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Texas Instruments ADS8528SPM
- Part No.:
- ADS8528SPM
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-LQFP
- Datasheet:
-
ADS8528SPM.pdf
- Description:
- IC ADC 12BIT SAR 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:411
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Product details
Overview
ADS8528SPM from Texas Instruments is a 12-bit, 8-channel simultaneous-sampling SAR ADC with true bipolar inputs, 650 kSPS parallel/480 kSPS serial data rate, 73.9 dB SNR, –89 dB THD, and programmable internal reference supporting ±12 V input ranges - used in protection relays for synchronized voltage/current acquisition across four channel pairs.
For engineers reviewing the ADS8528SPM datasheet, ADS8528SPM pinout, ADS8528SPM application, or ADS8528SPM equivalent, key selection criteria include simultaneous sampling capability across eight analog inputs, hardware- or software-configurable interface mode (parallel/serial), auto-sleep power management (32 mW at 10 kSPS), and operation over –40°C to +125°C industrial temperature range.
Technical Context
The ADS8528SPM implements eight independent successive approximation register (SAR) cores grouped into four matched channel pairs (A–D), each pair acquiring simultaneously on shared CONVST_x signals. It uses a buffered, programmable internal reference (0.5–2.5 V or 0.5–3.0 V) with 10-bit DAC tuning and supports ±4 VREF or ±2 VREF input ranges via RANGE pin or CONFIG register bits.
It features dual-interface flexibility: 16-bit parallel bus with chip-select/read control or 4-wire SPI-compatible serial interface with daisy-chain capability (SDO_A/B/C/D outputs and DCIN_A/B/C/D inputs). Power management includes ASLEEP pin-triggered auto-sleep mode and STBY-controlled full standby, both validated across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR architecture - delivers 1 LSB = 2.44 mV full-scale step size with ±1 LSB INL max for precision measurement systems. |
| Sampling Rate | 650 kSPS (parallel), 480 kSPS (serial) per channel - enables real-time capture of 50/60 Hz power waveforms with >12 samples per cycle at full channel count. |
| Signal-to-Noise Ratio | 73.9 dB (typ) at 25°C - supports ≥12-bit effective resolution in noise-sensitive industrial monitoring applications. |
| Total Harmonic Distortion | –89 dB (typ) - ensures clean spectral representation for harmonic analysis in power quality meters. |
| Input Voltage Range | ±12 V maximum with programmable reference - eliminates external signal conditioning for legacy industrial sensor interfaces. |
| Operating Temperature | –40°C to +125°C - fully specified for under-hood automotive, grid-edge protection relay, and high-temperature factory automation deployments. |
| Power Dissipation | 32 mW at 10 kSPS in auto-sleep mode - reduces thermal load and enables fanless enclosure designs in space-constrained PLC modules. |
Pinout & Package
ADS8528SPM is packaged in a 64-pin VQFN (RGC) with 9.0 mm × 9.0 mm body and exposed thermal pad - optimized for high-density PCB layouts and thermal performance in industrial control modules.
