PGA308 Single Supply, Auto-Zero Sensor Amplifier w/Programmable Gain & Offset | TI.com

PGA308 (ACTIVE)

Single Supply, Auto-Zero Sensor Amplifier w/Programmable Gain & Offset

 

Description

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.

Features

  • Digital Calibration for Bridge Sensors
  • Offset Select: Coarse and Fine
  • Gain Select: Coarse and Fine
  • Bridge Fault Monitor
  • Input Mux for Lead Swap
  • Over/Under Scale Limits
  • DOUT/VOUT Clamp Function
  • Seven Banks OTP Memory
  • One-Wire Digital UART Interface
  • Operating Voltage: +2.7V to +5.5V
  • Temperature Range: –40°C to +125°C
  • MSOP-10 and 3mm × 4mm DFN-10 Packages

View more

Parametrics Compare all products in Programmable & variable gain amplifiers (PGA/VGA)

 
PGA/VGA
Number of Channels (#)
Vs (Min) (V)
Vs (Max) (V)
Slew Rate (Typ) (V/us)
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
PGA308
PGA    
2    
2.7    
5.5    
0.6    
-40 to 125    
VSON | 10
VSSOP | 10    
10VSON: 12 mm2: 3 x 4 (VSON | 10)
10VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 10)