ADS1263 - 32-Bit 38-kSPS Delta-Sigma ADC | Texas Instruments
MPN: ADS1263 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.52 | $5,520.00 |
Drop-in alternatives for ADS1263 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADS1262
β Drop-Inβ In Stock
$5.4 / Unit
View Datasheet βADS127L11
β‘ Same Packageβ In Stock
$8.1 / Unit
View Datasheet βADS1263 Maximum Ratings & Electrical Characteristics
| Resolution | 32 bit |
| Sampling Rate | 38.4 kSPS |
| Number of Input Channels | 10 single-ended / 5 differential |
| Input Type | Differential |
| Architecture | Delta-Sigma |
| PGA Gain | Up to 32 |
| Auxiliary ADC | 24-bit delta-sigma (background measurements) |
| Internal Reference | 2.5 V |
| Interface | SPI (4-wire or 3-wire) |
| Line Cycle Rejection | 130 dB (50 Hz / 60 Hz, single-cycle settling filter) |
| Operating Temperature | -40C to +125C |
| Package | 28-TSSOP |
| Mounting Type | Surface Mount |
| GPIO | 8x multiplexed GPIO |
| IDACs | Integrated current DACs for sensor excitation |
| Fault Monitors | Internal (sensor burnout, supply, reference) |
| RoHS Status | Compliant |
ADS1263 Pin Configuration
| Pin 1 | AVDD β Analog power supply |
| Pin 2 | AVSS β Analog ground / negative supply |
| Pin 3 | AIN0 β Analog input 0 |
| Pin 4 | AIN1 β Analog input 1 |
| Pin 5 | AIN2 β Analog input 2 |
| Pin 6 | AIN3 β Analog input 3 |
| Pin 7 | AIN4 β Analog input 4 |
| Pin 8 | AIN5 β Analog input 5 |
| Pin 9 | AINCOM β Common analog input |
| Pin 12 | REFP0 β Positive reference input |
| Pin 13 | REFN0 β Negative reference input |
| Pin 19 | XTAL1 β Crystal input / external clock |
| Pin 20 | XTAL2 β Crystal output |
| Pin 22 | SCLK β SPI serial clock |
| Pin 23 | DIN β SPI data in |
| Pin 24 | DOUT/DRDY β SPI data out / data ready |
| Pin 25 | CS β SPI chip select |
| Pin 26 | START β Conversion start control |
| Pin 27 | RESET β Device reset |
| Pin 28 | DVDD β Digital power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADS1263 is suitable for 6 applications: Weigh Scales and Load Cells, RTD and Thermocouple Temperature Measurement, Precision Industrial Process Control, Data Acquisition Systems, Strain Gauge and Bridge Sensor Interfaces, Test and Measurement Instrumentation.
Weigh Scales and Load Cells
The ADS1263 fits weigh-scale designs because its PGA (gain up to 32) connects directly to low-level bridge outputs, and its single-cycle settling digital filter delivers 130-dB rejection of 50-Hz/60-Hz line interference at all data rates. Placed between the load-cell bridge and the MCU SPI bus, it eliminates an external amplifier and external reference, while the integrated fault monitors detect sensor burnout for fail-safe designs.
Recommended
RTD and Thermocouple Temperature Measurement
The ADS1263 suits precision temperature sensing because its integrated IDAC excitation currents drive RTD sensors directly, and the auxiliary 24-bit ADC performs cold-junction temperature measurement in the background without interrupting the main channel. With 32-bit resolution and the 2.5V internal reference, sub-degree accuracy is achievable; low-drift design maintains accuracy across the -40C to +125C operating range in industrial environments.
Recommended
Precision Industrial Process Control
The ADS1263 fits process-control analog input modules because it combines 10 multiplexed single-ended (or 5 differential) channels, PGA gains up to 32, and single-cycle settling, enabling fast scanning of multiple sensors without filter settling delays. Its internal fault monitors flag open-wire and supply faults, improving system diagnostics; the SPI interface connects easily to industrial MCUs such as the TMS320F28004x family for control loops.
