參數(shù)資料
型號(hào)： PGA308AIDRKT
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQCC10
封裝： 3 X 4 MM, GREEN, PLASTIC, SON-10
文件頁數(shù)： 28/29頁
文件大?。?/td> 962K
代理商： PGA308AIDRKT
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
SBOS440B – JULY 2008 – REVISED DECEMBER 2010
www.ti.com
PIN CONFIGURATIONS
DGS PACKAGE
DRK PACKAGE
MSOP-10
3x4 DFN-10
(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 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 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 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.
8
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): PGA308
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