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Analog Devices Inc. LTC6432AIUF-15#TRPBF
- Part No.:
- LTC6432AIUF-15#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Amplifiers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC6432AIUF-15#TRPBF.pdf
- Description:
- IC ADC DRIVER 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,452
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Product details
Overview
LTC6432AIUF-15#TRPBF from Analog Devices is an ultra-high dynamic range SiGe differential gain block amplifier designed to drive high-resolution, high-speed ADCs in IF and RF signal chains. It delivers 15.2dB fixed power gain, 54.5dBm OIP3 at 1MHz (Grade A), and 1GHz differential bandwidth with 3.0dB noise figure at 240MHz - enabling spectrally efficient modulation and blocker-resistant receiver front-ends.
For engineers reviewing the LTC6432AIUF-15#TRPBF datasheet, LTC6432AIUF-15#TRPBF pinout, LTC6432AIUF-15#TRPBF application, or LTC6432AIUF-15#TRPBF equivalent, key selection criteria include guaranteed OIP3 at 150MHz (A-grade), internal 100Ω differential input/output matching, low 1/f noise corner down to 100kHz, and thermal stability across –40°C to 85°C case temperature.
Technical Context
The LTC6432AIUF-15#TRPBF implements a single-stage Darlington-pair input with shunt-series feedback to simultaneously achieve 100kHz–1GHz flat gain, low noise, and exceptional linearity. Its internal bias controller and temperature compensation ensure stable OIP3 and P1dB over environmental variation without external trimming.
Unlike GaAs or GaN wideband amplifiers, this SiGe device exhibits low 1/f noise and operates down to DC-coupled 100kHz applications. All A-grade units are 100% tested for OIP3 at 150MHz, and the architecture supports unconditionally stable operation with no external stabilization networks required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 15.2dB differential power gain - enables predictable signal level setting without gain-setting resistors or calibration. |
| OIP3 (Grade A) | 54.5dBm at 1MHz into 100Ω diff load - supports high-dynamic-range receivers handling strong interferers near desired signals. |
| Noise Figure | 3.0dB at 240MHz - preserves SNR in sensitive IF stages preceding high-speed ADCs. |
| Bandwidth | 100kHz to 1GHz (–3dB) - covers LTE, WiMAX, cable DOCSIS, and wideband test instrumentation bands. |
| Supply | Single 5V supply (4.75–5.25V) - simplifies power architecture and eliminates negative rails or LDOs. |
| P1dB | 22.5dBm output - delivers >2.75VP-P linear swing into 100Ω differential loads. |
| Input/Output Match | Internally matched to 100Ω differential - eliminates external matching networks and reduces layout sensitivity. |
Pinout & Package
The LTC6432AIUF-15#TRPBF is housed in a 4mm × 4mm, 24-lead plastic QFN package (UF) with exposed pad (Pin 25) soldered to PCB ground for thermal management and low-inductance grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (24) | Positive differential input | Internally biased at 2V DC; requires DC blocking capacitor for AC-coupled inputs. |
| –IN (7) | Negative differential input | Complementary to +IN; forms fully differential input pair with 100Ω impedance match. |
| +OUT (18) | Positive differential output | Requires RF choke or center-tapped transformer for DC bias feed and RF isolation. |
| –OUT (13) | Negative differential output | Complementary to +OUT; enables balanced drive of differential ADC inputs. |
| VCC (9, 22) | Positive supply | Two pins internally connected; each must be bypassed with 1000pF + 0.1µF ceramic capacitors. |
| GND (8, 17, 23, 25) | Ground reference | Exposed pad (25) is functional GND - must be soldered with multiple vias to inner ground plane. |
| +FDBK (19), –FDBK (12) | Feedback terminals | Each requires 1µF capacitor to respective output pin to extend low-frequency response below 100kHz. |
| NFILT1 (6), NFILT2 (5) | Bias supply filtering | Each requires 1µF capacitor to GND to suppress low-frequency noise on internal bias rails. |
| T_DIODE (15) | Temperature monitoring | Optional diode output - forward-biased with ≤1mA to ground; voltage correlates to die temperature. |
