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Texas Instruments ADS8528SRGCT
- Part No.:
- ADS8528SRGCT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ADS8528SRGCT.pdf
- Description:
- IC ADC 12BIT SAR 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:513
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Product details
Overview
ADS8528SRGCT from Texas Instruments is a 12-bit, 8-channel simultaneous-sampling SAR analog-to-digital converter with true bipolar ±12 V input capability, 73.9 dB SNR, –89 dB THD, and 650 kSPS parallel interface data rate - deployed in protection relays and power quality analyzers requiring synchronized multi-channel acquisition.
For engineers reviewing the ADS8528SRGCT datasheet, ADS8528SRGCT pinout, ADS8528SRGCT application, or ADS8528SRGCT equivalent, this page delivers verified electrical specs, validated VQFN-64 pin mapping, thermal performance at –40°C to +125°C, and real-world implementation guidance for industrial data acquisition systems.
Technical Context
The ADS8528SRGCT implements eight independent SAR ADC cores grouped into four channel pairs (A–D), each supporting simultaneous sampling triggered by dedicated CONVST_x inputs. Its internal programmable reference DAC (10-bit, 0.5–2.5 V or 0.5–3.0 V) enables configurable full-scale ranges of ±2×VREF or ±4×VREF via hardware RANGE pin or software CONFIG register bits.
It supports dual-mode digital interfacing: 16-bit parallel bus (with CS, RD, WR, PAR/SER control) or daisy-chainable SPI-compatible serial interface (SCLK, SDI, SDO_A–D, FS), with auto-sleep mode reducing power to 32 mW at 10 kSPS. All timing and conversion logic is fully specified across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR architecture - delivers 1 LSB = 0.0244% of full-scale range, sufficient for Class 0.2 metering and relay trip threshold detection. |
| Max Data Rate (Parallel) | 650 kSPS per channel - supports 1.6 μs conversion time for all 8 channels simultaneously, enabling 625 ns inter-channel sampling skew control. |
| Signal-to-Noise Ratio | 73.9 dB (typ) at 25°C - corresponds to effective resolution of ~12.0 bits, validated over –40°C to +125°C with <0.3 dB degradation. |
| Total Harmonic Distortion | –89 dB (typ) - ensures <0.0035% THD+N, critical for accurate harmonic analysis in power quality monitoring. |
| Analog Input Range | ±12 V maximum - achieved using HVDD = 15 V / HVSS = –15 V supplies and internal reference scaling, eliminating external signal conditioning for most industrial sensors. |
| Reference Flexibility | Programmable 10-bit internal DAC (0.5–2.5 V or 0.5–3.0 V) - allows dynamic full-scale adjustment without external components, supporting ±2 VREF or ±4 VREF input configurations. |
| Operating Temperature | –40°C to +125°C - fully characterized across this range for junction temperatures, with RθJA = 22°C/W (VQFN-64), enabling convection-cooled industrial enclosure deployment. |
Pinout & Package
ADS8528SRGCT is housed in a 64-pin VQFN package (9.0 mm × 9.0 mm, 0.5 mm pitch) with exposed thermal pad for enhanced heat dissipation. Pin functions are validated per TI SBAS543C Rev C (February 2016), supporting both hardware- and software-configurable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH_A0, CH_A1 | Analog input pair A | Master channel pair; always active and sets timing baseline for all other pairs when used at differing data rates. |
| CONVST_A–D | Dedicated conversion start inputs | Independent rising-edge triggers enable flexible staggered or fully synchronous sampling across 4 channel groups. |
| DB0–DB15/SDO_A–D | Parallel data I/O or serial daisy-chain outputs | Configurable 16-bit parallel bus or up to four independent serial outputs (SDO_A–D) for multi-device synchronization. |
| RANGE/XCLK | Hardware range select or clock I/O | In hardware mode: selects ±2×VREF (high) or ±4×VREF (low); in software mode: serves as external clock input or internal clock output. |
| REFIO, REFN | Reference voltage I/O | Internal reference output (REFIO) and negative reference return (REFN) support buffered ±2.5 V or ±3.0 V reference generation with 10 ppm/°C drift. |
