Part A
ADS1198CPAG
Texas Instruments
- Lifecycle
- Active
- Stock
- 3254 PCS
- Package
- TQFP-64
- Series
- Acquisition de données - Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The ADS1196CPAG is a functional replacement candidate for the ADS1198CPAG, sharing the same TQFP-64 package, 16-bit delta-sigma ADC architecture, and identical supply and temperature ranges, with the primary distinction being the reduced channel count (6 vs 8) and correspondingly lower power consumption. Designers must confirm that six channels satisfy the application's signal acquisition requirements before substituting.
Channel Count
Validation required
Package Type
High match
Resolution and ADC Architecture
High match
Supply Voltage and Operating Temperature
High match
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 | ADS1198CPAG | ADS1196CPAG | Why it matters |
|---|---|---|---|
| Number of input channels | 8 | 6 | Determines how many simultaneous biopotential/ECG signals can be acquired; a direct functional substitutability constraint. |
| Resolution | 16 bit | 16 bit | Sets the amplitude precision of the ADC; identical resolution means comparable signal fidelity. |
| Data rate (max) | 8 kSPS | 8 kSPS | Defines the maximum sampling throughput available for each channel; affects bandwidth and timing compatibility. |
| Supply voltage (analog/digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Must match the system power rail; identical range allows drop-in power compatibility. |
| Interface | SPI | SPI | Determines host communication protocol; identical SPI interface supports the same firmware/driver. |
| Package | 64-TQFP | 64-TQFP | Same package and pinout enable PCB footprint compatibility for substitution. |
| Integrated features | PGA, internal reference, lead-off detection, respiration | PGA, internal reference, lead-off detection, respiration | On-chip signal conditioning and diagnostics reduce external components; matching feature sets preserve system architecture. |
| Input-referred noise | Lower (8-channel variant) | Comparable per-channel noise | Noise performance affects ECG signal quality; channel count differences can influence overall noise and crosstalk behavior. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1198CPAG | ADS1196CPAG |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Number of Channels | 8 | 6 |
| Power (Watts) | 8.2 mW | 6.9 mW |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 1.65V ~ 3.6V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the primary difference between the ADS1198CPAG and ADS1196CPAG?
The ADS1198CPAG is an 8-channel, 16-bit delta-sigma analog front-end (AFE) for biopotential measurements, while the ADS1196CPAG is a 6-channel, 16-bit device in the same family. Both integrate a programmable gain amplifier, internal reference, oscillator, and SPI-compatible interface in a TQFP-64 package, but the ADS1198 provides two additional input channels.
Are the ADS1198CPAG and ADS1196CPAG pin-compatible?
Both devices are offered in the same 64-pin TQFP (PAG) package and share the same pinout family, but the ADS1196CPAG does not populate all channel inputs that the ADS1198CPAG uses. Designers should verify unused channel pins against the respective datasheets before substituting one for the other on an existing PCB.
Do both devices support the same data rate and resolution?
Yes. Both the ADS1198CPAG and ADS1196CPAG are 16-bit delta-sigma converters with programmable data rates from 250 SPS to 8 kSPS, and both include the same digital decimation filter and SPI interface, so resolution and throughput specifications are identical across the two parts.
Can the ADS1196CPAG be used as a drop-in replacement for the ADS1198CPAG?
Not directly. Although the package and core AFE architecture are shared, the ADS1196CPAG provides only 6 input channels versus 8 on the ADS1198CPAG. Any design requiring all eight channels must retain the ADS1198CPAG; substitution is only valid where the two unused channels are not needed and the pin configuration is confirmed against the datasheet.
What applications are these AFEs intended for?
Both the ADS1198CPAG and ADS1196CPAG are designed for biopotential signal acquisition, including ECG, EEG, and EMG systems, as well as patient monitoring and portable medical instrumentation, where their integrated PGA, reference, and lead-off detection reduce external component count.
Do both parts share the same supply voltage and interface requirements?
Yes. Both devices operate from an analog supply of 2.7 V to 5.25 V and a digital supply of 1.8 V to 3.6 V, and both communicate over a standard SPI-compatible serial interface, so the electrical and interface requirements are consistent between the ADS1198CPAG and ADS1196CPAG.