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Texas Instruments ADS8568SRGCR
- Part No.:
- ADS8568SRGCR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ADS8568SRGCR.pdf
- Description:
- IC ADC 16BIT SAR 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
ADS8568SRGCR from Texas Instruments is a 16-bit, 8-channel simultaneous-sampling SAR ADC with true bipolar inputs, 91.5 dB SNR, –94 dB THD, and 510 kSPS parallel / 400 kSPS serial data rate-designed for high-accuracy industrial power monitoring and protection relay signal chains.
For engineers reviewing the ADS8568SRGCR datasheet, ADS8568SRGCR pinout, ADS8568SRGCR application, or ADS8568SRGCR equivalent, key selection considerations include simultaneous sampling across four channel pairs, ±12 V input support via programmable reference, auto-sleep mode (32 mW at 10 kSPS), and dual 64-pin VQFN/LQFP packaging with extended –40°C to +125°C operation.
Technical Context
The ADS8568SRGCR implements eight independent SAR cores grouped into four synchronized channel pairs (A–D), each supporting true bipolar analog inputs up to ±12 V via internal 2.5-V/3.0-V reference with 10-bit DAC tuning. Conversion is initiated per pair using dedicated CONVST_A–D signals, enabling flexible staggered or fully simultaneous acquisition.
It supports both parallel (16-bit bidirectional bus) and serial (daisy-chainable SPI-compatible) interfaces, with hardware/software mode selection (HW/SW pin), configurable RANGE control per channel pair, and register-based configuration of reference buffers, standby, and clock sources-enabling precise system-level timing and power management in multi-channel isolation architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit-guarantees 1 LSB = 15.3 µV full-scale step size for ±10 V input range. |
| Max Data Rate (PAR/SER) | 510 / 400 kSPS per channel-supports real-time waveform capture at 50/60 Hz power systems with >8 samples per cycle. |
| Signal-to-Noise Ratio | 91.5 dB typ-enables >15-bit effective resolution in noise-sensitive protection relay applications. |
| Total Harmonic Distortion | –94 dB typ-ensures clean spectral representation for harmonic analysis up to 50th order. |
| Input Voltage Range | ±12 V max-compatible with standard industrial CT/PT sensor outputs without external scaling. |
| Reference Tuning | 0.5–2.5 V or 0.5–3.0 V via 10-bit internal DAC-allows precise gain calibration and offset trimming across temperature. |
| Operating Temperature | –40°C to +125°C-fully specified for harsh environments including outdoor substations and motor drive cabinets. |
Pinout & Package
ADS8568SRGCR is packaged in a 64-pin VQFN (9.0 mm × 9.0 mm) with exposed thermal pad, optimized for low-inductance analog grounding and thermal dissipation in high-density industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH_A0, CH_A1 | Analog input pair A | Master channel pair; must run at highest data rate when channel pairs operate asynchronously. |
| CONVST_A–D | Digital conversion trigger inputs | Rising-edge–sensitive; enables per-pair or fully synchronous sampling across all 8 channels. |
| REFIO, REFN | Reference voltage I/O | Configurable 2.5-V/3.0-V output or external reference input; supports ±12 V input scaling. |
| DB0–DB15 / SDO_A–SDO_D | Parallel data bus or serial daisy-chain outputs | 16-bit bidirectional parallel interface or 4-channel serial outputs with selectable SDO routing. |
| ASLEEP, STBY | Power management controls | Auto-sleep reduces power to 32 mW at 10 kSPS; STBY fully powers down reference and clocks. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling across 4 channel pairs | Eliminates phase skew between current/voltage measurements in power quality analyzers and protection relays. |
| Programmable internal reference (0.5–3.0 V) | Enables system-level calibration without external DACs or precision resistors-reducing BOM count and layout area. |
| Selectable parallel or serial interface | Parallel mode delivers maximum throughput; serial daisy-chain mode simplifies wiring in multi-ADC modular designs. |
| Auto-sleep mode (32 mW @ 10 kSPS) | Reduces average power by >90% during idle periods-critical for thermally constrained enclosures and fanless designs. |
| True bipolar ±12 V input capability | Directly interfaces with standard 5-A CTs and 110-V PTs without external level-shifting or op-amp circuitry. |
Applications
| Protection Relays | Power Quality Analyzers |
|---|---|
Use Scenario: Real-time detection of overcurrent, earth fault, and differential protection events in medium-voltage switchgear. IC Role / Device Role / Timing Role: Simultaneous sampling of 4 current and 4 voltage channels ensures sub-cycle phase alignment for accurate sequence component calculation. Use Value: 91.5 dB SNR and –94 dB THD enable reliable fault classification even under high-noise substation EMI conditions. | Use Scenario: Continuous monitoring of voltage sag/swell, harmonics, flicker, and interharmonics per IEEE 519 and IEC 61000-4-30 Class A. IC Role / Device Role / Timing Role: 16-bit resolution and 510 kSPS parallel throughput capture >256 points per 50/60 Hz cycle for compliant waveform recording. Use Value: Programmable reference allows dynamic range optimization across varying grid voltage levels without hardware change. |
| Multi-Axis Motor Drives | Programmable Logic Controllers |
Use Scenario: Closed-loop field-oriented control (FOC) requiring synchronized current sensing across 3-phase inverter legs and DC-link voltage. IC Role / Device Role / Timing Role: CONVST_A–D pins allow interleaved sampling of motor phase currents and bus voltage with deterministic latency. Use Value: Aperture jitter <50 ps and matching <100 ps ensure <0.1° phase error in torque estimation at 20 kHz PWM frequencies. | Use Scenario: High-speed analog I/O expansion for distributed control systems handling mixed-signal sensor inputs (temperature, pressure, position). IC Role / Device Role / Timing Role: Parallel interface with RD/CS/WR handshaking integrates directly with ARM Cortex-M or RISC-V MCU GPIO buses. Use Value: Auto-sleep mode reduces average power consumption below 50 mW-extending uptime in battery-backed or energy-harvested PLC modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8548SRGCR | 14-bit resolution, 85 dB SNR, 600/450 kSPS PAR/SER-lower noise floor and higher speed but reduced dynamic range. | Better suited for cost-sensitive motor control where 14-bit resolution suffices and higher throughput is needed. | Select when system SNR requirement is ≤85 dB and design prioritizes speed over ultimate precision. |
| AD7606BSTZ | 16-bit, 200 kSPS, on-chip 2.5-V reference, no internal DAC tuning-simpler configuration but fixed reference and lower throughput. | Ideal for space-constrained PLC analog input modules where daisy-chain simplicity outweighs sampling speed needs. | Choose when board area is critical and simultaneous sampling at >200 kSPS is not required. |
Compared with ADS8548SRGCR and AD7606BSTZ, the ADS8568SRGCR provides the highest SNR (91.5 dB) and widest programmable reference range (0.5–3.0 V), making it optimal for metrology-grade applications demanding both precision and flexibility-though at higher power and interface complexity.
