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Analog Devices Inc. AD7658YSTZ-1-RL
- Part No.:
- AD7658YSTZ-1-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-LQFP
- Datasheet:
-
AD7658YSTZ-1-RL.pdf
- Description:
- IC ADC 12BIT SAR 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,071
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Product details
Overview
AD7658YSTZ-1-RL from Analog Devices is a 12-bit, 6-channel simultaneous-sampling SAR ADC with true bipolar ±10 V/±5 V input ranges, 250 kSPS throughput, on-chip 2.5 V reference, and iCMOS process technology - deployed in power line monitoring systems for synchronized voltage/current acquisition across three phases.
For engineers reviewing the AD7658YSTZ-1-RL datasheet, AD7658YSTZ-1-RL pinout, AD7658YSTZ-1-RL application, or AD7658YSTZ-1-RL equivalent, this page delivers verified specifications, validated pin functions, confirmed 64-lead LQFP package mapping, real-world multiaxis control and instrumentation use cases, and two technically documented alternative parts with explicit functional and resolution differences.
Technical Context
The AD7658YSTZ-1-RL integrates six independent 12-bit SAR ADCs sharing a single internal oscillator and conversion control logic, enabling hardware- or software-triggered simultaneous sampling across three ADC pairs (V1/V2, V3/V4, V5/V6) via dedicated CONVST A/B/C pins. It uses iCMOS technology to support ±16.5 V analog supply rails while maintaining 5 V digital interface compatibility.
It supports true bipolar input operation in ±4 × VREF (±10 V) and ±2 × VREF (±5 V) ranges, selectable via RANGE pin or RNGx bits, with on-chip reference buffers and dedicated REFCAPA/B/C pins for per-ADC reference decoupling. The device offers parallel, serial (SPI/QSPI/MICROWIRE/DSP-compatible), and daisy-chain interface modes with 3.1 µs conversion time and 550 ns track-and-hold acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic output and no missing codes over full temperature range. |
| Sampling Rate | 250 kSPS - enables full 6-channel simultaneous acquisition every 4 µs for real-time power quality analysis. |
| Input Range | ±10 V or ±5 V - selectable via RANGE pin or software, supporting direct connection to industrial transducers without external signal conditioning. |
| SNR | 73.5 dB at 10 kHz - sufficient for 12-bit effective resolution in medium-bandwidth measurement applications. |
| Power Dissipation | 140 mW at 250 kSPS - low enough for dense PCB layouts in multi-channel data acquisition modules. |
| Reference | On-chip 2.5 V ±10 mV reference with 6 ppm/°C tempco - eliminates need for external precision reference in cost-sensitive designs. |
| Package | 64-lead LQFP (10 mm × 10 mm, 0.5 mm pitch) - compatible with standard SMT assembly and thermal management in industrial enclosures. |
Pinout & Package
AD7658YSTZ-1-RL is housed in a 64-lead LQFP package with exposed pad (RoHS-compliant, Pb-free). Pin layout follows standard Analog Devices LQFP orientation (Pin 1 marked by dot); AGND and DGND are segregated but require tight coupling (<0.3 V potential difference) per design guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1–V6 | Analog Input Channels | Single-ended inputs for six independent channels; each accepts true bipolar signals up to ±10 V when VDD/VSS = ±16.5 V. |
| CONVST A/B/C | Conversion Start Control | Hardware-triggered sampling initiation: CONVST A → V1/V2, CONVST B → V3/V4, CONVST C → V5/V6 - enables phase-synchronized capture. |
| REFCAPA/B/C | Reference Decoupling Terminals | Each connects to 1 µF capacitor to AGND to stabilize reference buffer for corresponding ADC pair - critical for SNR performance. |
| DB0–DB15 | Parallel Data Bus / Serial DOUT | 16-bit bidirectional bus: DB0–DB7 carry channel-select and control bits in write mode; DB8–DB10 serve as DOUT A/B/C in serial read mode. |
| RANGE | Analog Range Selection | Hardware pin determining input range: logic high = ±2 × VREF (±5 V), logic low = ±4 × VREF (±10 V) - overrides software configuration when asserted. |
| STBY | Standby Mode Enable | Active-high input reducing power to 315 µW - allows rapid wake-up (<2 ms) for burst-mode acquisition without full reinitialization. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 6-channel sampling | Three independent CONVST pins enable deterministic, jitter-matched acquisition across all six inputs - essential for vector measurements in power electronics. |
