Part A
ADS1230IPW
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 2859 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1230IPW and ADS1271IPWG4 are both 24-bit delta-sigma ADCs, but they differ fundamentally in resolution architecture, sample rate, channel count, and package footprint. The ADS1230IPW is a low-speed, single-channel, 20-SPS device in a TSSOP-16 package, while the ADS1271IPWG4 is a high-speed, single-channel, 105-kSPS device in a TSSOP-16 package with a different pinout and supply scheme. Because the sample rate, digital interface timing, and analog front-end requirements are not interchangeable, the ADS1271IPWG4 cannot directly replace the ADS1230IPW without redesign of the surrounding circuitry and firmware.
Different sample rate
Different digital interface
Different supply scheme
Different pinout
Parts at a glance
Part B
ADS1271IPWG4
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 3928 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (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 | ADS1230IPW | ADS1271IPWG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 20 | 24 | Higher resolution provides finer measurement granularity and lower quantization noise, which is critical for precision sensor and weigh-scale applications. |
| Architecture | Delta-Sigma | Delta-Sigma | Both use delta-sigma conversion, but the specific modulator design affects noise shaping, filter characteristics, and achievable effective resolution. |
| Sample Rate (max) | 80 SPS | 105 kSPS | The maximum output data rate determines the bandwidth of signals that can be captured; the ADS1271 supports much faster dynamic measurements. |
| Number of Input Channels | 1 (differential) | 1 (differential) | Both are single-channel differential devices, so channel count is not a differentiator, but differential input supports rejection of common-mode noise. |
| Input Type | Differential | Differential | Differential inputs improve noise immunity and allow small signals to be measured accurately in electrically noisy environments. |
| Supply Voltage (analog) | 2.7 V to 5.3 V | 4.75 V to 5.25 V | The wider analog supply range of the ADS1230 allows operation from lower-voltage rails, while the ADS1271 requires a regulated 5 V analog supply. |
| Interface | Serial (SPI-compatible) | Serial (SPI-compatible) | Both use a serial interface for connection to microcontrollers, but timing and protocol details differ and must be matched to the host. |
| Package | 16-TSSOP | 16-TSSOP | Identical package and pin count simplify PCB footprint reuse, though pin functions and external component requirements may differ. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +105°C | The wider temperature range of the ADS1271 supports use in harsher industrial environments with less thermal derating. |
| Typical Application Focus | Weigh scales, strain gauges, low-speed precision sensing | Industrial measurement, vibration, fast data acquisition | The intended application focus indicates whether the device is optimized for low-speed high-resolution sensing or higher-speed dynamic signal acquisition. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1230IPW | ADS1271IPWG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 20 | 24 |
| Sampling Rate(Per Second) | 80 | 105k |
| Number of Inputs | 1 | 1 |
| Input Type | Differential, Single Ended | Differential |
| Data Interface | SPI | SPI |
| Configuration | PGA-ADC | ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.3V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.3V | 1.65V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 105°C |
| Features | PGA | - |
Frequently asked questions
What are the primary differences between the ADS1230IPW and ADS1271IPWG4?
The ADS1230IPW is a 20-bit delta-sigma ADC optimized for low-speed, high-resolution bridge sensor applications with a maximum data rate of 80 SPS. The ADS1271IPWG4 is a 24-bit delta-sigma ADC supporting higher data rates up to 105 kSPS with wider signal bandwidth. They differ in resolution, data rate, architecture, and target application space.
Are the ADS1230IPW and ADS1271IPWG4 pin-compatible?
No. The ADS1230IPW is offered in a 16-pin TSSOP package, while the ADS1271IPWG4 is offered in a 24-pin TSSOP package. Pin count, pin functions, and PCB land patterns differ, so they are not drop-in replacements.
What are the maximum data rates of these two ADCs?
The ADS1230IPW supports data rates of 10 SPS and 80 SPS (selectable). The ADS1271IPWG4 supports data rates up to 105 kSPS in high-speed mode, 52 kSPS in high-resolution mode, and 10.5 kSPS in low-power mode.
How do the resolutions of the ADS1230IPW and ADS1271IPWG4 compare?
The ADS1230IPW provides 20-bit resolution, while the ADS1271IPWG4 provides 24-bit resolution. The higher resolution of the ADS1271IPWG4 supports finer measurement granularity, though effective resolution depends on data rate, gain, and noise performance in the target design.
What are the typical applications for each device?
The ADS1230IPW is typically used in weigh scales, strain gauge and bridge sensor measurements, and other low-speed precision sensing applications. The ADS1271IPWG4 is suited to higher-bandwidth precision applications such as industrial measurement, vibration analysis, medical instrumentation, and data acquisition systems requiring faster sampling.
Do both devices support the same digital interface?
No. The ADS1230IPW uses a simple two-wire serial interface for data output and clock control. The ADS1271IPWG4 provides a SPI-compatible serial interface with additional control and status signals, supporting more flexible system integration at higher data rates.
Can the ADS1230IPW be replaced by the ADS1271IPWG4 in an existing design?
Not directly. The devices differ in package, pinout, resolution, data rate, interface, and power requirements. A replacement requires PCB redesign, firmware or interface changes, and validation against the manufacturer datasheets for both devices.