| DNC (1, 2, 3, 4, 10, 11, 14, 16, 20, 21) | No-connect | Must remain floating; connection degrades RF performance and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed OIP3 at 150MHz (A-grade) | All LTC6432AIUF-15#TRPBF units are 100% tested - ensures consistent linearity for production receiver calibration. |
| Internal 100Ω differential I/O match | Eliminates external matching components across 100kHz–1GHz - reduces BOM count and layout sensitivity. |
| Low 1/f noise corner | Operates down to 100kHz with minimal flicker noise - suitable for narrowband IF and direct-conversion receivers. |
| Unconditional stability | No external stabilization required - simplifies design validation and avoids oscillation risk in wideband layouts. |
| Thermal compensation | Internal bias control maintains OIP3 and P1dB across –40°C to 85°C case temperature - ensures field reliability. |
| Single 5V supply operation | Reduces system power complexity - compatible with standard digital supply rails and eliminates dual-rail regulators. |
Applications
| Communications Receiver Front-End | High-Speed ADC Driver |
|---|---|
Use Scenario: Wideband cellular base station receiver processing LTE/WiMAX signals with strong adjacent-channel interferers. IC Role / Device Role / Timing Role: Differential IF amplifier between mixer and 16-bit ADC, providing gain, impedance transformation, and blocker rejection. Use Value: 54.5dBm OIP3 at 1MHz and 47.0dBm at 150MHz enable >100dB spurious-free dynamic range (SFDR) in multi-carrier systems. |
Use Scenario: Driving the differential inputs of a 125MSPS+ pipeline ADC in radar or spectrum analyzer digitizers. IC Role / Device Role / Timing Role: Fixed-gain, low-noise buffer that preserves signal integrity and minimizes harmonic distortion before sampling. Use Value: 3.0dB NF at 240MHz and >2.75VP-P linear swing ensure full-scale utilization of ADC ENOB without clipping or intermodulation. |
| Wideband Test Instrumentation | 50Ω/75Ω Balanced IF Amplifier |
Use Scenario: Signal path gain block in vector network analyzers or spectrum analyzers requiring flat response from 100kHz to 1GHz. IC Role / Device Role / Timing Role: Precision differential gain stage with calibrated S21 and stable group delay across octaves. Use Value: ±0.3dB gain flatness from 100kHz to 400MHz and <–19dB S12 reverse isolation minimize measurement uncertainty and source pulling. |
Use Scenario: IF amplifier in broadcast equipment interfacing 75Ω CATV or 50Ω lab-grade sources via balun conversion. IC Role / Device Role / Timing Role: Impedance-adapting differential driver supporting both 50Ω and 75Ω systems through external balun selection. Use Value: Internally matched 100Ω differential I/O allows seamless integration with 1:2 or 1:1.414 baluns - eliminating discrete matching networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential IF amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH5401IRGT | 32dB gain, 1.2GHz BW, 5.5V supply, higher NF (6.5dB @ 100MHz), no internal matching - requires external 100Ω termination. | Targeted at higher-gain, lower-linearity applications where OIP3 >45dBm is sufficient and board space permits matching networks. | Select LMH5401IRGT when gain >20dB is needed and external matching is acceptable; avoid if A-grade OIP3 guarantee or 100kHz low-frequency operation is required. |
| ADL5565ACPZ-R7 | 16dB gain, 3.3V supply, 2.9GHz BW, 22dBm P1dB, 22.5dBm OIP3 @ 100MHz - significantly lower linearity than LTC6432AIUF-15#TRPBF. | Optimized for high-frequency, low-voltage portable instrumentation; not suitable for high-dynamic-range base station receivers. | Select ADL5565ACPZ-R7 only for 3.3V systems above 500MHz where moderate linearity suffices; reject for 5V, sub-200MHz, or >50dBm OIP3 requirements. |
Compared with LMH5401IRGT and ADL5565ACPZ-R7, the LTC6432AIUF-15#TRPBF uniquely combines guaranteed A-grade OIP3, internal 100Ω matching, low 1/f noise, and 100kHz–1GHz bandwidth - making it the only choice for production-grade, wideband, high-SFDR receiver designs demanding zero-matching simplicity and verified linearity.
