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Texas Instruments ADS8548SRGCT
- Part No.:
- ADS8548SRGCT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ADS8548SRGCT.pdf
- Description:
- IC ADC 14BIT SAR 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,312
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Product details
Overview
ADS8548SRGCT from Texas Instruments is a 14-bit, 8-channel simultaneous-sampling SAR ADC with true bipolar inputs, 600 kSPS parallel or 450 kSPS serial data rate, 85 dB SNR, –91 dB THD, and programmable internal reference supporting ±12 V input ranges. It serves as the high-precision analog front-end in protection relays requiring synchronized voltage/current acquisition across multiple phases.
For engineers reviewing the ADS8548SRGCT datasheet, ADS8548SRGCT pinout, ADS8548SRGCT application, or ADS8548SRGCT equivalent, key selection criteria include simultaneous sampling accuracy across four channel pairs, auto-sleep power scaling down to 32 mW at 10 kSPS, hardware/software mode flexibility via HW/SW and PAR/SER pins, and operation over –40°C to +125°C industrial temperature range.
Technical Context
The ADS8548SRGCT implements eight independent SAR converters grouped into four matched channel pairs (A–D), each with dedicated reference decoupling (REFAP/REFAN, REFDP/REFDN, etc.) and individual conversion start inputs (CONVST_A–D). Its dual-mode interface supports either 16-bit parallel bus (DB0–DB15) or daisy-chainable SPI-compatible serial interface using SCLK, SDI, and configurable SDO outputs.
Internal architecture includes a 10-bit programmable string DAC for reference tuning (0.5 V–2.5 V or 0.5 V–3.0 V), configurable aperture delay matching (<100 ps), and auto-sleep mode triggered by ASLEEP pin or CONFIG register bit C27, reducing power during low-throughput intervals without sacrificing channel synchronization fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit SAR - delivers 1 part in 16,384 quantization granularity for precision measurement of ±12 V signals |
| Max Data Rate (Parallel) | 600 kSPS per channel - enables real-time capture of 50/60 Hz power waveforms with >12 samples per cycle |
| Signal-to-Noise Ratio | 85 dB typical - ensures ≥13.8 effective number of bits (ENOB) for clean spectral analysis in PQ meters |
| Total Harmonic Distortion | –91 dB typical - minimizes harmonic contamination critical for relay trip decision accuracy |
| Input Voltage Range | ±12 V full-scale - accommodates direct connection to CT/PT secondary outputs without external signal conditioning |
| Operating Temperature | –40°C to +125°C - validated for deployment in outdoor substations and motor drive cabinets |
| Reference Flexibility | Programmable 0.5–2.5 V or 0.5–3.0 V internal reference - eliminates need for external precision reference ICs |
Pinout & Package
ADS8548SRGCT is housed in a 64-pin VQFN package (9.0 mm × 9.0 mm) with exposed thermal pad, optimized for high-density industrial PCB layouts and thermal dissipation in enclosed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH_A0 / CH_A1 | Analog input pair A | Master channel pair; must operate at highest data rate when channel pairs run asynchronously |
| CONVST_A–D | Dedicated conversion start inputs | Enable independent or synchronized sampling across four isolated channel groups |
| REFAP / REFAN / REFDP / REFDN | Per-pair reference decoupling terminals | Allow local RC filtering for each channel pair to maintain SNR under noisy supply conditions |
| PAR/SER | Interface mode select | Hardware-configurable switch between 16-bit parallel bus and 4-wire serial interface with daisy-chain support |
| ASLEEP | Auto-sleep enable | Reduces power to 32 mW at 10 kSPS by gating internal clock after conversion completion |
| REFIO | Reference I/O | Configurable as internal reference output or external reference input; supports 10-bit DAC tuning via CONFIG register |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling across 8 channels | Four matched SAR cores with <100 ps aperture delay matching ensure phase-coherent acquisition for vector calculations |
| Selectable parallel or serial interface | Single device supports both high-throughput parallel readout and space-efficient serial daisy-chaining up to 16 devices |
