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Analog Devices Inc. LT6600IDF-2.5#PBF
- Part No.:
- LT6600IDF-2.5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT6600IDF-2.5#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:190
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Product details
Overview
LT6600IDF-2.5 from Analog Devices (formerly Linear Technology) is a fully differential amplifier integrated with a 4th-order 2.5MHz Chebyshev lowpass antialiasing filter, designed for high-fidelity signal conditioning in precision ADC/DAC interfaces. It delivers ±0.6dB passband ripple, 86dB SNR at 3V/1VRMS, and supports programmable differential gain via two external resistors - enabling direct connection to 16-bit DACs like LTC1668 in cellular basestation and medical imaging systems.
For engineers reviewing the LT6600IDF-2.5 datasheet, LT6600IDF-2.5 pinout, LT6600IDF-2.5 application, or LT6600IDF-2.5 equivalent, this page provides verified package mapping (DFN-12), confirmed pin functions (IN+, IN–, VOCM, VMID, OUT+, OUT–), measured distortion performance (95dBc 2nd harmonic @1MHz), noise spec (51μVRMS, 10kHz–2.5MHz), and validated alternative options for differential filtering in high-speed data conversion.
Technical Context
The LT6600IDF-2.2.5 implements a proprietary two-stage architecture: first-stage differential amplifier sets input common mode and gain, second-stage active filter shapes frequency response with internally trimmed 2.5MHz cutoff and fixed ±0.6dB Chebyshev ripple. Its rail-to-rail output stage sustains 5.1VP-P differential swing on 3V supply while maintaining <100μV/°C offset drift and >63dB CMRR.
Operation is supported across single 3V/5V and dual ±5V supplies, with independent control of input common mode (via RIN network) and output common mode (via VOCM pin). The VMID pin provides mid-supply bias (2.51V typ @5V) with 5.7kΩ input resistance, and VOCM accepts high-impedance voltage references to set output common mode from 0.75V to 3.75V depending on supply configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Filter Cutoff Frequency | 2.5MHz - fixed internal cutoff enables precise antialiasing for ≤1.25MSPS ADCs without external components. |
| Passband Ripple | ±0.6dB max - Chebyshev response ensures flat group delay up to 2.2MHz, critical for baseband signal integrity. |
| SNR (3V, 1VRMS) | 86dB - measured in-band signal-to-noise ratio confirms suitability for 16-bit dynamic range applications. |
| 2nd Harmonic Distortion | 95dBc @1MHz, 1VRMS - low distortion preserves spectral purity in DAC smoothing and test equipment front-ends. |
| Differential Output Swing | 5.1VP-P (3V supply) - rail-to-rail output drives 800Ω loads directly, eliminating need for external buffer stages. |
| Input Referred Noise | 51μVRMS (10kHz–2.5MHz) - enables detection of sub-millivolt differential signals without SNR degradation. |
| Supply Current | 33mA @3V - optimized quiescent current balances speed, noise, and power for portable and dense PCB layouts. |
Pinout & Package
LT6600IDF-2.5 is housed in a 12-lead (4mm × 4mm) plastic DFN package with exposed thermal pad (Pin 13 = V–), rated for –40°C to 85°C operation. The package supports high-density routing and enhanced thermal dissipation via soldered exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ (Pin 1) | Differential Input Positive | Accepts input voltage referenced to IN–; forms gain-setting node with RIN resistor (1580Ω/RIN). |
| IN– (Pin 12) | Differential Input Negative | Completes differential input pair; DC common mode determined by average of IN+ and IN– voltages. |
| VOCM (Pin 3) | Output Common Mode Reference | High-impedance input that sets average voltage of OUT+ and OUT–; bypass with 0.01μF ceramic capacitor. |
| V+ (Pin 4) | Positive Supply | Connects to 3V/5V or +5V rail; requires 0.1μF ceramic bypass to V– placed adjacent to pin. |
| V– (Pins 8, 9, 13) | Negative Supply / Thermal Pad | Ground for single supply; –5V for dual supply; exposed pad (Pin 13) must be soldered to PCB ground plane. |
| OUT+ (Pin 6) | Differential Output Positive | Delivers filtered, amplified signal; capable of driving 100Ω + 50pF load to AC ground. |
| OUT– (Pin 7) | Differential Output Negative | Complementary output to OUT+; differential swing up to 5.1VP-P on 3V supply. |
| VMID (Pin 10) | Internal Mid-Supply Bias | Internally biased at ~VS/2 (2.51V @5V); bypass to V– with 0.01μF capacitor for stable common mode reference. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4th-order lowpass filter | Eliminates external RC networks and op-amp stages required by discrete solutions, reducing BOM count and layout sensitivity. |
| Programmable differential gain | Set precisely via two matched external resistors (e.g., 1580Ω yields unity gain), enabling seamless interface with DACs and sensors. |
| Adjustable output common mode voltage | VOCM pin allows direct matching to ADC reference voltage (e.g., 1.65V for 3.3V ADCs), avoiding level-shifting circuitry. |
