure ±10 V/±5 V full-scale-removes need for external range-switching circuitry. |
| Daisy-chain serial interface | Allows multiple AD7656BSTZ-1 devices to share one SPI bus-reduces host GPIO count in modular DAQ systems. |
| Low-power standby mode | 315 µW consumption (STBY = high)-extends uptime in battery-backed power monitoring nodes. |
Applications
| Power Line Monitoring | Industrial Instrumentation |
|---|---|
Use Scenario: Real-time voltage, current, and harmonic analysis in 3-phase smart meters and PQ analyzers. IC Role / Device Role / Timing Role: Simultaneous 6-channel acquisition captures synchronized line-to-line and line-to-neutral waveforms with <4 ns inter-channel skew. Use Value: Enables IEC 61000-4-30 Class A compliance via guaranteed 250 kSPS throughput and 88 dB SNR at 10 kHz. |
Use Scenario: High-precision sensor data logging in automated test equipment and calibration rigs. IC Role / Device Role / Timing Role: 16-bit SAR converter with on-chip 2.5 V reference serves as primary digitizer for multi-sensor analog front ends. Use Value: Delivers ±0.35% FSR full-scale error matching and 6 ppm/°C reference stability-reducing system-level calibration frequency. |
| Multiaxis Motion Control | Energy Management Systems |
Use Scenario: Current and position feedback acquisition in servo drives with 3-phase motor + encoder interfaces. IC Role / Device Role / Timing Role: Six independent ADCs sample motor phase currents (V1–V3) and resolver/encoder signals (V4–V6) in lockstep. Use Value: −100 dB channel-to-channel isolation prevents torque ripple from coupling into position loops during high-dV/dt switching. |
Use Scenario: Distributed energy monitoring in solar inverters and EV charging stations with grid-tie synchronization. IC Role / Device Role / Timing Role: Simultaneous sampling of AC voltage, current, and DC link voltage enables precise power factor and efficiency calculation. Use Value: 250 kSPS throughput and 4.5 MHz full-power bandwidth support IEEE 1547 anti-islanding detection waveform capture. |
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 | Original version with higher decoupling requirements; identical pinout and firmware compatibility but lacks reduced-decoupling optimization. | Same functional scope but requires additional 0.1 µF + 10 µF per REFCAP versus AD7656BSTZ-1's simplified 1 µF only. | Select AD7656BSTZ-1 when minimizing BOM cost and layout area is critical; use AD7656BSTZ only if legacy design reuse mandates identical decoupling scheme. |
| LTC2358-16 | 8-channel, 16-bit, 200 kSPS; uses different serial interface (no daisy-chain), no on-chip reference, and requires external ±12 V supplies for ±10 V range. | Higher channel count but lower throughput and no integrated reference-increases external component count and reduces system-level SNR. | Choose LTC2358-16 only when 8-channel density outweighs need for simultaneous 6-channel sync and reference integration. |
Compared with AD7656BSTZ and LTC2358-16, the AD7656BSTZ-1 uniquely combines 6-channel simultaneity, on-chip 2.5 V reference, and reduced decoupling-making it optimal for space-constrained, high-accuracy power monitoring where BOM simplification and thermal management are critical.
Availability
AD7656BSTZ-1 is available at Aetrix Electronics and suitable for power line monitoring, industrial instrumentation, multiaxis motion control, and energy management systems requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for AD7656BSTZ-1 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7656BSTZ-1 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for high-channel-count, simultaneous-sampling applications demanding low noise, excellent DC accuracy, and robust bipolar input capability.
FAQ
What is the maximum analog input frequency supported by the AD7656BSTZ-1?
The AD7656BSTZ-1 supports a full-power bandwidth of 4.5 MHz at −3 dB, enabling accurate digitization of signals up to that frequency. Its 10 kHz sinusoidal test condition yields 88 dB SNR, and its 35 ps aperture jitter ensures minimal sampling uncertainty for high-frequency transient capture in power quality applications.
Does the AD7656BSTZ-1 require an external reference?
No-the AD7656BSTZ-1 includes an integrated 2.5 V reference with 2.49–2.51 V output, 6 ppm/°C temperature coefficient, and 150 ppm long-term stability. External reference is optional and only needed when higher initial accuracy or custom voltage levels are required; the internal reference eliminates BOM components and improves thermal tracking.
How does the AD7656BSTZ-1 achieve simultaneous sampling across six channels?
The AD7656BSTZ-1 uses three dedicated CONVST inputs (A, B, C), each triggering two independent ADCs: CONVST A samples V1/V2, CONVST B samples V3/V4, and CONVST C samples V5/V6. This architecture guarantees sub-4 ns aperture delay matching between paired channels and eliminates time-skew errors in multichannel synchronized acquisition.
Can the AD7656BSTZ-1 operate with a 3.3 V digital interface?
Yes-the VDRIVE pin accepts 2.7 V to 5.25 V, allowing direct interfacing with 3.3 V microcontrollers or FPGAs. Logic thresholds scale with VDRIVE (VINH = 0.7×VDRIVE, VINL = 0.3×VDRIVE), and output drivers meet 3.3 V-compatible VOH/VOL specs-enabling seamless integration without level-shifting circuitry.
What is the purpose of the REFCAPA, REFCAPB, and REFCAPC pins on the AD7656BSTZ-1?
REFCAPA, REFCAPB, and REFCAPC are dedicated decoupling terminals for the internal reference buffers driving each ADC pair (V1/V2, V3/V4, V5/V6). Each must be connected to AGND with a 1 µF capacitor-this local decoupling suppresses reference noise coupling between channels and maintains the −100 dB channel-to-channel isolation specification.
AD7656BSTZ-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCMOS®
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- 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 FAQ
1.How can I place an order for AD7656BSTZ-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7656BSTZ-1 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 reliable?
The price and inventory of AD7656BSTZ-1 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 is usually 5 days.
3.What payment methods are accepted for AD7656BSTZ-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7656BSTZ-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7656BSTZ-1?
AD7656BSTZ-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7656BSTZ-1 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?
For technical support, including AD7656BSTZ-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7656BSTZ-1 requirements.
6.How does Aetrix verify that AD7656BSTZ-1 is sourced from the original manufacturer or authorized distributors?
All AD7656BSTZ-1 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 meets industry standards.
7.What is the process for return or replacement of AD7656BSTZ-1?
All AD7656BSTZ-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7656BSTZ-1, 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 part is unused and in its original packaging.
Return procedure for AD7656BSTZ-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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