Availability
LTC6432AIUF-15#TRPBF is available at Aetrix Electronics and suitable for communications infrastructure, test instrumentation, and high-speed data acquisition systems requiring stable component supply, guaranteed linearity performance, and long-term industrial temperature support.
Supply support for LTC6432AIUF-15#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and RF ICs, serving precision instrumentation, communications, and industrial markets since 1965.
The LTC6432AIUF-15#TRPBF belongs to the Linear Technology (acquired by Analog Devices) LTC® high-linearity amplifier family, engineered specifically for wideband differential ADC driving and IF signal chain applications demanding ultra-low distortion and guaranteed specifications.
FAQ
What is the guaranteed OIP3 performance for LTC6432AIUF-15#TRPBF?
The LTC6432AIUF-15#TRPBF is Grade A and 100% tested for OIP3 at 150MHz, with a minimum of 47.0dBm and typical 50.3dBm. At 1MHz, typical OIP3 is 54.5dBm into a 100Ω differential load. This guaranteed specification ensures consistent linearity across production lots without additional characterization.
Does LTC6432AIUF-15#TRPBF require external impedance matching networks?
No. The LTC6432AIUF-15#TRPBF features internal differential input and output matching to 100Ω across 100kHz–1GHz. External matching is unnecessary - only DC blocking capacitors, RF chokes, and feedback/filter capacitors are required per the recommended application circuit.
What is the purpose of the T_DIODE pin on LTC6432AIUF-15#TRPBF?
Pin 15 (T_DIODE) provides an optional on-die temperature-sensing diode. When forward-biased with up to 1mA current to ground, its voltage drop correlates linearly with junction temperature - enabling real-time thermal monitoring without external sensors in the LTC6432AIUF-15#TRPBF design.
Can LTC6432AIUF-15#TRPBF operate down to 100kHz with low 1/f noise?
Yes. Unlike GaAs or GaN amplifiers, the SiGe process used in LTC6432AIUF-15#TRPBF delivers low 1/f noise corner - enabling clean operation from 100kHz with minimal flicker noise. The NFILT1/NFILT2 pins further suppress low-frequency bias noise when 1µF capacitors are applied.
What package type and thermal characteristics does LTC6432AIUF-15#TRPBF use?
The LTC6432AIUF-15#TRPBF uses a 4mm × 4mm, 24-lead plastic QFN (UF) package with exposed thermal pad (Pin 25). Its θJC is 40°C/W, and the exposed pad must be soldered to the PCB ground plane with multiple vias to maintain case temperature within –40°C to 85°C under 850mW DC power dissipation.
LTC6432AIUF-15#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- ADC Driver
- Applications:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-QFN (4x4)
LTC6432AIUF-15#TRPBF FAQ
1.How can I place an order for LTC6432AIUF-15#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6432AIUF-15#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC6432AIUF-15#TRPBF reliable?
The price and inventory of LTC6432AIUF-15#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6432AIUF-15#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6432AIUF-15#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6432AIUF-15#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6432AIUF-15#TRPBF?
LTC6432AIUF-15#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6432AIUF-15#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC6432AIUF-15#TRPBF?
For technical support, including LTC6432AIUF-15#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6432AIUF-15#TRPBF requirements.
6.How does Aetrix verify that LTC6432AIUF-15#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6432AIUF-15#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC6432AIUF-15#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6432AIUF-15#TRPBF?
All LTC6432AIUF-15#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6432AIUF-15#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC6432AIUF-15#TRPBF part is unused and in its original packaging.
Return procedure for LTC6432AIUF-15#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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