Part A
ADS1282IPWR
德州儀器
- Lifecycle
- Active
- Stock
- 3098 件
- Package
- TSSOP-28
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS1282IPWR and ADS1203IPWRG4 are not drop-in replacements for one another. The ADS1282IPWR is a high-resolution 32-bit delta-sigma ADC with an integrated PGA and low-noise architecture intended for seismic and precision sensor acquisition, while the ADS1203IPWRG4 is a 16-bit second-order delta-sigma modulator with a single-bit output stream intended for isolated current-shunt and motor-control feedback. Their resolution, output interface, input architecture, and target application domains differ fundamentally, so substituting one for the other requires a full system redesign rather than a direct board swap.
Different output interface
Different resolution class
Different input architecture
Different application domain
Parts at a glance
Part B
ADS1203IPWRG4
德州儀器
- Lifecycle
- Active
- Stock
- 4572 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 | ADS1282IPWR | ADS1203IPWRG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 31 | 16 | Resolution determines the smallest signal change the ADC can distinguish; a 31-bit delta-sigma converter offers far finer measurement granularity than a 16-bit device. |
| Architecture | Delta-Sigma (2nd order) | Delta-Sigma (2nd order) | Both use delta-sigma modulation, but the ADS1282 is a high-resolution ADC while the ADS1203 is a modulator-only device requiring external digital filtering. |
| Output Interface | SPI (digital output) | Modulator bitstream (digital output) | The ADS1282 provides a complete digital conversion via SPI, whereas the ADS1203 outputs a raw 1-bit modulator stream that must be processed by an external filter/decimator. |
| Input Type | Differential | Differential | Differential inputs improve common-mode noise rejection; both parts support differential sensing, aiding substitutability in signal-chain design. |
| Supply Voltage (analog) | 5 V (analog), 3.3 V (digital) | 5 V | Supply requirements affect board-level power design; the ADS1282 uses separate analog and digital rails while the ADS1203 runs from a single 5 V supply. |
| Data Rate / Output Word Rate | Up to 4 kSPS (programmable) | Up to 40 kSPS (modulator clock dependent) | Output rate sets the achievable signal bandwidth; the ADS1203 modulator supports higher raw rates but requires external decimation to produce usable data. |
| Package | TSSOP-28 | TSSOP-16 | Package footprint and pin count affect PCB layout and drop-in compatibility; the two devices are not pin-compatible. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range suitability is identical, so environmental constraints do not differentiate the two parts. |
| Typical Application | Seismic / energy exploration, high-resolution instrumentation | Motor control, current sensing, isolated measurement | Target applications differ significantly; the ADS1282 targets ultra-high-resolution sensing while the ADS1203 targets fast modulator-based control loops. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1282IPWR | ADS1203IPWRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| Type | - | Modulator |
| Number of Channels | - | 1 |
| Resolution(Bits) | - | 16 b |
| Sampling Rate(Per Second) | 4k | 40k |
| Data Interface | SPI | Serial |
| Voltage Supply Source | - | Single Supply |
| Voltage - Supply | - | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | - | Surface Mount |
| Number of Bits | 31 | - |
| Number of Inputs | 1 | - |
| Input Type | Differential | - |
| Configuration | ADC | - |
| Number of A/D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 5V | - |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | - |
| Features | PGA | - |
Frequently asked questions
What are the primary functional differences between the ADS1282IPWR and ADS1203IPWRG4?
The ADS1282IPWR is a high-resolution, 32-bit delta-sigma analog-to-digital converter (ADC) designed for seismic and energy exploration applications, featuring a programmable gain amplifier (PGA) and supporting data rates up to 4 kSPS. The ADS1203IPWRG4 is a 16-bit, second-order delta-sigma modulator with a digital filter interface, intended for isolated current sensing and industrial motor control, operating at a fixed clock frequency and outputting a 1-bit data stream. They differ fundamentally in resolution, output format, and target application.
Are the ADS1282IPWR and ADS1203IPWRG4 pin-compatible or package-compatible?
No. The ADS1282IPWR is supplied in a TSSOP-28 package, while the ADS1203IPWRG4 is supplied in a TSSOP-8 package. The pin counts, pin functions, and package footprints differ, so they are not pin-compatible or drop-in replacements for each other.
Can the ADS1203IPWRG4 directly replace the ADS1282IPWR in an existing design?
No. The ADS1203IPWRG4 is a 16-bit modulator with a 1-bit output stream requiring an external digital filter, whereas the ADS1282IPWR is a 32-bit ADC with an integrated digital filter and SPI-compatible interface. The output data format, resolution, package, and pinout are incompatible, so a direct replacement is not possible without redesigning the interface and signal chain.
What are the typical applications for each device?
The ADS1282IPWR is typically used in seismic data acquisition, energy exploration, and high-resolution industrial measurement systems. The ADS1203IPWRG4 is typically used in isolated current sensing, motor control, and industrial inverter applications where a modulator output is processed by an external digital filter or microcontroller.
Do both devices support the same supply voltage ranges?
No. The ADS1282IPWR operates from an analog supply of 5 V (with a digital supply of 1.8 V to 3.3 V), while the ADS1203IPWRG4 operates from a single 5 V supply. The supply requirements and internal reference configurations differ, so power-supply design must be verified against each device's datasheet.
What are the resolution and data-rate specifications of each device?
The ADS1282IPWR provides 32-bit resolution with programmable data rates up to 4 kSPS. The ADS1203IPWRG4 provides 16-bit resolution as a modulator with a 1-bit output stream at a clock frequency of up to 10 MHz, with the effective resolution determined by the external digital filter. These specifications are not interchangeable.
Are both devices available in RoHS-compliant versions?
Yes. Both the ADS1282IPWR and ADS1203IPWRG4 are offered in RoHS-compliant package options, as indicated by their respective manufacturer part numbers and datasheets. Designers should confirm the specific ordering code and compliance status with the manufacturer or authorized distributor before production.