| Programmable internal reference | 10-bit DAC (0.5–2.5 V or 0.5–3.0 V range) eliminates external reference components while maintaining ±10 ppm/°C drift stability |
| Auto-sleep power management | Dynamic power scaling reduces average consumption from 125 mW (600 kSPS) to 32 mW (10 kSPS) without firmware intervention |
| True bipolar input architecture | Direct ±12 V input capability with HVDD/HVSS supplies avoids level-shifting circuitry and associated noise/offset errors |
Applications
| Protection Relays | Power Quality Meters |
|---|---|
Use Scenario: Real-time monitoring of three-phase voltage and current waveforms in medium-voltage feeder protection systems. IC Role / Device Role / Timing Role: Simultaneous sampling front-end capturing synchronized analog inputs across all six current/voltage channels per cycle. Use Value: Aperture delay matching <100 ps ensures sub-degree phase error for accurate fault direction detection and harmonic-based tripping algorithms. | Use Scenario: Continuous waveform capture and FFT analysis in Class-A power quality analyzers compliant with IEC 61000-4-30 Ed. 3. IC Role / Device Role / Timing Role: High-SNR data acquisition engine delivering 14-bit resolution at 450 kSPS serial throughput for 10-cycle RMS and THD computation. Use Value: 85 dB SNR and –91 dB THD enable reliable detection of 0.1% harmonic distortion levels in grid-tied inverters and VFDs. |
| Multi-Axis Motor Drives | Industrial PLC Analog Input Modules |
Use Scenario: Closed-loop current control in servo drives with field-oriented control (FOC) requiring precise rotor position and torque feedback. IC Role / Device Role / Timing Role: Simultaneous sampling of phase currents and DC bus voltage to compute instantaneous power and torque vectors. Use Value: Independent CONVST inputs allow staggered sampling of current sensors and bus voltage while maintaining time-aligned reconstruction for FOC math. | Use Scenario: Modular analog input card in programmable logic controllers handling mixed-signal sensor inputs (RTD, thermocouple, 4–20 mA) in harsh factory environments. IC Role / Device Role / Timing Role: Precision ADC core supporting software-configurable gain and reference settings per channel group via CONFIG register. Use Value: Hardware/software mode flexibility (HW/SW pin) enables factory calibration via serial interface and runtime reconfiguration without hardware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8568SRGCT | 16-bit resolution, 510 kSPS max parallel rate, 91.5 dB SNR, larger 64-pin VQFN footprint | Better ENOB for ultra-high-accuracy metering; lower throughput limits use in high-speed transient capture | Choose ADS8568SRGCT when system requires >14.5 ENOB and can accept 15% lower sampling rate |
| AD7606BSTZ | 16-bit, 200 kSPS, parallel-only interface, integrated analog front-end (anti-alias filter, PGA), no daisy-chain serial mode | Simpler layout due to on-chip signal conditioning; lacks flexible reference programming and auto-sleep mode | Choose AD7606BSTZ when board space is constrained and external anti-alias filtering is undesirable |
Compared with ADS8548SRGCT, ADS8568SRGCT trades 15% lower throughput for 6.5 dB higher SNR and two additional effective bits, while AD7606BSTZ sacrifices interface flexibility and power scalability to integrate signal conditioning-making ADS8548SRGCT optimal for systems needing balanced resolution, speed, and configurability.
Availability
ADS8548SRGCT is available at Aetrix Electronics and suitable for protection relays, power quality meters, multi-axis motor controls, and industrial PLC analog input modules requiring stable component supply across extended temperature and long production lifecycles.
Supply support for ADS8548SRGCT 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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and industrial-grade signal chain solutions.
The ADS85x8 product line was designed specifically for high-reliability industrial energy monitoring and control applications demanding simultaneous sampling, wide input voltage range, and extended temperature operation.
