CMX970Q7 Equivalent & Substitute Parts

Part Overview

The CMX970Q7 is an IF/RF quadrature demodulator IC manufactured by CML Microcircuits, designed for RF signal demodulation across the 20MHz to 300MHz frequency range. This 16-VQFN surface mount device delivers 56dB gain with a 10dB noise figure and operates from a 3V to 3.6V supply at 15mA current consumption. The device maintains Active product status with ROHS3 compliance and MSL 3 rating.

Substitute parts become necessary when addressing specific application requirements including extended frequency coverage, alternative packaging constraints, different supply voltage ranges, or inventory availability across manufacturing partners.

Substiute Parts

CMX970Q7

CML MicrocircuitsIn Stock: 763CMX970Q7 Datasheet

Current PartRFQ

AD8348ARUZ

Analog Devices Inc.In Stock: 5210AD8348ARUZ Datasheet

MFR RecommendedRFQ

ADL5387ACPZ-R7

Analog Devices Inc.In Stock: 1631ADL5387ACPZ-R7 Datasheet

MFR RecommendedRFQ

MAX2306ETI+

Analog Devices Inc./Maxim IntegratedIn Stock: 731MAX2306ETI+ Datasheet

MFR RecommendedRFQ

TRF371135IRGZT

Texas InstrumentsIn Stock: 2141TRF371135IRGZT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMX970Q7 is determined by the following critical parameters: demodulator function, RF frequency coverage overlap, supply voltage compatibility, package form factor, and product status. The substitute parts listed below are qualified alternatives based on these criteria.

Critical Substitution Parameters:

• Functional classification as RF demodulator IC
• RF frequency range overlap with 20MHz ~ 300MHz specification
• Surface mount packaging capability
• Active product status
• ROHS3 compliance

The four substitute parts represent different trade-offs across frequency coverage, gain characteristics, power consumption, and package configurations. Selection depends on specific application frequency requirements and PCB layout constraints.

Parameter Comparison

Engineering Selection Recommendations

AD8348ARUZ provides extended RF frequency coverage to 1GHz with improved supply voltage flexibility (2.7V ~ 5.5V range). This part maintains comparable noise figure performance at 10.75dB and supports the 20MHz ~ 300MHz operating band of the CMX970Q7. Package transition from 16-VQFN to 28-TSSOP requires PCB layout modification. MSL 1 rating eliminates moisture sensitivity constraints.

ADL5387ACPZ-R7 extends frequency coverage to 2GHz and offers the widest LO frequency range (100MHz ~ 4GHz). This device requires 4.75V ~ 5.25V supply voltage and exhibits higher current consumption at 180mA. The 24-LFCSP package maintains similar footprint dimensions to the original 16-VQFN. MSL 3 rating matches the CMX970Q7 specification.

MAX2306ETI+ maintains the tightest frequency alignment with the CMX970Q7, covering 40MHz ~ 300MHz with identical upper frequency limit. This part delivers superior noise figure performance at 6.36dB and operates from a single 2.7V supply. The 28-TQFN package (5x5) requires increased PCB area compared to the original 16-VQFN. MSL 1 rating provides unlimited moisture exposure tolerance.

TRF371135IRGZT addresses high-frequency applications requiring 1.7GHz ~ 6GHz coverage. This device delivers 45dB gain with 370mA current consumption and requires 4.5V ~ 5.5V supply voltage. The 48-VQFN package (7x7) represents the largest footprint among substitute options. MSL 2 rating provides one-year moisture exposure tolerance.

All substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the CMX970Q7.

Frequently Asked Questions (FAQ)

Q: Can the AD8348ARUZ directly replace the CMX970Q7 without circuit modification?

A: The AD8348ARUZ is functionally equivalent for RF demodulation within the 20MHz ~ 300MHz band. However, the package transition from 16-VQFN to 28-TSSOP requires PCB layout redesign. Supply voltage compatibility exists within the overlapping 3V ~ 3.6V range, but the wider 2.7V ~ 5.5V specification of the AD8348ARUZ may require power supply circuit evaluation.

Q: Which substitute part offers the best noise figure performance?

A: The MAX2306ETI+ delivers the lowest noise figure at 6.36dB compared to the CMX970Q7 specification of 10dB. This performance advantage applies specifically within the 40MHz ~ 300MHz frequency range where both devices operate.

Q: What are the package footprint implications of each substitute?

A: The CMX970Q7 uses a 16-VQFN (4x4) package. The AD8348ARUZ transitions to 28-TSSOP, the ADL5387ACPZ-R7 uses 24-LFCSP (4x4), the MAX2306ETI+ requires 28-TQFN (5x5), and the TRF371135IRGZT uses 48-VQFN (7x7). Package selection directly impacts PCB area allocation and routing complexity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all four substitute parts maintain ROHS3 compliance matching the CMX970Q7 specification.

Q: Which substitute part has the lowest power consumption?

A: The CMX970Q7 operates at 15mA, the lowest among all listed devices. Among substitutes, the AD8348ARUZ consumes 58mA, the MAX2306ETI+ requires 41.5mA, the ADL5387ACPZ-R7 draws 180mA, and the TRF371135IRGZT requires 370mA.

Q: Can the TRF371135IRGZT operate within the 20MHz ~ 300MHz band?

A: No. The TRF371135IRGZT is specified for 1.7GHz ~ 6GHz operation and does not cover the 20MHz ~ 300MHz frequency range of the CMX970Q7. This part addresses applications requiring extended high-frequency coverage beyond the original specification.

Q: What is the significance of MSL rating differences?

A: The CMX970Q7 and ADL5387ACPZ-R7 both carry MSL 3 rating, allowing 168 hours of moisture exposure. The AD8348ARUZ and MAX2306ETI+ have MSL 1 rating with unlimited exposure tolerance. The TRF371135IRGZT carries MSL 2 rating for one-year exposure tolerance. MSL selection impacts storage and handling procedures in manufacturing environments.