ADS1118IDGSR - 16-Bit 860-SPS 4-Channel ADC | TI
MPN: ADS1118IDGSR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.464 | $2.46 |
| 10 | $2.464 | $24.64 |
| 100 | $2.464 | $246.40 |
| 500 | $2.464 | $1,232.00 |
| 1,000 | $2.464 | $2,464.00 |
ADS1118IDGSR Overview
An ADC converts continuous analog voltage into a numeric value for processing, measurement, or control. The ADS1118 belongs to the delta-sigma ADC class, where an internal modulator and digital filter shape the conversion result. Its integrated PGA allows low-level sensor signals to be amplified before conversion, while the internal reference, oscillator, and temperature sensor reduce the number of external support components required in compact measurement designs.
The main headline specifications are 16-bit resolution, conversion rates up to 860 samples per second, four analog input channels, and operation across a -40°C to +125°C temperature range. The device supports SPI-compatible serial communication and is offered in a small 10-pin VSSOP package. The integrated reference and temperature sensor are especially useful for sensor measurements, thermocouple-related monitoring, and systems requiring a compact analog front end.
The delta-sigma architecture provides high resolution for low-frequency and slowly changing signals, while the programmable gain amplifier supports a range of input amplitudes. The internal oscillator allows operation without an external clock, which can simplify PCB design and reduce component count. The ADC is suitable when deterministic digital readout, modest conversion speed, and low power consumption are more important than very high sample rates.
Typical applications include industrial process monitoring, temperature sensing, pressure and strain-signal acquisition, portable instrumentation, environmental measurement, and low-power embedded sensing. The integrated temperature sensor can provide a local temperature reading, while the analog channels support external sensors such as thermistors, resistive bridges, potentiometers, and other slowly varying analog sources.
A key design consideration is analog signal conditioning and PCB layout. The sensor input must stay within the ADC input range, and the PGA gain must be selected so that the conditioned signal uses the converter’s available resolution without overloading the input. Decoupling capacitors should be placed close to the power pins, and the analog and digital return paths should be arranged to minimize noise coupling into the measurement channels. The 860-SPS maximum rate also means that applications requiring faster sampling need a different ADC architecture.
This page combines the manufacturer’s published ADS1118 features, distributor pricing and availability signals, package information, application guidance, and drop-in replacement analysis for engineers evaluating the ADS1118IDGSR.
Drop-in alternatives for ADS1118IDGSR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADS1118IDGSR (same form factor and footprint) — differing in Package, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADS1118IDGST
✅ Drop-In📋 Reference alternative (not in catalog)
ADS1118IRUGR
✅ Drop-In📋 Reference alternative (not in catalog)
ADS1118QDGSRQ1
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →ADS1114IDGST
✅ Drop-In📋 Reference alternative (not in catalog)
ADS1112IDGSR
✅ Drop-In📋 Reference alternative (not in catalog)
ADS1118IDGSR Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Conversion Rate | 860 samples/s |
| Analog Input Channels | 4 channels |
| ADC Architecture | Delta-sigma ADC |
| Programmable Gain Amplifier | Integrated PGA |
| Integrated Reference | Internal voltage reference |
| Integrated Oscillator | Internal oscillator |
| Temperature Sensor | Integrated high-accuracy temperature sensor |
| Digital Interface | SPI-compatible serial interface |
| Package | 10-VSSOP |
| Operating Temperature | -40°C to +125°C |
| Lifecycle Status | Active |
| RoHS Status | Compliant |
| Lead Time | 3-7 business days |
| Datasheet Revision | Rev. F |
| Supplier Package Description | 10-MSOP / 10-TFSOP |
| Product Category | Analog to Digital Converter |
ADS1118IDGSR 10-msop / 10-tfsop Pin Configuration Guide
Pin configuration for ADS1118IDGSR (10-msop / 10-tfsop package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for ADS1118IDGSR.
Refer to the datasheet for full pin configuration.
Typical Applications
ADS1118IDGSR is suitable for 6 applications: Industrial Process Monitoring, Temperature and Thermistor Sensing, Pressure and Strain-Signal Acquisition, Portable Environmental Monitoring, Battery-Powered Sensor Nodes, Precision Data Acquisition.
Industrial Process Monitoring
The ADS1118IDGSR fits industrial process monitoring because it combines 16-bit resolution, four analog input channels, and an integrated PGA in a compact 10-VSSOP. It can acquire slowly changing pressure, flow, level, or position signals without requiring a separate high-resolution ADC. The internal reference and oscillator reduce external support circuitry, while the 860-SPS rate is appropriate for supervisory measurements rather than fast process waveforms. A robust implementation should include input protection, filtering, calibration, and isolation where required by the plant environment.