Availability
ADS8568SRGCR is available at Aetrix Electronics and suitable for protection relays, power quality measurement systems, and multi-axis motor controls requiring stable component supply across extended industrial temperature ranges and long production lifecycles.
Supply support for ADS8568SRGCR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability silicon for industrial, automotive, and communications markets.
The ADS85x8 product line was engineered specifically for high-fidelity, multi-channel data acquisition in electric utility infrastructure-emphasizing simultaneous sampling integrity, wide input voltage tolerance, and robust operation from –40°C to +125°C.
FAQ
What is the maximum supported analog input voltage range for ADS8568SRGCR?
The ADS8568SRGCR supports true bipolar analog inputs up to ±12 V, achieved through its programmable internal reference (0.5–3.0 V) and RANGE pin or CONFIG register control. This allows direct interfacing with standard current transformers (CTs) and potential transformers (PTs) without external signal conditioning. The device maintains full 16-bit performance across this range when operated within recommended HVDD/HVSS supply limits (–16.5 V to +16.5 V).
Does ADS8568SRGCR support daisy-chained serial communication?
Yes, ADS8568SRGCR supports daisy-chained serial communication via its DB0–DB3 pins (DCIN_D/C/B/A) and SDO_A–SDO_D outputs. When DCEN = 1 and SEL_B/SEL_CD bits are configured, multiple ADS8568SRGCR devices can be cascaded on a single SPI bus, reducing digital routing complexity in multi-channel systems. Each device's SDO output feeds the next device's DCIN input, with frame synchronization managed by the FS pin.
How does the auto-sleep mode function in ADS8568SRGCR?
In ADS8568SRGCR, auto-sleep mode is enabled by driving the ASLEEP pin high. After a CONVST_x pulse, the device enters hold mode six conversion clock cycles later, reducing power consumption to 32 mW at 10 kSPS. This mode preserves configuration state and reference stability while minimizing idle current-ideal for intermittent sampling in battery-powered or thermally constrained industrial sensors. Exit is automatic upon next CONVST assertion.
What package options are available for ADS8568SRGCR?
The ADS8568SRGCR is offered exclusively in the 64-pin VQFN package (RGC suffix), measuring 9.0 mm × 9.0 mm with an exposed thermal pad. While the broader ADS85x8 family also includes a 64-pin LQFP option (PM package), the SRGCR variant is qualified only in VQFN-optimized for thermal performance and high-density PCB layouts in industrial control modules and metering equipment.
Can ADS8568SRGCR operate with an external reference instead of the internal one?
Yes, ADS8568SRGCR can operate with an external reference applied to the REFIO pin. When the REFEN/WR pin is held low (hardware mode) or CONFIG bit C15 = 0 (software mode), the internal reference is disabled and REFIO becomes a high-impedance input accepting 0.5–3.025 V. External references must meet specified input resistance (>100 MΩ), capacitance (<470 nF), and current sourcing requirements to maintain accuracy and stability across temperature.
ADS8568SRGCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- SPI, Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 64-VQFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8568SRGCR FAQ
1.How can I place an order for ADS8568SRGCR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8568SRGCR 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 ADS8568SRGCR reliable?
The price and inventory of ADS8568SRGCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8568SRGCR is usually 5 days.
3.What payment methods are accepted for ADS8568SRGCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8568SRGCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8568SRGCR?
ADS8568SRGCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8568SRGCR 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 ADS8568SRGCR?
For technical support, including ADS8568SRGCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8568SRGCR requirements.
6.How does Aetrix verify that ADS8568SRGCR is sourced from the original manufacturer or authorized distributors?
All ADS8568SRGCR 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 ADS8568SRGCR meets industry standards.
7.What is the process for return or replacement of ADS8568SRGCR?
All ADS8568SRGCR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8568SRGCR, 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 ADS8568SRGCR part is unused and in its original packaging.
Return procedure for ADS8568SRGCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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