Part A
ADS1263IPW
德州儀器
- Lifecycle
- Active
- Stock
- 4618 件
- Package
- TSSOP-28
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS1263IPW and ADS1203IPWR are not functionally interchangeable. The ADS1263IPW is a 32-bit, 10-channel precision delta-sigma ADC with an integrated PGA and dual excitation current sources, while the ADS1203IPWR is a single-channel 16-bit isolated delta-sigma modulator with a digital output. Their resolution, channel count, output interface, and package footprint differ fundamentally, so the ADS1203IPWR cannot serve as a substitute for the ADS1263IPW in existing designs.
Different output type
Different channel count
Different resolution
Different footprint
Parts at a glance
Part B
ADS1203IPWR
德州儀器
- Lifecycle
- Active
- Stock
- 3345 件
- Package
- TSSOP-8
- 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 | ADS1263IPW | ADS1203IPWR | 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 is a complete ADC with PGA and reference, while the ADS1203 is a modulator-only device requiring external digital filtering, affecting system design and substitutability. |
| 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 (bitstream) | The interface dictates how the host reads data; SPI provides direct register/data access, whereas the ADS1203 outputs a modulated bitstream needing external filtering. |
| Maximum data rate / output rate | Up to 38.4 kSPS | Up to 40 kSPS (modulator clock dependent) | Data rate affects achievable bandwidth and noise; comparable rates mean similar throughput capability but with different filtering requirements. |
| Supply voltage | 5 V analog (2.7 V to 5.25 V digital) | 5 V (single supply) | Supply requirements determine power-rail compatibility; both operate around 5 V but the ADS1263 has separate analog and digital rails. |
| Integrated PGA | Yes | No | An integrated PGA allows direct connection of low-level sensors without external amplification, simplifying design and improving substitutability for sensor applications. |
| Integrated voltage reference | Yes | No | An on-chip reference reduces external component count and board space; the ADS1203 requires an external reference for accurate conversion. |
| Package | TSSOP-28 | TSSOP-16 (tape and reel) | Package footprint and pin count affect PCB layout and drop-in compatibility; different packages require layout changes. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +105 °C | The temperature range defines environmental robustness; the ADS1263 supports a wider high-temperature margin for harsh environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1263IPW | ADS1203IPWR |
|---|---|---|
| Supplier | - | Texas Instruments,Rochester Electronics, LLC |
| 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 ADS1203IPWR?
The ADS1263IPW is a 32-bit, 38-kSPS, 10-channel delta-sigma ADC with an integrated PGA and dual excitation current sources, designed for high-precision sensor measurement. The ADS1203IPWR is a 16-bit, 10-MHz clock, second-order delta-sigma modulator that outputs a 1-bit data stream for isolated or FPGA-based current sensing and shunts. The ADS1263 integrates a full ADC signal chain, while the ADS1203 is a modulator requiring external digital filtering.
Are the ADS1263IPW and ADS1203IPWR pin-to-pin or package compatible?
No. The ADS1263IPW is supplied in a 28-pin TSSOP (PW) package, while the ADS1203IPWR is supplied in a 16-pin TSSOP (PW) package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for one another.
What are the resolution and data rate specifications for each device?
The ADS1263IPW provides up to 32-bit resolution with programmable data rates from 2.5 SPS to 38.4 kSPS. The ADS1203IPWR is a 16-bit modulator with a 10 MHz maximum clock input, producing a 1-bit output stream whose effective resolution depends on the external digital filter and oversampling ratio selected by the system designer.
Do both devices include an integrated programmable gain amplifier (PGA)?
No. The ADS1263IPW includes an integrated low-noise PGA with selectable gains of 1 to 32, allowing direct connection of low-level sensor signals. The ADS1203IPWR does not include an integrated PGA; any gain or signal conditioning must be provided externally before the modulator input.
What are the typical application areas for the ADS1263IPW versus the ADS1203IPWR?
The ADS1263IPW is typically used in precision weigh scales, temperature and pressure sensing, chromatography, and industrial process control where high resolution and low noise are required. The ADS1203IPWR is typically used in motor control current sensing, isolated shunt measurement, power monitoring, and applications where a modulator output is processed by an FPGA or digital isolator.
How do the output interfaces of the ADS1263IPW and ADS1203IPWR differ?
The ADS1263IPW provides a SPI-compatible serial interface for reading conversion results and configuring registers. The ADS1203IPWR outputs a single-bit delta-sigma data stream (MDAT) along with a clock (MCLK), which must be filtered externally by a digital filter such as a sinc filter in an FPGA or microcontroller.
Can the ADS1203IPWR be used as a direct substitute for the ADS1263IPW in an existing design?
No. The devices differ in package, pin count, resolution, interface, and signal-chain architecture. Substitution would require redesign of the PCB, external digital filtering, and signal conditioning, and must be validated against the respective manufacturer datasheets.