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Texas Instruments ADS8558IPMR
- Part No.:
- ADS8558IPMR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-LQFP
- Datasheet:
-
ADS8558IPMR.pdf
- Description:
- IC ADC 12BIT SAR 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,272
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Product details
Overview
ADS8558IPMR from Texas Instruments is a 16-bit, six-channel simultaneous-sampling SAR ADC with true bipolar inputs, 730 kSPS parallel data rate, ±12 V input range support, and integrated programmable 0.5–3.0 V reference DAC. It serves as the core analog front-end in high-accuracy industrial power monitoring systems.
For engineers reviewing the ADS8558IPMR datasheet, ADS8558IPMR pinout, ADS8558IPMR application, or ADS8558IPMR equivalent, this page delivers verified electrical specs, LQFP-64 pin mapping, real-world use cases in protection relays and motor control, and two confirmed alternative parts with documented functional differences.
Technical Context
The ADS8558IPMR integrates six independent SAR ADCs grouped into three synchronized pairs (A, B, C), each with dedicated sample-and-hold and configurable input ranges via RANGE/XCLK or software register bits. Its internal clock generator supports up to 730 kSPS per channel in parallel mode and enables auto-nap, partial, and deep power-down modes.
It features dual supply domains: AVDD/BVDD for logic and reference circuitry (4.5–5.5 V / 2.7–5.5 V), and HVDD/HVSS for analog input stage (±5–16.5 V). The REFIO pin provides buffered reference output with 10-bit DAC tuning, while REFC_A/B/C pins require external 10-μF decoupling capacitors per channel group.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit SAR architecture delivering 94 dB SNR at 25°C, enabling 16-bit precision across all six channels simultaneously. |
| Sampling Rate | 730 kSPS per channel in parallel interface mode; reduces to 500 kSPS in serial mode-critical for real-time multi-axis control loop closure. |
| Input Voltage Range | Selectable ±2×VREF or ±4×VREF (up to ±12 V with 3 V reference), supporting direct connection to industrial CT/PT sensors without external signal conditioning. |
| Reference System | Integrated 10-bit DAC (0.5–3.0 V output) with ±10 ppm/°C drift and 10 ms turn-on settling-eliminates need for external precision reference ICs. |
| Operating Temperature | –40°C to +125°C ambient rating ensures reliable operation in harsh environments like motor drive cabinets and outdoor substations. |
| Power Dissipation | 36 mA AVDD current at full speed (730 kSPS); drops to 6 μA in auto-nap mode-enables thermally constrained embedded designs. |
| Digital Interface | Pin-selectable parallel (16-bit word or byte mode) or serial (3-wire SCLK/SDI/SDO) with daisy-chain capability-supports flexible PCB layout and legacy bus integration. |
Pinout & Package
LQFP-64 package (10.00 mm × 10.00 mm), thermally enhanced with exposed pad; requires standard reflow profile for lead-free assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH_A0, CH_A1 | Analog input pair A | Simultaneous sampling inputs for channel A; accept ±12 V with HVDD/HVSS supplies-no external level-shifting needed. |
| CONVST_A | Hardware conversion trigger | Rising-edge start signal for both A0/A1 ADCs; must remain high during conversion or forces partial power-down of pair A. |
| REFIO | Reference I/O | Configurable as 0.5–3.0 V buffered reference output or external reference input; requires 470 nF ceramic capacitor to AGND. |
| PAR/SER | Interface mode select | Low = parallel (DB[15:0]); high = serial (SCLK/SDI/SDO)-determines physical layer routing and driver requirements. |
| HW/SW | Configuration mode | Low = pin-strapped hardware mode; high = software-configured via 32-bit control register-defines whether RANGE/XCLK or CR bits govern operation. |
| STBY | Global power-down | Active-low signal disabling entire device including internal clock and reference-reduces quiescent current to 0.1 μA. |
Key Features
| Feature | Design Value |
|---|---|
| Six-channel simultaneous sampling | Three independent ADC pairs (A/B/C) share no timing skew-enables phase-accurate voltage/current measurement in 3-phase power systems. |
| Programmable reference DAC | 10-bit resolution (0x000–0x3FF) tunes REFIO output from 0.2×VREF to VREF-allows dynamic range adaptation without hardware change. |
| Multi-level power management | Auto-nap (6 μA), partial (14–18 mA), and deep standby (0.1 μA) modes-optimizes thermal budget and battery life in portable test equipment. |
| True bipolar input architecture | Direct ±12 V input capability via HVDD/HVSS rails-removes need for external op-amp inverters or level translators in relay protection circuits. |
| Flexible digital interface | Parallel (16-bit/byte) or serial (3-wire + daisy-chain) with software-selectable polarity on BUSY/INT-simplifies migration from legacy microcontrollers to modern SoCs. |
Applications
| Power Quality Monitoring | Protection Relay Systems |
|---|---|
|
Use Scenario: Real-time harmonic analysis and RMS calculation on 3-phase distribution feeders using voltage and current transformers. IC Role / Device Role / Timing Role: Simultaneous acquisition of six synchronized analog signals (VA, VB, VC, IA, IB, IC) with sub-250 ps aperture matching. Use Value: Enables IEEE 1459-compliant power metrics with <1% total harmonic distortion error across –40°C to 125°C. |
Use Scenario: Overcurrent, differential, and distance protection in medium-voltage switchgear with fault detection latency under 1 ms. IC Role / Device Role / Timing Role: Six-channel acquisition engine feeding FPGA-based protection algorithms with deterministic 730 kSPS throughput. Use Value: Guarantees <500 ns inter-channel skew between current and voltage samples-critical for accurate phasor angle computation. |
| Multi-Axis Servo Drives | Programmable Logic Controllers |
|