Recommended
Data Acquisition Systems
The ADS1263 is ideal for high-accuracy DAQ front ends: the 32-bit main ADC captures fine detail at up to 38.4 kSPS, while the 24-bit auxiliary ADC monitors a secondary signal or supply in the background. The 8x multiplexed GPIOs handle relay or range control directly, reducing external logic. Low noise and low drift ensure repeatable measurements across channels and temperature in rack-mounted instrumentation.
Recommended
Strain Gauge and Bridge Sensor Interfaces
For strain gauges, the ADS1263's PGA (up to 32x) and IDAC excitation currents form a complete bridge measurement chain on one chip. The 130-dB line-cycle rejection removes mains pickup from long sensor cables, and internal burnout detection identifies broken gauge elements. Using the single-cycle settling filter, each multiplexed bridge channel returns valid data immediately after channel switching, maximizing scan throughput.
Recommended
Test and Measurement Instrumentation
Bench and portable instruments benefit from the ADS1263's 32-bit resolution and low drift, which provide the dynamic range needed for DMM-grade measurements. The internal 2.5V reference and ADC self-test signal support built-in calibration routines, while the auxiliary ADC can track internal board temperature for drift compensation. SPI control from any MCU or FPGA allows flexible integration into modular instruments.
Recommended
Recommended Products Summary
Engineering reference data for ADS1263 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS1262 | ADS1256 | ADS1220 | ADS127L11 |
|---|---|---|---|---|---|
| Package | 28-TSSOP | 28-TSSOP - same | SSOP-28 - different | VSSOP-16 - different | TSSOP-28 - same size, different pinout |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 32 bit (+24-bit aux ADC) | 32 bit | 24 bit | 24 bit | 24 bit |
| Max Data Rate | 38.4 kSPS | 38.4 kSPS | 30 kSPS | 2 kSPS | 512 kSPS |
| PGA | Yes, up to 32x | Yes, up to 32x | Yes, up to 64x | Yes, up to 128x | No |
| Auxiliary ADC | Yes (24-bit) | No | No | No | No |
| Input Channels | 5 diff / 10 SE | 5 diff / 10 SE | 4 diff / 8 SE | 2 diff / 4 SE | 1 channel |
| Pin Compatible (drop-in) | Reference | Yes | No | No | No |
Key Differentiators
- Integrated auxiliary 24-bit ADC (vs ADS1262)
- Single-cycle settling digital filter (vs ADS1256)
- 32-bit resolution vs 24-bit alternatives (vs ADS1220)
Design Notes
Decouple AVDD and DVDD with 0.1uF ceramic capacitors placed as close to the pins as possible, plus bulk 1uF-10uF capacitance. Keep the analog input routing away from the SPI clock lines to prevent digital coupling into the 32-bit measurement path. Use a solid ground plane and separate the SPI return currents from the analog input section per TI ADS126x datasheet layout guidance.
Select PGA gain so the maximum sensor output maps close to the full-scale range - this maximizes signal-to-noise ratio. For multiplexed scanning, the single-cycle settling digital filter returns valid data on the first conversion after a channel change; do not add unnecessary settling delays as with traditional delta-sigma ADCs. Use the internal test signal to verify ADC health at startup.
When replacing an ADS1263 with an ADS1262, remember the auxiliary ADC registers do not exist on the ADS1262 - firmware reading them will return invalid data. Ensure the crystal or external clock on XTAL1/XTAL2 meets datasheet frequency requirements, and assert RESET after power-up before SPI communication. Do not exceed the AVDD-AVSS absolute maximum ratings with IDAC-driven sensor networks.
Compliance Information
RoHS compliance per TI product page. AEC-Q100 qualification not indicated for standard ADS1263.