Recommended
Temperature and Thermistor Sensing
The ADS1118IDGSR is suitable for temperature sensing because it includes an internal temperature sensor and four analog channels for external sensor signals. Its PGA can amplify small resistance-derived voltage changes from thermistors or RTDs, while the internal reference supports repeatable digital measurement. The ADC is especially useful when a compact controller needs both local temperature information and remote analog measurements. Designers still need to select the proper excitation, input divider, protection network, and conversion mode for the target sensor.
Recommended
Pressure and Strain-Signal Acquisition
The integrated programmable gain amplifier makes ADS1118IDGSR useful for low-level bridge or strain-gauge signals that need resolution before conversion. With four analog inputs, it can monitor one active sensor plus additional temperature or reference channels. The 16-bit converter and 860-SPS maximum rate are appropriate for slow force, pressure, and load-cell measurements, while the small package supports compact instrumentation. The analog front end must control excitation drift, input common-mode range, filtering, and calibration to preserve measurement accuracy.
Recommended
Portable Environmental Monitoring
ADS1118IDGSR supports portable environmental monitoring by combining low-power operation, integrated conversion functions, and a compact package. It can measure light, resistive, capacitive, or other slowly changing environmental signals while the internal temperature sensor provides local status information. The four-channel ADC allows multiple sensors to share one measurement front end, and the internal oscillator avoids a mandatory external clock. Battery life depends on the selected conversion mode, sampling interval, PGA gain, and sleep strategy, so firmware should disable conversions between measurements when appropriate.
Recommended
Battery-Powered Sensor Nodes
The ADS1118IDGSR is appropriate for battery-powered sensor nodes where every external component affects enclosure size and standby power. Its integrated PGA, voltage reference, oscillator, and temperature sensor consolidate multiple functions into one ADC package. The 16-bit resolution can improve the usable dynamic range of low-level analog sensors, while the 860-SPS ceiling is more than adequate for many environmental and condition-monitoring nodes. To maximize battery life, select the lowest useful PGA gain, use the appropriate data rate, batch SPI transactions, and place the converter into a power-saving state between samples.
Recommended
Precision Data Acquisition
The ADS1118IDGSR is useful for compact precision data-acquisition modules that measure multiple low-speed analog channels through an SPI host controller. Four inputs provide flexibility for sensor multiplexing, diagnostics, or reference channels, while the integrated PGA and reference reduce analog front-end complexity. Its 16-bit output and 860-SPS maximum rate are well matched to laboratory, control, and condition-monitoring measurements. For systems needing simultaneous sampling, high-frequency waveforms, or substantially faster throughput, a dedicated higher-speed ADC architecture would be more appropriate.
Recommended
Recommended Products Summary
Engineering reference data for ADS1118IDGSR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS1118IDGST | ADS1118IRUGR | ADS1118QDGSRQ1 | ADS1114IDGST | ADS1112IDGSR |
|---|---|---|---|---|---|---|
| Package | 10-VSSOP | 10-VSSOP family candidate | 10-pin family candidate | 10-VSSOP family candidate | 10-VSSOP family candidate | 10-VSSOP family candidate |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
Key Differentiators
- Integrated measurement front end (vs ADS1118IDGST)
- Four-channel precision conversion (vs ADS1112IDGSR)
- Wide specified temperature operation (vs ADS1114IDGST)
- Active commercial sourcing (vs ADS1118IRUGR)
Design Notes
Place the ADC supply bypass capacitor as close as possible to the device power pins, and route analog inputs away from SPI clock and data traces. Keep sensor returns and the analog ground path compact, while separating noisy switching-current paths from the measurement inputs. Because the converter provides 16-bit resolution, small layout-induced errors can become significant if analog traces are long, adjacent to high-current paths, or inadequately shielded.
Do not select PGA gain without checking the maximum input voltage of the selected channel and the actual sensor output range. Excessive gain can overload the ADC, while insufficient gain leaves unused resolution and increases effective quantization error. Also verify the input configuration for single-ended versus differential measurements; the ADS1118 is a 4-channel ADC, but the exact channel multiplexing and input limits must follow the manufacturer pin configuration and datasheet.
SPI clock edges and digital control signals can couple into the analog inputs if the analog front end is laid out poorly. Use a continuous ground reference, avoid routing sensitive sensor inputs beneath or beside the digital interface, and consider an input RC filter with values selected from the required bandwidth. The 860-SPS ceiling is not a substitute for input filtering; filtering must account for sensor noise, ADC settling, and the selected PGA gain.
The ADS1118IDGSR is intended for low-power measurement systems, so firmware can reduce energy consumption by using a suitable conversion data rate, batching SPI reads, and disabling conversions between samples. Confirm the device’s low-power modes and current specifications from the manufacturer datasheet before estimating battery life. External sensor excitation and front-end amplifier current may dominate the total system consumption even when the ADC itself is operating efficiently.
Compliance Information
The verified FindMyChip result explicitly identifies ADS1118IDGSR as RoHS Compliant. REACH, AEC-Q100 status, lead-free status, halogen-free status, and conflict-minerals information were not explicitly confirmed in the supplied data.
