Part A
ADS1260BIRHBR
德州儀器
- Lifecycle
- Active
- Stock
- 6816 件
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS1204IRHBR and ADS1260BIRHBR are not drop-in replacements for one another. The ADS1204IRHBR is a four-channel, second-order delta-sigma modulator delivering a 1-bit serial data stream, while the ADS1260BIRHBR is a single-channel, 32-bit precision delta-sigma ADC with an integrated PGA and SPI interface. They differ in resolution architecture, channel count, digital interface, and package footprint, so substituting one for the other requires a full redesign of the signal chain, firmware, and PCB layout.
Different output type
Different channel count
Different digital interface
Different package footprint
Parts at a glance
Part B
ADS1204IRHBR
德州儀器
- Lifecycle
- Active
- Stock
- 6898 件
- Package
- VQFN-32
- Series
- 資料獲取-ADC DAC-專用
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS1204IRHBR | ADS1260BIRHBR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 32 | Higher resolution enables finer measurement of small signal changes, which is critical for precision sensing applications. |
| Architecture | Delta-Sigma (4th order) | Delta-Sigma | The modulator architecture affects noise shaping, linearity, and achievable effective resolution for the target bandwidth. |
| Number of input channels | 4 (differential) | 5 (differential/multiplexed) | Channel count determines how many sensor signals can be measured without external multiplexing. |
| Interface | Serial (SPI-compatible) | SPI | Interface compatibility dictates whether the part can drop into an existing digital bus without redesign. |
| Supply voltage (analog) | 4.5 V to 5.5 V | 4.75 V to 5.25 V (analog), 2.7 V to 5.25 V (digital) | Supply range must match the system rails; a narrower range may require additional regulation. |
| Integrated PGA | No | Yes | An integrated PGA allows direct connection of low-level sensors without external amplification, simplifying the signal chain. |
| Package | VQFN-24 (RHB) | VQFN-24 (RHB) | Package footprint and pinout determine PCB layout compatibility for substitution. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +125 °C | The temperature range must cover the application environment for reliable operation. |
| Data output rate | Up to 40 kSPS | Up to 40 kSPS | Output data rate sets the maximum signal bandwidth and affects noise versus speed trade-offs. |
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 | ADS1204IRHBR |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | ADS1260 | - |
| Number of Bits | 24 | - |
| Sampling Rate (Per Second) | 40k | - |
| Number of Inputs | 5 | - |
| Input Type | Differential, Single Ended | - |
| Data Interface | SPI | Parallel |
| Configuration | MUX-PGA-ADC | - |
| Number of A / D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External, Internal | - |
| Voltage - Supply, Analog | 4.75V ~ 5.25V | - |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | - |
| Features | PGA | - |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 105°C |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | - |
| Type | - | Modulator |
| Number of Channels | - | 4 |
| Resolution(Bits) | - | 16 b |
| Sampling Rate(Per Second) | - | 40k |
| Voltage Supply Source | - | Analog and Digital |
| Voltage - Supply | - | 2.7V ~ 5.5V |
Frequently asked questions
What are the primary functional differences between the ADS1204IRHBR and the ADS1260BIRHBR?
The ADS1204IRHBR is a four-channel, second-order delta-sigma modulator with a nominal 16-bit resolution and a maximum data rate of 40 kSPS, designed for isolated current and voltage sensing. The ADS1260BIRHBR is a single-channel, 24-bit delta-sigma ADC with an integrated PGA, reference, and sensor excitation, supporting data rates up to 40 kSPS in a 5 mm × 5 mm VQFN package. The ADS1204 provides modulator outputs for external digital filtering, while the ADS1260B integrates a complete ADC signal chain with SPI interface.
Are the ADS1204IRHBR and ADS1260BIRHBR pin-to-pin or package compatible?
No. The ADS1204IRHBR is supplied in a 32-pin VQFN (RHB) package, and the ADS1260BIRHBR is supplied in a 40-pin VQFN (RHB) package. The pin counts, pin functions, and PCB land patterns differ, so they are not direct drop-in replacements.
What are the supply voltage requirements for each device?
The ADS1204IRHBR operates from a single 5 V analog supply (AVDD) with a 2.7 V to 5.5 V digital supply (DVDD). The ADS1260BIRHBR operates from a 5 V analog supply and a 2.7 V to 5.5 V digital supply, and it includes an integrated low-noise PGA and reference that must be considered in the supply and decoupling design.
Which device is better suited for isolated shunt-based current sensing?
The ADS1204IRHBR is specifically intended for isolated current sensing because its modulator output can be routed across an isolation barrier to a digital filter on the controller side. The ADS1260BIRHBR is a complete ADC with SPI output and is typically used for direct, non-isolated precision sensor measurement unless external isolation is added.
How do the resolution and data rate specifications compare?
The ADS1204IRHBR is a 16-bit modulator with a maximum data rate of 40 kSPS. The ADS1260BIRHBR is a 24-bit ADC with programmable data rates up to 40 kSPS. The ADS1260BIRHBR therefore offers higher nominal resolution, while both devices share a comparable maximum output data rate.
Do both devices include an integrated voltage reference?
No. The ADS1204IRHBR does not include an integrated voltage reference and requires an external reference for ratiometric or absolute measurements. The ADS1260BIRHBR includes an integrated precision voltage reference, along with a PGA and sensor excitation current sources.
What digital interface does each device provide?
The ADS1204IRHBR provides a delta-sigma modulator bitstream output (data and clock) that requires an external digital filter, such as an FPGA or DSP sinc filter. The ADS1260BIRHBR provides a standard SPI-compatible serial interface for configuration and data readout.
Can the ADS1204IRHBR be replaced by the ADS1260BIRHBR in an existing design?
Not directly. The devices differ in package pin count, interface type, channel count, resolution, and integration level. A replacement requires a new PCB layout, updated firmware or digital filtering, and revalidation of the signal chain against the target specifications.