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Analog Devices Inc. AD7658YSTZ-1
- Part No.:
- AD7658YSTZ-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-LQFP
- Datasheet:
-
AD7658YSTZ-1.pdf
- Description:
- IC ADC 12BIT SAR 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:118
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Product details
Overview
AD7658YSTZ-1 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, and integrated 2.5 V reference-designed for multiaxis motor control feedback loops requiring synchronized voltage/current acquisition.
For engineers reviewing the AD7658YSTZ-1 datasheet, AD7658YSTZ-1 pinout, AD7658YSTZ-1 application, or AD7658YSTZ-1 equivalent, this page delivers verified specifications, validated pin functions, confirmed interface modes (parallel/serial/daisy-chain), and real-world use context for power line monitoring, instrumentation, and motion control systems.
Technical Context
The AD7658YSTZ-1 implements six independent 12-bit successive approximation register (SAR) cores on iCMOS process technology, enabling ±16.5 V analog supply operation and true bipolar signal handling without external level-shifting. Its three CONVST inputs (A/B/C) support hardware-triggered simultaneous sampling across three ADC pairs (V1/V2, V3/V4, V5/V6).
It integrates on-chip reference buffers and supports both internal 2.5 V reference (±2 ppm/°C drift) and external reference modes, with configurable input ranges via RANGE pin or software-controlled RNGx bits. The device offers high-speed parallel, SPI/QSPI/MICROWIRE-compatible serial, and daisy-chain interface options-all operating at up to 18 MHz SCLK.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit-guarantees no missing codes and sufficient dynamic range for industrial current sensing and position feedback. |
| Sampling Rate | 250 kSPS-enables full-bandwidth capture of 4.5 MHz analog signals per channel in track-and-hold mode. |
| Input Range | ±4 × VREF (±10 V) or ±2 × VREF (±5 V)-supports direct connection to industrial transducers without external gain/attenuation. |
| SNR | 73.5 dB at 10 kHz-provides >12 ENOB for accurate RMS measurement in power quality analyzers. |
| Power Dissipation | 140 mW at 250 kSPS-achieved with iCMOS process, reducing thermal load in dense PCB layouts. |
| Reference | On-chip 2.5 V ±25 ppm/°C-eliminates need for external precision reference in cost-sensitive designs. |
| Interface Modes | Parallel, serial (SPI/QSPI/MICROWIRE), daisy-chain-enables flexible host processor integration with minimal GPIO overhead. |
Pinout & Package
AD7658YSTZ-1 is housed in a 64-lead LQFP package (10 mm × 10 mm, 0.5 mm pitch) with separate analog/digital ground planes and dedicated reference decoupling pins (REFCAPA/B/C) for optimal noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1–V6 | Analog Input Channels | Single-ended, high-impedance (10 pF) inputs supporting ±10 V/±5 V ranges; each pair (V1/V2, etc.) shares one CONVST trigger. |
| CONVST A/B/C | Conversion Start Inputs | Independent TTL/CMOS-compatible triggers enabling hardware-synchronized sampling across three ADC pairs. |
| DB0–DB15 | Data Bus / Serial Output | 16-bit parallel data bus (DB0–DB15); DB8/DOUT A, DB9/DOUT B, DB10/DOUT C serve as serial outputs in daisy-chain mode. |
| REFIN/REFOUT | Reference I/O | 2.5 V reference input/output with 18.5 pF capacitance; enables internal reference use or external reference override. |
| RANGE / H/S SEL / SER/PAR SEL | Configuration Control | Hardware-selectable input range (RANGE), serial/parallel mode (SER/PAR SEL), and high-speed vs. low-power mode (H/S SEL). |
| STBY | Standby Enable | Active-high pin reducing power to 315 µW-critical for energy-constrained portable test equipment. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 6-channel sampling | Three independent CONVST inputs enable deterministic phase alignment across all channels-essential for vector control in servo drives. |
| iCMOS process architecture | Enables ±16.5 V analog supplies with sub-100 ns aperture jitter (35 ps typical), eliminating need for isolated DC/DC converters in high-voltage industrial interfaces. |
| Integrated reference buffer | Drives 1 µF decoupling capacitors on REFCAPA/B/C pins-reduces layout sensitivity and eliminates external op-amp buffer requirements. |
| Daisy-chain serial interface | Allows up to 4 AD7658YSTZ-1 devices to share one SPI bus with single CS-scales channel count without increasing host MCU pin count. |
| True bipolar input capability | Accepts ±10 V directly without external op-amps or level shifters-simplifies front-end design for AC motor current sensing and power line monitoring. |
Applications
| Power Line Monitoring | Multiaxis Positioning Systems |
|---|---|
Use Scenario: Real-time acquisition of voltage, current, and harmonic content across three-phase distribution panels. IC Role / Device Role / Timing Role: Simultaneous 6-channel sampling captures synchronized line-to-line voltages and phase currents for FFT-based power quality analysis. Use Value: 250 kSPS throughput and 4.5 MHz full-power bandwidth ensure accurate capture of 50th harmonic (2.5 kHz) with margin for anti-alias filtering. |
Use Scenario: Closed-loop feedback for X-Y-Z stage controllers in CNC machines and semiconductor wafer handlers. IC Role / Device Role / Timing Role: Simultaneous sampling of encoder signals, motor phase currents, and temperature sensors across multiple axes. Use Value: Sub-4 ns aperture delay matching between channels ensures <10 arc-second angular error in high-precision motion control. |
| Industrial Instrumentation | Motor Drive Current Sensing |
Use Scenario: Modular data acquisition units measuring strain, pressure, and temperature in factory automation systems. IC Role / Device Role / Timing Role: 12-bit resolution with ±0.95% FSR full-scale error provides 0.025% reading accuracy over −40°C to +125°C (Y-grade). Use Value: On-chip 2.5 V reference and ±1 µA input leakage enable direct connection to 100 Ω RTDs and 350 Ω strain gauges without calibration drift. |
Use Scenario: Shunt-based phase current measurement in 3-phase IGBT inverters for HVAC and traction drives. IC Role / Device Role / Timing Role: True bipolar ±10 V input range accepts differential shunt amplifier outputs without level-shifting circuitry. Use Value: 73.5 dB SNR at 10 kHz enables 12-bit effective resolution for 100 A peak current sensing with <0.1% linearity error. |
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 | 16-bit resolution, 88 dB SNR, higher power (140 mW same), identical pinout and interface | Required where >90 dB dynamic range needed for vibration analysis or audio test equipment | Select when ENOB >14 is mandatory; retains same PCB layout and firmware interface. |
| AD7657YSTZ-1 | 14-bit resolution, 82.5 dB SNR, intermediate performance between AD7656-1 and AD7658-1 | Suitable for mid-tier PLC analog input modules needing better than 12-bit but lower cost than 16-bit | Choose for balanced cost/performance in programmable logic controller I/O cards. |
Compared with AD7656YSTZ-1 and AD7657YSTZ-1, the AD7658YSTZ-1 trades resolution and SNR for lower system cost and reduced decoupling complexity-making it optimal for high-volume industrial controls where 12-bit fidelity meets functional safety requirements.
