特長
- Digital compensation of sensor offset, sensitivity, temperature drift, and nonlinearity
- Programmable analog gain and digital gain; accommodates bridges with spans <1mV/V and high offset
- Many diagnostic features on chip (e.g., EEPROM signature, bridge connection checks, bridge short detection, power loss detection)
- Independently programmable high and low clipping levels
- 24-bit customer ID field for module traceability
- Digital calibration and configuration via one-wire interface quick and precise
- Internal temperature compensation reference (no external components)
- Option for external temperature compensation with addition of single diode
- Output options: rail-to-rail ratiometric analog voltage (12-bit resolution), absolute analog voltage, digital one-wire-interface
- Supply voltage 2.7V to 5.5V, with external JFET, 5.5V to 30V
- Fast power-up to data output response, output available 5ms after power up
- Current consumption depends on the programmed sample rate: 1mA down to 250µA (typical)
説明
The ZSC31015 (RBicdLite™) is a CMOS integrated circuit for highly accurate amplification and sensor-specific correction of bridge sensor signals. Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity is accomplished via an internal digital signal processor running a correction algorithm with calibration coefficients stored in a non-volatile EEPROM. The ZSC31015 is adjustable to nearly all piezoresistive bridge sensors. Measured and corrected bridge values are provided at the SIG™ pin, which can be configured as an analog voltage output or as a one-wire serial digital output. The digital one-wire interface can be used for a simple PC-controlled calibration procedure to program a set of calibration coefficients into an on-chip EEPROM. The calibrated ZSC31015 and a specific sensor are mated digitally: fast, precise, and without the cost overhead associated with trimming by external devices or laser. Integrated diagnostics functions make the ZSC31015 particularly well suited for automotive applications.
パラメータ
| 属性 | 値 |
|---|---|
| Function | Resistive SSC |
| Automotive Qual. | No |
| Supply Voltage (V) | 2.7 - 30 |
| Input Type | Single-bridge |
| Interface | Ratiometric Voltage, Absolute Voltage, ZACwire™ |
| Adj. Analog Gain | 6 - 6, 24 - 24, 48 - 48, 96 - 96 |
| Resolution (bits) | 14 |
| Sample Rate Max (KHz) | 1 |
| Temp. Range (°C) | -25 to +85°C, -40 to +125°C, -50 to +150°C |
アプリケーション・ブロック図
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