Part A
ADS1230IPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 2859 PCS
- Package
- TSSOP-16
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1230IPW and ADS1203IPWR are not functionally interchangeable. The ADS1230IPW is a 20-bit delta-sigma ADC with an integrated PGA and on-chip oscillator, while the ADS1203IPWR is a 16-bit isolated delta-sigma modulator with a digital output interface. Their differing resolution, output format, and interface architecture make direct substitution impractical without significant system redesign.
Different output type
Different resolution
Different interface architecture
Different functional role
Parts at a glance
Part B
ADS1203IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3345 PCS
- Package
- TSSOP-8
- Series
- Acquisition de données - ADC DAC - dédié
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 | ADS1203IPWR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 20 | 16 | Resolution determines the smallest signal change the ADC can distinguish; a 20-bit device offers finer measurement granularity than a 16-bit device. |
| Architecture | Delta-Sigma (low-speed, high-resolution) | Delta-Sigma modulator (current-shunt, isolated) | The converter architecture dictates the application class; the ADS1230 targets precision weigh-scale/bridge sensing, while the ADS1203 is a modulator intended for isolated current-shunt measurement. |
| Output Interface | Serial (SPI-compatible, 2-wire) | Serial bit-stream modulator output | Interface compatibility determines whether the part can drop into an existing digital bus; the ADS1203 outputs a raw modulator bit-stream requiring external digital filtering, unlike the ADS1230's direct serial data. |
| Input Type | Differential (bridge sensor) | Differential (current-shunt) | Input configuration must match the sensor topology; both are differential but are optimized for different signal sources (bridge vs. shunt). |
| Supply Voltage | 2.7 V to 5.3 V | 4.5 V to 5.5 V | Supply range affects system-level compatibility; the ADS1230 supports lower-voltage rails, while the ADS1203 requires a nominal 5 V supply. |
| Package | 16-pin TSSOP | 16-pin TSSOP | Package footprint affects PCB layout and assembly; identical TSSOP-16 packages allow similar board space but pin functions differ. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range confirms suitability for industrial environments; both cover the standard industrial range. |
| Typical Application | Weigh scales, strain gauges, pressure sensors | Motor control, isolated current sensing, power monitoring | Application focus indicates functional substitutability; the two parts serve different end uses and are generally not interchangeable. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1230IPW | 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) | 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 ~ 125°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 ADS1203IPWR?
The ADS1230IPW is a 20-bit delta-sigma analog-to-digital converter (ADC) designed for bridge sensor applications, integrating a low-noise programmable gain amplifier (PGA) with gains of 1, 2, 64, and 128. The ADS1203IPWR is a 16-bit delta-sigma modulator with a ±250 mV input range, intended for isolated current sensing and industrial motor control, and it outputs a 1-bit data stream rather than parallel data. They are not functionally equivalent and serve different signal-chain roles.
Do the ADS1230IPW and ADS1203IPWR have compatible package and pinout configurations?
No. The ADS1230IPW is supplied in a 16-pin TSSOP (PW) package, while the ADS1203IPWR is supplied in a 16-pin SOIC (DW) package. Package body dimensions, lead pitch, and PCB land patterns differ, so the two devices are not drop-in replacements for one another.
What are the resolution and output data format differences between these two devices?
The ADS1230IPW provides 20-bit resolution and outputs parallel data over a two-wire serial interface compatible with SPI. The ADS1203IPWR provides 16-bit resolution and outputs a single-bit delta-sigma modulated data stream that must be digitally filtered by an external FPGA, DSP, or microcontroller. The output formats are fundamentally different and require different host-side interfaces.
How do the input signal ranges and PGA capabilities compare?
The ADS1230IPW includes an integrated PGA with selectable gains of 1, 2, 64, and 128, allowing direct connection of low-level bridge sensor outputs. The ADS1203IPWR has a fixed ±250 mV input range and does not include a PGA. Designs requiring high-gain sensor interfacing should account for this difference when comparing the two parts.
Are the ADS1230IPW and ADS1203IPWR intended for the same application categories?
No. The ADS1230IPW is positioned for precision weigh scales, strain-gauge bridge sensors, and pressure sensors where high resolution and low noise at low data rates are required. The ADS1203IPWR is positioned for isolated current measurement, motor control, and industrial inverter applications where a modulated output is galvanically isolated and processed digitally. Application suitability should be verified against each datasheet.
What supply voltage and reference requirements apply to each device?
The ADS1230IPW operates from a single 2.7 V to 5.3 V analog supply and supports a ratiometric reference input, typically derived from the bridge excitation voltage. The ADS1203IPWR operates from a 5 V analog supply with a separate digital supply, and its reference input defines the ±250 mV full-scale range. Designers should confirm exact supply and reference limits in the respective manufacturer datasheets before substitution.
Can the ADS1203IPWR directly replace the ADS1230IPW in an existing weigh-scale design?
No. The ADS1203IPWR lacks the integrated PGA, provides 16-bit rather than 20-bit resolution, uses a different package and pinout, and outputs a 1-bit modulated stream instead of parallel data. A direct replacement would require redesign of the analog front end, digital filtering, and PCB layout, and is not supported as a drop-in substitution.