Part A
ADS1282IPW
Техасские инструменты
- Lifecycle
- Active
- Stock
- 4636 ПКС
- Package
- TSSOP-28
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1282IPW and ADS1202IPWRG4 are not functionally interchangeable. The ADS1282IPW is a high-resolution 31-bit delta-sigma ADC with an integrated PGA and low-noise architecture intended for seismic and precision sensor acquisition, while the ADS1202IPWRG4 is a 16-bit second-order delta-sigma modulator delivering a single-bit data stream for isolated current and voltage sensing. Their resolution, output format, input architecture, and target application domains differ fundamentally, so substituting one for the other would require a complete redesign of the signal chain, digital interface, and system calibration.
Different output type
Different resolution class
Different input architecture
Different application domain
Parts at a glance
Part B
ADS1202IPWRG4
Техасские инструменты
- Lifecycle
- Active
- Stock
- 4745 ПКС
- Package
- TSSOP-8
- Series
- Сбор данных - ADC-DAC - Специальное назначение
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS1282IPW | ADS1202IPWRG4 | 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 precision than a 16-bit device. |
| Architecture | Delta-Sigma (2nd order) | Delta-Sigma (2nd order) | Both use delta-sigma modulation, but the ADS1282 integrates a full ADC with PGA while the ADS1202 is a modulator-only device requiring external digital filtering. |
| Input Type | Differential | Differential | Differential inputs reject common-mode noise; both parts share this, but the ADS1282 adds an integrated PGA for direct sensor connection. |
| Data Interface | SPI (serial) | Serial (modulator bitstream) | The ADS1282 outputs fully filtered digital codes over SPI, while the ADS1202 outputs a raw 1-bit modulator stream that must be decimated externally, affecting system architecture. |
| Supply Voltage (analog) | 5 V (analog), 3.3 V (digital) | 5 V | Supply requirements affect board-level power design and level shifting; the ADS1282 supports separate analog and digital rails for easier interfacing. |
| Integrated PGA | Yes | No | An integrated programmable gain amplifier allows the ADS1282 to directly amplify low-level sensor signals, whereas the ADS1202 requires external signal conditioning. |
| Package | TSSOP-28 | TSSOP-16 | Package footprint and pin count affect PCB layout and cannot be directly substituted without redesign. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Both cover the industrial temperature range, so environmental robustness is comparable for industrial applications. |
| Typical Application | Seismic and energy exploration, precision sensor measurement | Motor control, current sensing, isolated measurement | The intended application domains differ significantly, indicating the parts are not functionally interchangeable despite sharing delta-sigma architecture. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1282IPW | ADS1202IPWRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| 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 ~ 85°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 ADS1282IPW and ADS1202IPWRG4?
The ADS1282IPW is a high-resolution, 31-bit delta-sigma analog-to-digital converter designed for seismic and energy exploration applications, featuring a programmable gain amplifier and dual-channel input. The ADS1202IPWRG4 is a 16-bit, 10 MHz second-order delta-sigma modulator intended for isolated current and voltage sensing in motor control and power inverter applications. They differ fundamentally in resolution, architecture, and target application.
Do the ADS1282IPW and ADS1202IPWRG4 have compatible package footprints?
No. The ADS1282IPW is supplied in a 28-pin TSSOP (PW) package, while the ADS1202IPWRG4 is supplied in a 16-pin TSSOP (PW) package. The different pin counts and pin functions prevent a direct PCB footprint substitution.
What are the specified resolution and data rate characteristics of each device?
The ADS1282IPW provides up to 31-bit resolution with programmable data rates from 250 SPS to 4 kSPS. The ADS1202IPWRG4 is a 16-bit modulator with a maximum clock frequency of 10 MHz, producing a 1-bit output stream whose effective resolution depends on the external digital filter and oversampling ratio.
Are the supply voltage requirements of the ADS1282IPW and ADS1202IPWRG4 the same?
No. The ADS1282IPW operates from an analog supply of 5 V (AVDD) and a digital supply of 1.8 V to 3.3 V (DVDD). The ADS1202IPWRG4 operates from a single 5 V supply (AVDD and DVDD both at 5 V nominal). Designers must verify supply rails against the respective datasheets before considering any substitution.
Can the ADS1202IPWRG4 be used as a drop-in replacement for the ADS1282IPW in seismic acquisition designs?
No. The ADS1282IPW integrates a programmable gain amplifier, on-chip digital filter, and achieves 31-bit resolution required for seismic and energy exploration. The ADS1202IPWRG4 is a modulator-only device with 16-bit resolution and no integrated digital filter, so it cannot meet the resolution or signal-chain requirements of ADS1282IPW applications without additional external circuitry and redesign.
What output interface does each device provide?
The ADS1282IPW provides a serial peripheral interface (SPI)-compatible output with a digital filter, delivering fully decimated conversion results. The ADS1202IPWRG4 outputs a 1-bit delta-sigma modulated data stream that requires an external digital filter or FPGA/sinc filter to reconstruct the conversion result.
What are the typical target applications for the ADS1282IPW versus the ADS1202IPWRG4?
The ADS1282IPW is intended for high-resolution seismic data acquisition, energy exploration, and precision industrial measurement. The ADS1202IPWRG4 is intended for isolated current sensing, motor control, power inverters, and industrial process control where a modulated bitstream is processed by an external controller.