FAQ
What is the maximum sampling rate of the ADS8548SRGCT in parallel interface mode?
The ADS8548SRGCT achieves a maximum data rate of 600 kSPS per channel in parallel interface mode. This rate is specified under recommended operating conditions (AVDD = 5 V, DVDD = 3.3 V, TA = –40°C to +125°C) and supports real-time acquisition of power system waveforms with sufficient oversampling for harmonic analysis. The ADS8548SRGCT maintains full 14-bit performance at this rate, with typical SNR of 85 dB and THD of –91 dB.
Does the ADS8548SRGCT support true bipolar input ranges up to ±12 V?
Yes, the ADS8548SRGCT supports true bipolar input ranges up to ±12 V through its dedicated HVDD and HVSS supply pins (rated –16.5 V to +16.5 V). When configured with the internal 2.5-V reference and RANGE pin set low, the device delivers a ±4 VREF full-scale range, enabling direct connection to standard current transformer (CT) and potential transformer (PT) secondaries without external level-shifting circuitry. The ADS8548SRGCT maintains specified AC performance across this range.
How does the auto-sleep mode function in the ADS8548SRGCT?
The ADS8548SRGCT auto-sleep mode reduces power consumption to 32 mW at 10 kSPS by automatically disabling the internal conversion clock six tCCLK cycles after a CONVST_x pulse completes. Activated via the ASLEEP pin (high) or CONFIG register bit C27, this mode preserves full channel synchronization and eliminates wake-up latency. The ADS8548SRGCT resumes normal operation immediately upon the next CONVST assertion, making it ideal for burst-mode acquisition in energy-harvesting or battery-backed systems.
Can the ADS8548SRGCT be used in daisy-chain configuration with other ADCs?
Yes, the ADS8548SRGCT supports daisy-chain operation in serial interface mode using DB0–DB3 as daisy-chain inputs (DCIN_D–DCIN_A) and DB12–DB15 as configurable SDO outputs (SDO_A–SDO_D). With SEL_B and SEL_CD pins, up to 16 devices can be cascaded on a single SPI bus, sharing SCLK and SDI while routing SDO outputs sequentially. This capability is confirmed in the ADS8548SRGCT datasheet section "Pin Functions" and enables scalable multi-channel systems without additional GPIO overhead.
What package type is used for the ADS8548SRGCT and what are its thermal characteristics?
The ADS8548SRGCT uses a 64-pin VQFN package (RGC suffix) measuring 9.0 mm × 9.0 mm with an exposed thermal pad. Its thermal resistance is RθJA = 22°C/W (junction-to-ambient) and RθJC(bot) = 0.3°C/W (junction-to-case bottom), enabling efficient heat transfer to the PCB. These values are measured per JEDEC JESD51 standards and allow the ADS8548SRGCT to sustain full performance at +125°C ambient when implemented with minimum 2 oz copper and 4 thermal vias under the pad.
ADS8548SRGCT 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:
- 14
- Sampling Rate (Per Second):
- 600k
- 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:
- -
ADS8548SRGCT FAQ
1.How can I place an order for ADS8548SRGCT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8548SRGCT 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 ADS8548SRGCT reliable?
The price and inventory of ADS8548SRGCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8548SRGCT is usually 5 days.
3.What payment methods are accepted for ADS8548SRGCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8548SRGCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8548SRGCT?
ADS8548SRGCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8548SRGCT 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 ADS8548SRGCT?
For technical support, including ADS8548SRGCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8548SRGCT requirements.
6.How does Aetrix verify that ADS8548SRGCT is sourced from the original manufacturer or authorized distributors?
All ADS8548SRGCT 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 ADS8548SRGCT meets industry standards.
7.What is the process for return or replacement of ADS8548SRGCT?
All ADS8548SRGCT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8548SRGCT, 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 ADS8548SRGCT part is unused and in its original packaging.
Return procedure for ADS8548SRGCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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