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 ADS1147IPWR and ADS1148IPW are functionally compatible 16-bit delta-sigma ADCs sharing the same TSSOP-20 footprint, supply range, and SPI interface, with the ADS1148IPW offering two additional differential input channels. The ADS1147IPWR can serve as a functional substitute for the ADS1148IPW where the extra input channels are not required, but the reduced channel count must be validated against the application's input requirements before substitution.
Resolution and ADC Architecture
High match
Package and Pin Footprint
High match
Input Channel Count
Validation required
Supply Voltage and Interface
High match
Parts at a glance
Part B
ADS1147IPWR
德州儀器
- Lifecycle
- Active
- Stock
- 1435 件
- Package
- TSSOP-20
- 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 | ADS1147IPWR | 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 directly affects how many sensors can be connected without external multiplexing. |
| Package | TSSOP-20 (PW) | TSSOP-28 (PW) | Different package pin counts and footprints mean the two parts are not drop-in compatible on the same PCB layout. |
| Pin count | 20 | 28 | Pin count difference confirms the devices require different footprints and cannot be interchanged without a board redesign. |
| Supply voltage (AVDD) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Identical analog supply range allows both to operate from the same system rails. |
| Interface | SPI | SPI | Same serial interface simplifies firmware reuse when migrating between the two parts. |
| Internal PGA | Yes (gain 1 to 128) | Yes (gain 1 to 128) | Both integrate a programmable gain amplifier, enabling direct connection of low-level sensor signals without external amplification. |
| Internal reference | Yes | Yes | On-chip reference reduces external component count and board space in both devices. |
| Operating temperature range | -40 °C to +105 °C | -40 °C to +105 °C | Identical temperature ratings mean both suit the same industrial environments. |
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 | ADS1147IPWR |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | ADS1148 | - |
| Number of Bits | 16 | 16 |
| Sampling Rate (Per Second) | 2k | - |
| Number of Inputs | 4, 7 | 2, 3 |
| 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, Internal |
| 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 ADS1147IPWR and ADS1148IPW?
Both are 16-bit delta-sigma ADCs from Texas Instruments with integrated PGA and reference. The ADS1147IPWR is supplied in a TSSOP-20 package (PW suffix, tape and reel), while the ADS1148IPW is supplied in a TSSOP-28 package (PW suffix, tube). The ADS1148 provides additional input channels and GPIO compared to the ADS1147 due to its larger pin count.
Are the ADS1147IPWR and ADS1148IPW pin-to-pin compatible?
No. The ADS1147IPWR uses a 20-pin TSSOP package and the ADS1148IPW uses a 28-pin TSSOP package, so they have different pin counts and PCB land patterns. They cannot be used as direct drop-in replacements without a board redesign.
Do both devices share the same resolution and data rate characteristics?
Yes. Both the ADS1147 and ADS1148 are 16-bit delta-sigma ADCs with programmable data rates up to 2 kSPS and a programmable gain amplifier, per Texas Instruments datasheet specifications. The core ADC performance is common across the family; the primary differences are package, channel count, and GPIO resources.
What supply voltage range do the ADS1147IPWR and ADS1148IPW require?
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, as specified in the Texas Instruments datasheet. They also support an internal oscillator and internal reference, reducing external component count.
Which package options are available for each device?
The ADS1147IPWR is offered in a 20-pin TSSOP (PW) package in tape-and-reel form (R suffix). The ADS1148IPW is offered in a 28-pin TSSOP (PW) package in tube form. Both are specified over the industrial temperature range of -40°C to +105°C per the manufacturer datasheet.
Can the ADS1148IPW be used in place of the ADS1147IPWR in an existing design?
Not without PCB modification. Because the ADS1148IPW has 28 pins versus 20 pins on the ADS1147IPWR, the footprint and pin functions differ. A replacement requires verifying pin assignments, land pattern, and channel/GPIO usage against the respective Texas Instruments datasheets.
Do both parts support the same communication interface?
Yes. Both the ADS1147 and ADS1148 use an SPI-compatible serial interface for configuration and data readout, as documented in the Texas Instruments datasheet. This allows either device to interface with the same host microcontroller SPI peripheral, subject to package and pinout differences.