Part A
ADS1220IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6260 PCS
- Package
- TSSOP-16
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1220IPWR and ADS1282HIPW are not drop-in replacements for one another. Although both are Texas Instruments precision delta-sigma analog-to-digital converters, they differ fundamentally in resolution, input architecture, package footprint, and target application class, so a direct substitution is not feasible without a full redesign and validation cycle.
Different resolution and dynamic range
Different input architecture
Different package footprint
Different application class
Parts at a glance
Part B
ADS1282HIPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 6044 PCS
- Package
- TSSOP-28
- 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 | ADS1220IPWR | ADS1282HIPW | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 31 | Higher resolution provides finer measurement granularity and lower quantization noise, which is critical for precision sensing applications. |
| Number of input channels | 4 (2 differential / 4 single-ended) | 2 (1 differential) | Channel count determines how many signals can be measured without external multiplexing, affecting system complexity and board space. |
| Maximum sample rate | 2 kSPS | 4 kSPS | Sample rate sets the bandwidth of signals that can be captured; higher rates suit faster-changing or higher-frequency inputs. |
| Interface type | SPI | SPI | The digital interface must match the host controller; both use SPI, easing drop-in compatibility at the system level. |
| Supply voltage (analog) | 2.3 V to 5.5 V | 4.75 V to 5.25 V (analog), 2.7 V to 3.6 V (digital) | Supply requirements determine power architecture compatibility; the wider range of one device allows lower-voltage operation. |
| PGA / gain stage | Integrated PGA (gain 1 to 128) | Integrated PGA (gain 1 to 64) | An integrated PGA allows direct amplification of small sensor signals, reducing external components and improving noise performance. |
| Package | TSSOP-16 | TSSOP-28 | Package footprint and pin count affect PCB layout and cannot be substituted without board redesign. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | Temperature range determines suitability for harsh or industrial environments and affects reliability margins. |
| Input type | Differential / single-ended | Differential | Single-ended capability allows simpler sensor connections, while differential-only inputs offer better common-mode rejection. |
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 | ADS1220IPWR | ADS1282HIPW |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 24 | - |
| Sampling Rate(Per Second) | 2k | - |
| Number of Inputs | 2, 4 | - |
| Input Type | Differential, Single Ended | - |
| Data Interface | SPI | - |
| Configuration | MUX-PGA-ADC | - |
| Number of A/D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External, Internal, Supply | - |
| Voltage - Supply, Analog | 2.3V ~ 5.5V, ±2.5 | - |
| Voltage - Supply, Digital | 2.3V ~ 5.5V | - |
| Features | PGA, Temperature Sensor | - |
| Operating Temperature | -40°C ~ 125°C | - |
Frequently asked questions
What are the primary differences between the ADS1220IPWR and ADS1282HIPW?
The ADS1220IPWR is a 24-bit, 4-channel, 2-kSPS delta-sigma ADC with an integrated PGA, VREF, and SPI interface in a TSSOP-16 package. The ADS1282HIPW is a 31-bit, 2-channel, 4-kSPS delta-sigma ADC with an integrated PGA and ADC, designed for seismic and high-resolution measurement applications, housed in a TSSOP-28 package. The ADS1282HIPW offers higher resolution and a wider operating temperature range (-40°C to +125°C) compared to the ADS1220IPWR (-40°C to +125°C for the IPWR grade).
Are the ADS1220IPWR and ADS1282HIPW pin-to-pin compatible?
No. The ADS1220IPWR uses a 16-pin TSSOP package, while the ADS1282HIPW uses a 28-pin TSSOP package. The pin counts, pin functions, and package footprints differ, so they are not drop-in replacements for each other.
What are the resolution and data rate specifications for each device?
The ADS1220IPWR provides 24-bit resolution with programmable data rates up to 2 kSPS. The ADS1282HIPW provides 31-bit resolution with programmable data rates up to 4 kSPS. The ADS1282HIPW is optimized for higher-resolution, lower-noise measurements, while the ADS1220IPWR targets general-purpose precision sensor applications.
Do both devices include an integrated programmable gain amplifier (PGA)?
Yes. Both the ADS1220IPWR and ADS1282HIPW integrate a programmable gain amplifier. The ADS1220IPWR PGA supports gains from 1 to 128 V/V. The ADS1282HIPW also includes a PGA with selectable gains, enabling direct interfacing with low-level sensors such as geophones and seismometers.
What communication interfaces do the ADS1220IPWR and ADS1282HIPW support?
Both devices use an SPI-compatible serial interface for configuration and data readout. The ADS1220IPWR supports SPI modes 1 and 3. The ADS1282HIPW also uses SPI for register access and conversion data retrieval, allowing direct connection to most microcontrollers and DSPs.
What are the typical applications for each device?
The ADS1220IPWR is typically used in precision sensor measurement, temperature and pressure sensing, portable instrumentation, and industrial process control. The ADS1282HIPW is designed for high-resolution seismic data acquisition, energy exploration, and precision vibration monitoring where 31-bit resolution and low noise are critical.
What are the supply voltage requirements for the ADS1220IPWR and ADS1282HIPW?
The ADS1220IPWR operates from an analog supply (AVDD) of 2.3 V to 5.5 V and a digital supply (DVDD) of 2.3 V to 5.5 V. The ADS1282HIPW operates from an analog supply of 4.75 V to 5.25 V (bipolar ±2.5 V supported) and a digital supply of 1.8 V to 3.3 V. Designers must verify supply rails against the respective datasheets before substitution.
Can the ADS1220IPWR be used as a replacement for the ADS1282HIPW in seismic acquisition designs?
No, not directly. The ADS1282HIPW provides 31-bit resolution, a 4-kSPS maximum data rate, and specifications tailored for seismic and high-resolution vibration measurement, while the ADS1220IPWR provides 24-bit resolution and up to 2 kSPS. The resolution, noise performance, package, and supply requirements differ, so a redesign and validation against the ADS1282HIPW datasheet would be required.