| HVDD, HVSS | Analog input supply rails | Separate high-voltage supplies (–16.5 V to +16.5 V) isolate precision analog front-end from digital noise and enable ±12 V input swing. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 8-channel sampling | Four independent CONVST_x inputs allow deterministic, sub-100 ps aperture matching across all channels - essential for vector measurements in three-phase power systems. |
| Programmable internal reference DAC | 10-bit resolution (0.5–2.5 V or 0.5–3.0 V range) enables runtime full-scale calibration and sensor range adaptation without external DAC or op-amps. |
| Selectably buffered reference outputs | REFBUFEN pin or CONFIG bit C14 controls on-chip buffer enable - eliminates need for external op-amp buffers while maintaining <10 ppm/°C drift and ±0.1% gain error. |
| Auto-sleep low-power mode | Reduces total power to 32 mW at 10 kSPS - cuts idle consumption by >85% versus continuous operation, extending thermal headroom in dense PCB layouts. |
| Dual-interface flexibility (PAR/SER) | Single pin (PAR/SER) selects between 16-bit parallel bus (650 kSPS) or daisy-chainable serial interface (480 kSPS) - simplifies migration between throughput- and pin-count-constrained designs. |
Applications
| Protection Relay Systems | Power Quality Analyzers |
|---|---|
|
Use Scenario: Real-time fault detection in medium-voltage distribution networks using synchronized voltage and current sampling across 3 phases + neutral. IC Role / Device Role / Timing Role: ADS8528SRGCT acquires all 8 analog inputs (e.g., Va, Vb, Vc, Vn, Ia, Ib, Ic, In) simultaneously with <100 ps inter-channel skew, feeding FPGA-based sequence-of-events logic. Use Value: Enables Class P CT/VT compliance per IEC 61850-9-2 LE, meeting <1 μs timestamp alignment requirement for fault location algorithms. |
Use Scenario: Continuous harmonic distortion measurement (up to 50th order) and flicker analysis in grid-connected inverters and industrial drives. IC Role / Device Role / Timing Role: ADS8528SRGCT captures synchronized waveforms at ≥650 kSPS, feeding FFT engines with 73.9 dB SNR to resolve 0.1% THD+N deviations. Use Value: Achieves IEC 61000-4-30 Class A compliance for harmonic group measurement accuracy without oversampling or external decimation filters. |
| Multi-Axis Motor Drives | Programmable Logic Controllers (PLCs) |
|
Use Scenario: Closed-loop field-oriented control (FOC) of servo motors with simultaneous sampling of phase currents, DC bus voltage, and temperature feedback. IC Role / Device Role / Timing Role: ADS8528SRGCT samples all motor feedback signals within one conversion cycle using CONVST_A–D, ensuring zero phase lag between current and voltage vectors. Use Value: Eliminates cross-coupling errors in torque estimation, improving speed regulation accuracy to ±0.05% across 0–3000 RPM range. |
Use Scenario: High-density analog I/O modules in modular PLC backplanes requiring isolated ±10 V sensor inputs and deterministic scan-cycle timing. IC Role / Device Role / Timing Role: ADS8528SRGCT serves as the primary ADC engine in 8-channel AI modules, interfacing via parallel bus to ARM-based controller with <1 μs read latency. Use Value: Delivers 650 kSPS aggregate throughput per module while maintaining –40°C to +70°C operating margin and EN 61000-6-2 EMC immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8548SRGCT | 14-bit resolution, 600 kSPS (PAR), 85 dB SNR, –91 dB THD - higher precision but 8% lower max throughput. | Better suited for harmonic analysis requiring >13 ENOB; less optimal where 12-bit resolution suffices and board space/power budget is constrained. | Select ADS8548SRGCT only when system-level accuracy demands >0.025% full-scale linearity or >70 dB spurious-free dynamic range. |
| AD7606BSTZ | 16-bit, 200 kSPS (PAR), ±10 V input, internal 2.5 V ref - lower throughput, fixed reference, no ±12 V support. | Targeted at lower-speed, high-precision lab instrumentation; lacks HVDD/HVSS rails and programmable reference DAC. | Choose AD7606BSTZ for cost-sensitive, non-industrial applications where ±10 V range and 200 kSPS suffice and thermal range is limited to –40°C to +85°C. |
Compared with ADS8548SRGCT and AD7606BSTZ, the ADS8528SRGCT uniquely balances 650 kSPS throughput, ±12 V input flexibility, and 32 mW ultra-low idle power - making it the optimal choice for thermally constrained, high-channel-count industrial controllers needing deterministic real-time response.
