Part A
ADS1252U/2K5
Texas Instruments
- Lifecycle
- Active
- Stock
- 6702 PCS
- Package
- SOIC-8
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1252U/2K5 and ADS1201UG4 are not drop-in replacements for one another. Although both are single-channel delta-sigma analog-to-digital converters from Texas Instruments, they differ fundamentally in resolution, output interface, package footprint, and modulator architecture, so substituting one for the other requires a full redesign of the surrounding digital interface and signal chain rather than a direct board swap.
Different output interface
Different resolution
Different package footprint
Different modulator architecture
Parts at a glance
Part B
ADS1201UG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 6830 PCS
- Package
- SOIC-16
- 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 | ADS1252U/2K5 | ADS1201UG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit, so resolution alone does not differentiate them for substitutability. |
| Architecture | Delta-Sigma (ADC) | Delta-Sigma Modulator | The ADS1252 is a complete ADC with digital filter and interface, while the ADS1201 is a modulator requiring external digital filtering, affecting direct drop-in use. |
| Output Interface | Serial (SPI-compatible) | Serial bit-stream (modulator output) | Different output formats mean the host system must support the corresponding interface; they are not pin/function compatible. |
| Input Type | Differential | Differential | Both accept differential inputs, which is important for noise rejection in precision measurement. |
| Supply Voltage (V) | 5 | 5 | Matching supply simplifies power design, though external filtering requirements differ. |
| Data Rate / Output Word Rate | Up to ~41 kSPS | Up to ~10 kSPS (modulator clock dependent) | Throughput differs; the ADS1252 offers higher usable output rate for direct ADC use. |
| Package | SOIC-8 | SOIC-16 | Different package footprints prevent direct board-level substitution. |
| Internal Reference | No (external reference required) | No (external reference required) | Both need an external reference, so reference design can be shared. |
| Operating Temperature Range (°C) | -40 to +85 | -40 to +85 | Identical temperature ratings support use in similar industrial environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1252U/2K5 | ADS1201UG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | - | Modulator |
| Number of Channels | - | 1 |
| Resolution(Bits) | - | 24 b |
| Sampling Rate(Per Second) | 40k | 1k |
| Data Interface | SPI | Serial |
| Voltage Supply Source | - | Analog and Digital |
| Voltage - Supply | - | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | - | Surface Mount |
| Number of Bits | 24 | - |
| 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 | 5V | - |
Frequently asked questions
What are the primary functional differences between the ADS1252U/2K5 and the ADS1201UG4?
The ADS1252U/2K5 is a 24-bit delta-sigma analog-to-digital converter (ADC) designed for high-resolution, low-speed precision measurement, delivering up to 40 kSPS. The ADS1201UG4 is a 24-bit delta-sigma modulator that outputs a 1-bit data stream for use with external digital filters, typically in isolated or high-speed signal chain applications. The ADS1252 integrates a complete ADC with digital filter and serial interface, while the ADS1201 provides a modulator output requiring external processing.
Are the ADS1252U/2K5 and ADS1201UG4 pin-compatible or package-compatible?
No. The ADS1252U/2K5 is supplied in an SOIC-8 (U) package, while the ADS1201UG4 is supplied in a SOIC-16 (DW or U) package. The pin counts and pin functions differ, so they are not drop-in replacements and require different PCB land patterns.
What are the specified resolution and data rate characteristics of each device?
The ADS1252U/2K5 provides 24-bit resolution with a maximum data rate of 40 kSPS. The ADS1201UG4 is a 24-bit delta-sigma modulator with a typical clock frequency of 10 MHz and an output data rate determined by the external digital filter, commonly supporting up to 40 kSPS or higher depending on filter configuration. Both are 24-bit class devices but differ in output format and achievable throughput.
How do the output interfaces of the ADS1252U/2K5 and ADS1201UG4 differ?
The ADS1252U/2K5 provides a serial peripheral interface (SPI-compatible) with a complete digital filter, outputting converted 24-bit words. The ADS1201UG4 outputs a 1-bit delta-sigma modulated data stream that must be processed by an external digital filter or FPGA/DSP to obtain a multi-bit result. This makes the ADS1252 suitable for standalone ADC use, while the ADS1201 is intended for systems with dedicated digital filtering.
What are the typical supply voltage and power consumption specifications for these parts?
The ADS1252U/2K5 operates from a single 5 V analog supply (with a separate digital supply) and typically consumes approximately 35 mW. The ADS1201UG4 operates from a 5 V analog supply and a 3 V to 5 V digital supply, with typical power consumption around 25 mW. Exact values should be confirmed against the respective manufacturer datasheets for the specific grade and test conditions.
In what application scenarios would the ADS1252U/2K5 be preferred over the ADS1201UG4?
The ADS1252U/2K5 is preferred in precision measurement systems such as industrial process control, weigh scales, and instrumentation where a complete ADC with integrated digital filter and SPI interface simplifies the design. The ADS1201UG4 is preferred in isolated signal chains, motor control, and applications requiring a modulator output for custom digital filtering or galvanic isolation, where the 1-bit stream is processed externally.
Do the ADS1252U/2K5 and ADS1201UG4 share the same operating temperature range?
Both devices are typically specified for the industrial temperature range of –40°C to +85°C. However, designers should verify the exact grade suffix and datasheet limits for each part, as temperature specifications can vary by package and grade.