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D4C2640-2
Electronics Part Number
D4C2640-2-WXManufacturer
Texas Instruments
D4C2640-2
Description
26.5-40GHz circulator moduleInventory
35 Pcs New Original In Stock
RF and wireless technology solutions delivering efficient spectrum utilization and dependable performance; for next-gen wireless networks.
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Minimum 1
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Technical Specifications
Category
Power Management (PMIC), V/F and F/V Converters
Manufacturer
Texas Instruments
Packaging
Cut Tape (CT) & Digi-Reel®
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Series
-
Base Product Number
LM2907
Product Status
Active
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/NOPB Product Specification (PDF)
HTML Datasheet
LM2907MX-8/NOPB-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
LM2907MX8NOPB LM2907MX-8/NOPBDKR *LM2907MX-8/NOPB LM2907MX-8/NOPBCT -LM2907MX -LM2907MX-8/NOPBCT -LM2907MX-8/NOPBCT-DG LM2907MX-8/NOPBTR LM2907MX-8-NDR
Standard Package
2,500
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the LM2907MX-8/NOPB in a noisy automotive environment, a
When integrating the LM2907MX-8/NOPB in automotive applications, such as tachometric sensing, electrical noise from ignition systems or alternators can distort frequency input signals, leading to inaccurate voltage output. A key risk is false triggering or ripple on the output due to poor input conditioning. To mitigate this, always use a Schmitt-trigger buffer (e.g., 74HC14) before the LM2907MX-8/NOPB input to clean up slow or noisy signals and include a 0.1 µF ceramic bypass capacitor close to the Vcc pin. Additionally, shield the input trace and keep it away from high-current paths to maintain signal integrity within the device's 10 kHz maximum frequency range.
Can the LM2907MX-8/NOPB replace a TC9400 in a frequency-to-voltage conversion circuit, and what circ
Yes, the LM2907MX-8/NOPB can serve as a functional replacement for the TC9400 in many F-to-V applications, but several design considerations must be addressed. Unlike the TC9400, the LM2907MX-8/NOPB includes built-in hysteresis and a charge pump for zero-frequency operation, simplifying zero-scale adjustment. However, the gain and full-scale output require recalculating the timing capacitor (C1) and resistor (R1) network values for equivalent scaling. Use the formula VOUT = (Vin × F × R1 × C1 × 1.98) to match the desired output range. Also verify that input signal amplitude meets the LM2907MX-8/NOPB's minimum switching threshold (typically 50 mV overdrive).
How does temperature affect the linearity and output accuracy of the LM2907MX-8/NOPB, and what compe
The LM2907MX-8/NOPB has a specified linearity of ±0.3%, but this can degrade at temperature extremes, especially above 85°C, due to internal comparator propagation delays and charge pump variability. In precision speed-sensing applications like industrial encoders, this can introduce non-linearities even within the 10 kHz max frequency range. To maintain accuracy, use a stable reference voltage for Vcc (e.g., LM336-2.5) instead of raw supply rails, and derate operation to 7–8 kHz max at high temperatures to reduce timing jitter. Additionally, select low-temp-co components for R1 and C1 (e.g., metal film resistors, C0G/NP0 capacitors) to minimize thermal drift in the timing circuit.
What are the implications of exceeding the 10 kHz input frequency limit on the LM2907MX-8/NOPB’s rel
Exceeding the 10 kHz maximum input frequency of the LM2907MX-8/NOPB leads to incorrect output voltage scaling and potential circuit latch-up due to timing conflicts in the internal one-shot and comparator stages. While the device may not fail immediately, sustained over-frequency operation increases internal power dissipation and can cause thermal stress, especially in enclosed or high-ambient-temp environments. This results in cumulative degradation of the charge pump and reduced long-term reliability. Always limit input frequency using a preceding low-pass filter or digital prescaler (e.g., 74HC393 divide-by-8) if the source exceeds 10 kHz, ensuring robust operation within the LM2907MX-8/NOPB's design envelope.
