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MAX2309EGI
Electronics Part Number
MAX2309EGI-WXManufacturer
Texas Instruments
MAX2309EGI
Description
I/Q demodulator plus IF VGA for CDMAInventory
937 Pcs New Original In Stock
RF demodulator IC, 28-VFQFN exposed pad. 40-300MHz. Precision quadrature demodulation, low noise. Ideal for wireless receivers, RF front ends.
Quantity
Minimum 1
Minimum 1
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Basic cost: USD 70.00
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Technical Specifications
Category
Power Management (PMIC), V/F and F/V Converters
Manufacturer
Texas Instruments
Packaging
-
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Series
-
Base Product Number
LM2907
Product Status
Obsolete
Type
Frequency to Voltage
Supplier Device Package
8-PDIP
Frequency - Max
10 kHz
Linearity
±0.3%
Full Scale
-
Data Sheet Document (D)
Datasheets
Download LM2907N-8 Product Specification (PDF)
HTML Datasheet
LM2907N-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
Standard Package
40
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Frequently Asked Questions (FAQ)
What are the key design risks when using the LM2907N-8 in new designs given its obsolete status and
The LM2907N-8 is marked as obsolete by Texas Instruments and is non-RoHS compliant, posing significant long-term supply and regulatory risks. If your design requires compliance with environmental directives (e.g., RoHS, REACH), this component may not be suitable for commercial or industrial products destined for Europe or similar markets. While LM2907N-8/NOPB is a potential substitute, availability is limited to existing stock. For long-term reliability and compliance, consider redesigning with modern drop-in replacements like the LM2917 series, which offer similar frequency-to-voltage functionality with full RoHS compliance and active production support.
How can I ensure stable output linearity in the LM2907N-8 when operating near its 10 kHz maximum fre
To maintain the specified ±0.3% linearity of the LM2907N-8 near 10 kHz, carefully control input signal conditioning and timing components. Use low-tolerance resistors (1% or better) and low-temperature-coefficient capacitors in the timing network to minimize drift. Additionally, ensure the input waveform has a clean, fast rise time—use a Schmitt-trigger buffer if needed. Power supply noise can degrade linearity, so decouple VCC with a 0.1 µF ceramic capacitor close to the 8-PDIP package. Operating consistently above 9 kHz may reveal sensitivity to component aging; periodic calibration or guard-banding the input range is recommended.
Can the LM2907N-8 reliably replace a Hall-effect-based tachometer signal conditioner in automotive R
The LM2907N-8 can be used in tachometer applications, especially where frequency output from variable reluctance sensors needs conversion to analog voltage. Its built-in charge pump and open-collector output make it well-suited for gear-tooth sensing. However, ensure input signal amplitude exceeds 50 mV RMS and use hysteresis via external feedback to reject noise in electrically noisy automotive environments. Compared to modern integrated solutions like the TC9400, the LM2907N-8 lacks ESD protection and operates only up to 10 kHz, limiting use in high-RPM engines. Designers should validate signal integrity across temperature and implement overvoltage protection on inputs.
What are the through-hole design considerations for thermal and mechanical reliability when integrat
The 8-DIP (0.300", 7.62mm) through-hole package of the LM2907N-8 offers good mechanical stability but limited thermal dissipation (approximately 600 mW in free air). In industrial environments with frequent thermal cycling, ensure adequate PCB land patterns and use socketing only if absolutely necessary—soldered joints offer superior long-term reliability. Avoid placing near high-power components to prevent localized heating. Since the device is non-RoHS, lead-free rework processes may require adjusted soldering profiles. Inspect solder joints periodically in high-vibration applications to mitigate creep or fatigue failures.
How does the LM2907N-8 compare to the LM2907N-8/NOPB in terms of performance and interchangeability
The LM2907N-8 and LM2907N-8/NOPB are functionally identical in electrical performance and pinout, both featuring the same 10 kHz max frequency and ±0.3% linearity in the 8-PDIP package. The key difference is that the NOPB version is lead-free and RoHS compliant, making it preferable for repairs where environmental compliance matters. However, both are obsolete, so sourcing from authorized distributors is critical to avoid counterfeit parts. When replacing in legacy systems, verify that the NOPB variant’s slightly different thermal characteristics during soldering don’t impact adjacent components during rework.
What are the key design risks when using the LM2907N-8 in new designs given its obsolete status and
The LM2907N-8 is marked as obsolete by Texas Instruments and is non-RoHS compliant, posing significant long-term supply and regulatory risks. If your design requires compliance with environmental directives (e.g., RoHS, REACH), this component may not be suitable for commercial or industrial products destined for Europe or similar markets. While LM2907N-8/NOPB is a potential substitute, availability is limited to existing stock. For long-term reliability and compliance, consider redesigning with modern drop-in replacements like the LM2917 series, which offer similar frequency-to-voltage functionality with full RoHS compliance and active production support.
How can I ensure stable output linearity in the LM2907N-8 when operating near its 10 kHz maximum fre
To maintain the specified ±0.3% linearity of the LM2907N-8 near 10 kHz, carefully control input signal conditioning and timing components. Use low-tolerance resistors (1% or better) and low-temperature-coefficient capacitors in the timing network to minimize drift. Additionally, ensure the input waveform has a clean, fast rise time—use a Schmitt-trigger buffer if needed. Power supply noise can degrade linearity, so decouple VCC with a 0.1 µF ceramic capacitor close to the 8-PDIP package. Operating consistently above 9 kHz may reveal sensitivity to component aging; periodic calibration or guard-banding the input range is recommended.
Can the LM2907N-8 reliably replace a Hall-effect-based tachometer signal conditioner in automotive R
The LM2907N-8 can be used in tachometer applications, especially where frequency output from variable reluctance sensors needs conversion to analog voltage. Its built-in charge pump and open-collector output make it well-suited for gear-tooth sensing. However, ensure input signal amplitude exceeds 50 mV RMS and use hysteresis via external feedback to reject noise in electrically noisy automotive environments. Compared to modern integrated solutions like the TC9400, the LM2907N-8 lacks ESD protection and operates only up to 10 kHz, limiting use in high-RPM engines. Designers should validate signal integrity across temperature and implement overvoltage protection on inputs.
What are the through-hole design considerations for thermal and mechanical reliability when integrat
The 8-DIP (0.300", 7.62mm) through-hole package of the LM2907N-8 offers good mechanical stability but limited thermal dissipation (approximately 600 mW in free air). In industrial environments with frequent thermal cycling, ensure adequate PCB land patterns and use socketing only if absolutely necessary—soldered joints offer superior long-term reliability. Avoid placing near high-power components to prevent localized heating. Since the device is non-RoHS, lead-free rework processes may require adjusted soldering profiles. Inspect solder joints periodically in high-vibration applications to mitigate creep or fatigue failures.
How does the LM2907N-8 compare to the LM2907N-8/NOPB in terms of performance and interchangeability
The LM2907N-8 and LM2907N-8/NOPB are functionally identical in electrical performance and pinout, both featuring the same 10 kHz max frequency and ±0.3% linearity in the 8-PDIP package. The key difference is that the NOPB version is lead-free and RoHS compliant, making it preferable for repairs where environmental compliance matters. However, both are obsolete, so sourcing from authorized distributors is critical to avoid counterfeit parts. When replacing in legacy systems, verify that the NOPB variant’s slightly different thermal characteristics during soldering don’t impact adjacent components during rework.
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Sep 15 2026
