Part A
ADS1294IPAG
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 1382 PCS
- Package
- TQFP-64
- Series
- Data Acquisition - Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The ADS1294IPAG and ADS1296IPAGR share the same TQFP-64 package, pinout, supply architecture, and SPI interface, making them functionally interchangeable on an existing PCB. The ADS1296IPAGR provides two additional input channels (6 vs. 4) and a higher aggregate data rate, so it can directly replace the ADS1294IPAG where extra channel count or throughput is beneficial, provided firmware channel mapping and register configuration are updated accordingly.
Channel Count
High match
Package and Pinout
High match
Supply Voltage and Interface
High match
Maximum Data Rate
Validation required
Parts at a glance
Part B
ADS1296IPAGR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 9357 PCS
- Package
- TQFP-64
- Series
- Data Acquisition - 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 | ADS1294IPAG | ADS1296IPAGR | Why it matters |
|---|---|---|---|
| Number of input channels | 4 | 6 | Channel count determines how many simultaneous biopotential signals can be acquired, directly affecting functional substitutability in multi-lead ECG/EEG designs. |
| Resolution | 24 bit | 24 bit | Resolution sets the smallest signal the ADC can resolve; identical 24-bit resolution means equivalent precision for low-amplitude biopotential measurements. |
| Data rate (max) | 32 kSPS | 32 kSPS | Maximum sample rate bounds the bandwidth of signals that can be captured; matching rates ensure equivalent timing performance. |
| Supply voltage | 2.7 V to 5.25 V (analog), 1.65 V to 3.6 V (digital) | 2.7 V to 5.25 V (analog), 1.65 V to 3.6 V (digital) | Supply requirements determine power-rail compatibility; identical ranges allow drop-in use in the same system power architecture. |
| Interface | SPI | SPI | The digital interface must match the host controller; both using SPI ensures firmware and hardware compatibility. |
| Integrated PGA | Yes | Yes | An integrated programmable gain amplifier allows direct connection of small biopotential signals without external front-end circuitry. |
| Package | TQFP-64 | TQFP-64 | Package and footprint must match for board-level interchangeability; identical TQFP-64 packages allow the same PCB layout. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range defines the environments in which the device can reliably operate; matching ranges indicate equivalent environmental robustness. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1294IPAG | ADS1296IPAGR |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Number of Channels | 4 | 6 |
| Power (Watts) | 10.1 mW | 17.5 mW |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| 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 ADS1294IPAG and ADS1296IPAGR?
The ADS1294IPAG is a 4-channel, 24-bit delta-sigma analog front-end (AFE) for biopotential measurements, while the ADS1296IPAGR is a 6-channel device in the same family. Both integrate programmable gain amplifiers, internal reference, and ECG/EEG-specific features, but the ADS1296IPAGR provides two additional input channels. The "R" suffix on ADS1296IPAGR denotes tape-and-reel packaging, whereas ADS1294IPAG is supplied in a tray.
Are the ADS1294IPAG and ADS1296IPAGR pin-compatible?
No. Although both are offered in the same 64-pin TQFP package (PAG suffix), the ADS1294IPAG uses 4 input channels and the ADS1296IPAGR uses 6, so the channel input pins and associated routing differ. They are not drop-in replacements and require separate PCB layouts.
Do both devices share the same resolution and data rate specifications?
Yes. Both the ADS1294IPAG and ADS1296IPAGR are 24-bit delta-sigma converters with programmable data rates from 250 SPS to 32 kSPS per channel, and both support the same PGA gains (1, 2, 3, 4, 6, 8, 12) as specified in the Texas Instruments datasheet.
What is the difference in power consumption between the two parts?
Because the ADS1296IPAGR has two additional channels, its typical supply current is higher than that of the ADS1294IPAG. Per the TI datasheet, the ADS1294IPAG typically draws about 4.3 mW per channel, while the ADS1296IPAGR draws approximately 5.4 mW per channel at 3 V, so total power scales with channel count.
Can the ADS1294IPAG be used as a substitute for the ADS1296IPAGR in an existing design?
Only if the design does not require the two extra channels of the ADS1296IPAGR and the PCB is redesigned for the 4-channel pinout. The devices are not pin-compatible, so a direct substitution on the same board is not possible without layout changes and revalidation against the TI datasheet.
What package and operating temperature range do both devices support?
Both the ADS1294IPAG and ADS1296IPAGR are supplied in a 64-pin TQFP (PAG) package and are specified for the industrial temperature range of –40°C to +85°C, as stated in the Texas Instruments datasheet.
Do both parts include the same integrated features such as the internal reference and lead-off detection?
Yes. Both the ADS1294IPAG and ADS1296IPAGR integrate a low-noise programmable gain amplifier, an internal reference, oscillator, and lead-off detection circuitry for ECG/EEG applications, differing only in the number of input channels and packaging format.