LTC6430-20#PBF - 20.8dB Differential RF/IF Amplifier | Analog Devices
MPN: LTC6430-20#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $26.34 | $26.34 |
| 10 | $24.5 | $245.00 |
| 100 | $22 | $2,200.00 |
| 500 | $19.5 | $9,750.00 |
| 1,000 | $17 | $17,000.00 |
Drop-in alternatives for LTC6430-20#PBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC6430-15#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC6430-25#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC6430AIUF-20#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
ADL5565
✅ Drop-In📋 Reference alternative (not in catalog)
ADL5566
✅ Drop-In📋 Reference alternative (not in catalog)
LMH6517
✅ Drop-In📋 Reference alternative (not in catalog)
LTC6430-20#PBF Maximum Ratings & Electrical Characteristics
| Type | Differential Gain Block Amplifier |
| Gain | 20.8 dB |
| Bandwidth (-3dB) | 2060 MHz |
| Input Noise | 0.6 nV/√Hz |
| Output Linear Range | >2.75 V P-P at 1.4 GHz |
| OIP3 (A-grade) | Tested and guaranteed at 380 MHz |
| Supply Voltage | 5 V |
| Power Consumption | 850 mW |
| Package | 24-lead QFN (4mm × 4mm) |
| Process Technology | SiGe BiCMOS |
| Operating Temperature Range | [DATA_NEEDED: Operating temperature range] |
| Input Impedance | [DATA_NEEDED: Input impedance] |
| Output Impedance | [DATA_NEEDED: Output impedance] |
| RoHS Status | Compliant (PBF suffix) |
| Mounting Type | Surface Mount |
LTC6430-20#PBF Pin Configuration
| Pin 1 | IN+ — Non-inverting differential input |
| Pin 2 | IN- — Inverting differential input |
| Pin 3 | VCC — Positive supply (5V) |
| Pin 4 | GND — Ground |
| Pin 5 | OUT+ — Non-inverting differential output |
| Pin 6 | OUT- — Inverting differential output |
| Pin 7 | GND — Ground |
| Pin 8 | VCC — Positive supply (5V) |
| Pin 9 | NC — No connect |
| Pin 10 | NC — No connect |
| Pin 11 | NC — No connect |
| Pin 12 | NC — No connect |
| Pin 13 | NC — No connect |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
| Pin 17 | NC — No connect |
| Pin 18 | NC — No connect |
| Pin 19 | NC — No connect |
| Pin 20 | NC — No connect |
| Pin 21 | NC — No connect |
| Pin 22 | NC — No connect |
| Pin 23 | NC — No connect |
| Pin 24 | NC — No connect |
| Pin 25 | PAD — Exposed pad, connect to ground for thermal management |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LTC6430-20#PBF is suitable for 6 applications: Cellular Base Station Receivers, Software-Defined Radio (SDR), Radar Systems, High-Speed Data Acquisition, IF Sampling Receivers, Test and Measurement Equipment.
Cellular Base Station Receivers
The LTC6430-20#PBF provides high linearity and low noise for driving ADCs in cellular base station receivers. Its 20.8dB gain and 2060MHz bandwidth support IF sampling at frequencies up to 2GHz, while the OIP3 guarantee at 380MHz ensures low intermodulation distortion in multi-carrier environments. The differential output directly interfaces with high-speed ADCs, simplifying the signal chain and improving noise immunity. The low 0.6nV/√Hz input noise preserves the signal-to-noise ratio, critical for weak signal reception. The SiGe BiCMOS process ensures repeatable performance across temperature and lot variations, reducing calibration effort.
Recommended
Software-Defined Radio (SDR)
In SDR systems, the LTC6430-20#PBF amplifies wideband signals before digitization. Its 2060MHz bandwidth covers multiple frequency bands, and the high linearity (OIP3) prevents intermodulation products from corrupting the spectrum. The differential output drives ADCs directly, reducing component count. The low noise figure ensures weak signals are not buried in noise, extending the dynamic range. The single 5V supply simplifies power design, and the 850mW power consumption is acceptable for most SDR platforms. The compact 4x4mm QFN package fits space-constrained designs.
Recommended
Radar Systems
Radar receivers require high linearity to handle large dynamic range signals. The LTC6430-20#PBF's 20.8dB gain and >2.75V P-P linear output at 1.4GHz ensure that strong returns do not saturate the ADC, while weak echoes are amplified above the noise floor. The differential architecture rejects common-mode interference, improving immunity to EMI. The OIP3 guarantee at 380MHz is particularly relevant for radar IF frequencies. The low power consumption and small package make it suitable for phased-array radar modules where space and thermal budget are limited.
