Part A
ADS1148IPW
德州儀器
- Lifecycle
- Active
- Stock
- 4234 件
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS1146IPWR and ADS1148IPW share the same TSSOP-16 footprint, 16-bit delta-sigma architecture, and SPI interface, making the ADS1148IPW a viable functional upgrade path when additional input channels and an on-chip PGA are required. However, the ADS1148IPW draws higher supply current and offers a narrower programmable gain range, so power budget and signal-chain gain requirements must be validated before substitution.
Package Type
High match
Resolution and Architecture
High match
Input Channel Count
Validation required
Supply Current
Not compatible
Parts at a glance
Part B
ADS1146IPWR
德州儀器
- Lifecycle
- Active
- Stock
- 3513 件
- Package
- TSSOP-16
- Series
- 資料獲取-模數轉換器（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 | ADS1148IPW | 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 | 4 single-ended / 2 differential | 8 single-ended / 4 differential | The ADS1148 provides twice the input channel count, which is critical if the application needs to measure more sensors or signals. |
| Programmable gain amplifier (PGA) ranges | 1 to 128 V/V | 1 to 128 V/V | Identical PGA gain options mean both can handle the same small-signal sensor inputs without external amplification. |
| Data rate (SPS) | 5 to 2000 SPS | 5 to 2000 SPS | Same programmable output data rates allow equivalent throughput and noise trade-off selection. |
| Supply voltage (analog) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Identical analog supply range ensures both parts work in the same low-voltage system rails. |
| Interface | SPI | SPI | Both use SPI, so the same microcontroller interface and firmware protocol can be reused. |
| Package | TSSOP-16 (PW) | TSSOP-28 (PW) | Different package pin counts and footprints mean the PCB layout must be redesigned; they are not drop-in replacements. |
| Internal reference | Yes (2.048 V) | Yes (2.048 V) | Both include an on-chip reference, reducing external component count and simplifying precision measurement design. |
| Operating temperature range | -40 °C to +105 °C | -40 °C to +105 °C | Identical industrial temperature range supports the same harsh-environment applications. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1148IPW | ADS1146IPWR |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | ADS1148 | - |
| Number of Bits | 16 | 16 |
| Sampling Rate (Per Second) | 2k | - |
| Number of Inputs | 4, 7 | 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 | - |
| 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 |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
| Sampling Rate(Per Second) | - | 2k |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What are the key differences between the ADS1146IPWR and ADS1148IPW?
The ADS1146IPWR is a 16-bit, single-channel delta-sigma ADC in a TSSOP-16 package, while the ADS1148IPW is a 16-bit, 8-channel (4 differential / 8 single-ended) delta-sigma ADC in a TSSOP-28 package. The ADS1148IPW integrates a programmable gain amplifier, an input multiplexer for multiple channels, and a sensor excitation current source, whereas the ADS1146IPWR provides a single differential input channel with PGA but no input multiplexer.
Are the ADS1146IPWR and ADS1148IPW pin-to-pin compatible?
No. The ADS1146IPWR uses a 16-pin TSSOP (PW) package, and the ADS1148IPW uses a 28-pin TSSOP (PW) package. The different pin counts and pin functions mean they are not drop-in replacements and require different PCB footprints.
Do both devices share the same resolution and data rate capabilities?
Yes. Both the ADS1146IPWR and ADS1148IPW are 16-bit delta-sigma ADCs offering programmable data rates from 5 SPS to 2 kSPS, with simultaneous 50 Hz and 60 Hz rejection modes. Both include a low-noise programmable gain amplifier supporting gains from 1 to 128.
Which device should be selected for multi-sensor applications?
The ADS1148IPW is the appropriate choice for multi-sensor designs because it provides an 8-channel input multiplexer (4 differential or 8 single-ended inputs) plus two matched programmable excitation current sources for RTD and thermistor measurements. The ADS1146IPWR offers only a single differential input channel and is suited to single-sensor designs.
Do the ADS1146IPWR and ADS1148IPW support the same supply voltage range?
Yes. Both devices operate from an analog supply (AVDD) of 2.7 V to 5.25 V and a digital supply (DVDD) of 2.7 V to 5.25 V, and both support an external reference voltage range of 0.5 V to AVDD.
Are both parts available in the same operating temperature range?
Yes. Both the ADS1146IPWR and ADS1148IPW are specified over the industrial temperature range of -40°C to +125°C, as indicated by the "I" grade suffix in their part numbers.
Can the ADS1146IPWR be used as a substitute for the ADS1148IPW in an existing design?
Not directly. Although both are 16-bit delta-sigma ADCs with similar core performance, the ADS1146IPWR has fewer pins, a single input channel, and no input multiplexer or excitation current sources. Substitution requires PCB redesign and firmware changes to accommodate the different package, pinout, and register map.