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Analog Devices Inc. LT6604CUFF-15#TRPBF
- Part No.:
- LT6604CUFF-15#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Amplifiers
- Package:
- 34-WFQFN Exposed Pad
- Datasheet:
-
LT6604CUFF-15#TRPBF.pdf
- Description:
- IC OPAMP DIFF 2 CIRCUIT 34QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,022
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Product details
Overview
LT6604CUFF-15#TRPBF from Analog Devices (formerly Linear Technology) is a dual, fully differential amplifier with integrated 4th-order 15MHz lowpass filters, designed as a matched-channel ADC driver and antialiasing filter. It delivers 76dB SNR at 3V supply, 2VP-P output, ±0.06dB gain matching and <1° phase matching at 12MHz, and supports adjustable output common-mode voltage for direct interfacing to high-speed SAR and pipeline ADCs.
For engineers reviewing the LT6604CUFF-15#TRPBF datasheet, LT6604CUFF-15#TRPBF pinout, LT6604CUFF-15#TRPBF application, or LT6604CUFF-15#TRPBF equivalent, key selection criteria include guaranteed channel-to-channel gain/phase matching over temperature, resistor-programmable differential gain (536Ω/RIN), 3V/5V/±5V supply flexibility, and QFN-34 package thermal performance for high-density signal chain layouts.
Technical Context
The LT6604CUFF-15#TRPBF integrates two independent, matched analog signal chains - each comprising a differential input stage, proprietary 4th-order lowpass filter approximating Chebyshev response, and differential output stage - sharing only the V– rail. Its architecture eliminates external passive filtering while preserving signal integrity via on-die resistor matching and low-noise op-amp design.
Gain is set per channel by identical external RIN resistors (e.g., 536Ω for unity gain), with VOCM pins enabling precise output common-mode voltage control (1.0V to 3.0V range at 3V supply). The device operates across –40°C to 85°C (I-grade) or 0°C to 70°C (C-grade); this part is C-grade, specified over 0°C to 70°C with full performance characterization in that range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Filter Cutoff | 15MHz, 4th-order Chebyshev-approximate lowpass response - provides sharp roll-off for antialiasing before ADC sampling. |
| Signal-to-Noise Ratio | 76dB at 3V supply, 2VP-P output - enables high-resolution digitization of low-amplitude signals without external amplification. |
| Channel Matching | ±0.06dB gain match and <1° phase match at 12MHz - ensures coherent dual-channel acquisition in I/Q or time-interleaved systems. |
| Output Swing | 4.5VP-P differential (3V supply), 4.75VP-P (5V supply) - supports full-scale drive into modern 1.8V/2.5V ADC inputs with headroom. |
| Input Referred Noise | 109μVRMS (10kHz–15MHz, RIN=536Ω) - sets fundamental noise floor for precision baseband signal conditioning. |
| Distortion @ 1MHz | –86dBc 2nd harmonic, –90dBc 3rd harmonic (2VP-P, 3V, 800Ω load) - preserves spectral purity in wideband communications and instrumentation. |
| Supply Range | 3V to 11V single supply, or ±5V dual supply - allows operation from low-power battery rails up to industrial 5V systems. |
Pinout & Package
LT6604CUFF-15#TRPBF uses a 34-lead (4mm × 7mm) plastic QFN package with exposed pad (Pin 35) connected to V–. The package features optimized thermal resistance (θJA = 34°C/W) and requires soldering the exposed pad to PCB ground plane for electrical stability and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +INA, –INA (Pins 2, 4) | Channel A differential input | Accepts differential or single-ended input via matched RIN; DC gain = 536Ω/RIN. |
| VOCMA (Pin 6) | Channel A output common-mode reference | High-impedance input setting +OUTA/–OUTA average voltage; bypass with 0.01μF to ground if tied to VMIDA. |
| VMIDA (Pin 34) | Channel A first-stage common-mode bias | Internally biased at mid-supply (2.5V at 5V); sets common-mode level for internal filter stage; 5.5kΩ impedance. |
| +OUTA, –OUTA (Pins 27, 29) | Channel A differential output | Drives 100Ω or 50pF loads directly; short-circuit current limit >±40mA per pin. |
| +INB, –INB (Pins 10, 12) | Channel B differential input | Functionally identical to Channel A inputs; independent gain programming via separate RIN. |
