ADS1252U
| Parameters | |
|---|---|
| Data Interface | SPI |
| Sampling Rate (Per Second) | 40k |
| Voltage - Supply, Analog | 5V |
| Voltage - Supply, Digital | 5V |
| Ratio - S/H:ADC | - |
| Features | - |
| Package | Tube |
| Product Status | Active |
| Base Product Number | ADS1252 |
| REACH Status | REACH Unaffected |
| Standard Package | 75 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Series | - |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Input Type | Differential |
| Configuration | ADC |
| Supplier Device Package | 8-SOIC |
| Number of Inputs | 1 |
| Number of Bits | 24 |
| Number of A/D Converters | 1 |
| Architecture | Sigma-Delta |
| Reference Type | External |
ADS1252U ADC 24 Bit Analog to Digital Converter 1 Input 1 Sigma-Delta
The ADS1252U is a precision, wide-dynamic-range, 24-bit delta-sigma analog-to-digital converter (ADC) manufactured by TI, housed in an 8-SOIC surface-mount package and specified for the -40 °C to +85 °C industrial temperature range. The ADS1252U employs an external voltage reference spanning 0.5 V to 5 V, integrates a fourth-order delta-sigma modulator followed by a digital filter, and communicates through a flexible 2-wire synchronous serial interface (SCLK and DOUT/DRDY) that simplifies low-cost isolation. Consuming only 8-10 mA of quiescent current at 5 V (40-50 mW operating power) and offering microampere-level power-down mode, the device is engineered for high-resolution measurement in cardiac diagnostics, smart transmitters, industrial process control, weigh scales, chromatography, and portable instrumentation.
Application Scenarios
The ADS1252U is extensively deployed wherever wide-dynamic-range, low-noise 24-bit data acquisition is required.
● In medical instrumentation, it serves as the core ADC for cardiac diagnostics, blood analysis equipment, and patient-monitoring systems that demand microvolt-level signal resolution.
● Industrial process control and smart transmitters rely on its 19-bit effective resolution and excellent INL to digitize 4-20 mA loops, RTD and thermocouple signals (direct thermocouple interface is a documented TI application), and pressure/weight inputs with high fidelity.
● Precision weigh scales and strain-gauge conditioning circuits leverage the device's low noise and external reference flexibility for ratiometric measurement.
● In analytical instruments such as liquid/gas chromatography and infrared pyrometers, the 40 kHz data rate and 9 kHz -3 dB bandwidth deliver the speed and accuracy needed for spectral and thermal analysis.
● Portable instrumentation benefits from the microampere power-down mode, extending battery life in handheld meters, data loggers, and field-deployable sensor interfaces.
Alternative ADC Models
1. ADS1256: A TI 24-bit delta-sigma ADC offering 8 single-ended / 4 differential inputs, programmable gain amplifier (PGA) up to 64×, and 30 kSPS per channel, representing the recommended multi-channel upgrade for new designs needing higher integration and on-chip PGA.
2. ADS1258: A TI 16-bit (effective 24-bit) delta-sigma ADC with 16-channel multiplexer and automatic channel scanning, suggested by TI as a high-channel-count alternative for new designs that demand faster multi-channel data acquisition.
3. MAX11205: A Maxim Integrated 24-bit, 20 SPS delta-sigma ADC with an internal oscillator and SPI interface, offering a lower-speed, single-channel functional alternative for ultra-low-power, cost-sensitive applications.
4. AD7793: An Analog Devices 24-bit delta-sigma ADC with integrated PGA, internal clock, and 3 differential inputs, presenting a feature-rich cross-vendor option for precision weigh-scale and sensor-interface designs that can accommodate a different package footprint.