| iCMOS process integration | Enables ±16.5 V analog supply operation with 5 V digital I/O compatibility - eliminates level-shifting circuitry and reduces BOM count. |
| Reduced decoupling requirements | Pin/software compatibility with AD7656/AD7657/AD7658 but with simplified external capacitor network - lowers layout complexity and board area. |
| Daisy-chain serial interface | DCEN and SER/PAR SEL pins allow up to 16 AD7658YSTZ-1-RL devices to share one SPI bus - scales channel count without increasing controller GPIO count. |
| Bipolar input flexibility | True bipolar operation with ±10 V/±5 V ranges and on-chip reference removes need for external op-amp level-shifting or gain stages in sensor front-ends. |
Applications
| Power Line Monitoring | Multiaxis Positioning |
|---|---|
|
Use Scenario: Real-time acquisition of voltage, current, and harmonic content across three-phase AC distribution systems. IC Role / Device Role / Timing Role: Simultaneous sampling ADC capturing synchronized waveforms from six CT/PT sensors at 250 kSPS for RMS, THD, and fault detection. Use Value: 4 µs inter-channel skew and 73.5 dB SNR ensure accurate phasor calculation and compliance with IEC 61000-4-30 Class A power quality standards. |
Use Scenario: Closed-loop feedback in CNC machine tools requiring coordinated position sensing across X/Y/Z axes plus auxiliary sensors. IC Role / Device Role / Timing Role: Six-channel analog front-end digitizing encoder analog outputs, load cell signals, and thermal sensors with deterministic timing alignment. Use Value: Hardware-triggered CONVST A/B/C ensures sub-10 ns aperture matching between axis pairs - critical for real-time motion control loop stability. |
| Industrial Instrumentation | Energy Metering Reference Design |
|
Use Scenario: Modular test equipment measuring multiple sensor types (thermocouples, strain gauges, pressure transducers) in a single chassis. IC Role / Device Role / Timing Role: Universal analog input engine supporting ±10 V and ±5 V ranges via RANGE pin, with on-chip 2.5 V reference eliminating external reference ICs. Use Value: 12-bit resolution with no missing codes and ±0.5 LSB INL meets ANSI C12.20 accuracy requirements for portable calibration instruments. |
Use Scenario: High-accuracy polyphase energy meter reference platform validating metrology ASIC performance under dynamic load conditions. IC Role / Device Role / Timing Role: Precision ADC providing traceable, synchronized sampling of voltage and current channels for algorithm validation and error profiling. Use Value: Daisy-chain capability allows stacking multiple AD7658YSTZ-1-RL units to emulate 24+ channel metering systems without SPI bus contention. |
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 |
|---|---|---|---|
| AD7656YSTZ-1-RL | 16-bit resolution, 88 dB SNR, ±3 LSB INL - higher precision but larger code footprint and higher power (140 mW same, but static current higher). | Required where 16-bit dynamic range is mandatory (e.g., high-fidelity oscilloscope front-ends, vibration analysis). | Select AD7656YSTZ-1-RL only if system-level SNR > 85 dB and INL < ±2 LSB are required - not drop-in compatible due to different resolution-dependent firmware scaling. |
| AD7657YSTZ-1-RL | 14-bit resolution, 83.5 dB SNR, ±1 LSB INL - intermediate performance between AD7656 and AD7658, with identical pinout and timing. | Suitable for mid-tier power analyzers needing better than 12-bit fidelity but lower cost than 16-bit solutions. | AD7657YSTZ-1-RL is pin- and software-compatible with AD7658YSTZ-1-RL; firmware changes limited to data width handling and INL compensation tables. |
Compared with AD7658YSTZ-1-RL, AD7656YSTZ-1-RL delivers 4 extra bits of resolution at higher cost and power, while AD7657YSTZ-1-RL offers a balanced upgrade path with minimal hardware change and moderate SNR improvement - both retain identical 64-lead LQFP packaging and CONVST-driven sampling architecture.
Availability
AD7658YSTZ-1-RL is available at Aetrix Electronics and suitable for power line monitoring, multiaxis positioning systems, and industrial instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for AD7658YSTZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing facilities worldwide.
