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PGA308AQDGSRQ1 Datasheet(PDF) 9 Page - Texas Instruments |
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PGA308AQDGSRQ1 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 26 page 1 2 3 4 5 10 9 8 7 6 V REF V OUT V FB V SJ V IN2 D /V OUT CLAMP 1W GND V S V IN1 PGA308 1 2 3 4 5 10 9 8 7 6 V REF V OUT V FB V SJ V IN2 D /V OUT CLAMP 1W GND V S V IN1 PGA308 PGA308-Q1 www.ti.com SBOS599A – MARCH 2012 – REVISED MARCH 2012 PIN CONFIGURATIONS DGS PACKAGE DRK PACKAGE MSOP-10 3x4 DFN-10 (TOP VIEW) (TOP VIEW) PIN DESCRIPTIONS PIN # NAME DESCRIPTION Dual-use pin: Output voltage clamp limit for VOUT or programmable digital output. The output voltage clamp function is for use in multiple supply systems where the PGA308-Q1 may be at VS = +5V and the system analog-to-digital converter (ADC) is powered at +3V. Setting VCLAMP to +3.2V prevents 1 DOUT/VCLAMP over-voltage and latch-up on the system ADC input. VCLAMP may be set through a resistor divider from VS. If configured for digital output, the DOUT function allows for configuration plus calibration of a sensor module either through the One-Wire interface (1W pin) or as a permanently configured module through the power-on reset (POR) OTP memory setting. One-Wire interface program pin. UART interface for digital calibration of the PGA308-Q1 over a single 2 1W wire. Can be connected to VOUT for a three terminal (VS, GND, VOUT) programmable sensor assembly. 3 GND Ground. 4 VS +Voltage supply. Signal input voltage 1. Connect to + or – output of the sensor bridge. Internal multiplexer can change 5 VIN1 connection internally to front-end PGA. Signal input voltage 2. Connect to + or – output of the sensor bridge. Internal multiplexer can change 6 VIN2 connection internally to front-end PGA. Output amplifier summing junction. Use for output amplifier compensation when driving large capacitive 7 VSJ loads (> 200pF) and/or for using external gain setting resistors for the output amplifier. VOUT feedback pin. Voltage feedback sense point for over-/under-scale limit circuitry. If internal gain set resistors for the output amplifier are used, this pin is also the voltage feedback sense point for the 8 VFB output amplifier. VFB in combination with VSJ allows for use of external filter and protection circuits without degrading the PGA308-Q1 VOUT accuracy. VFB must always be connected to either VOUT or the point of feedback for VOUT if external filtering is used. 9 VOUT Analog output voltage of conditioned sensor. Reference voltage input pin. VREF is used for coarse offset adjust and Zero DAC. VREF or VS may be 10 VREF individually selected for over-/under-scale threshold reference and fault monitor comparator reference. Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): PGA308-Q1 |
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