| VOCMB (Pin 14) | Channel B output common-mode reference | Same function as VOCMA but for Channel B; can be tied to VMIDB or driven externally. |
| V– (Pins 7, 24, 31, 32, 35) | Negative power supply / ground | All five pins connect to same internal node; Pin 35 (exposed pad) must be soldered to PCB ground plane. |
| V+A, V+B (Pins 25, 17) | Positive supply for Channels A and B | Separate pins allow localized bypassing; require 0.1μF ceramic capacitor from each to V–. |
Key Features
| Feature | Design Value |
|---|---|
| Dual matched filter-amplifier channels | Guaranteed <1° phase and ±0.06dB gain matching at 12MHz enables coherent dual-channel signal processing without calibration. |
| Resistor-programmable gain | DC gain = 536Ω/RIN per channel - supports flexible gain settings (e.g., 1×, 2×, 4×) using standard 1% resistors without redesign. |
| Adjustable output common-mode voltage | VOCM pins accept 1.0V–3.0V (3V supply) to align differential outputs with ADC input range - eliminates level-shifting circuitry. |
| Low distortion at high frequency | –63dBc 2nd harmonic at 10MHz (2VP-P, 3V) - maintains signal fidelity in wireless infrastructure and test equipment front-ends. |
| Wide supply compatibility | Specified for 3V, 5V, and ±5V operation - simplifies reuse across legacy 5V and modern low-voltage systems. |
Applications
| Wireless Baseband I/Q Processing | High-Speed Data Acquisition |
|---|---|
Use Scenario: Conditioning I and Q baseband signals prior to digitization in LTE/5G radio transceivers. IC Role / Device Role / Timing Role: Dual-channel antialiasing filter and differential ADC driver with matched group delay. Use Value: Preserves phase coherence between I/Q paths (<1° mismatch) and suppresses out-of-band interferers above 15MHz before ADC sampling. | Use Scenario: Driving dual 16-bit+ SAR ADCs in automated test equipment requiring synchronized sampling. IC Role / Device Role / Timing Role: Matched-channel signal conditioner providing simultaneous, low-noise, low-distortion inputs to parallel ADCs. Use Value: Enables sub-LSB matching between channels without post-acquisition correction, reducing system calibration overhead. |
| Medical Ultrasound Beamforming | Network Analyzer Front-End |
Use Scenario: Filtering and amplifying echo return signals from phased-array transducers before digitization. IC Role / Device Role / Timing Role: Low-noise, high-linearity dual-channel analog front-end with programmable gain for dynamic range optimization. Use Value: 76dB SNR and –90dBc 3rd harmonic at 1MHz support detection of weak echoes amid strong near-field reflections. | Use Scenario: Differential stimulus/response conditioning in RF vector network analyzers using 50Ω instruments. IC Role / Device Role / Timing Role: High-fidelity differential interface translating 50Ω SE source/load to balanced 800Ω differential load. Use Value: Integrated 15MHz filter replaces discrete LC networks, reducing layout sensitivity and improving measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual differential amplifier plus filter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6604IUFF-15#TRPBF | Identical functionality and pinout; rated for –40°C to 85°C operating range vs. 0°C to 70°C for LT6604CUFF-15#TRPBF. | Suitable for extended-temperature industrial or automotive environments where C-grade thermal margin is insufficient. | Select when full –40°C to 85°C specification compliance is required; otherwise LT6604CUFF-15#TRPBF offers cost advantage for commercial-temperature designs. |
| ADA4940-2ACPZ-R7 | High-speed dual differential ADC driver (no integrated filter); 1.2GHz GBW, 110dB crosstalk rejection, but requires external RC filter for antialiasing. | Better suited for >50MHz bandwidth applications where programmable filtering is not needed or is implemented digitally. | Choose when higher bandwidth (>20MHz) or lower power (20mA/ch vs. 39mA/ch) is prioritized over integrated analog filtering. |
Compared with LT6604IUFF-15#TRPBF and ADA4940-2ACPZ-R7, the LT6604CUFF-15#TRPBF uniquely combines guaranteed channel matching, integrated 15MHz antialiasing, and 3V operation in a single QFN package - making it optimal for cost-sensitive, space-constrained, and thermally stable commercial-grade data acquisition systems.
