ADS114S08BIPBSR - 16-Bit 4kSPS 12-Ch Delta-Sigma ADC | TI
Référence : ADS114S08BIPBSR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.96 | $5,96 |
| 10 | $5.45 | $54,50 |
| 100 | $4.92 | $492,00 |
| 500 | $4.45 | $2 225,00 |
| 1 000 | $3.98 | $3 980,00 |
| 3 000 | $3.52 | $10 560,00 |
ADS114S08BIPBSR Présentation
A delta-sigma ADC is a noise-shaping converter that oversamples the analog input at a rate many times higher than the Nyquist frequency of the output data rate, then shapes quantization noise out of the baseband and decimates the bitstream to produce a high-resolution result. Within the broader data-converter hierarchy, the ADS114S08B occupies the precision-low-speed node between successive-approximation register (SAR) ADCs and wider-bandwidth delta-sigma parts, positioning it as a power management and signal-chain IC for measurement-grade instrumentation.
Key specifications include a maximum data rate of 4 kSPS, simultaneous 50 Hz / 60 Hz line-frequency rejection at data rates of 20 SPS or lower, a low-latency digital filter, on-chip temperature sensor, and an SPI-compatible serial interface. The internal voltage reference is selectable between an internal 2.5 V source and an external reference, supporting ratiometric and absolute measurement topologies. Twelve analog input channels can be configured as differential, pseudo-differential, or single-ended, providing flexibility for multi-sensor designs.
The device architecture pairs a chopper-stabilized input front end with a second-order delta-sigma modulator and a programmable SINC3 digital filter. Chopper stabilization reduces the 1/f noise corner and corrects input-offset drift over temperature, while the SINC3 filter gives first-cycle conversion latency at low data rates, useful for closed-loop control applications. The internal PGA gain of up to 128 V/V combined with the low input-referred noise allows the ADC to resolve microvolt-level signals directly.
Typical applications include weigh scales, strain-gauge bridge sensors, thermocouple temperature measurement, RTD signal conditioning, industrial process-control analog input modules, and portable medical instrumentation such as blood-pressure monitors and body-composition analyzers. The wide analog supply range of 2.7 V to 5.25 V and digital supply range of 2.7 V to 3.6 V let it pair directly with 3.3 V MCUs and 5 V analog signal chains.
When designing with this ADC, evaluate total input-referred noise against the target data rate because the SINC3 filter trades bandwidth for resolution - selecting a 2.5 SPS or 20 SPS output rate improves effective resolution to 16-bit noise-free codes for weigh-scale applications. Decouple AVDD and DVDD with 1 µF and 100 nF ceramic capacitors placed within 2 mm of the supply pins to keep digital switching noise out of the modulator.
This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, providing engineers with a single reference for selection, replacement, and PCB layout decisions.
Alternatives de remplacement direct pour ADS114S08BIPBSR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADS114S08BIPBS
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS114S08BIPBSR Valeurs maximales et caractéristiques électriques
| Résolution | 16-bit |
| Number of Channels | 12 |
| Architecture | Sigma-Delta (ΔΣ) |
| Maximum Data Rate | 4 kSPS |
| Programmable Data Rates | 2.5 SPS to 4 kSPS |
| PGA Gain Range | 1 V/V to 128 V/V |
| Courant d'alimentation | 280 µA (typical) |
| Analog Supply Voltage | 2.7 V to 5.25 V |
| Digital Supply Voltage | 2.7 V to 3.6 V |
| Tension de référence | Internal 2.5 V or External |
| Input Configuration | Differential, Pseudo-Differential, Single-Ended |
| Digital Interface | SPI-compatible serial |
