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LT1009CDR
Texas Instruments
IC VREF SHUNT 0.4% 8SOIC
29042 Pcs New Original In Stock
Shunt Voltage Reference IC Fixed 2.5V V ±0.4% 10 mA 8-SOIC
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5.0 / 5.0
- (501 Ratings)
LT1009CDR
Product Overview
1326030
DiGi Electronics Part Number
LT1009CDR-DGManufacturer
Texas Instruments
LT1009CDR
Description
IC VREF SHUNT 0.4% 8SOICInventory
29042 Pcs New Original In Stock
Shunt Voltage Reference IC Fixed 2.5V V ±0.4% 10 mA 8-SOIC
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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LT1009CDR Technical Specifications
Category
Power Management (PMIC), Voltage Reference
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Reference Type
Shunt
Output Type
Fixed
Voltage - Output (Min/Fixed)
2.5V
Current - Output
10 mA
Tolerance
±0.4%
Temperature Coefficient
25ppm/°C
Noise - 0.1Hz to 10Hz
-
Noise - 10Hz to 10kHz
-
Voltage - Input
-
Current - Supply
-
Current - Cathode
400 µA
Operating Temperature
0°C ~ 70°C (TA)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
LT1009
Datasheet & Documents
HTML Datasheet
LT1009CDR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
-296-14611-1-DG
-LT1009CDRE4-NDR
-LT1009CDRG4
-LT1009CDRE4
-296-14611-1
-LT1009CDRG4-NDR
LT1009CDRE4-DG
296-14611-6-NDR
-LT1009CDR-NDR
296-14611-6
296-14611-2
LT1009CDRE4
296-14611-1
Standard Package
2,500
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
배송 과정이 투명하고 신뢰할 만해서 온라인 구매에 큰 도움이 되고 있어요.
de desembre 02, 2025
Bei DiGi Electronics merkt man sofort, dass auf Verpackungssicherheit großer Wert gelegt wird.
de desembre 02, 2025
Their reliable products are a testament to their commitment to value.
de desembre 02, 2025
The packaging was secure, and the product quality was immediately noticeable.
de desembre 02, 2025
I always find their website inviting and easy to explore.
de desembre 02, 2025
The sturdy design makes me confident in its long-term use and reliability.
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Frequently Asked Questions (FAQ)
What are the key reliability and thermal derating considerations when using the LT1009CDR in a high-ambient-temperature industrial environment near its 70°C operating limit?
The LT1009CDR is rated for 0°C to 70°C ambient temperature, and exceeding this range risks parametric drift and long-term degradation. At temperatures approaching 70°C, the ±0.4% initial accuracy and 25ppm/°C tempco can combine to shift the 2.5V output beyond acceptable limits—potentially up to ±10mV additional error. To ensure reliability, maintain adequate PCB copper pour under the 8-SOIC package for heat spreading, avoid placing heat-generating components nearby, and consider active cooling if ambient temperatures regularly exceed 60°C. For applications above 70°C, evaluate alternatives like the LM4040A25 (industrial temp range -40°C to 125°C) despite its higher cost and different pinout.
Can the LT1009CDR be used as a direct drop-in replacement for the TL431 in a 2.5V shunt reference application, and what design risks should I evaluate before making the swap?
While both the LT1009CDR and TL431 provide 2.5V shunt references, they are not direct drop-in replacements due to key differences. The TL431 requires a minimum cathode current of ~1mA to regulate properly, whereas the LT1009CDR operates down to 400µA—making it more efficient in low-current designs. However, the TL431 has adjustable output via external resistors, while the LT1009CDR is fixed at 2.5V. Also, the TL431 typically comes in a 3-pin package (e.g., SOT-23), so pin compatibility with the 8-SOIC LT1009CDR is not guaranteed. Before substituting, verify your circuit’s bias current, noise sensitivity, and PCB footprint. The LT1009CDR offers better initial accuracy (±0.4% vs. ±1–2% for TL431), but mismatched startup behavior or stability under light load could cause regulation issues.
How does the LT1009CDR’s low operating current (400µA) impact noise performance and stability in precision analog front-end circuits, and should I add external filtering?
The LT1009CDR’s low 400µA cathode current enables ultra-low-power designs but can increase susceptibility to noise and transient response degradation in high-impedance circuits. While datasheet noise specs are not provided, shunt references like the LT1009CDR typically exhibit higher broadband noise than series references due to their two-terminal nature. In sensitive applications such as ADC reference inputs or sensor signal conditioning, add a 100nF ceramic capacitor directly at the cathode node to ground to suppress high-frequency noise. For sub-Hz stability, consider a 10µF tantalum or polymer capacitor in parallel. Avoid long traces to the reference node, as parasitic inductance can interact with capacitive loads and cause oscillation—especially critical given the LT1009CDR’s lack of internal frequency compensation.
Is the LT1009CDR suitable for battery-powered IoT devices requiring long life, and how does its quiescent current compare to modern low-IQ references like the MAX6078A?
The LT1009CDR’s 400µA minimum cathode current is relatively high for modern ultra-low-power IoT applications, where many systems target total quiescent currents below 100µA. While it can still be used in moderate-duty-cycle designs, it will significantly reduce battery life compared to nano-power alternatives like the MAX6078A (6µA Iq, ±0.1% accuracy). The trade-off is that the LT1009CDR offers superior long-term stability and lower tempco (25ppm/°C vs. 50ppm/°C for MAX6078A). If your design requires high precision over temperature and can tolerate higher power consumption, the LT1009CDR remains viable. However, for coin-cell-powered sensors or remote telemetry nodes, evaluate the MAX6078AUT25+T or REF3025 for better energy efficiency, even if it means accepting slightly looser initial tolerance.
What PCB layout practices are critical to maintain the LT1009CDR’s ±0.4% accuracy in a mixed-signal design with high-speed digital components nearby?
To preserve the LT1009CDR’s tight ±0.4% output accuracy in noisy environments, follow strict layout practices: place the device as close as possible to the load (e.g., ADC reference pin), use a solid ground plane beneath the 8-SOIC package, and route the output trace away from digital lines or switching regulators. Kelvin-style connections are unnecessary due to the two-terminal shunt architecture, but minimize trace resistance between the cathode and load. Add a 10nF to 100nF low-ESR ceramic capacitor at the cathode node to suppress high-frequency coupling. Avoid vias in the reference path if possible, and isolate the reference ground return from digital return currents using a star ground or moat. These steps prevent ground bounce and EMI-induced voltage shifts that could easily exceed the 10mV error budget in precision measurement systems.
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LT1009CDR CAD Models
Texas Instruments LT1009CDR PCB symbols & footprints
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