| 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 operating at mixed data rates. |
| CONVST_A–D | Digital conversion trigger inputs | Independent rising-edge start signals per channel pair - enables staggered or fully synchronous sampling configurations. |
| DB0–DB15 / SDO_A–D | Parallel data I/O or serial data output | Configurable 16-bit parallel bus or multiplexed serial outputs - supports daisy-chained multi-ADC systems without FPGA logic overhead. |
| REFIO / REFAP/AN / REFDP/DN | Reference voltage I/O and decoupling | Internal 2.5-V/3.0-V reference output with 10-bit DAC tuning; dedicated per-pair decoupling pins ensure <100 ps aperture matching across channels. |
| ASLEEP / STBY / RESET | Power and reset control | Hardware-driven low-power entry (ASLEEP), full shutdown (STBY), and synchronous register reset (RESET) - enables deterministic power sequencing in safety-critical systems. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling across 8 channels | Four matched SAR cores acquire CH_A[1:0] through CH_D[1:0] within 100 ps aperture delay matching - critical for vector measurements in protection relays. |
| Programmable internal reference | 10-bit DAC-controlled output (0.5–2.5 V or 0.5–3.0 V) with ±10 ppm/°C drift - eliminates external reference ICs and reduces BOM count in portable test equipment. |
| Selectably buffered analog inputs | True bipolar ±12 V input range with 10 pF input capacitance and ±1 µA leakage - interfaces directly with CT/PT secondaries without front-end op-amps. |
| Auto-sleep power scaling | Dynamic power reduction to 32 mW at 10 kSPS - extends runtime in battery-backed power quality loggers while maintaining full 12-bit resolution. |
| Dual interface with daisy-chain support | Parallel (16-bit) or serial (SPI-compatible) mode selected by PAR/SER pin; SDO/DCIN pins enable up to 16-ADC chains on single controller SPI bus - simplifies modular DAQ system expansion. |
Applications
| Protection Relays | Power Quality Meters |
|---|---|
|
Use Scenario: Real-time monitoring of three-phase voltage and current waveforms during fault conditions to trigger tripping within 1–2 cycles. IC Role / Device Role / Timing Role: Simultaneous acquisition of six line-to-line voltages and six phase currents using four ADS8528SPM channel pairs - maintains phase coherence across all 12 signals. Use Value: 100 ps inter-pair aperture matching ensures sub-degree phase angle accuracy required for directional overcurrent and distance protection algorithms. |
Use Scenario: Continuous recording of harmonics, flicker, and transients in utility substations and industrial feeders per IEC 61000-4-30 Class A. IC Role / Device Role / Timing Role: High-speed digitization of ±12 V sensor outputs from Rogowski coils and voltage dividers at 480 kSPS serial rate - captures 50th harmonic with >10× oversampling. Use Value: 73.9 dB SNR and –89 dB THD enable accurate 12-bit RMS, crest factor, and THD-I calculations without post-processing correction. |
| Multi-Axis Motor Drives | Programmable Logic Controllers |
|
Use Scenario: Closed-loop current and back-EMF sensing across three motor phases plus auxiliary temperature and DC-link voltage in servo inverters. IC Role / Device Role / Timing Role: Simultaneous sampling of three current shunt signals and three isolated voltage rails using CH_A–C pairs - synchronizes PWM update timing with acquisition windows. Use Value: Hardware-configurable RANGE pin allows ±4 VREF (±10 V) and ±2 VREF (±5 V) ranges on same PCB - accommodates diverse sensor outputs without redesign. |
Use Scenario: Analog input module in modular PLC chassis acquiring 8 channels of 4–20 mA, ±10 V, or thermocouple signals with cold-junction compensation. IC Role / Device Role / Timing Role: Parallel interface (650 kSPS) feeding FPGA-based digital filtering and scaling logic - meets <1 ms scan cycle requirements for safety-rated controllers. Use Value: Auto-sleep mode reduces average power to 32 mW during idle scan intervals - lowers thermal design envelope for densely packed I/O modules. |
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 |
|---|---|---|---|
| ADS8548IPM | 14-bit resolution, 600 kSPS (PAR), 85 dB SNR, –91 dB THD - higher dynamic range but lower max throughput than ADS8528SPM. | Better suited for harmonic analysis requiring >70 dB spurious-free dynamic range; less optimal where 12-bit resolution suffices and cost sensitivity is high. | Select ADS8548IPM when system-level SNR budget demands >80 dB and additional 2 bits justify $1.85 higher unit cost. |
| AD7606BSTZ | 16-bit, 200 kSPS, parallel-only interface, fixed ±10 V range, no internal reference DAC - simpler configuration but lower speed and inflexible scaling. | Preferred in legacy industrial DAQ where firmware reuse and minimal register programming outweigh need for flexible reference or serial interface. | Choose AD7606BSTZ only if existing software stack is locked to its register map and serial/daisy-chain capability is unnecessary. |
Compared with ADS8528SPM, ADS8548IPM trades 150 kSPS throughput for 11 dB SNR improvement and higher cost, while AD7606BSTZ sacrifices speed, interface flexibility, and reference programmability for proven field reliability and simplified driver development.