Availability
AD7658YSTZ-1 is available at Aetrix Electronics and suitable for power line monitoring, multiaxis positioning systems, and industrial instrumentation requiring stable component supply across extended temperature ranges (−40°C to +125°C).
Supply support for AD7658YSTZ-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, headquartered in Wilmington, MA.
The AD765x-1 family-including AD7658YSTZ-1-is engineered for industrial data acquisition where simultaneous sampling, bipolar input tolerance, and robust iCMOS process reliability are critical.
FAQ
What is the maximum analog input frequency supported by AD7658YSTZ-1?
The AD7658YSTZ-1 supports a full-power bandwidth of 4.5 MHz at −3 dB, enabling accurate digitization of signals up to this frequency when using the internal track-and-hold amplifier. This specification is confirmed in the "Dynamic Performance" section of the Rev. D datasheet, Table 3, and applies under standard operating conditions (250 kSPS, ±10 V range, AVCC = DVCC = 5.25 V). For reliable anti-aliasing, input signals should be band-limited to ≤2.2 MHz (−0.1 dB point) in high-fidelity applications.
Does AD7658YSTZ-1 require external decoupling capacitors on REFCAP pins?
Yes, AD7658YSTZ-1 requires a 1 µF capacitor connected from each of REFCAPA, REFCAPB, and REFCAPC to AGND, as specified in the Pin Function Descriptions (Table 7, Page 11). These capacitors stabilize the internal reference buffers for each ADC pair and are mandatory for achieving rated SNR and integral nonlinearity. Omitting them degrades reference noise rejection and increases code transition errors beyond ±0.5 LSB.
Can AD7658YSTZ-1 operate with only the internal 2.5 V reference enabled?
Yes, AD7658YSTZ-1 can operate using only its internal 2.5 V reference. The device powers up with REFEN/DIS = 1 (pin 63), enabling the internal reference by default. No external reference connection is required unless higher stability (<6 ppm/°C) or custom voltage (e.g., 3.0 V) is needed. The internal reference delivers 2.49–2.51 V output with 150 ppm long-term drift over 1000 hours.
What is the function of the H/S SEL pin on AD7658YSTZ-1?
The H/S SEL pin (Pin 62) configures AD7658YSTZ-1 between high-speed and low-power operational modes. When H/S SEL = 0, the device operates at full 250 kSPS with 140 mW dissipation; when H/S SEL = 1, conversion rate drops to 100 kSPS and power reduces to ~56 mW. This pin allows dynamic trade-off between throughput and thermal budget in battery-powered or thermally constrained applications.
Is AD7658YSTZ-1 pin-compatible with AD7656-1 or AD7657-1?
Yes, AD7658YSTZ-1 is pin- and software-compatible with AD7656-1 and AD7657-1, as explicitly stated in the "Features" section of the datasheet. All three share identical 64-lead LQFP footprint, identical pin functions (including CONVST A/B/C, DB0–DB15, STBY, SER/PAR SEL), and compatible register maps-allowing drop-in replacement in existing designs when resolution requirements permit.
AD7658YSTZ-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCMOS®
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- 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 FAQ
1.How can I place an order for AD7658YSTZ-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7658YSTZ-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 AD7658YSTZ-1 reliable?
The price and inventory of AD7658YSTZ-1 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 is usually 5 days.
3.What payment methods are accepted for AD7658YSTZ-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7658YSTZ-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7658YSTZ-1?
AD7658YSTZ-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7658YSTZ-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 AD7658YSTZ-1?
For technical support, including AD7658YSTZ-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7658YSTZ-1 requirements.
6.How does Aetrix verify that AD7658YSTZ-1 is sourced from the original manufacturer or authorized distributors?
All AD7658YSTZ-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 AD7658YSTZ-1 meets industry standards.
7.What is the process for return or replacement of AD7658YSTZ-1?
All AD7658YSTZ-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7658YSTZ-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 AD7658YSTZ-1 part is unused and in its original packaging.
Return procedure for AD7658YSTZ-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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