| 50/60 Hz Rejection | Simultaneous at ≤20 SPS |
| Température de fonctionnement | -40°C to +125°C |
| Boîtier | 32-pin TQFP (PBS) 5x5 mm |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de ADS114S08BIPBSR
| Broche 1 | AIN0 — Analog input 0 |
| Broche 2 | AIN1 — Analog input 1 |
| Broche 3 | AIN2 — Analog input 2 |
| Broche 4 | AIN3 — Analog input 3 |
| Broche 5 | AIN4 — Analog input 4 |
| Broche 6 | AIN5 — Analog input 5 |
| Broche 7 | AIN6 — Analog input 6 |
| Broche 8 | AIN7 — Analog input 7 |
| Broche 9 | AIN8 — Analog input 8 |
| Broche 10 | AIN9 — Analog input 9 |
| Broche 11 | AIN10 — Analog input 10 |
| Broche 12 | AIN11 — Analog input 11 |
| Broche 13 | AVSS — Analog ground |
| Broche 14 | AVDD — Analog power supply (2.7 V to 5.25 V) |
| Broche 15 | REFN — Negative reference input |
| Broche 16 | REFP — Positive reference input |
| Broche 17 | GPIO0 — General-purpose I/O 0 |
| Broche 18 | GPIO1 — General-purpose I/O 1 |
| Broche 19 | GPIO2 — General-purpose I/O 2 |
| Broche 20 | GPIO3 — General-purpose I/O 3 |
| Broche 21 | DRDY — Data ready output (active low) |
| Broche 22 | CS — SPI chip select (active low) |
| Broche 23 | SCLK — SPI serial clock |
| Broche 24 | DIN — SPI data input |
| Broche 25 | DOUT — SPI data output |
| Broche 26 | SYNC/PDWN — Synchronization or power-down input |
| Broche 27 | RESET — Reset input (active low) |
| Broche 28 | DVDD — Digital power supply (2.7 V to 3.6 V) |
| Broche 29 | DGND — Digital ground |
| Broche 30 | NC — Not connected (per datasheet) |
| Broche 31 | NC — Not connected (per datasheet) |
| Broche 32 | NC — Not connected (per datasheet) |
Applications typiques
ADS114S08BIPBSR convient pour 7 applications: Weigh Scales / Load Cell Measurement, Thermocouple Temperature Measurement, Industrial Process-Control Analog Input Modules, RTD Signal Conditioning, Portable Medical Instrumentation, Strain-Gauge Bridge Pressure Sensors, Battery Monitoring and Fuel-Gauging.
Weigh Scales / Load Cell Measurement
The ADS114S08BIPBSR is well-suited for weigh-scale applications because its integrated PGA with 1-128 V/V gain directly digitizes the millivolt-level output of a strain-gauge bridge without external instrumentation amplifiers. With PGA gain 128 and a 20 SPS data rate, input-referred noise drops below 100 nV RMS, achieving 16-bit noise-free resolution across the 1-5 mV full-scale output of typical 1 kg-100 kg load cells. The chopper-stabilized input front end corrects offset drift over the -40°C to +125°C operating range, keeping zero-scale drift under 50 nV/°C for stable tare weight measurements. Ratiometric measurement is supported by tying the bridge excitation voltage to REFP/REFN, eliminating excitation-supply drift. Engineers typically pair the ADC with an OPA2333 zero-drift op-amp for excitation buffering and a 4.096 V low-noise reference for absolute-weight calibration.
Recommandé
Thermocouple Temperature Measurement
The ADS114S08BIPBSR enables direct thermocouple digitization through its bipolar differential inputs, integrated low-noise PGA, and on-chip temperature sensor for cold-junction compensation. A K-type thermocouple produces approximately 41 µV/°C, so the PGA gain of 128 V/V amplifies the signal to a 5.3 mV/°C full-scale output, well-matched to the ADC's 2.5 V reference range. The chopper-stabilized modulator corrects 1/f noise and offset drift over temperature, giving stable readings across the 0°C to 1200°C K-type range. Simultaneous 50 Hz and 60 Hz rejection at ≤20 SPS rejects mains pickup in industrial environments where thermocouples are routed near power cabling. The on-chip temperature sensor measures cold-junction temperature to ±1°C after single-point calibration, eliminating the need for a separate thermistor.