Availability
LT6604CUFF-15#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure baseband processing, medical imaging front-ends, and test equipment requiring stable component supply with consistent parametric performance across production lots.
Supply support for LT6604CUFF-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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed through the acquisition of Linear Technology in 2017.
The LT6604 family was developed by Linear Technology specifically for precision, low-noise, dual-channel signal conditioning in high-speed data conversion systems - emphasizing matched performance, integrated filtering, and flexible common-mode control.
FAQ
What is the operating temperature range for LT6604CUFF-15#TRPBF?
The LT6604CUFF-15#TRPBF is specified over 0°C to 70°C ambient temperature. While it is designed and characterized to perform reliably within the extended –40°C to 85°C range, only the 0°C to 70°C specifications are guaranteed and tested. For full –40°C to 85°C compliance, the LT6604IUFF-15#TRPBF variant should be selected instead.
How is gain programmed on the LT6604CUFF-15#TRPBF?
Gain on the LT6604CUFF-15#TRPBF is set per channel using two identical external resistors (RIN) connected to +IN and –IN pins. The differential DC gain equals 536Ω divided by RIN. For example, 536Ω resistors yield unity gain; 268Ω yields 2× gain. This resistor-programmable architecture avoids trimming or digital configuration while maintaining channel matching.
Can LT6604CUFF-15#TRPBF drive ADCs directly without external level-shifting?
Yes. The LT6604CUFF-15#TRPBF supports direct ADC interfacing via its VOCM pins, which allow precise adjustment of the differential output common-mode voltage (e.g., 1.65V for 3.3V ADCs). When VOCM is tied to VMID, the output common mode automatically centers at mid-supply, eliminating the need for external level-shifting circuitry in most single-supply systems.
What is the maximum differential output swing for LT6604CUFF-15#TRPBF at 3V supply?
At 3V supply, the LT6604CUFF-15#TRPBF delivers a guaranteed minimum differential output swing of 3.75VP-P (typical 4.5VP-P) between +OUT and –OUT pins when VOCM is properly configured. This swing is measured with VOCM shorted to VMID and accounts for internal headroom - sufficient to drive most 16-bit+ SAR and pipeline ADCs with full-scale utilization.
Does LT6604CUFF-15#TRPBF require external filtering for antialiasing?
No. The LT6604CUFF-15#TRPBF integrates a 4th-order, 15MHz lowpass filter per channel with Chebyshev-approximate response - designed explicitly to serve as an analog antialiasing filter ahead of ADCs. External filtering is unnecessary unless tighter stopband attenuation or different cutoff frequency is required, in which case the internal filter can be bypassed using alternate configurations.
LT6604CUFF-15#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 34-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Differential
- Applications:
- Driver
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 34-QFN (4x7)
LT6604CUFF-15#TRPBF FAQ
1.How can I place an order for LT6604CUFF-15#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6604CUFF-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 LT6604CUFF-15#TRPBF reliable?
The price and inventory of LT6604CUFF-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 LT6604CUFF-15#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6604CUFF-15#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6604CUFF-15#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6604CUFF-15#TRPBF?
LT6604CUFF-15#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6604CUFF-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 LT6604CUFF-15#TRPBF?
For technical support, including LT6604CUFF-15#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6604CUFF-15#TRPBF requirements.
6.How does Aetrix verify that LT6604CUFF-15#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6604CUFF-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 LT6604CUFF-15#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6604CUFF-15#TRPBF?
All LT6604CUFF-15#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6604CUFF-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 LT6604CUFF-15#TRPBF part is unused and in its original packaging.
Return procedure for LT6604CUFF-15#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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