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 ADS1198CPAG and ADS1198CPAGR are functionally identical eight-channel, 16-bit delta-sigma ECG front-end devices from Texas Instruments; the only distinction is the tape-and-reel packaging suffix on the CPAGR variant. Both share the same TQFP-64 package, pinout, electrical specifications, and operating range, making them interchangeable for design and production purposes.
Package Type
High match
Channel Count
High match
Resolution
High match
Operating Temperature Range
High match
Parts at a glance
Part B
ADS1198CPAGR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6691 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 | ADS1198CPAGR | Why it matters |
|---|---|---|---|
| Number of Channels | 8 | 8 | Determines how many simultaneous biopotential inputs the AFE can digitize; must match the application's channel count. |
| Resolution | 16 bit | 16 bit | Sets the ADC quantization precision, directly affecting signal fidelity and dynamic range for ECG/EEG measurements. |
| Data Rate (Max) | 8 kSPS | 8 kSPS | Defines the maximum sampling throughput; must satisfy the bandwidth requirements of the target biopotential signal. |
| Supply Voltage (Analog/Digital) | 2.7 V to 5.25 V (unipolar) / 1.8 V to 3.6 V (DVDD) | 2.7 V to 5.25 V (unipolar) / 1.8 V to 3.6 V (DVDD) | Determines power rail compatibility with the host system and overall power budget. |
| Interface Type | SPI (serial) | SPI (serial) | Must match the host microcontroller's available communication peripheral for correct data transfer. |
| Package / Case | 64-TQFP | 64-TQFP | Footprint and pinout must be compatible with the PCB layout for drop-in substitution. |
| Operating Temperature Range | 0°C to 70°C | 0°C to 70°C | Confirms the device is rated for the intended ambient environment of the end application. |
| Packaging / Reel | Tray | Tape & Reel | Affects manufacturing handling and pick-and-place assembly; the R suffix denotes reel packaging for automated production. |
| Ordering Quantity (Standard) | 160 per tray | 2000 per reel | Impacts procurement lot size and inventory planning for production runs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1198CPAG | ADS1198CPAGR |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Number of Channels | 8 | 8 |
| Power (Watts) | 8.2 mW | 8.2 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 difference between ADS1198CPAG and ADS1198CPAGR?
The ADS1198CPAG and ADS1198CPAGR are the same device: an 8-channel, 16-bit, low-power electrocardiogram (ECG) analog front-end from Texas Instruments in a 64-pin TQFP package. The suffix difference is packaging form: "G" designates a tray (bulk) shipment, while "GR" designates tape-and-reel shipment. Electrical performance and die are identical.
Are ADS1198CPAG and ADS1198CPAGR electrically and functionally interchangeable?
Yes. Both orderable part numbers share the same datasheet, die, package (64-pin TQFP, 10 mm × 10 mm body), pinout, and specified electrical characteristics. The only difference is the shipping medium (tray vs. tape-and-reel), so they are interchangeable in the target design provided the assembly process supports the respective packaging format.
Which package and pin count do ADS1198CPAG and ADS1198CPAGR use?
Both devices are supplied in a 64-pin TQFP (Thin Quad Flat Package) with a 10 mm × 10 mm body and 0.5 mm lead pitch, per the Texas Instruments ADS1198 datasheet. The package code is PAG for both orderable part numbers.
What are the key performance specifications of the ADS1198?
The ADS1198 is an 8-channel, 16-bit delta-sigma ADC front-end with programmable gain amplifiers, integrated input multiplexer, and lead-off detection. It supports data rates up to 8 kSPS per channel, operates from an analog supply of 2.7 V to 5.25 V and a digital supply of 1.7 V to 3.6 V, and is specified for low-power ECG and biopotential measurement applications per the TI datasheet.
Why would a designer choose the tape-and-reel version (ADS1198CPAGR) over the tray version (ADS1198CPAG)?
The tape-and-reel version (GR suffix) is intended for automated high-volume SMT assembly lines that require reel-fed pick-and-place equipment. The tray version (G suffix) is typically used for low-volume prototyping, manual assembly, or where tray-fed handlers are used. Selection depends on the production line's feeder and handling requirements, not on device performance.
Do ADS1198CPAG and ADS1198CPAGR have the same operating temperature range and qualification status?
Yes. Both orderable part numbers are specified over the same industrial temperature range (typically −40 °C to +85 °C) and share the same qualification and reliability data because they are the same die and package. Buyers should confirm the exact temperature grade and qualification status against the current TI datasheet and product page for the specific orderable part number.
Can ADS1198CPAG and ADS1198CPAGR be mixed on the same PCB assembly?
Yes. Because both part numbers are the same device in the same 64-pin TQFP package with identical pinout and electrical specifications, they can be used interchangeably on the same PCB. The choice between them affects only the SMT feeder and inventory handling, not the board design or layout.