Datasheet

LTC2446/LTC2447
28
24467fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com © LINEAR TECHNOLOGY CORPORATION 2004
LT/LT 0905 REV A • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
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P-P
Noise 0.01Hz to 10Hz
LTC2412 2-Channel, Differential Input, 24-Bit, No Latency ∆Σ ADC 0.16ppm Noise, 2ppm INL, 200µA
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LTC2414/LTC2418 4-/8-Channel, Differential Input, 24-Bit, No Latency ∆Σ ADC 0.2ppm Noise, 2ppm INL, 200µA
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LTC2436-1 2-Channel, Differential Input, 16-Bit, No Latency ∆Σ ADC 800nV
RMS
Noise, 0.12LBS INL, 0.006LBS Offset, 200µA
LTC2440 1-Channel, Differential Input, High Speed/Low Noise, 2µV
RMS
Noise at 880Hz, 200nV
RMS
Noise at 6.9Hz,
24-Bit, No Latency ∆Σ ADC 0.0005% INL, Up to 3.5kHz Output Rate
LTC2444/LTC2445 8-/16-Channel, Differential Input, High Speed/Low Noise, 2µV
RMS
Noise at 1.76kHz, 200nV
RMS
Noise at 13.8Hz,
LTC2448/LTC2449 24-Bit, No Latency ∆Σ ADC 0.0005% INL, Up to 8kHz Output Rate
APPLICATIO S I FOR ATIO
WUUU
Figure 18. Muxed Inputs/References Enable Multiple Ratiometric Measurements with the Same Device
GND
5V
5V
(18b) Full-Bridge, Current Sense
375Ω
CH3
+–
FULL-SCALE OUTPUT = 60mV TO 140mV
SELECT FOR V > 2 • 140mV
AT MAXIMUM BRIDGE RESISTANCE
FUJIKURA FPM-120PG
(4k TO 6k IMPEDANCE)
CH2
V
REF23
+
V
REF23
–
GND
5V
5V
OMEGA 44018
LINEAR
THERMISTOR
COMPOSITE
THERMISTOR
(18a) Full-Bridge, Voltage Sense
(18d) Half-Bridge, Current Sense(18c) Half-Bridge, Voltage Sense
CH0
1µF
1µF
350Ω
LOAD CELL
+–
FULL-SCALE OUTPUT = 10mV
CH1
V
REF01
+
V
REF45
+
CH5
CH4
V
REF45
–
2850Ω
V
REF01
–
1µF
LT1790-3
GND
GND
2850Ω
12.4k
T2 T1
100Ω RTD
CH7
CH6
V
REF67
–
24467 F18
V
REF67
+
R
ILIM
GND
500Ω
SENSOR
100Ω AT 0°C
247.09Ω AT 400°C