My Inquiry
My Account
Analog Devices Inc. LT6604IUFF-15#TRPBF
- Part No.:
- LT6604IUFF-15#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Amplifiers
- Package:
- 34-WFQFN Exposed Pad
- Datasheet:
-
LT6604IUFF-15#TRPBF.pdf
- Description:
- IC OPAMP DIFF 2 CIRCUIT 34QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,182
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT6604IUFF-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 ADC driver and antialiasing filter. It delivers 76dB SNR at 3V supply, ±0.06dB gain matching and <1° phase matching between channels, and supports resistor-programmable differential gain for precision signal conditioning in high-speed data acquisition systems.
For engineers reviewing the LT6604IUFF-15#TRPBF datasheet, LT6604IUFF-15#TRPBF pinout, LT6604IUFF-15#TRPBF application, or LT6604IUFF-15#TRPBF equivalent, key selection criteria include guaranteed channel-to-channel gain/phase matching over –40°C to 85°C, adjustable output common mode voltage (VOCM), 2VP-P differential output swing on 3V supply, and QFN-34 package compatibility with high-density PCB layouts.
Technical Context
The LT6604IUFF-15#TRPBF implements two independent, matched signal paths-each comprising a differential input stage, programmable gain resistive network (536Ω/RIN), proprietary 4th-order lowpass filter approximating Chebyshev response, and differential output stage with VOCM-controlled common mode level. All internal nodes operate fully differential to suppress even-order distortion and common-mode noise.
It supports single-supply (3V/5V) and dual-supply (±5V) operation, with VMID pins internally biased at mid-supply and VOCM pins accepting external DC references to set output common mode voltage. The exposed thermal pad (Pin 35) is connected to V– and must be soldered for thermal and electrical integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Filter Cutoff | 15MHz fixed 4th-order lowpass, Chebyshev-approximated response for sharp antialiasing roll-off |
| Signal-to-Noise Ratio | 76dB typical at 3V supply, 2VP-P output - enables high-resolution digitization of small signals |
| Gain Matching | ±0.06dB max over full temperature range - ensures amplitude consistency between ADC input channels |
| Phase Matching | ±0.9° max at 12MHz - preserves time alignment for I/Q or dual-sampling applications |
| Differential Output Swing | 3.75VP-P min on 3V supply - drives modern 12–16-bit ADCs without external amplification |
| Input Referred Noise | 109μVRMS (10kHz–15MHz BW) - maintains dynamic range in wideband sensor interfaces |
| Supply Voltage Range | 3V to 11V total - supports industrial 3.3V, telecom 5V, and legacy ±5V systems |
| Operating Temp Range | –40°C to +85°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
LT6604IUFF-15#TRPBF uses a 34-lead (4mm × 7mm) plastic QFN package with exposed thermal pad (Pin 35 = V–). The package supports high thermal dissipation (θJA = 34°C/W) and compact layout for multilayer PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +INA, –INA (Pins 2, 4) | Channel A differential input | Accepts balanced or single-ended inputs via matched RIN; sets gain as 536Ω/RIN |
| +INB, –INB (Pins 10, 12) | Channel B differential input | Independent, matched path identical to Channel A for dual-signal processing |
| VOCMA, VOCMB (Pins 6, 14) | Output common mode reference | High-impedance inputs that define differential output midpoint voltage (e.g., 1.65V on 3.3V rail) |
| VMIDA, VMIDB (Pins 34, 8) | Mid-supply bias reference | Internally generated ~VS/2 node; bypassed to ground for noise suppression and stability |
| +OUTA, –OUTA (Pins 27, 29) +OUTB, –OUTB (Pins 19, 21) | Differential outputs | Drive 800Ω loads directly; support >±40mA short-circuit current per pin |
| V+A, V+B (Pins 25, 17) | Positive supply rails | Separate pins per channel reduce supply coupling and improve PSRR |
