PGA309_05 BURR-BROWN [Burr-Brown Corporation], PGA309_05 Datasheet - Page 14

• Manufacturer Part Number: PGA309_05
• Description: Voltage Output PROFRAMMABLE SENSOR CONDITIONER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

PGA309
SBOS292B − DECEMBER 2003 − REVISED JANUARY 2005
Figure 1. Simplified Diagram of the PGA309 in a Typical Configuration.
14
Sensor
Bridge
R
T EMP
TEMP
TEST
V
V
V
EXC
IN1
IN2
IN
PGA309
V
O UT
Σ
Signals Mux
Temp ADC
Test Logic
Temp Sense
Offset Adjust
Internal
Coarse
Front−End PGA
(Gain 4 to 128)
Monitoring Circuit
Fault Conditions
K
V
LIN
OS
K
REF
Linearization
DAC
V
GND
Temperature ADC
Input Select
REF
A
Front− End
+5V
PGA Out
Fault
Out
V
SpanTC and OffsetTC Adjust Lookup
V
TE MP
FB
Fine Gain
Table with interpolation
Power−On
Adjust
Temperature
V
Fine Offset
GND
Reset
SD
ADC
Adjust
D
Gain
DAC
V
SA
Zero
DAC
Interface and Control
Feedback
REF
Int/Ext
Output Coarse
Gain Adjust
(2 to 9)
Over/Under−
Scale Limits
Output
Amp
IN
Circuitry
/REF
Band−Gap
Reference
Voltage
OU T
Fault Out
V
OU T
V
F B
SDA
SCL
V
V
V
PRG
OUT
FB
SJ
C
150pF
(SOT23− 5)
Two−Wire
100 Ω
100Ω
EEPROM
F
R
R
ISO
F B
+5V
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V
OU T F IL T
C
10nF
L