Part A
ADS1230IPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 2859 PCS
- Package
- TSSOP-16
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1230IPW and ADS1202IPWRG4 are not functionally interchangeable. Although both are precision delta-sigma converters in a TSSOP-16 package, they differ fundamentally in resolution, output interface, and input architecture, so the ADS1202IPWRG4 cannot directly replace the ADS1230IPW in an existing design without significant rework.
Different resolution
Different output interface
Different input architecture
Different supply range
Parts at a glance
Part B
ADS1202IPWRG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4745 PCS
- Package
- TSSOP-8
- Series
- Acquisição de dados - ADCs-DACs - Objetivo Especial
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS1230IPW | ADS1202IPWRG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 20 | 16 | Resolution determines the smallest signal change the ADC can distinguish; a 20-bit converter offers finer measurement granularity than a 16-bit one. |
| Architecture | Delta-Sigma (low-speed, high-resolution) | Delta-Sigma modulator (current-shunt, isolated) | The converter architecture dictates noise shaping, filtering needs, and the type of signal chain (e.g., direct sensor digitization vs. isolated current sensing) the part suits. |
| Input type | Differential | Differential | Differential inputs reject common-mode noise; both parts support differential sensing, which is important for low-level signal measurement. |
| Output interface | Serial (SPI-compatible, 2-wire) | Serial bit-stream (modulator output) | The output format determines how the host processor reads data; a bit-stream modulator output requires an external digital filter, unlike a direct SPI data output. |
| Supply voltage (analog) | 2.7 V to 5.3 V | 4.5 V to 5.5 V | Supply range affects compatibility with the system rail; the wider low-voltage range of one part allows operation from 3.3 V systems. |
| Data rate / output rate | 10 SPS or 80 SPS (selectable) | Up to 40 kSPS (modulator clock dependent) | Output rate sets the trade-off between speed and noise; one part targets slow precision weighing, the other higher-speed current-shunt monitoring. |
| Package | 16-pin TSSOP | 8-pin TSSOP | Package and pin count affect PCB footprint and layout; these parts are not drop-in footprint compatible. |
| Typical application | Weigh scales, strain gauges, pressure sensors | Motor control current sensing, isolated shunt measurement | Intended application indicates the signal chain and system context each part was optimized for, guiding functional substitutability. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1230IPW | 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) | 80 | 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 | 20 | - |
| Number of Inputs | 1 | - |
| Input Type | Differential, Single Ended | - |
| Configuration | PGA-ADC | - |
| Number of A/D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 2.7V ~ 5.3V | - |
| Voltage - Supply, Digital | 2.7V ~ 5.3V | - |
| Features | PGA | - |
Frequently asked questions
What are the primary functional differences between the ADS1230IPW and ADS1202IPWRG4?
The ADS1230IPW is a 20-bit delta-sigma analog-to-digital converter designed primarily for weigh-scale and bridge-sensor applications, integrating a low-noise PGA with gains of 1, 2, 64, and 128. The ADS1202IPWRG4 is a 16-bit delta-sigma modulator that outputs a 1-bit data stream for isolated signal conditioning and motor-control current-sensing applications, requiring an external digital filter or FPGA to derive the digital output word.
Do the ADS1230IPW and ADS1202IPWRG4 have compatible package and pinout configurations?
No. The ADS1230IPW is supplied in a 16-pin TSSOP (PW) package, while the ADS1202IPWRG4 is supplied in a 10-pin TSSOP (PW) package with a different pin assignment. The two devices are not pin-to-pin compatible and cannot be interchanged on the same PCB land pattern without redesign.
What are the resolution and output-format differences between these two converters?
The ADS1230IPW provides a 20-bit fully differential digital output over a serial interface, with no-load 20-bit resolution and 19.2-bit effective resolution at gain 128 per the datasheet. The ADS1202IPWRG4 is a 16-bit modulator that produces a 1-bit delta-sigma bitstream at a 10 MHz master clock, and its effective resolution depends on the external digital filter and decimation ratio selected by the system designer.
How do the supply voltage and reference requirements compare between the ADS1230IPW and ADS1202IPWRG4?
The ADS1230IPW operates from a single 2.7 V to 5.3 V analog supply and a 2.7 V to 5.3 V digital supply, with an external reference input (REF) that sets the full-scale range. The ADS1202IPWRG4 operates from a 4.5 V to 5.5 V analog supply and a 2.7 V to 5.5 V digital supply, and it uses an external reference voltage on the REF pin to define the modulator full-scale input range.
Are the ADS1230IPW and ADS1202IPWRG4 suited to the same application types?
No. The ADS1230IPW is intended for direct sensor digitization such as weigh scales, strain-gauge bridges, and pressure sensors because it integrates a PGA and provides a complete 20-bit ADC output. The ADS1202IPWRG4 is intended for isolated current sensing, motor control, and industrial process control where a 1-bit modulator stream is galvanically isolated and processed by an external digital filter.
What are the maximum output data rates of the ADS1230IPW and ADS1202IPWRG4?
The ADS1230IPW supports selectable output data rates of 10 SPS and 80 SPS, as defined by the datasheet. The ADS1202IPWRG4 produces a 1-bit modulator output at a clock rate of up to 10 MHz, and the effective output word rate is determined by the external decimation filter, not by an on-chip programmable data rate.
Can the ADS1202IPWRG4 be used as a drop-in replacement for the ADS1230IPW in an existing weigh-scale design?
No. The ADS1202IPWRG4 lacks the integrated PGA and the 20-bit digital output of the ADS1230IPW, uses a different 10-pin package and pinout, and requires an external digital filter to produce a usable conversion result. A weigh-scale design based on the ADS1230IPW would require hardware and firmware redesign to adopt the ADS1202IPWRG4.