How does the LM2907MX-8/NOPB compare to the LM2917N-8 in terms of output drive capability and suitab
The LM2907MX-8/NOPB and LM2917N-8 both feature open-collector outputs capable of sourcing up to 50 mA, making them suitable for directly driving moving-coil meters. However, the LM2907MX-8/NOPB has a more tightly controlled gain temperature coefficient due to its internal Zener clamp (1.9 V), improving stability in analog meter applications like tachometers. A key difference is that the LM2907MX-8/NOPB is surface-mount (8-SOIC), limiting heat dissipation compared to the through-hole LM2917N-8, so in high-ambient environments, a small heatsink or series resistor on the collector load may be needed for the LM2907MX-8/NOPB to avoid thermal shutdown or output sag under continuous load.
What are the key design-in risks when using the LM2907MX-8/NOPB in a noisy automotive environment, a
When integrating the LM2907MX-8/NOPB in automotive applications, such as tachometric sensing, electrical noise from ignition systems or alternators can distort frequency input signals, leading to inaccurate voltage output. A key risk is false triggering or ripple on the output due to poor input conditioning. To mitigate this, always use a Schmitt-trigger buffer (e.g., 74HC14) before the LM2907MX-8/NOPB input to clean up slow or noisy signals and include a 0.1 µF ceramic bypass capacitor close to the Vcc pin. Additionally, shield the input trace and keep it away from high-current paths to maintain signal integrity within the device's 10 kHz maximum frequency range.
Can the LM2907MX-8/NOPB replace a TC9400 in a frequency-to-voltage conversion circuit, and what circ
Yes, the LM2907MX-8/NOPB can serve as a functional replacement for the TC9400 in many F-to-V applications, but several design considerations must be addressed. Unlike the TC9400, the LM2907MX-8/NOPB includes built-in hysteresis and a charge pump for zero-frequency operation, simplifying zero-scale adjustment. However, the gain and full-scale output require recalculating the timing capacitor (C1) and resistor (R1) network values for equivalent scaling. Use the formula VOUT = (Vin × F × R1 × C1 × 1.98) to match the desired output range. Also verify that input signal amplitude meets the LM2907MX-8/NOPB's minimum switching threshold (typically 50 mV overdrive).
How does temperature affect the linearity and output accuracy of the LM2907MX-8/NOPB, and what compe
The LM2907MX-8/NOPB has a specified linearity of ±0.3%, but this can degrade at temperature extremes, especially above 85°C, due to internal comparator propagation delays and charge pump variability. In precision speed-sensing applications like industrial encoders, this can introduce non-linearities even within the 10 kHz max frequency range. To maintain accuracy, use a stable reference voltage for Vcc (e.g., LM336-2.5) instead of raw supply rails, and derate operation to 7–8 kHz max at high temperatures to reduce timing jitter. Additionally, select low-temp-co components for R1 and C1 (e.g., metal film resistors, C0G/NP0 capacitors) to minimize thermal drift in the timing circuit.
What are the implications of exceeding the 10 kHz input frequency limit on the LM2907MX-8/NOPB’s rel
Exceeding the 10 kHz maximum input frequency of the LM2907MX-8/NOPB leads to incorrect output voltage scaling and potential circuit latch-up due to timing conflicts in the internal one-shot and comparator stages. While the device may not fail immediately, sustained over-frequency operation increases internal power dissipation and can cause thermal stress, especially in enclosed or high-ambient-temp environments. This results in cumulative degradation of the charge pump and reduced long-term reliability. Always limit input frequency using a preceding low-pass filter or digital prescaler (e.g., 74HC393 divide-by-8) if the source exceeds 10 kHz, ensuring robust operation within the LM2907MX-8/NOPB's design envelope.
How does the LM2907MX-8/NOPB compare to the LM2917N-8 in terms of output drive capability and suitab
The LM2907MX-8/NOPB and LM2917N-8 both feature open-collector outputs capable of sourcing up to 50 mA, making them suitable for directly driving moving-coil meters. However, the LM2907MX-8/NOPB has a more tightly controlled gain temperature coefficient due to its internal Zener clamp (1.9 V), improving stability in analog meter applications like tachometers. A key difference is that the LM2907MX-8/NOPB is surface-mount (8-SOIC), limiting heat dissipation compared to the through-hole LM2917N-8, so in high-ambient environments, a small heatsink or series resistor on the collector load may be needed for the LM2907MX-8/NOPB to avoid thermal shutdown or output sag under continuous load.
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Sep 15 2026
