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Texas Instruments ADS1259IPWR
- Part No.:
- ADS1259IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS1259IPWR.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,174
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Product details
Overview
ADS1259IPWR from Texas Instruments is a 24-bit delta-sigma analog-to-digital converter with integrated 2.5V low-drift reference, programmable digital filter (sinc1/sinc2), and SPI-compatible interface. It delivers 0.4ppm INL, 0.05μV/°C offset drift, and 0.7μVRMS noise at 60SPS for high-accuracy industrial process control and scientific instrumentation.
For engineers reviewing the ADS1259IPWR datasheet, ADS1259IPWR pinout, ADS1259IPWR application, or ADS1259IPWR equivalent, this page provides verified technical context, TSSOP-20 package details, real-world application cards, and two validated alternative parts - all grounded in TI's SBAS424D datasheet and official specifications.
Technical Context
The ADS1259IPWR employs a fourth-order, inherently stable ΔΣ modulator with 2+2 pipelined architecture, enabling single-cycle settling in sinc1 mode and simultaneous 50/60Hz rejection at 10SPS. Its digital filter supports programmable averaging to achieve output data rates from 10SPS to 14.4kSPS.
It integrates an on-chip LDO powering the digital core from DVDD, a fast out-of-range detector flagging ±105% FSR excursions, and a calibration engine correcting system offset/gain errors. Clocking options include internal oscillator (±0.2% accuracy), external crystal (0.1–8MHz), or external CLKIN with 40–60% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24 bits, no missing codes - guarantees monotonicity and full dynamic range utilization in precision measurement systems. |
| Data Rate Range | 10 to 14,400 SPS - enables flexible trade-off between noise performance (0.45μVRMS at 10SPS) and throughput. |
| INL | ±0.4 ppm - ensures sub-ppm linearity critical for metrology-grade calibration and sensor signal chains. |
| Reference Drift | 2 ppm/°C - maintains absolute accuracy over –40°C to +105°C without external trimming. |
| Power Dissipation | 13 mW operating, <25 μW power-down - supports low-power industrial nodes and battery-backed monitoring. |
| Supply Range | Analog: ±2.5V or +5V; Digital: +2.7V to +5V - accommodates both bipolar sensor interfaces and single-supply embedded systems. |
| Noise (60SPS) | 0.7 μVRMS - achieves 22.8 ENOB, sufficient for 20+ bit effective resolution in low-frequency applications. |
Pinout & Package
TSSOP-20 package with 0.65mm pitch, fully specified from –40°C to +105°C. Exposed pad not present; RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP / AINN | Differential analog input | Accepts ±VREF full-scale differential signals; 120kΩ differential impedance minimizes loading on front-end amplifiers. |
| VREFP / VREFN | Reference voltage inputs | Supports external reference or internal 2.5V REFOUT; buffered inputs reduce sensitivity to source impedance. |
| REFOUT | Internal reference output | Provides 2.5V ±0.4% at up to ±10mA; turn-on settling time of 1s to ±0.001% enables stable reference for multi-channel systems. |
| AVDD / AVSS | Analog supply rails | Support ±2.5V or +5V configuration; AVSS serves as negative reference output and analog ground reference. |
| DVDD / DGND | Digital supply and ground | Independent 2.7–5.25V domain isolates digital noise; LDO-derived core voltage reduces switching interference. |
| SCLK / CS / DIN / DOUT / DRDY | SPI interface | 4MHz max clock; DRDY active-low indicates ready data; CS low enables serial communication with 50ns setup timing. |
| RESET/PWDN | Reset & power-down control | Pulse low for reset; hold low for <25μW sleep mode - eliminates need for external power-gating circuitry. |
| XTAL1/CLKIN / XTAL2 | External clock interface | XTAL1 accepts crystal (0.1–8MHz) or external clock; XTAL2 is crystal output or NC when using CLKIN. |
| BYPASS | LDO output bypass | Requires ≥0.1μF capacitor to DGND; stabilizes internal 1.8V digital core supply against transient load variations. |
| SYNCOUT | Divided clock output | Outputs fCLK/8 - synchronizes external devices like PGA280 chopping clocks without additional timing components. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable sinc1/sinc2 digital filter | Enables single-cycle settling (sinc1) or enhanced 50/60Hz rejection (sinc2) - selectable per application without hardware change. |
| Integrated 2.5V reference with 2ppm/°C drift | Eliminates external reference IC and associated layout complexity while maintaining <10ppm total error over temperature. |
| Out-of-range detection with latched FLAG bit | Flags ±105% FSR excursions in real time and appends result to checksum byte - enables immediate fault response without host polling. |
| On-command offset/gain calibration | Corrects system-level errors using internal shorted-input and reference measurements - removes need for factory-trimmed calibration coefficients. |
| SPI interface with checksum & redundant read | Detects transmission errors via 8-bit checksum and validates data integrity through dual-read capability - critical for safety-critical industrial I/O. |
Applications
| High-Accuracy Weigh Scales | Portable Gas Analyzers |
|---|---|
Use Scenario: Load cell outputs (0.5–10mV full scale) amplified by PGA280 and digitized under battery-constrained conditions. IC Role / Device Role / Timing Role: Primary ADC with integrated reference and low-drift performance; synchronized via SYNCOUT to PGA280 chopping clock. Use Value: 0.05μV/°C offset drift and 0.7μVRMS noise at 60SPS enable <0.005% weighing accuracy across –20°C to +60°C ambient. | Use Scenario: Electrochemical sensor outputs digitized in handheld analyzers requiring 24-bit resolution and <15mW total system power. IC Role / Device Role / Timing Role: Precision ADC with internal oscillator and power-down mode; DRDY triggers microcontroller wake-up only on valid conversion. Use Value: 13mW operating power and <25μW power-down current extend battery life to >12 months in intermittent-read configurations. |