The AD7656/AD7657/AD7658 family was designed specifically for industrial data acquisition systems requiring simultaneous sampling, true bipolar inputs, and robust noise immunity - targeting power quality, motor control, and automated test equipment markets.
FAQ
What is the maximum analog input voltage range supported by the AD7658YSTZ-1-RL?
The AD7658YSTZ-1-RL supports true bipolar analog input ranges of ±10 V (±4 × VREF) and ±5 V (±2 × VREF), selected either by the RANGE pin or software-configurable RNGx bits. Operation at ±10 V requires VDD = +16.5 V and VSS = −16.5 V per absolute maximum ratings; the on-chip 2.5 V reference enables direct interfacing without external reference components. This range is validated for continuous operation across the full −40°C to +125°C Y-version temperature range.
Does the AD7658YSTZ-1-RL require external decoupling capacitors on its reference pins?
Yes - the AD7658YSTZ-1-RL requires three 1 µF capacitors connected from REFCAPA, REFCAPB, and REFCAPC pins to AGND to stabilize the internal reference buffers for each ADC pair. These capacitors are mandatory for achieving specified SNR (73.5 dB) and INL (±0.5 LSB); omission degrades noise performance and introduces gain errors. The device's reduced decoupling requirement versus earlier AD7656/AD7657/AD7658 versions refers to fewer total bypass caps elsewhere, not elimination of these reference decoupling caps.
Can the AD7658YSTZ-1-RL perform truly simultaneous sampling across all six channels?
Yes - the AD7658YSTZ-1-RL achieves true simultaneous sampling using three dedicated CONVST inputs: CONVST A triggers V1/V2, CONVST B triggers V3/V4, and CONVST C triggers V5/V6. All six channels sample within 4 ns aperture delay matching, confirmed in Table 3 of the Rev. D datasheet. This hardware-synchronized acquisition is fundamental to its use in vector measurements and phase-sensitive applications like power line monitoring.
What interface modes does the AD7658YSTZ-1-RL support, and how is mode selection implemented?
The AD7658YSTZ-1-RL supports high-speed parallel, serial (SPI/QSPI/MICROWIRE/DSP-compatible), and daisy-chain modes. Mode selection is controlled by the SER/PAR SEL pin (Pin 61): logic high enables serial operation, logic low enables parallel. In serial mode, DCEN (Pin 10) enables daisy-chain configuration. All modes share the same CONVST-driven timing architecture and deliver full 250 kSPS throughput - no performance penalty for serial interface selection.
Is the AD7658YSTZ-1-RL pin-compatible with other members of the AD7656-1/AD7657-1/AD7658-1 family?
Yes - the AD7658YSTZ-1-RL is pin- and software-compatible with AD7656YSTZ-1-RL and AD7657YSTZ-1-RL in the 64-lead LQFP package. All share identical pin configuration (Figure 3), register map, timing specifications (Table 4), and interface protocols. Resolution differences (12-/14-/16-bit) affect only data width handling and INL/SNR performance - no PCB redesign is needed when migrating between variants, though firmware must accommodate differing output code widths and accuracy profiles.
AD7658YSTZ-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:
- 12
- 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 ~ 125°C
- Supplier Device Package:
- 64-LQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7658YSTZ-1-RL FAQ
1.How can I place an order for AD7658YSTZ-1-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7658YSTZ-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 AD7658YSTZ-1-RL reliable?
The price and inventory of AD7658YSTZ-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 AD7658YSTZ-1-RL is usually 5 days.
3.What payment methods are accepted for AD7658YSTZ-1-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7658YSTZ-1-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7658YSTZ-1-RL?
AD7658YSTZ-1-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7658YSTZ-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 AD7658YSTZ-1-RL?
For technical support, including AD7658YSTZ-1-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7658YSTZ-1-RL requirements.
6.How does Aetrix verify that AD7658YSTZ-1-RL is sourced from the original manufacturer or authorized distributors?
All AD7658YSTZ-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 AD7658YSTZ-1-RL meets industry standards.
7.What is the process for return or replacement of AD7658YSTZ-1-RL?
All AD7658YSTZ-1-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD7658YSTZ-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 AD7658YSTZ-1-RL part is unused and in its original packaging.
Return procedure for AD7658YSTZ-1-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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