Features
- Product developed in compliance with ISO 26262:2018 ASIL C
- Differential bridge sensor input with selectable on-chip or external temperature sensor – PTC, NTC, PN-junction, and sensor bridge resistance
- 1mV/V to 800mV/V sensor span with 12 to 18-bit resolution
- Compensation for offset, gain, and higher order nonlinearity and temperature coefficients of measured bridge sensor input signal
- Accuracy:
- 0.25%FS at -40 °C to +125 °C
- 0.5%FS at -40 °C to +155 °C
- Internal output update rate up to 200µs in the fastest mode
- Compliant with SENT standard SAE J2716 Rev. 4 (APR2016), tick time extended to 1µs resulting in SENT output time of 282µs (two fast channels)
- Third order digital LPF with a cut-off frequency of 10Hz to 1000Hz
- Fast in calibration: One-pass, end-of-line calibration algorithm minimizes production costs
- Minimum number of external components enables the design of sensor modules with best-in-class form factor
- Qualified according to AEC-Q100 Grade 0
- Operating temperature range of -40 °C to +155 °C with up to 100hrs extension up to +165 °C
Description
The RAA2S4261 is a top-tier automotive sensor signal conditioner (SSC) with SENT or I2C output, designed for precise amplification and correction of differential bridge sensor signals. It offers exceptional precision and reliability with outstanding analog pre-amplification and sensor offset correction, making it adaptable to nearly all resistive bridges. The advanced signal processing utilizes a 16-bit RISC microcontroller for accurate conditioning calculations, and data stored in nonvolatile memory. Reliable data transmission is ensured through a digital SENT interface, providing dependable transmission via a single output pin. Built for tough environments, the product features robust protection circuitry, excellent electromagnetic compatibility, and comprehensive diagnostic capabilities. Additionally, the RAA2S4261 supports end-of-line calibration and offers an OWI or I2C interface for straightforward configuration and calibration.
Parameters
| Attributes | Value |
|---|---|
| Function | Resistive SSC |
| Automotive Qual. | Yes |
| Supply Voltage (V) | 4.5 - 5.5 |
| Input Type | Single-bridge, 2 Temperature Channel |
| Interface | SENT, I2C, ZACwire™ (OWI) |
| Adj. Analog Gain | 1 - 912 |
| Resolution (bits) | 18 |
| Sample Rate Max (KHz) | 5 |
| Temp. Range (°C) | -40 to 165°C |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| VFQFPN | 3.5 x 3.5 x 0.85 | 20 | 0.5 |
Product Comparison
| RAA2S4261 | ZSSC4161 | ZSSC4162 | ZSSC4165 | ZSSC4169 | |
| Function | Resistive SSC | Resistive SSC | Resistive SSC | Resistive SSC | Resistive SSC |
| Automotive Qual. | Yes | Yes | Yes | Yes | Yes |
| Supply Voltage | 4.5 - 5.5 | 4.5 - 5.5, 4.75 - 5.25 | 4.5 - 5.5 | 4.5 - 5.5, 4.75 - 5.25 | 4.5 - 5.5, 4.75 - 5.25 |
| Input Type | Single-bridge, 2 Temperature Channel | PTC, Single-Bridge, Single-bridge, Temperature Diode | NTC, PTC, Single-Bridge, Temperature Diode | Dual-Bridge, Dual-bridge, NTC, PTC, Temperature Diode | Single-Bridge, Single-bridge, Temperature Diode |
| Interface | I2C, SENT, ZACwire™ (OWI) | I2C, SENT | I2C, SENT | I2C, SENT, ZACwire™ | I2C, SENT |
| Adj. Analog Gain | 1 - 912 | 1 - 200, 2.1 - 200 | 1 - 200 | 1 - 200, 2.1 - 200 | 2.1 - 200 |
| Resolution (bits) | 18 | 14-18, 18 | 14-18 | 14-18, 18 | 14 |
| Sample Rate Max (KHz) | 5 | 1.33, 1.48 | 1.45 | 0.9, 1.16 | 0.66, 1.3 |
| Temp. Range (°C) | -40 to 165°C | -40 to +150°C, -40 to 150°C | -40 to +150°C, -40 to 150°C | -40 to +150°C, 0 to +70°C | -40 to +150°C, -40 to 150°C |
Applications
- Electro-hydraulic braking
- Electro-mechanical braking
- Fuel cell system monitoring
- Direct hydrogen combustion
- Hydraulic pressure
- Pneumatic pressure
- Industrial automation and control systems
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