Part A
ADS1220IPWR
德州儀器
- Lifecycle
- Active
- Stock
- 6260 件
- Package
- TSSOP-16
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS1219IPWR and ADS1220IPWR share the same TSSOP-16 package, 2-wire I2C-compatible interface family, and precision delta-sigma architecture, making the ADS1219IPWR a viable functional replacement candidate for the ADS1220IPWR in low-channel-count precision sensing applications. However, the ADS1220IPWR offers a wider input multiplexer, higher programmable gain range, and integrated PGA features that the ADS1219IPWR does not match, so validation against the target application's channel count, gain requirements, and data rate is required before substitution.
Package Type
High match
Resolution
High match
Input Channel Count
Validation required
Programmable Gain Amplifier
Not compatible
Parts at a glance
Part B
ADS1219IPWR
德州儀器
- Lifecycle
- Active
- Stock
- 5923 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 | ADS1219IPWR | ADS1220IPWR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so resolution is equivalent for high-precision sensing applications. |
| Number of input channels | 4 single-ended / 2 differential | 4 single-ended / 2 differential | Channel count determines how many sensors can be multiplexed without external switching hardware. |
| Maximum sample rate (SPS) | 1000 | 2000 | Higher sample rate enables faster signal capture; the ADS1220 supports up to 2 kSPS versus 1 kSPS for the ADS1219. |
| Programmable gain amplifier (PGA) | 1 to 128 | 1 to 128 | PGA gain range affects the ability to resolve small sensor signals without external amplification. |
| Internal reference voltage | 2.048 V | 2.048 V | An internal reference simplifies design and improves ratiometric accuracy for bridge and RTD sensors. |
| Supply voltage range (V) | 2.7 to 5.5 | 2.3 to 5.5 | The wider lower bound of the ADS1220 allows operation from lower-voltage rails, useful in battery-powered systems. |
| Communication interface | I2C | SPI | Interface type determines host MCU compatibility and pin count; I2C uses fewer pins while SPI offers higher throughput. |
| Package | TSSOP-16 | TSSOP-16 | Identical package footprint allows drop-in board layout compatibility between the two devices. |
| Operating temperature range (°C) | -40 to 125 | -40 to 125 | Matching industrial temperature ranges ensure equivalent environmental robustness for both parts. |
| Current consumption (typical, mA) | 0.3 | 0.35 | Lower typical current draw of the ADS1219 benefits power-sensitive portable and battery-operated designs. |
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 | ADS1219IPWR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 2k | 1k |
| Number of Inputs | 2, 4 | 4 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | I²C |
| Configuration | MUX-PGA-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal, Supply | External, Internal |
| Voltage - Supply, Analog | 2.3V ~ 5.5V, ±2.5 | 2.3V ~ 5.5V |
| Voltage - Supply, Digital | 2.3V ~ 5.5V | 2.3V ~ 5.5V |
| Features | PGA, Temperature Sensor | PGA |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Ratio - S / H: ADC | - | 0:1 |
Frequently asked questions
What are the key architectural differences between the ADS1219IPWR and ADS1220IPWR?
The ADS1219IPWR is a 24-bit, 4-channel, single-cycle-settling delta-sigma ADC with an integrated 2.048 V reference and I2C interface. The ADS1220IPWR is a 24-bit, 4-channel delta-sigma ADC with a flexible input multiplexer, programmable gain amplifier (PGA), dual programmable excitation current sources, and an SPI interface. The ADS1220 includes a PGA and current sources for direct RTD/thermocouple sensing, while the ADS1219 integrates the reference and uses I2C for simpler bus routing.
Are the ADS1219IPWR and ADS1220IPWR pin-to-pin compatible?
No. Both devices are offered in a TSSOP-16 package, but their pin functions and digital interfaces differ. The ADS1219IPWR uses an I2C interface, while the ADS1220IPWR uses an SPI interface, so the pinouts are not interchangeable and PCB layouts must be designed for the specific device.
Which device offers a programmable gain amplifier (PGA)?
The ADS1220IPWR integrates a low-noise PGA with selectable gains of 1, 2, 4, 8, 16, 32, 64, and 128, enabling direct connection of low-level sensors such as thermocouples and RTDs. The ADS1219IPWR does not include an integrated PGA; it provides a fixed-gain signal path with an integrated 2.048 V reference.
How do the digital interfaces of the two ADCs differ?
The ADS1219IPWR communicates over an I2C interface supporting standard, fast, and fast-plus modes, which reduces pin count and allows multiple devices on a shared bus. The ADS1220IPWR uses a 4-wire SPI-compatible interface, which supports higher throughput and is well suited to systems already using SPI peripherals.
Do both devices include an internal voltage reference?
Yes. The ADS1219IPWR integrates a 2.048 V reference. The ADS1220IPWR also includes an internal 2.048 V reference, and it additionally supports external reference inputs and a reference selection multiplexer for ratiometric measurements.
Which device is better suited for RTD or thermocouple measurements?
The ADS1220IPWR is generally preferred for RTD and thermocouple applications because it integrates a PGA and two programmable excitation current sources, which are required for ratiometric RTD excitation and bias of thermocouples. The ADS1219IPWR lacks these integrated features, so external signal conditioning would be required for such sensor types.
What are the supply voltage and data rate considerations for these ADCs?
Both devices operate from an analog supply in the 2.7 V to 5.5 V range and support programmable data rates. The ADS1220IPWR offers data rates from 5 SPS to 2000 SPS with a 20 SPS mode that includes simultaneous 50 Hz and 60 Hz rejection. The ADS1219IPWR offers data rates from 20 SPS to 1000 SPS, with 20 SPS providing simultaneous 50 Hz and 60 Hz rejection. Designers should confirm exact limits against the respective manufacturer datasheets.
Can the ADS1219IPWR and ADS1220IPWR be used as direct substitutes in an existing design?
No. Because the devices differ in digital interface (I2C versus SPI), pinout, integrated PGA, excitation current sources, and reference architecture, they are not drop-in replacements. A substitution requires a new PCB layout, firmware changes, and revalidation of the analog signal chain against the target application requirements.