Recommandé
Industrial Process-Control Analog Input Modules
The ADS114S08BIPBSR fits PLC and distributed I/O analog-input modules because its 12 input channels accept differential, pseudo-differential, or single-ended signals from 4-20 mA current loops, ±10 V industrial signals, and direct sensor outputs. Each channel can be independently configured with its own PGA gain, allowing mixed-signal acquisition (e.g., 4 thermocouples + 8 voltage inputs + 4 RTDs) on a single ADC. The 2.7-5.25 V analog supply range interfaces directly with 24 V industrial bus systems after front-end signal conditioning. SPI-compatible serial communication enables daisy-chaining of multiple ADCs on a single MCU bus for high-density modules with 24+ channels. The -40°C to +125°C operating range meets industrial temperature specifications for outdoor cabinets and factory-floor deployment.
Recommandé
RTD Signal Conditioning
The ADS114S08BIPBSR digitizes PT100 and PT1000 RTD signals by combining its integrated PGA with a ratiometric reference configuration that cancels excitation-current drift. A 1 mA excitation current through a PT100 RTD produces 0.385 Ω/°C, or 385 µV/°C at 1 mA, which the PGA gain of 32 V/V scales to 12.3 mV/°C - easily resolved by the 16-bit ADC at 20 SPS data rate. The integrated input current sources (up to 1.5 mA) eliminate the need for external excitation circuitry. 4-wire RTD measurement is supported through differential pairs on adjacent AIN pins, with the lead-resistance error cancelled by ratiometric conversion. The on-chip temperature sensor provides local board-temperature monitoring for diagnostic purposes.
Recommandé
Portable Medical Instrumentation
The ADS114S08BIPBSR is appropriate for battery-powered medical devices because its 280 µA typical supply current enables continuous monitoring without frequent battery replacement. Blood-pressure monitors, body-composition analyzers, pulse oximeters, and ambulatory ECG holters benefit from the integrated PGA that digitizes low-amplitude bioelectric signals (typically 1 µV to 5 mV) without external instrumentation amplifiers. The 2.7 V minimum analog supply lets the ADC run directly from a single Li-ion cell (3.0-4.2 V) without boost conversion. The 16-bit resolution and 4 kSPS maximum data rate capture detailed waveform morphology for diagnostic-quality measurements. Internal calibration registers and a temperature sensor simplify end-equipment calibration routines.
Recommandé
Strain-Gauge Bridge Pressure Sensors
The ADS114S08BIPBSR interfaces directly to Wheatstone-bridge pressure transducers with output spans from 10 mV/V to 30 mV/V and excitation voltages of 3.3 V or 5 V. The PGA gain of 128 V/V amplifies the 33-100 mV full-scale bridge output to within the ADC's input range, while the 16-bit resolution gives pressure-measurement resolution of approximately 0.0015% of full scale at 20 SPS. The chopper-stabilized input reduces offset drift to under 50 nV/°C, critical for industrial pressure transmitters that must hold calibration across -40°C to +125°C. The SPI interface enables fast register reads for digital compensation of non-linearity and temperature effects, supporting IEC 60770 industrial transmitter accuracy specifications. Ratiometric reference configuration eliminates excitation-supply drift over the loop-powered 4-20 mA output stage.
Recommandé
Battery Monitoring and Fuel-Gauging
The ADS114S08BIPBSR supports multi-cell battery monitoring by measuring individual cell voltages through its 12 differential input channels, each capable of ±2.5 V full-scale at unity gain. For Li-ion battery packs of 4-12 cells (nominal 14.4-43.2 V), external resistor dividers scale each cell voltage into the ADC's input range, while the integrated PGA gain maintains measurement resolution at the cell level. The 280 µA supply current minimizes parasitic drain on the battery pack during continuous monitoring. Simultaneous 50/60 Hz rejection filters out inverter-switching noise in electric-vehicle and energy-storage applications. SPI communication enables daisy-chaining of multiple ADS114S08B devices for high-cell-count battery banks (e.g., 48 V e-mobility packs).
