Part A
ADS114S08IPBS
Texas Instruments
- Lifecycle
- Active
- Stock
- 4543 PCS
- Package
- TQFP-32
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADS114S08IPBS and ADS1196CPAG are not drop-in replacements for one another. The ADS114S08IPBS is a 16-bit, 8-channel precision delta-sigma ADC with an SPI interface in a TQFP-32 package, while the ADS1196CPAG is a 16-bit, 6-channel biopotential front-end with integrated ECG/EEG features in a TQFP-64 package. Their channel counts, package footprints, and target applications differ substantially, so a direct board-level substitution is not feasible without redesign.
Different channel count
Different package footprint
Different integrated features
Different target application
Parts at a glance
Part B
ADS1196CPAG
Texas Instruments
- Lifecycle
- Active
- Stock
- 3634 PCS
- Package
- TQFP-64
- Series
- Acquisition de données - Analog Front End (AFE)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS114S08IPBS | ADS1196CPAG | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit delta-sigma ADCs, so nominal resolution is equivalent for substitutability. |
| Number of input channels | 8 (single-ended) / 4 (differential) | 6 (single-ended) / 3 (differential) | Channel count determines how many signals can be measured; the ADS114S08 offers more inputs than the ADS1196. |
| Maximum sample rate (SPS) | 2000 | 8000 | Sample rate affects the bandwidth of signals that can be captured; the ADS1196 supports faster sampling. |
| Interface type | SPI | SPI | Both use SPI, so the host microcontroller interface is compatible between the two parts. |
| Supply voltage (analog) | 2.7 V to 5.25 V (AVDD) | 2.7 V to 5.25 V (AVDD) | Analog supply range must match the system rail; both parts support the same AVDD range. |
| Integrated PGA | Yes (1 to 128 gain) | Yes (1 to 12 gain) | A PGA allows direct connection of small signals; the ADS114S08 offers higher maximum gain. |
| Package | TQFP-32 | TQFP-64 | Package footprint and pin count affect PCB layout and drop-in compatibility; these differ significantly. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | Temperature range determines suitability for harsh environments; the ADS114S08 supports a wider range. |
| Integrated features | Internal reference, oscillator, temperature sensor, burnout detection | Internal reference, oscillator, respiration measurement, lead-off detection | On-chip features reduce external component count; the ADS1196 targets ECG/biopotential applications while the ADS114S08 targets general precision sensing. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS114S08IPBS | ADS1196CPAG |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Number of Channels | - | 6 |
| Power (Watts) | - | 6.9 mW |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | 1.65V ~ 3.6V |
| Mounting Type | - | Surface Mount |
| Sampling Rate(Per Second) | 4k | - |
| Number of Inputs | 12 | - |
| Input Type | Differential, Pseudo-Differential, Single Ended | - |
| Data Interface | SPI | - |
| Configuration | MUX-PGA-ADC | - |
| Number of A/D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External, Internal | - |
| Features | PGA, Temperature Sensor | - |
| Operating Temperature | -50°C ~ 125°C | - |
Frequently asked questions
What are the primary functional differences between the ADS114S08IPBS and the ADS1196CPAG?
The ADS114S08IPBS is a 16-bit, 8-channel delta-sigma ADC designed for precision sensor measurement, featuring a programmable gain amplifier (PGA), internal oscillator, and SPI interface in a TQFP-32 package. The ADS1196CPAG is a 24-bit, 6-channel simultaneously sampling delta-sigma ADC with an integrated ECG front-end, respiration impedance measurement, and SPI interface in a TQFP-64 package. The ADS114S08IPBS targets general-purpose precision sensing, while the ADS1196CPAG targets biopotential and ECG applications.
Are the ADS114S08IPBS and ADS1196CPAG pin-to-pin or package compatible?
No. The ADS114S08IPBS is supplied in a 32-pin TQFP (PBS) package, while the ADS1196CPAG is supplied in a 64-pin TQFP (PAG) package. The different pin counts and pin functions prevent direct PCB footprint compatibility, so these devices are not drop-in replacements for each other.
How do the resolution and data rate specifications compare between the two devices?
The ADS114S08IPBS provides 16-bit resolution with programmable data rates up to 2 kSPS. The ADS1196CPAG provides 24-bit resolution with programmable data rates up to 8 kSPS per channel. The ADS1196CPAG offers higher resolution and higher maximum throughput, while the ADS114S08IPBS offers 16-bit precision at lower data rates for general sensor applications.
Do both devices include an integrated programmable gain amplifier (PGA)?
Yes. The ADS114S08IPBS includes an integrated low-noise PGA with selectable gains from 1 to 128. The ADS1196CPAG includes an integrated PGA with selectable gains of 1, 2, 3, 4, 6, 8, and 12. Both devices allow direct connection of low-level sensor signals without external amplification, though the available gain settings differ.
What are the supply voltage requirements for the ADS114S08IPBS and ADS1196CPAG?
The ADS114S08IPBS operates from an analog supply (AVDD) of 2.7 V to 5.25 V and a digital supply (DVDD) of 2.7 V to 3.6 V. The ADS1196CPAG operates from an analog supply (AVDD) of 2.7 V to 5.25 V and a digital supply (DVDD) of 1.7 V to 3.6 V. Both devices support unipolar and bipolar analog supplies within their specified ranges.
Which device is better suited for ECG or biopotential measurement applications?
The ADS1196CPAG is specifically designed for ECG and biopotential applications, integrating a 6-channel simultaneously sampling 24-bit ADC, a respiration impedance measurement channel, lead-off detection, and a Wilson Central Terminal (WCT) buffer. The ADS114S08IPBS is a general-purpose precision ADC without these dedicated biopotential features, making the ADS1196CPAG the appropriate choice for ECG front-end designs.
How do the input channel configurations differ between the ADS114S08IPBS and ADS1196CPAG?
The ADS114S08IPBS provides 8 single-ended or 4 differential input channels with a flexible input multiplexer. The ADS1196CPAG provides 6 differential input channels that are sampled simultaneously, which is essential for multi-lead ECG acquisition where phase alignment between channels matters. The ADS114S08IPBS uses a multiplexed architecture, so channels are sampled sequentially rather than simultaneously.
What digital interfaces do the ADS114S08IPBS and ADS1196CPAG support?
Both devices use a serial peripheral interface (SPI) for communication with a host microcontroller. The ADS114S08IPBS supports SPI with a dedicated data-ready (DRDY) output. The ADS1196CPAG also supports SPI and includes a DRDY output along with additional control and status signals for its ECG-specific functions. Both are compatible with standard SPI hosts, but register maps and command sets differ between the two devices.