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MAX2309EGI-B50070
Electronics Part Number
MAX2309EGI-B50070-WXManufacturer
Texas Instruments
MAX2309EGI-B50070
Description
CDMA intermediate-frequency VGA and I/Q demodInventory
660 Pcs New Original In Stock
Quadrature demodulator IC in 28-VFQFN package. 40-300MHz. Excellent linearity and image rejection. For communication systems, IF processing.
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Technical Specifications
Category
Power Management (PMIC), V/F and F/V Converters
Manufacturer
Texas Instruments
Packaging
-
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Series
-
Base Product Number
LM2907
Product Status
Obsolete
Type
Frequency to Voltage
Supplier Device Package
8-SOIC
Frequency - Max
10 kHz
Linearity
±0.3%
Full Scale
-
Data Sheet Document (D)
Datasheets
Download LM2907MX-8 Product Specification (PDF)
HTML Datasheet
LM2907MX-8-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LM2907MX-8DKR LM2907MX-8CT LM2907MX8 LM2907MX-8TR
Standard Package
2,500
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Frequently Asked Questions (FAQ)
Can the LM2907MX-8 be used in new designs given its obsolete status, and what are the long-term supp
The LM2907MX-8 is marked as obsolete by Texas Instruments, meaning it's no longer recommended for new designs due to long-term availability risks. While current inventory shows 1,108 units available, future supply is uncertain. For mission-critical or high-volume designs, consider migrating to active alternatives like the LM2907MX-8/NOPB, which offers identical functionality but with RoHS compliance and better supply continuity. Designers should assess lifetime requirements and consider obsolescence mitigation strategies such as lifetime buys or redesign planning if using the LM2907MX-8 in new projects.
How does the LM2907MX-8 perform in noisy automotive environments, and what filtering is recommended?
The LM2907MX-8 is commonly used in automotive tachometer and speed sensing applications, where electrical noise can affect frequency-to-voltage conversion accuracy. To ensure reliable operation, use a small RC filter (e.g., 100 Ω in series with a 0.1 µF ceramic capacitor) on the input signal line to suppress high-frequency noise. Additionally, bypass the VCC pin (Pin 8) with a 0.33 µF capacitor to ground near the device. Avoid routing sensitive input traces near switching power supplies or ignition systems to minimize signal integrity issues in vehicle environments.
What are the key differences between the LM2907MX-8 and LM2907MX-8/NOPB, and can they be used interc
The LM2907MX-8 and LM2907MX-8/NOPB are functionally identical frequency-to-voltage converters with the same 10 kHz max frequency and ±0.3% linearity. The key difference is that the NOPB variant is RoHS-compliant (lead-free), while the original LM2907MX-8 is not. Both are available in 8-SOIC packages and are pin-compatible. They can typically be used interchangeably in most designs, but verify PCB solder profile compatibility and check regional regulatory requirements—especially for commercial or consumer-facing products—before substituting the LM2907MX-8 with the NOPB version.
How can I calibrate the output voltage of the LM2907MX-8 for accurate speed measurements in a tachom
To calibrate the LM2907MX-8 for accurate tachometer output, adjust the timing resistor (R1) and capacitor (C1) connected to Pin 2 and Pin 3 based on the desired full-scale frequency (e.g., 10 kHz). Use the formula VOUT = (F × R1 × C1 × 2.2) to set output scaling. For precision, use 1% tolerance metal-film resistors and stable C0G/NP0 capacitors. Apply a known frequency signal (e.g., from a function generator) and trim R1 or C1 until VOUT matches the expected value. Include a trim pot during prototyping, and verify performance across temperature ranges to account for component drift in real-world applications.
What are the thermal and reliability concerns when operating the LM2907MX-8 in engine compartment en
The LM2907MX-8 is specified for a wide operating temperature range (typically -40°C to +125°C), making it suitable for under-hood automotive use. However, prolonged exposure to high ambient temperatures may affect long-term reliability, especially if power dissipation exceeds the 8-SOIC package's thermal limits. Keep power supply voltage below 28V and minimize current draw on the output stage. Ensure adequate PCB copper area for heat dissipation and avoid placing the device near high-heat sources like exhaust manifolds. Monitor junction temperature in high-temp environments to prevent degradation of the internal Zener reference or output transistor performance over time.
Can the LM2907MX-8 be used in new designs given its obsolete status, and what are the long-term supp
The LM2907MX-8 is marked as obsolete by Texas Instruments, meaning it's no longer recommended for new designs due to long-term availability risks. While current inventory shows 1,108 units available, future supply is uncertain. For mission-critical or high-volume designs, consider migrating to active alternatives like the LM2907MX-8/NOPB, which offers identical functionality but with RoHS compliance and better supply continuity. Designers should assess lifetime requirements and consider obsolescence mitigation strategies such as lifetime buys or redesign planning if using the LM2907MX-8 in new projects.
How does the LM2907MX-8 perform in noisy automotive environments, and what filtering is recommended?
The LM2907MX-8 is commonly used in automotive tachometer and speed sensing applications, where electrical noise can affect frequency-to-voltage conversion accuracy. To ensure reliable operation, use a small RC filter (e.g., 100 Ω in series with a 0.1 µF ceramic capacitor) on the input signal line to suppress high-frequency noise. Additionally, bypass the VCC pin (Pin 8) with a 0.33 µF capacitor to ground near the device. Avoid routing sensitive input traces near switching power supplies or ignition systems to minimize signal integrity issues in vehicle environments.
What are the key differences between the LM2907MX-8 and LM2907MX-8/NOPB, and can they be used interc
The LM2907MX-8 and LM2907MX-8/NOPB are functionally identical frequency-to-voltage converters with the same 10 kHz max frequency and ±0.3% linearity. The key difference is that the NOPB variant is RoHS-compliant (lead-free), while the original LM2907MX-8 is not. Both are available in 8-SOIC packages and are pin-compatible. They can typically be used interchangeably in most designs, but verify PCB solder profile compatibility and check regional regulatory requirements—especially for commercial or consumer-facing products—before substituting the LM2907MX-8 with the NOPB version.
How can I calibrate the output voltage of the LM2907MX-8 for accurate speed measurements in a tachom
To calibrate the LM2907MX-8 for accurate tachometer output, adjust the timing resistor (R1) and capacitor (C1) connected to Pin 2 and Pin 3 based on the desired full-scale frequency (e.g., 10 kHz). Use the formula VOUT = (F × R1 × C1 × 2.2) to set output scaling. For precision, use 1% tolerance metal-film resistors and stable C0G/NP0 capacitors. Apply a known frequency signal (e.g., from a function generator) and trim R1 or C1 until VOUT matches the expected value. Include a trim pot during prototyping, and verify performance across temperature ranges to account for component drift in real-world applications.
What are the thermal and reliability concerns when operating the LM2907MX-8 in engine compartment en
The LM2907MX-8 is specified for a wide operating temperature range (typically -40°C to +125°C), making it suitable for under-hood automotive use. However, prolonged exposure to high ambient temperatures may affect long-term reliability, especially if power dissipation exceeds the 8-SOIC package's thermal limits. Keep power supply voltage below 28V and minimize current draw on the output stage. Ensure adequate PCB copper area for heat dissipation and avoid placing the device near high-heat sources like exhaust manifolds. Monitor junction temperature in high-temp environments to prevent degradation of the internal Zener reference or output transistor performance over time.
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Sep 15 2026
