Part A
ADS1260BIRHBR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6816 PCS
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS1260BIRHBR is a higher-resolution, lower-noise upgrade path for the ADS1220IRVAR in precision sensor measurement designs, but it is not a pin-compatible drop-in: the ADS1220IRVAR uses a 16-pin VQFN while the ADS1260BIRHBR uses a 32-pin VQFN, and the two devices differ in supply range, interface options, and integrated features. Designers must validate layout, supply, and firmware changes before substituting.
Resolution and Accuracy
Validation required
Package and Pinout
Not compatible
Supply Voltage Range
Validation required
Digital Interface
Validation required
Parts at a glance
Part B
ADS1220IRVAR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4438 PCS
- Package
- VQFN-16
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | ADS1220IRVAR | ADS1260BIRHBR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 32 | Higher resolution enables detection of smaller signal changes, which is critical for precision measurement applications. |
| Number of input channels | 4 (2 differential / 4 single-ended) | 5 (5 differential / 10 single-ended) | More channels allow monitoring of additional sensors without adding external multiplexers. |
| Maximum sample rate | 2 kSPS | 40 kSPS | Higher sample rate supports faster-changing signals and higher-bandwidth measurement loops. |
| PGA gain range | 1 to 128 | 1 to 32 | PGA gain determines the smallest input signal that can be amplified to full scale, affecting low-level sensor sensitivity. |
| Interface | SPI | SPI | Both use SPI, so the host microcontroller interface is compatible, but firmware register maps differ. |
| Supply voltage (analog) | 2.3 V to 5.5 V | 4.75 V to 5.25 V (analog), 2.7 V to 5.25 V (digital) | Supply range affects compatibility with low-voltage or battery-powered systems and required regulation. |
| Package | VQFN-16 (3 mm x 3 mm) | VQFN-40 (5 mm x 5 mm) | Different package footprints require PCB layout changes and may affect board space and thermal performance. |
| Integrated features | Internal 2.048 V reference, internal oscillator, temperature sensor | Internal 2.5 V reference, internal oscillator, temperature sensor, sensor excitation current sources, AC excitation | Integrated references and excitation simplify system design and reduce external component count. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +125 °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 | ADS1260BIRHBR | ADS1220IRVAR |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | ADS1260 | - |
| Number of Bits | 24 | 24 |
| Sampling Rate (Per Second) | 40k | - |
| Number of Inputs | 5 | 2, 4 |
| 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, Supply |
| Voltage - Supply, Analog | 4.75V ~ 5.25V | 2.3V ~ 5.5V, ±2.5 |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.3V ~ 5.5V |
| Features | PGA | PGA, Temperature Sensor |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | - |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | - |
| Sampling Rate(Per Second) | - | 2k |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What are the primary differences between the ADS1220IRVAR and ADS1260BIRHBR?
The ADS1220IRVAR is a 24-bit, 4-channel, 2-kSPS delta-sigma ADC with a programmable gain amplifier and SPI interface in a 3.5-mm × 3.5-mm VQFN-16 package. The ADS1260BIRHBR is a 32-bit, 5-channel, 40-kSPS delta-sigma ADC with a PGA, reference, and SPI interface in a 5-mm × 5-mm VQFN-32 package. The ADS1260B offers higher resolution, faster output data rate, and more analog inputs, while the ADS1220I is smaller and lower power.
Are the ADS1220IRVAR and ADS1260BIRHBR pin-to-pin or package compatible?
No. The ADS1220IRVAR uses a 16-pin VQFN (RVA) package, while the ADS1260BIRHBR uses a 32-pin VQFN (RHB) package. They have different pin counts, footprints, and pin functions, so they are not drop-in replacements and require separate PCB layouts.
How do the resolution and data rates of the ADS1220IRVAR and ADS1260BIRHBR compare?
The ADS1220IRVAR provides 24-bit resolution with output data rates up to 2 kSPS. The ADS1260BIRHBR provides 32-bit resolution with output data rates up to 40 kSPS. The ADS1260B therefore delivers higher resolution and a significantly faster maximum data rate for higher-bandwidth precision measurements.
How many analog input channels does each device support?
The ADS1220IRVAR supports 4 single-ended or 2 differential analog inputs. The ADS1260BIRHBR supports 5 single-ended or 3 differential analog inputs. The ADS1260B provides one additional input channel for more flexible sensor multiplexing.
Do both devices include a programmable gain amplifier (PGA) and internal reference?
Yes. Both the ADS1220IRVAR and ADS1260BIRHBR integrate a programmable gain amplifier and an internal voltage reference, reducing external component count for precision sensor measurement. Designers should verify gain ranges and reference specifications against the respective datasheets for their target configuration.
What supply voltage ranges do the ADS1220IRVAR and ADS1260BIRHBR support?
The ADS1220IRVAR operates from an analog supply of 2.3 V to 5.5 V and a digital supply of 2.3 V to 5.5 V. The ADS1260BIRHBR operates from an analog supply of 4.75 V to 5.25 V and a digital supply of 2.7 V to 5.25 V. The ADS1220I supports lower analog supply voltages, while the ADS1260B requires a nominal 5-V analog supply.
Which device is better suited for low-power, space-constrained designs?
The ADS1220IRVAR is better suited for low-power and space-constrained designs due to its smaller 3.5-mm × 3.5-mm VQFN-16 package and lower analog supply range starting at 2.3 V. The ADS1260BIRHBR, with its larger 5-mm × 5-mm VQFN-32 package and 5-V analog supply requirement, is oriented toward higher-performance, higher-channel-count systems.
Can the ADS1220IRVAR be used as a substitute for the ADS1260BIRHBR in an existing design?
No, not as a direct substitute. The devices differ in package, pin count, resolution, data rate, channel count, and supply requirements. Any substitution requires a new PCB layout and full validation of the signal chain, reference, and timing against the target application requirements using the official datasheets.