| Industrial PLC Analog Input Modules | Calibration Standards Equipment |
Use Scenario: Multi-channel 4–20mA loop receivers with cold-junction compensation and HART modulation support. IC Role / Device Role / Timing Role: Channel ADC with simultaneous 50/60Hz rejection at 10SPS; SPI interface shares bus with isolation barrier and microcontroller. Use Value: Programmable sinc2 filter rejects line noise without external notch filters, reducing BOM cost and PCB area by 30% vs discrete solutions. | Use Scenario: Metrology-grade calibration sources verifying DMMs and data loggers with traceable uncertainty budgets. IC Role / Device Role / Timing Role: Reference-grade ADC with 0.4ppm INL and on-command calibration; used with precision voltage dividers and thermal-stable references. Use Value: 2ppm/°C reference drift and <10ppm total error over temperature meet ANSI C12.20 Class 0.1 requirements for revenue-grade metering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1256IPWR | 24-bit, 30kSPS, no integrated reference; requires external 2.5V ref (e.g., REF5025); higher power (25mW) | Used where higher speed or external reference control is prioritized over self-contained operation | Select when system already includes ultra-low-drift external reference and needs faster 30kSPS sampling. |
| AD7195BRUZ | 24-bit, 4.8kSPS, integrated PGA (1–128), 5ppm/°C ref drift, SPI interface, 28-lead TSSOP | Preferred for low-level sensor signals needing on-chip gain; less suitable for direct ratiometric bridge measurements | Choose when front-end amplification is required and ±5ppm/°C reference drift is acceptable for the target accuracy class. |
Compared with ADS1256IPWR and AD7195BRUZ, the ADS1259IPWR uniquely combines integrated 2.5V reference (2ppm/°C), single-cycle settling, and 14.4kSPS maximum rate - making it optimal for compact, self-contained industrial sensors where board space, power, and reference stability are co-constrained.
Availability
ADS1259IPWR is available at Aetrix Electronics and suitable for industrial process control, scientific instrumentation, and test and measurement applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ADS1259IPWR 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 ICs.
The ADS1259IPWR belongs to TI's high-accuracy delta-sigma ADC product line, designed specifically for applications demanding low drift, high linearity, and integrated reference stability in harsh industrial environments.
FAQ
What is the maximum sample rate supported by the ADS1259IPWR?
The ADS1259IPWR supports a maximum data rate of 14,400 samples per second (14.4kSPS) in sinc1 mode. At this rate, typical RMS noise is 6.2μV, delivering 19.6 ENOB. The device maintains programmable filtering - sinc2 mode offers improved noise rejection but same maximum rate per datasheet SBAS424D Section 7.6.
Does the ADS1259IPWR require an external crystal to operate?
No, the ADS1259IPWR does not require an external crystal. It includes an internal oscillator with ±0.2% accuracy at +25°C, sufficient for most industrial applications. External crystal (0.1–8MHz) or clock input are optional alternatives for tighter timing control or synchronization with system clocks.
How does the out-of-range detection work on the ADS1259IPWR?
The ADS1259IPWR out-of-range detection flags differential inputs exceeding ±105% of full-scale range (±1.05 × VREF). The comparator latches its result and appends it as the LSB of conversion data or bit 7 of the checksum byte. The latch resets automatically after data read or new conversion start, enabling real-time fault monitoring without host intervention.
What is the purpose of the SYNCOUT pin on the ADS1259IPWR?
The SYNCOUT pin on the ADS1259IPWR outputs a divided clock signal at fCLK/8, intended to synchronize external devices such as the PGA280's chopping clock. This eliminates the need for separate clock generators or dividers in precision analog front-ends, reducing component count and timing skew in multi-chip signal chains.
Can the ADS1259IPWR operate with a single +5V analog supply?
Yes, the ADS1259IPWR supports unipolar analog operation with AVDD = +5V and AVSS = 0V (GND), accepting signals from 0V to +5V referenced to AVSS. It also supports true bipolar operation with AVDD = +2.5V and AVSS = –2.5V, enabling ±2.5V differential input ranges - both configurations are fully specified in the datasheet.
ADS1259IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 14k
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1259IPWR FAQ
1.How can I place an order for ADS1259IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1259IPWR 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 ADS1259IPWR reliable?
The price and inventory of ADS1259IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1259IPWR is usually 5 days.
3.What payment methods are accepted for ADS1259IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1259IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1259IPWR?
ADS1259IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1259IPWR 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 ADS1259IPWR?
For technical support, including ADS1259IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1259IPWR requirements.
6.How does Aetrix verify that ADS1259IPWR is sourced from the original manufacturer or authorized distributors?
All ADS1259IPWR 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 ADS1259IPWR meets industry standards.
7.What is the process for return or replacement of ADS1259IPWR?
All ADS1259IPWR units undergo pre-shipment inspection (PSI). If there is an issue with ADS1259IPWR, 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 ADS1259IPWR part is unused and in its original packaging.
Return procedure for ADS1259IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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