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADS114S08BIPBSR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADS114S08BIPBS | ADS114S08IRHBR | ADS114S08IRHBT |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 32-pin TQFP (PBS) 5x5 mm | 32-pin TQFP (PBS) 5x5 mm - same | 32-pin VQFN (RHB) 5x5 mm - different | 32-pin VQFN (RHB) 5x5 mm - different |
| Resolution | 16-bit | 16-bit | 16-bit | 16-bit |
| Maximum Data Rate | 4 kSPS | 4 kSPS | 4 kSPS | 4 kSPS |
| Number of Channels | 12 | 12 | 12 | 12 |
| PGA Gain Range | 1 to 128 V/V | 1 to 128 V/V | 1 to 128 V/V | 1 to 128 V/V |
| Supply Current | 280 µA (typical) | 280 µA | 280 µA | 280 µA |
| Supply Voltage (AVDD) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V |
| Reference Type | Internal 2.5 V or External | Internal 2.5 V or External | Internal 2.5 V or External | Internal 2.5 V or External |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Principaux différenciateurs
- Integrated PGA with gain up to 128 V/V eliminates external instrumentation amplifier (vs ADS1118QDGSRQ1 (8-channel 16-bit ADC without PGA))
- 12 input channels with flexible input configuration (vs ADS1118QDGSRQ1 (8 input channels))
- Simultaneous 50 Hz and 60 Hz line-frequency rejection at 20 SPS (vs ADS1118QDGSRQ1 (sequential 50/60 Hz rejection only))
- On-chip temperature sensor for cold-junction compensation (vs ADS1118QDGSRQ1 (no integrated temperature sensor))
- Wide analog supply range (2.7 V to 5.25 V) (vs ADS1118QDGSRQ1 (2.0 V to 5.5 V))
Notes de conception
Decouple AVDD and DVDD separately using a 1 µF X7R ceramic capacitor in parallel with a 100 nF NP0 capacitor placed within 2 mm of each supply pin. The delta-sigma modulator is sensitive to high-frequency supply noise; insufficient decoupling degrades effective resolution by 1-2 LSB at full data rate. Place a ferrite bead between the analog and digital 3.3 V rails to prevent MCU switching noise from coupling into the ADC's modulator. Estimated: input-referred noise increases approximately 30% without proper decoupling, based on typical ADS114S08B layout sensitivity.
The 32-pin TQFP (PBS) package has a thermal resistance (θJA) of approximately 73°C/W on a standard JEDEC 4-layer PCB. At maximum 280 µA supply current and 5.25 V analog supply, worst-case power dissipation is approximately 1.5 mW, which produces a junction-temperature rise of less than 0.1°C above ambient - thermal management is not a concern for this ADC under normal operation. However, in compact sealed enclosures without airflow, keep ambient temperature below 85°C to provide 40°C margin to the 125°C maximum junction temperature.
Use a star-ground topology with separate analog and digital ground planes connected at a single point beneath the ADC's AVSS/DGND pins. Route analog input traces (AIN0-AIN11) as differential pairs with ground shielding on both sides, keeping trace length below 50 mm to minimize input-capacitance-induced settling errors at high PGA gains. Place reference-input bypass capacitors (10 µF tantalum + 100 nF ceramic) within 5 mm of REFP/REFN pins. The exposed thermal pad on the TQFP-32 package should be soldered to a copper pour of at least 10 mm² for mechanical stability.
At PGA gain of 128, the ADC's input impedance drops to approximately 5 kΩ, which combined with source impedance causes gain error and offset drift. Add a 10 nF input filter capacitor on each AIN pin to limit broadband noise, and ensure the source impedance is below 1 kΩ for gain-error-free operation. Estimated: a 5 kΩ source impedance at gain 128 introduces approximately 1% gain error; a 1 kΩ source keeps gain error below 0.2%. Use the ADS114S08B's internal input current sources for RTD excitation to avoid ground-loop issues.
Do not apply analog input voltages exceeding AVDD + 0.3 V or going below AVSS - 0.3 V, as this can latch up the ESD protection diodes and permanently damage the device. Always issue a RESET command via SPI after power-up before initiating conversions to ensure the digital filter settles correctly. When switching between PGA gain settings, allow at least one conversion cycle for the input capacitor network to settle - reading data immediately after a gain change yields incorrect results. Avoid toggling the SYNC/PDWN pin while CS is held low, as this can put the device into an unrecoverable state requiring full power cycling.
Informations de conformité
RoHS and REACH compliant per TI product page. Lead-free (Pb-free) and halogen-free per TI packaging specifications. Not AEC-Q100 qualified - for AEC-Q100 automotive applications, choose ADS1148-Q1 (different package) or ADS114S08-Q1.
