Specifications
| Type | Description |
|---|---|
| Part Number | ADS1118 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | X2QFN-10 1.50 mm x 2.00 mm, 0.4 mm height; VSSOP-10 3.00 mm x 3.00 mm |
| Component Type | Other |
| ADC Resolution | 16-bit |
| Interface Type | SPI-compatible serial peripheral interface |
| Supply Voltage Range | 2 V to 5.5 V |
| Supply Current | 150 uA in continuous-conversion mode |
| Power-Down Behavior | automatic power down after conversion in single-shot mode |
| Programmable Data Rate | 8 SPS to 860 SPS |
| Maximum Conversion Rate | 860 samples per second |
| Settling Behavior | single-cycle settling |
| Voltage Reference | internal low-drift voltage reference |
| Temperature Sensor | internal temperature sensor |
| Temperature Sensor Accuracy | 0.5 degC maximum error from 0 degC to 70 degC |
| Oscillator | internal oscillator |
| Programmable Gain Amplifier | internal PGA |
| PGA Input Range | +/-256 mV to +/-6.144 V |
| Analog Input Channels | four single-ended inputs or two differential inputs |
| Input Multiplexer | supports two differential or four single-ended inputs |
| Operating Temperature Range | -40 degC to +125 degC |
| Package Option | X2QFN-10, nominal body size 1.50 mm x 2.00 mm |
| Package Option | VSSOP-10, nominal body size 3.00 mm x 3.00 mm |
| Package Height | 0.4 mm for ultrasmall X2QFN package |
| Intended Sensor Measurement Use | common sensor signals including thermocouples and thermistors |
| Cold-Junction Compensation | supported using internal temperature sensor |
| Functional Blocks | MUX, PGA, 16-bit ADC, digital filter/interface, voltage reference, oscillator, temperature sensor |
| Supply Decoupling Example | 0.1 uF between VDD and GND in typical 3.3 V application block diagram |
| Example Supply Voltage | 3.3 V in K-type thermocouple measurement example circuit |
| Datasheet Status | request_only |
Product Overview
The ADS1118 is a Texas Instruments 16-bit analog-to-digital converter for Signal_Chain designs. Its integrated signal path includes an input multiplexer, internal PGA, 16-bit ADC, digital filter/interface, internal low-drift voltage reference, internal oscillator, and internal temperature sensor. The input multiplexer supports two differential or four single-ended inputs, while the PGA provides programmable full-scale input ranges from +/-256 mV to +/-6.144 V.
The converter uses an SPI-compatible serial peripheral interface for data transfer and supports programmable data rates from 8 SPS to 860 SPS, with a maximum conversion rate of 860 samples per second. The ADC conversion/filter operation provides single-cycle settling. The device operates across a 2 V to 5.5 V supply range, with 150 uA supply current in continuous-conversion mode and automatic power down after conversion in single-shot mode.
Package choices include X2QFN-10 with a 1.50 mm x 2.00 mm nominal body size and 0.4 mm height, and VSSOP-10 with a 3.00 mm x 3.00 mm nominal body size. A typical 3.3 V K-type thermocouple measurement example includes 0.1 uF supply decoupling between VDD and GND.
Key Features
- 16-bit integrated analog-to-digital converter
- SPI-compatible serial peripheral interface for data transfer
- 2 V to 5.5 V supply voltage range
- 150 uA current in continuous-conversion mode
- Automatic power down after single-shot conversions
- Programmable data rate from 8 SPS to 860 SPS
- Single-cycle settling for ADC conversion and filter operation
- Internal low-drift voltage reference and oscillator
- Internal PGA with +/-256 mV to +/-6.144 V ranges
- Four single-ended inputs or two differential inputs
- Internal temperature sensor with 0.5 degC maximum error
- X2QFN-10 and VSSOP-10 package options
Typical Applications
- Thermocouple measurement
- Thermistor measurement
- Common sensor signal acquisition
- Cold-junction compensation
- K-type thermocouple circuits
- Low-power sensor conversion
Procurement Notes
When requesting a quote for ADS1118, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of converter is the ADS1118?
The ADS1118 is a Texas Instruments 16-bit analog-to-digital converter in the Signal_Chain category. It integrates a MUX, PGA, ADC, digital filter/interface, voltage reference, oscillator, and temperature sensor.
How many analog inputs does the ADS1118 support?
The ADS1118 input multiplexer supports either four single-ended analog inputs or two differential inputs. This configuration is listed for the device MUX operation and analog input channel capability.
What supply range and current are specified for ADS1118?
The ADS1118 operates from a 2 V to 5.5 V supply range. The extracted datasheet facts specify 150 uA supply current in continuous-conversion mode and automatic power down after conversion in single-shot mode.
Can ADS1118 be used with thermocouple measurements?
Yes. The extracted facts identify common sensor signals including thermocouples and thermistors as intended measurement uses. Cold-junction compensation is supported using the internal temperature sensor for thermocouple measurement applications.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.