Availability
ADS8528SRGCT is available at Aetrix Electronics and suitable for protection relays, power quality analyzers, and multi-axis motor controls requiring stable component supply across extended temperature and long production lifecycles.
Supply support for ADS8528SRGCT 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 and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADS85x8 family - including ADS8528SRGCT - was engineered specifically for high-reliability, simultaneous-sampling applications in energy infrastructure, factory automation, and motor control, emphasizing thermal robustness, bipolar input flexibility, and interface scalability.
FAQ
What is the maximum analog input voltage range supported by the ADS8528SRGCT?
The ADS8528SRGCT supports a maximum analog input voltage range of ±12 V, achieved using HVDD = +15 V and HVSS = –15 V supplies with internal reference scaling. This is confirmed in the Absolute Maximum Ratings table and validated across –40°C to +125°C in the Recommended Operating Conditions section of the SBAS543C datasheet. The ADS8528SRGCT achieves this range without external level-shifting circuitry.
Does the ADS8528SRGCT require an external reference voltage?
No, the ADS8528SRGCT does not require an external reference voltage. It integrates a programmable 10-bit internal DAC that generates a stable 0.5–2.5 V or 0.5–3.0 V reference, configurable via hardware pins or the CONFIG register. External reference use is optional and enabled only when REFEN/WR is low in hardware mode or CONFIG bit C15 = 0 - the ADS8528SRGCT operates fully functional with internal reference alone.
What package type is used for the ADS8528SRGCT?
The ADS8528SRGCT uses a 64-pin VQFN package (RGC suffix) measuring 9.0 mm × 9.0 mm with 0.5 mm pitch and an exposed thermal pad. This is explicitly stated in the Device Information table and Pin Configuration diagrams of the SBAS543C datasheet. The LQFP variant (PM package) is a separate orderable part (e.g., ADS8528SPM), not applicable to the SRGCT suffix.
Can the ADS8528SRGCT perform true simultaneous sampling across all eight channels?
Yes, the ADS8528SRGCT performs true simultaneous sampling across all eight channels using its four dedicated CONVST_A–D inputs. When all four signals are asserted synchronously, the device initiates conversions on all channel pairs within <100 ps aperture delay matching - a specification verified in the Electrical Characteristics table under "Aperture delay matching" and confirmed in the Functional Block Diagram and Timing Requirements sections of SBAS543C.
What is the power consumption of the ADS8528SRGCT at 650 kSPS?
At its maximum parallel interface data rate of 650 kSPS, the ADS8528SRGCT consumes 125 mW (typical) when powered with AVDD = 5 V, DVDD = 3.3 V, HVDD = 15 V, and HVSS = –15 V - as specified in the Electrical Characteristics table under "Power Dissipation" (Section 7.6). This value includes all analog and digital circuitry and is measured across the full –40°C to +125°C temperature range.
ADS8528SRGCT 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:
- 12
- Sampling Rate (Per Second):
- 650k
- 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:
- -
ADS8528SRGCT FAQ
1.How can I place an order for ADS8528SRGCT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8528SRGCT 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 ADS8528SRGCT reliable?
The price and inventory of ADS8528SRGCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8528SRGCT is usually 5 days.
3.What payment methods are accepted for ADS8528SRGCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8528SRGCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8528SRGCT?
ADS8528SRGCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8528SRGCT 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 ADS8528SRGCT?
For technical support, including ADS8528SRGCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8528SRGCT requirements.
6.How does Aetrix verify that ADS8528SRGCT is sourced from the original manufacturer or authorized distributors?
All ADS8528SRGCT 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 ADS8528SRGCT meets industry standards.
7.What is the process for return or replacement of ADS8528SRGCT?
All ADS8528SRGCT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8528SRGCT, 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 ADS8528SRGCT part is unused and in its original packaging.
Return procedure for ADS8528SRGCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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