The PGA308 is a programmable analog sensor signal conditioner. The analog signal path amplifies the sensor signal and provides digital calibration for offset and gain. Calibration is done via the 1W pin, a digital One-Wire, UART-compatible interface. For three-terminal sensor modules, 1W may be connected to VOUT and the assembly programmed through the VOUT pin. Gain and offset calibration parameters are stored onboard in seven banks of one-time programmable (OTP) memory. The power-on reset (POR) OTP bank may be programmed a total of four times.
The all-analog signal path contains a 2×2 input multiplexer (mux) to allow electronic sensor lead swapping, a coarse offset adjust, an auto-zero programmable gain instrumentation amplifier (PGA), a fine gain adjust, a fine offset adjust, and a programmable gain output amplifier. Fault monitor circuitry detects and signals sensor burnout, overload, and system fault conditions. Over/under-scale limits provide additional means for system level diagnostics. The dual-use DOUT/VCLAMP pin can be used as a programmable digital output or as a VOUT over-voltage clamp.
For detailed application information, see the PGA308 User's Guide (SBOU069) available for download at www.ti.com.
# Input Channels |
Vs (Min) (V) |
Vs (Max) (V) |
Resolution (Bits) |
Interface |
Rating |
Operating Temperature Range (C) |
Package Size: mm2:W x L (PKG) |
Package Group |
PGA308 |
---|
2 |
2.7 |
5.5 |
16 |
UART |
Catalog |
-40 to 125 |
10VSON: 12 mm2: 3 x 4(VSON) 10VSSOP: 15 mm2: 4.9 x 3(VSSOP) |
VSON VSSOP |
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Version | Part Number | Definition |
---|---|---|
Automotive | PGA308-Q1 | Q100 devices qualified for high-reliability automotive applications targeting zero defects |