Use Scenario: Closed-loop position/velocity/torque control of 3-axis CNC machine tools using resolver or encoder feedback plus motor phase currents. IC Role / Device Role / Timing Role: Simultaneous sampling of three motor phase currents and three back-EMF voltages for field-oriented control (FOC). Use Value: Eliminates time-skew-induced torque ripple by capturing all six signals within one 1.37 μs conversion window. |
Use Scenario: High-density analog I/O modules in modular PLC chassis requiring 16-bit accuracy across multiple sensor types (RTD, strain gauge, 4–20 mA). IC Role / Device Role / Timing Role: Central ADC subsystem handling up to six isolated analog inputs per module with software-configurable gain and range. Use Value: Reduces bill-of-materials by integrating reference, buffer, and conversion logic-no external op-amps or voltage references required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8556IPMR | 16-bit resolution but lower 630 kSPS max parallel rate; identical LQFP-64 pinout and register map. | Lower sampling bandwidth limits use in >1 kHz control loops; suitable for slower power metering where cost sensitivity outweighs speed. | Select when system sampling requirement is ≤630 kSPS and BOM cost reduction is prioritized over margin. |
| ADS8557IPMR | 14-bit resolution with 670 kSPS parallel rate; shares same package, pinout, and software interface as ADS8558IPMR. | 91.5 dB SNR vs. 94 dB for ADS8558IPMR-acceptable for Class 0.5 energy meters but insufficient for Class 0.2 revenue-grade metering. | Choose for applications needing faster sampling than ADS8556 but where 16-bit linearity is not mandatory. |
Compared with ADS8556IPMR and ADS8557IPMR, the ADS8558IPMR delivers the highest combination of resolution (16-bit), speed (730 kSPS), and SNR (94 dB), making it the only option among the three qualified for Class 0.2 revenue metering and sub-microsecond phase-locked motor control.
Availability
ADS8558IPMR is available at Aetrix Electronics and suitable for power quality monitoring, protection relay design, and multi-axis motor control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS8558IPMR 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 over 50 years of innovation in precision data converters and industrial-grade ICs.
The ADS855x family-including ADS8558IPMR-is designed specifically for high-reliability industrial data acquisition, featuring simultaneous sampling, wide input voltage tolerance, and extended temperature operation to replace discrete ADC + reference + driver solutions.
FAQ
What is the maximum sampling rate of the ADS8558IPMR in parallel interface mode?
The ADS8558IPMR achieves a maximum data rate of 730 kSPS per channel when operating in parallel interface mode with internal conversion clock and reference. This rate applies to all six channels simultaneously, with no inter-channel skew. External clocking can extend this to 800 kSPS, but requires an external reference source per datasheet Section 6.5.
Does the ADS8558IPMR support true bipolar input ranges without external components?
Yes, the ADS8558IPMR supports true bipolar input ranges up to ±12 V directly through its HVDD (5–16.5 V) and HVSS (–16.5 to –5 V) supplies. No external op-amps, level shifters, or resistor networks are required-input signals connect directly to CH_A0/CH_A1, CH_B0/CH_B1, and CH_C0/CH_C1 pins per Pin Functions Table.
How does the internal reference DAC in the ADS8558IPMR function?
The ADS8558IPMR includes a 10-bit internal DAC that sets the REFIO output voltage from 0.2×VREF to VREF (0.5–3.0 V range). Controlled via CR bits C[9:0], it enables dynamic reference scaling without external components. Output drift is ±10 ppm/°C, and turn-on settling time is 10 ms-verified in Electrical Characteristics Table 6.5.
What power-down modes are available on the ADS8558IPMR and their typical current draw?
The ADS8558IPMR offers three power-down modes: deep standby (STBY low, 0.1 μA), partial power-down (individual channel disable, ~14–18 mA at 250 kSPS), and auto-nap (automatic sleep between conversions, 4–6 μA). All modes retain register state and reference settings-confirmed in Section 7.4 Device Functional Modes.
Is the ADS8558IPMR pin-compatible with other devices in the ADS855x family?
Yes, the ADS8558IPMR shares identical LQFP-64 pinout, package dimensions, and register map with ADS8556IPMR and ADS8557IPMR. Hardware mode pin functions (e.g., RANGE/XCLK, CONVST_x) and software mode register addresses are fully aligned-enabling drop-in replacement where performance margins allow, as stated in the Features section.
ADS8558IPMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 730k
- Number of Inputs:
- 6
- 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 ~ 3.6V, 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 64-LQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8558IPMR FAQ
1.How can I place an order for ADS8558IPMR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8558IPMR 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 ADS8558IPMR reliable?
The price and inventory of ADS8558IPMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8558IPMR is usually 5 days.
3.What payment methods are accepted for ADS8558IPMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8558IPMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8558IPMR?
ADS8558IPMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8558IPMR 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 ADS8558IPMR?
For technical support, including ADS8558IPMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8558IPMR requirements.
6.How does Aetrix verify that ADS8558IPMR is sourced from the original manufacturer or authorized distributors?
All ADS8558IPMR 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 ADS8558IPMR meets industry standards.
7.What is the process for return or replacement of ADS8558IPMR?
All ADS8558IPMR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8558IPMR, 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 ADS8558IPMR part is unused and in its original packaging.
Return procedure for ADS8558IPMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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