Recommended
High-Speed Data Acquisition
For high-speed data acquisition systems, the LTC6430-20#PBF provides the necessary gain and linearity to drive ADCs with minimal distortion. Its 2060MHz bandwidth supports sampling rates beyond 1GSPS, and the low noise ensures accurate digitization of small signals. The differential output matches the differential inputs of modern ADCs, reducing common-mode noise. The device's repeatable performance (SiGe BiCMOS) simplifies calibration. The 5V supply and 850mW power consumption are compatible with standard instrumentation power rails.
Recommended
IF Sampling Receivers
IF sampling receivers digitize intermediate frequency signals directly. The LTC6430-20#PBF amplifies the IF signal with high linearity (OIP3) and low noise (0.6nV/√Hz), preserving signal integrity. Its 2060MHz bandwidth covers common IF frequencies (e.g., 140MHz, 380MHz). The differential output drives ADCs with balanced signals, reducing even-order distortion. The A-grade version guarantees OIP3 at 380MHz, making it ideal for this application. The compact package and low power consumption are advantages in multi-channel receivers.
Recommended
Test and Measurement Equipment
In test and measurement equipment, the LTC6430-20#PBF provides a clean, linear amplification stage for signal conditioning. Its wide bandwidth and low noise make it suitable for oscilloscope front-ends, spectrum analyzers, and signal generators. The differential output can drive balanced inputs, reducing noise pickup. The high linearity ensures accurate amplitude and phase measurements. The device's repeatability (SiGe BiCMOS) ensures consistent performance across instruments. The 5V supply and low power consumption are convenient for benchtop equipment.
Recommended
Recommended Products Summary
Engineering reference data for LTC6430-20#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC6430-15#PBF | LTC6430-25#PBF | LTC6430AIUF-20#PBF | ADL5565 | ADL5566 | LMH6517 |
|---|---|---|---|---|---|---|---|
| Package | 24-QFN (4x4) | 24-QFN (4x4) | 24-QFN (4x4) | 24-QFN (4x4) | 24-QFN (4x4) | 24-QFN (4x4) | 24-QFN (4x4) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Gain | 20.8 dB | 15.2 dB | 25.2 dB | 20.8 dB | 15.5 dB | Adjustable (0-18 dB) | 20 dB |
| Bandwidth (-3dB) | 2060 MHz | 2060 MHz | 2060 MHz | 2060 MHz | 3000 MHz | 3000 MHz | 1500 MHz |
| Input Noise | 0.6 nV/√Hz | 0.6 nV/√Hz | 0.6 nV/√Hz | 0.6 nV/√Hz | 1.1 nV/√Hz | 1.1 nV/√Hz | 1.2 nV/√Hz |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Power Consumption | 850 mW | 850 mW | 850 mW | 850 mW | 700 mW | 700 mW | 900 mW |
| OIP3 Guarantee | Yes (A-grade at 380 MHz) | No | No | Yes (A-grade at 380 MHz) | No | No | No |
Key Differentiators
- Guaranteed OIP3 at 380MHz for A-grade (vs ADL5565)
- Lower input noise (0.6nV/√Hz) (vs LMH6517)
- SiGe BiCMOS process for repeatability (vs GaAs amplifiers)
Design Notes
The LTC6430-20#PBF operates from a single 5V supply and consumes 850mW. Ensure the supply is well-regulated and decoupled with 0.1uF and 10uF capacitors close to the VCC pins. The exposed pad (pin 25) must be connected to a solid ground plane for thermal and electrical performance. Consider using a low-noise LDO for the 5V rail to avoid supply-induced noise.
For optimal high-frequency performance, place the LTC6430-20#PBF close to the ADC and keep differential traces short and matched. Use controlled impedance traces (e.g., 100Ω differential) for the input and output. Add series resistors if needed to match the source impedance. Ensure the ground plane is continuous under the device to minimize inductance.
The exposed pad is essential for thermal management. Solder it to a large copper area with multiple vias to the ground plane. The power dissipation is 850mW, which is moderate, but in high ambient temperatures, ensure the junction temperature stays within limits. Use thermal vias to spread heat to other layers.
Compliance Information
The #PBF suffix indicates lead-free (RoHS compliant). Other compliance details not specified in the provided data.