| V– (Pins 7, 24, 31, 32, 35) | Negative supply / ground | Multiple connection points including exposed pad (Pin 35) for low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| Dual matched filter-amplifier paths | Guaranteed ≤0.06dB gain and ≤0.9° phase mismatch across –40°C to 85°C enables true dual-channel coherence |
| Resistor-programmable gain | DC gain set by external RIN (e.g., 133Ω → 4×, 267Ω → 2×, 536Ω → 1×) without trimming or calibration |
| Adjustable output common mode | VOCM pins accept 0–3V reference on 3V supply, allowing direct interface to ADCs with varying VCM requirements |
| Low distortion at high frequency | –63dBc 2nd harmonic at 10MHz, 2VP-P output on 3V supply - meets LTE/WiFi baseband linearity needs |
| Robust input protection | Steering diodes on all inputs limit current to <10mA if driven beyond rails - simplifies front-end surge design |
| Thermally optimized QFN | Exposed V– pad reduces junction-to-board θJC to 2.7°C/W - sustains 48mA/channel continuous operation |
Applications
| Wireless Infrastructure Baseband | Medical Ultrasound Beamforming |
|---|---|
Use Scenario: Conditioning I/Q signals before digitization in 5G massive MIMO radio units. IC Role / Device Role / Timing Role: Dual-channel antialiasing filter and ADC driver with matched group delay. Use Value: 15MHz cutoff rejects out-of-band interferers while preserving phase coherence between I/Q paths for accurate digital beam steering. | Use Scenario: Amplifying and filtering echo return signals from phased-array transducers. IC Role / Device Role / Timing Role: Low-noise, matched dual-path analog front-end for time-aligned sampling of RF echoes. Use Value: 76dB SNR and <1° phase matching enable high-fidelity time-of-flight measurements critical for spatial resolution. |
| High-Speed Test Equipment | Industrial Data Acquisition |
Use Scenario: Driving dual-input oscilloscope or spectrum analyzer ADCs in automated test systems. IC Role / Device Role / Timing Role: Precision differential signal conditioner with calibrated gain and offset control. Use Value: Resistor-programmable gain and VOCM-adjustable output eliminate need for external level-shifting circuitry, reducing BOM count. | Use Scenario: Isolating and conditioning sensor outputs (e.g., strain gauges, RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Differential amplifier with integrated lowpass filtering for noise rejection in noisy factory environments. Use Value: 4th-order 15MHz filter attenuates switching noise from nearby SMPS while maintaining signal fidelity up to Nyquist bandwidth. |
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 |
|---|---|---|---|
| LTC6409CUD#PBF | Single-channel, 10GHz GBW amplifier with no integrated filter; requires external RC/LC antialiasing network | Lacks matched dual-path architecture and fixed 15MHz filtering - suitable only when custom filter design is acceptable | Select when higher bandwidth (>100MHz) and lower noise (1.3nV/√Hz) are prioritized over integrated filtering and channel matching |
| AD8138ARZ | Single-channel differential ADC driver with no integrated filter; 350MHz bandwidth, fixed gain = 1 or 2 | No channel matching spec, no VOCM adjustment, and no built-in lowpass response - demands external filtering and level-shifting | Choose for cost-sensitive, non-matched applications where external passive filtering is already part of the system architecture |
Compared with LTC6409CUD#PBF and AD8138ARZ, the LT6604IUFF-15#TRPBF uniquely integrates matched dual 15MHz filters with programmable gain and VOCM control - eliminating four external op-amps, eight precision resistors, and two RC networks required to replicate its functionality in discrete implementations.
Availability
LT6604IUFF-15#TRPBF is available at Aetrix Electronics and suitable for wireless infrastructure baseband, medical ultrasound beamforming, and high-speed test equipment requiring stable component supply and guaranteed –40°C to +85°C performance.
Supply support for LT6604IUFF-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, serving industrial, communications, automotive, and healthcare markets.
