Part A
ADS1147IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 1435 PCS
- Package
- TSSOP-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS1146IPWR and ADS1147IPWR share the same TSSOP-20 footprint, 16-bit delta-sigma architecture, SPI interface, and industrial temperature range, making them strong functional replacement candidates. The ADS1147IPWR adds an integrated excitation current source and additional GPIO, so designers must confirm whether the target application requires these extra features before substituting the ADS1146IPWR in an existing ADS1147IPWR socket.
Package Type
High match
Resolution and Architecture
High match
Interface Type
High match
Integrated Excitation Current Source
Validation required
Parts at a glance
Part B
ADS1146IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3513 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 | ADS1146IPWR | ADS1147IPWR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit delta-sigma ADCs, so resolution is identical and not a differentiator for substitutability. |
| Number of input channels | 1 differential (2 single-ended) | 2 differential (4 single-ended) | The ADS1147 provides twice the input channels, which is critical if the application needs to measure multiple sensors without an external multiplexer. |
| On-chip PGA | Yes (gains 1 to 128) | Yes (gains 1 to 128) | Both integrate a programmable gain amplifier, enabling direct connection of low-level sensor signals; identical here. |
| Internal reference | Yes (2.048 V) | Yes (2.048 V) | An internal voltage reference simplifies design and improves accuracy; both parts share the same reference, so no difference. |
| Data rate (SPS) | 5 to 2000 | 5 to 2000 | Programmable data rate affects noise versus speed trade-off; identical ranges mean equivalent throughput capability. |
| Supply voltage (AVDD) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Supply range determines compatibility with system rails; both support the same range, so power design is interchangeable. |
| Package | TSSOP-16 | TSSOP-20 | Different pin counts and footprints mean the two parts are not drop-in PCB replacements; layout must accommodate the larger 20-pin package for the ADS1147. |
| Interface | SPI | SPI | Both use a standard SPI serial interface, so firmware and host communication are compatible. |
| Operating temperature range | -40 °C to +105 °C | -40 °C to +105 °C | Identical industrial temperature ratings mean both suit the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1147IPWR | ADS1146IPWR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 2k | 2k |
| Number of Inputs | 2, 3 | 1 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What is the primary functional difference between the ADS1146IPWR and ADS1147IPWR?
The ADS1146IPWR is a 16-bit, single-channel delta-sigma ADC, while the ADS1147IPWR is a 16-bit, four-channel (two differential or four single-ended) delta-sigma ADC. Both integrate a PGA, but the ADS1147 provides additional input channels and a multiplexer for multi-signal acquisition.
Are the ADS1146IPWR and ADS1147IPWR pin-compatible?
No. The ADS1146IPWR is offered in a TSSOP-16 package, whereas the ADS1147IPWR is offered in a TSSOP-20 package. The different pin counts and pin functions prevent direct PCB drop-in replacement without layout changes.
Do both devices share the same resolution and data rate specifications?
Yes. Both are 16-bit delta-sigma ADCs supporting programmable data rates from 5 SPS to 2 kSPS, with a programmable gain amplifier (PGA) providing gains from 1 to 128. Both operate from a single 2.7 V to 5.25 V analog supply.
Can the ADS1147IPWR be used as a replacement for the ADS1146IPWR in an existing design?
Not as a direct drop-in replacement. Although both share the same ADC core and PGA architecture, the ADS1147IPWR has a different package (TSSOP-20 vs TSSOP-16) and additional input multiplexer pins. A redesign of the PCB layout and firmware configuration is required.
What input configurations does the ADS1147IPWR support that the ADS1146IPWR does not?
The ADS1147IPWR includes an input multiplexer supporting two differential or four single-ended inputs, allowing multiple sensor channels to be sequenced. The ADS1146IPWR provides only a single differential input channel.
Do both parts support the same communication interface?
Yes. Both the ADS1146IPWR and ADS1147IPWR use an SPI-compatible serial interface for configuration and data readout, supporting the same register map structure for the shared ADC core functions.
Are both devices specified over the same operating temperature range?
Yes. Both the ADS1146IPWR and ADS1147IPWR are specified for operation over the industrial temperature range of -40°C to +125°C, as documented in the respective Texas Instruments datasheets.