Part A
ADS1246IPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 6549 PCS
- Package
- TSSOP-16
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS1219IPWR and ADS1246IPW are both 24-bit delta-sigma ADCs in a TSSOP-16 package, but they differ in channel count, interface type, and input architecture. The ADS1219IPWR offers a 4-channel multiplexed input with an I2C interface, while the ADS1246IPW provides a single-channel differential input with an SPI interface. Designers must validate channel requirements, digital interface compatibility, and input configuration before substituting one for the other in a given application.
Channel Count
Validation required
Digital Interface
Not compatible
Resolution
High match
Package Type
High match
Parts at a glance
Part B
ADS1219IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 5923 PCS
- Package
- TSSOP-16
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS1219IPWR | ADS1246IPW | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so resolution alone does not differentiate them for substitutability. |
| Number of input channels | 4 (single-ended) / 2 (differential) | 1 (differential) | Channel count determines how many signals can be measured; the ADS1219 supports multi-channel systems while the ADS1246 is single-channel. |
| Input type | Differential or single-ended (multiplexed) | Differential only | Single-ended capability affects sensor interfacing flexibility and board layout. |
| Maximum data rate (SPS) | 1000 | 2000 | Data rate affects achievable sampling bandwidth and noise trade-off; the ADS1246 offers higher throughput. |
| Interface | I2C | SPI | The digital interface must match the host controller; I2C vs SPI is a key incompatibility for drop-in substitution. |
| Programmable gain amplifier (PGA) | Yes (gain 1 to 128) | Yes (gain 1 to 128) | PGA allows amplification of small sensor signals; both provide similar gain ranges. |
| Supply voltage (analog) | 2.7 V to 5.5 V | 2.7 V to 5.25 V | Supply range must be compatible with the system rail; slight differences affect margin at the upper end. |
| Package | TSSOP-16 | TSSOP-16 | Package footprint and pinout determine PCB compatibility; identical package eases layout but pinout must be verified. |
| Internal reference | Yes | Yes | An internal reference reduces external component count and simplifies precision measurement design. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +125 °C | Temperature range must cover the application environment; both meet industrial-grade requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1246IPW | ADS1219IPWR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 2k | 1k |
| Number of Inputs | 1 | 4 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | I²C |
| Configuration | MUX-PGA-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.3V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.3V ~ 5.5V |
| Features | PGA, Temperature Sensor | PGA |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 125°C |
| Ratio - S / H: ADC | - | 0:1 |
Frequently asked questions
What are the primary functional differences between the ADS1219IPWR and ADS1246IPW?
The ADS1219IPWR is a 4-channel, 24-bit delta-sigma ADC with an I2C interface, while the ADS1246IPW is a single-channel, 24-bit delta-sigma ADC with an SPI interface. The ADS1219IPWR integrates a programmable gain amplifier (PGA) and supports single-ended or differential inputs across its four channels, whereas the ADS1246IPW offers a single differential input with a PGA and includes a low-noise, low-drift internal oscillator for sensor measurement applications.
Are the ADS1219IPWR and ADS1246IPW pin-to-pin compatible?
No. The ADS1219IPWR is supplied in a 16-pin TSSOP package, and the ADS1246IPW is supplied in a 16-pin TSSOP package, but their pin functions and assignments differ due to different interfaces (I2C vs SPI) and channel configurations. They are not direct pin-to-pin replacements.
What are the maximum sampling rates of the ADS1219IPWR and ADS1246IPW?
The ADS1219IPWR supports programmable data rates up to 1 kSPS in normal mode and up to 2 kSPS in turbo mode. The ADS1246IPW supports programmable data rates from 5 SPS to 2 kSPS. Both devices are intended for precision, low-speed sensor measurement rather than high-speed acquisition.
Which device is better suited for multi-channel sensor systems?
The ADS1219IPWR is better suited for multi-channel systems because it provides four input channels (configurable as single-ended or differential) through a single I2C interface, reducing the need for external multiplexing. The ADS1246IPW provides only one differential input channel, so multi-channel systems would require external multiplexing or multiple ADC devices.
How do the interface requirements of the ADS1219IPWR and ADS1246IPW differ?
The ADS1219IPWR uses an I2C interface (up to 400 kHz fast mode), requiring only two signal lines (SDA and SCL) plus address selection. The ADS1246IPW uses an SPI interface (up to 4 MHz), requiring four signal lines (SCLK, DIN, DOUT, CS). System-level bus architecture and microcontroller peripheral availability should guide the selection.
Do both devices support internal temperature sensing or reference options?
The ADS1219IPWR includes an internal 2.048 V reference and an internal temperature sensor. The ADS1246IPW includes an internal 2.048 V reference and supports external reference inputs, but its internal temperature sensor availability should be confirmed against the specific datasheet revision. Designers should verify reference and sensor features against the latest official manufacturer datasheet before finalizing the design.
What are the supply voltage and power consumption considerations for these ADCs?
Both the ADS1219IPWR and ADS1246IPW operate from an analog supply of 2.7 V to 5.5 V and a digital supply of 2.7 V to 5.5 V. The ADS1219IPWR typically consumes approximately 0.6 mW in normal mode, while the ADS1246IPW typically consumes approximately 2.3 mW. Exact power consumption depends on data rate, PGA gain, and configuration, so the datasheet electrical characteristics tables should be consulted for the target operating conditions.
Can the ADS1219IPWR and ADS1246IPW be used interchangeably in an existing design?
No. They differ in interface protocol (I2C vs SPI), channel count (4 vs 1), package pinout, and register map. Interchanging them would require PCB redesign, firmware changes, and revalidation of the analog front end. They should not be treated as drop-in substitutes.