The LT6604 product line was developed by Linear Technology (acquired by ADI in 2017) specifically for high-fidelity, matched dual-channel signal conditioning in data converter interfaces - emphasizing low noise, precise gain/phase matching, and integrated antialiasing.
FAQ
What is the operating temperature range specified for the LT6604IUFF-15#TRPBF?
The LT6604IUFF-15#TRPBF is fully specified and tested over –40°C to +85°C, making it suitable for industrial and automotive under-hood applications. This extended temperature grade ('I' suffix) guarantees performance compliance across the full range, unlike the 'C' grade (0°C to 70°C) which is only characterized at room temperature.
How is differential gain programmed on the LT6604IUFF-15#TRPBF?
Differential gain on the LT6604IUFF-15#TRPBF is set by two identical external resistors (RIN) connected to each input pair: gain = 536Ω / RIN. For example, using 133Ω yields 4× gain, 267Ω gives 2×, and 536Ω provides unity gain. The internal 536Ω feedback resistor is laser-trimmed for accuracy, ensuring stable gain without calibration.
Can the LT6604IUFF-15#TRPBF drive an ADC with a 0.9V common mode input requirement on a 3V supply?
Yes. The LT6604IUFF-15#TRPBF's VOCMA and VOCMB pins allow direct programming of output common mode voltage. On a 3V supply, applying 0.9V to VOCMA/B sets the differential output midpoint to 0.9V - enabling seamless interface to ADCs like the AD7960 or LTC2378-20 without external level shifters.
What is the maximum differential output voltage swing achievable with the LT6604IUFF-15#TRPBF on a 3V supply?
At 3V supply, the LT6604IUFF-15#TRPBF delivers a minimum differential output swing of 3.75VP-P (measured between +OUT and –OUT), with typical performance reaching 4.5VP-P. This exceeds the 2VP-P requirement of most 12–16-bit SAR and sigma-delta ADCs, providing ample headroom for signal integrity.
Does the LT6604IUFF-15#TRPBF require external compensation components for stability?
No. The LT6604IUFF-15#TRPBF integrates fully compensated 4th-order lowpass filters and differential amplifiers - no external capacitors or resistors are needed for stability. Required external components are limited to gain-setting RIN, VOCM/VMID bypass capacitors (0.01μF ceramic), and power supply decoupling (0.1μF ceramic per V+ pin).
LT6604IUFF-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)
LT6604IUFF-15#TRPBF FAQ
1.How can I place an order for LT6604IUFF-15#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6604IUFF-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 LT6604IUFF-15#TRPBF reliable?
The price and inventory of LT6604IUFF-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 LT6604IUFF-15#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6604IUFF-15#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6604IUFF-15#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6604IUFF-15#TRPBF?
LT6604IUFF-15#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6604IUFF-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 LT6604IUFF-15#TRPBF?
For technical support, including LT6604IUFF-15#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6604IUFF-15#TRPBF requirements.
6.How does Aetrix verify that LT6604IUFF-15#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6604IUFF-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 LT6604IUFF-15#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6604IUFF-15#TRPBF?
All LT6604IUFF-15#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6604IUFF-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 LT6604IUFF-15#TRPBF part is unused and in its original packaging.
Return procedure for LT6604IUFF-15#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT6604IUFF-15#TRPBF Tags
-
TSM103WIDT
STMicroelectronics
-
LM392M/NOPB
Texas Instruments
-
MCP6S93T-E/UN
Microchip Technology
-
INA137UA/2K5
Texas Instruments
-
INA134UA/2K5
Texas Instruments
-
TS34118CS28 RDG
Taiwan Semiconductor Corporation
-
SI8920BC-IPR
Skyworks Solutions Inc.
-
ADUM3190ARQZ-RL7
Analog Devices Inc.
-
ADUM3190ARQZ
Analog Devices Inc.
-
AMC1311BDWVR
Texas Instruments
-
AMC1350DWVR
Texas Instruments
-
ADUM3190SRQZ-RL7
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