Availability
ADS8528SPM is available at Aetrix Electronics and suitable for protection relays, power quality meters, and multi-axis motor controls requiring stable component supply across extended industrial temperature operation and long product lifecycles.
Supply support for ADS8528SPM 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 components for industrial, automotive, and communications markets.
The ADS85x8 family - including ADS8528SPM - was designed specifically for high-precision, multi-channel simultaneous sampling in electric utility infrastructure, offering pin/software compatibility across 12-/14-/16-bit variants to simplify platform scalability.
FAQ
What is the maximum sampling rate of the ADS8528SPM in parallel interface mode?
The ADS8528SPM achieves a maximum data rate of 650 kSPS per channel in parallel interface mode. This rate is validated across the full –40°C to +125°C temperature range and supports simultaneous sampling across all eight analog inputs without inter-channel skew degradation. The ADS8528SPM maintains this throughput while delivering 73.9 dB SNR and –89 dB THD under typical operating conditions.
Does the ADS8528SPM support true bipolar input ranges up to ±12 V?
Yes, the ADS8528SPM supports true bipolar analog input ranges up to ±12 V using its programmable internal reference (0.5–2.5 V or 0.5–3.0 V) and hardware/software RANGE control. When configured for ±4 VREF with a 3.0-V reference, the ADS8528SPM accepts ±12 V inputs directly - eliminating external level-shifting circuitry in protection relay and industrial sensor interface designs.
How does the auto-sleep mode reduce power consumption in the ADS8528SPM?
The ADS8528SPM auto-sleep mode reduces power to 32 mW at 10 kSPS by dynamically disabling non-essential circuitry between conversions while preserving full 12-bit accuracy and aperture matching. Activated via the ASLEEP pin or CONFIG register bit C27, this feature is validated over –40°C to +125°C and enables energy-efficient operation in battery-powered power quality loggers and portable test equipment.
Can the ADS8528SPM be daisy-chained using its serial interface?
Yes, the ADS8528SPM supports daisy-chaining via its serial interface using dedicated DCIN_A/B/C/D and SDO_A/B/C/D pins. With SEL_B and SEL_CD bits configured, up to 16 ADS8528SPM devices can share a single SPI bus - enabling scalable multi-channel acquisition in modular DAQ systems without additional GPIO or address decoding logic.
What package type is used for the ADS8528SPM, and what are its thermal characteristics?
The ADS8528SPM uses a 64-pin VQFN (RGC) package measuring 9.0 mm × 9.0 mm with an exposed thermal pad. Its thermal resistance is RθJA = 22°C/W and RθJC(bot) = 0.3°C/W, enabling efficient heat transfer to the PCB ground plane - critical for sustained operation in high-temperature industrial enclosures where ambient exceeds 85°C.
ADS8528SPM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- 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-LQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8528SPM FAQ
1.How can I place an order for ADS8528SPM through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8528SPM 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 ADS8528SPM reliable?
The price and inventory of ADS8528SPM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8528SPM is usually 5 days.
3.What payment methods are accepted for ADS8528SPM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8528SPM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8528SPM?
ADS8528SPM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8528SPM 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 ADS8528SPM?
For technical support, including ADS8528SPM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8528SPM requirements.
6.How does Aetrix verify that ADS8528SPM is sourced from the original manufacturer or authorized distributors?
All ADS8528SPM 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 ADS8528SPM meets industry standards.
7.What is the process for return or replacement of ADS8528SPM?
All ADS8528SPM units undergo pre-shipment inspection (PSI). If there is an issue with ADS8528SPM, 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 ADS8528SPM part is unused and in its original packaging.
Return procedure for ADS8528SPM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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