Part A
ADS1146IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3513 PCS
- Package
- TSSOP-16
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1119IPWR and ADS1146IPWR are not drop-in replacements for one another. Although both are 16-bit delta-sigma ADCs in TSSOP-16 packages, they differ fundamentally in resolution architecture, input configuration, interface protocol, and reference scheme, so a direct board-level substitution is not feasible without redesign.
Different input architecture
Different digital interface
Different reference scheme
Different data rate profile
Parts at a glance
Part B
ADS1119IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6293 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 | ADS1119IPWR | ADS1146IPWR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit ADCs, so resolution is equivalent for substitutability. |
| Number of input channels | 4 (differential/7 single-ended) | 1 differential (2 single-ended) | Channel count determines how many signals can be measured; the ADS1119 supports more inputs. |
| Sampling rate (max SPS) | 1000 | 2000 | Higher sampling rate enables faster signal acquisition; the ADS1146 is roughly twice as fast. |
| Interface | I2C | SPI | The digital interface must match the host MCU; I2C vs SPI are not directly interchangeable. |
| PGA / gain stages | Programmable gain 1 to 16 | Programmable gain 1 to 128 | Higher gain range allows smaller signals to be amplified; the ADS1146 supports finer low-level measurements. |
| Supply voltage (analog) | 2.3 V to 5.5 V | 2.7 V to 5.25 V | Supply range affects compatibility with system rails; the ADS1119 tolerates slightly lower voltages. |
| Package | TSSOP-16 | TSSOP-16 | Same package footprint allows drop-in PCB compatibility. |
| Internal reference | Yes (2.048 V) | Yes (2.048 V) | An internal reference simplifies design and improves accuracy without external components. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure equivalent environmental robustness. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1146IPWR | ADS1119IPWR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| 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 | 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 | 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 ADS1119IPWR and the ADS1146IPWR?
The ADS1119IPWR is a 16-bit, 4-channel, delta-sigma analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA), internal oscillator, and I2C interface, housed in a TSSOP-16 package. The ADS1146IPWR is a 16-bit, single-channel, delta-sigma ADC with a PGA and SPI interface, housed in a TSSOP-16 package. The ADS1119 supports four single-ended or two differential inputs via an input multiplexer, while the ADS1146 provides a single differential input channel.
Are the ADS1119IPWR and ADS1146IPWR pin-to-pin compatible?
No. Although both devices are offered in a TSSOP-16 package, their pin functions and internal architectures differ. The ADS1119IPWR uses an I2C interface and includes a multiplexer for multiple input channels, while the ADS1146IPWR uses an SPI interface with a single differential input. Pin assignments and functions are not interchangeable, so a direct PCB drop-in replacement is not possible without design changes.
What are the differences in communication interfaces between the two ADCs?
The ADS1119IPWR provides an I2C-compatible interface supporting standard, fast, and fast-plus modes, with a programmable I2C address. The ADS1146IPWR provides an SPI-compatible interface with a 4-wire configuration (SCLK, DIN, DOUT, CS). System designers must account for these different host interface requirements when selecting between the two devices.
How do the input channel configurations of the ADS1119IPWR and ADS1146IPWR compare?
The ADS1119IPWR features an input multiplexer that supports four single-ended inputs or two differential input pairs, selectable via register configuration. The ADS1146IPWR provides a single differential input channel (two analog inputs, AIN0 and AIN1). Applications requiring multiple sensor channels may favor the ADS1119IPWR, while single-channel precision measurements may be served by the ADS1146IPWR.
Do both devices include an internal oscillator and reference?
The ADS1119IPWR includes an internal oscillator and supports an internal reference as well as external reference options. The ADS1146IPWR also includes an internal oscillator and an internal reference, with support for external reference inputs. Designers should consult the respective datasheets for the exact reference voltage values, drift specifications, and configuration options, as these parameters differ between the two devices.
What are the supply voltage and package considerations for these two ADCs?
Both the ADS1119IPWR and ADS1146IPWR are specified for analog and digital supply voltages in the low-voltage range typical of precision sensor applications and are both offered in a TSSOP-16 package. However, exact supply voltage ranges, current consumption, and thermal characteristics differ between the devices. Designers must verify the specific datasheet limits for each part before finalizing power supply and thermal designs.
Which device is better suited for multi-channel sensor systems?
The ADS1119IPWR is generally better suited for multi-channel sensor systems because its integrated input multiplexer supports four single-ended or two differential inputs, allowing multiple sensors to be measured by a single ADC. The ADS1146IPWR, with its single differential input channel, is more appropriate for single-sensor or single-channel precision measurement applications.
Can the ADS1119IPWR and ADS1146IPWR be used interchangeably in an existing design?
No. The two devices differ in interface type (I2C versus SPI), input channel count and multiplexer configuration, and pin functions, despite sharing a TSSOP-16 package. Interchanging them would require PCB layout changes, firmware or driver modifications, and revalidation of the analog front-end against the target specifications. A direct substitution is not supported.