Part A
ADS1263IPW
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 4618 個数
- Package
- TSSOP-28
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1263IPW and ADS1203IPWRG4 are not drop-in replacements for one another. The ADS1263IPW is a 32-bit, 10-channel delta-sigma ADC with an integrated PGA and dual excitation current sources, while the ADS1203IPWRG4 is a single-channel, 16-bit isolated delta-sigma modulator with a digital output. They differ in resolution, channel count, output interface, and package, so the ADS1203IPWRG4 cannot directly substitute for the ADS1263IPW in existing designs without significant redesign.
Different output type
Different channel count
Different resolution
Different package
Parts at a glance
Part B
ADS1203IPWRG4
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 4572 個数
- Package
- TSSOP-8
- Series
- データ取得 - ADC/DAC - 特殊用途向け
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS1263IPW | ADS1203IPWRG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 32 | 16 | Resolution determines the smallest signal change the ADC can distinguish; a 32-bit delta-sigma converter offers far finer resolution than a 16-bit device. |
| Architecture | Delta-Sigma (with integrated PGA and reference) | Delta-Sigma modulator | The ADS1263 integrates a PGA and voltage reference for direct sensor connection, while the ADS1203 is a modulator-only device requiring external signal conditioning and digital filtering. |
| Number of input channels | 10 (5 differential / 10 single-ended) | 1 (differential) | Channel count determines how many signals can be measured; the ADS1263 supports multi-channel systems while the ADS1203 handles a single differential input. |
| Output interface | SPI | Digital modulator output (1-bit stream) | The ADS1263 provides a standard SPI digital output, whereas the ADS1203 outputs a 1-bit modulator stream that must be processed by an external digital filter, affecting system architecture. |
| Data rate / output rate | Up to 38.4 kSPS | Up to 40 kSPS (modulator clock dependent) | Output data rate affects measurement speed and bandwidth; both are similar but the ADS1203 rate depends on the external modulator clock and digital filter. |
| Integrated PGA | Yes | No | An integrated PGA allows direct amplification of small sensor signals; the ADS1203 lacks one, requiring external gain stages for low-level inputs. |
| Integrated voltage reference | Yes | No | An on-chip reference simplifies design and improves accuracy; the ADS1203 requires an external reference, adding components and board space. |
| Supply voltage | 5 V (analog), 2.7 V to 5.25 V (digital) | 5 V (analog and digital) | Supply requirements affect power design and logic-level compatibility; the ADS1263 offers a wider digital supply range for flexible interfacing. |
| Package | 28-pin TSSOP | 16-pin TSSOP | Package size and pin count affect PCB layout and footprint; the two devices are not drop-in compatible due to different pinouts and dimensions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1263IPW | ADS1203IPWRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| Type | - | Modulator |
| Number of Channels | - | 1 |
| Resolution(Bits) | - | 16 b |
| Sampling Rate(Per Second) | 38k | 40k |
| Data Interface | SPI | Serial |
| Voltage Supply Source | - | Single Supply |
| Voltage - Supply | - | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | - | Surface Mount |
| Number of Bits | 32 | - |
| Number of Inputs | 5, 10 | - |
| Input Type | Differential, Single Ended | - |
| Configuration | MUX-PGA-ADC | - |
| Number of A/D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External, Internal | - |
| Voltage - Supply, Analog | 5V | - |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | - |
| Features | PGA, Temperature Sensor | - |
Frequently asked questions
What are the primary functional differences between the ADS1263IPW and ADS1203IPWRG4?
The ADS1263IPW is a 32-bit, 38-kSPS delta-sigma ADC with an integrated PGA, dual excitation current sources, and a 24-bit auxiliary ADC, housed in a TSSOP-28 package. The ADS1203IPWRG4 is a 16-bit, 10-MHz second-order delta-sigma modulator with a single-bit output, housed in a TSSOP-8 package. They serve different signal-chain roles: the ADS1263 is a complete precision measurement ADC, while the ADS1203 is a modulator intended for isolated or FPGA-based current-sense and signal-isolation applications.
Are the ADS1263IPW and ADS1203IPWRG4 pin-to-pin or package compatible?
No. The ADS1263IPW uses a TSSOP-28 package, while the ADS1203IPWRG4 uses a TSSOP-8 package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
What are the resolution and output data rate specifications for each device?
The ADS1263IPW provides up to 32-bit resolution on its main ADC with programmable data rates from 2.5 SPS to 38.4 kSPS, plus a 24-bit auxiliary ADC. The ADS1203IPWRG4 is a 16-bit delta-sigma modulator with a 10-MHz master clock input, producing a single-bit data stream whose effective resolution depends on the external digital filter and decimation ratio.
Do both devices include an integrated programmable gain amplifier (PGA)?
No. The ADS1263IPW integrates a PGA with selectable gains of 1 to 32 on its main ADC inputs. The ADS1203IPWRG4 does not include an integrated PGA; it is a modulator-only device, so any gain or filtering must be implemented externally in the analog front end or in the digital filter.
What are the supply voltage requirements for the ADS1263IPW and ADS1203IPWRG4?
The ADS1263IPW operates from an analog supply of 5 V (4.75 V to 5.25 V) and a digital supply of 2.7 V to 5.25 V, with an internal reference and support for external reference inputs. The ADS1203IPWRG4 operates from a single 5-V analog supply (4.5 V to 5.5 V) and a 2.7-V to 5.5-V digital supply, with an external reference input for the modulator.
Which device is better suited for isolated current-sensing or shunt-based measurement?
The ADS1203IPWRG4 is specifically intended for isolated current-sense applications: its single-bit modulator output can be passed through a digital isolator to an FPGA or microcontroller, where a sinc filter reconstructs the measurement. The ADS1263IPW is a complete ADC with integrated PGA and reference, better suited to direct precision measurement at the board level rather than through an isolation barrier.
Can the ADS1203IPWRG4 be used as a direct substitute for the ADS1263IPW in an existing design?
No. Beyond the package and pin-count differences, the ADS1203IPWRG4 outputs a single-bit modulator stream requiring an external digital decimation filter, whereas the ADS1263IPW provides parallel/SPI-accessible converted data words with on-chip filtering, PGA, and reference. A redesign of the digital interface, filtering, and analog front end would be required.
What digital interfaces do these two devices provide?
The ADS1263IPW provides an SPI-compatible serial interface for configuration and data readback, along with GPIO and multiple internal monitoring functions. The ADS1203IPWRG4 provides a single-bit delta-sigma data output plus a clock input; it has no configuration register interface, and all signal processing is performed externally in the digital domain.