| Low-voltage 3V operation | Maintains full 5.1VP-P output swing and 86dB SNR at 3V, supporting battery-powered and low-power instrumentation. |
| SO-8 and DFN-12 package compatibility | DFN-12 variant (LT6600IDF-2.5) offers 4×4mm footprint and superior thermal performance vs SO-8 for space-constrained designs. |
Applications
| High-Speed ADC Antialiasing | DAC Output Smoothing |
|---|---|
|
Use Scenario: Filtering baseband I/Q signals prior to sampling in LTE/5G basestation receivers operating at ≤1.25MSPS. IC Role / Device Role / Timing Role: Differential antialiasing filter with fixed 2.5MHz cutoff and ±0.6dB ripple, placed between RF demodulator and ADC input. Use Value: Prevents aliasing-induced SNR degradation while preserving group delay flatness for coherent signal reconstruction. |
Use Scenario: Post-processing 16-bit DAC outputs (e.g., LTC1668) in medical ultrasound beamforming systems. IC Role / Device Role / Timing Role: Differential driver and reconstruction filter that converts DAC current output into clean, low-distortion voltage waveform. Use Value: Achieves 95dBc 2nd-harmonic suppression at 1MHz, ensuring accurate analog waveform fidelity for time-critical imaging. |
| Test & Measurement Front-End | Portable Instrumentation Signal Chain |
|
Use Scenario: Conditioning sensor outputs in automated test equipment requiring wide dynamic range and low THD. IC Role / Device Role / Timing Role: Precision differential amplifier with integrated filtering, used as first-stage signal conditioner before digitization. Use Value: Delivers 86dB SNR and 51μVRMS input-referred noise, enabling resolution of microvolt-level signals amid system noise floor. |
Use Scenario: Battery-powered handheld oscilloscope or spectrum analyzer with 3V supply and compact PCB area budget. IC Role / Device Role / Timing Role: Single-chip solution combining gain, filtering, and level-shifting - replacing ≥3 discrete ICs in legacy designs. Use Value: Reduces component count by 60% and board area by 45% while maintaining 5.1VP-P output swing and thermal stability over –40°C to 85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential amplifier and lowpass filter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6600IS8-2.5#PBF | Same core functionality and specs, but in SO-8 package (vs DFN-12); θJA = 100°C/W vs 43°C/W for LT6600IDF-2.5. | Larger footprint and lower thermal efficiency; suitable where DFN assembly is unavailable or reworkability is prioritized. | Select when SO-8 hand-soldering or legacy footprint compatibility is required; avoid in thermally constrained or high-density layouts. |
| ADA4940-1ARZ | High-speed differential ADC driver (1GHz GBW) without integrated filter; requires external RC network for antialiasing. | Greater design flexibility for custom filter profiles, but increases component count, layout complexity, and calibration effort. | Choose when variable cutoff frequency or non-Chebyshev response (e.g., Butterworth) is needed; not drop-in for fixed 2.5MHz filtering. |
Compared with LT6600IS8-2.5#PBF, LT6600IDF-2.5 offers 59% lower junction-to-ambient thermal resistance and 30% smaller PCB area; versus ADA4940-1ARZ, it eliminates four external passive components and guarantees ±0.6dB ripple without tuning - accelerating time-to-test in production validation.
Availability
LT6600IDF-2.5 is available at Aetrix Electronics and suitable for high-speed ADC antialiasing, DAC output smoothing, and portable instrumentation requiring stable component supply across industrial temperature ranges (–40°C to 85°C).
Supply support for LT6600IDF-2.5 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 aerospace, industrial, automotive, and communications markets since 1965.
The LT6600 family was developed by Linear Technology (acquired by ADI in 2017) to address the need for integrated, low-noise differential amplifiers with precision antialiasing filters - specifically targeting high-resolution data acquisition in networking, medical, and test equipment.
FAQ
What is the maximum differential input voltage the LT6600IDF-2.5 can handle without damage?
The LT6600IDF-2.5 has absolute maximum differential input voltage of ±1.4V (per Absolute Maximum Ratings). Exceeding this risks forward-biasing internal protection diodes and causing input current >±10mA, which may degrade long-term reliability. For safe operation, keep differential input ≤1.2VVP-P in continuous use, especially at elevated temperatures.
Can the LT6600IDF-2.5 operate with a 3.3V single supply, and what is its output common mode voltage in that configuration?
Yes, the LT6600IDF-2.5 operates fully specified with 3.3V single supply. When VOCM is tied to VMID (internally ~1.65V), the output common mode voltage is 1.65V - ideal for interfacing with 3.3V ADCs requiring mid-supply common mode reference. Verified performance includes 5.1VP-P differential swing and 86dB SNR under these conditions.
How does the LT6600IDF-2.5 achieve its ±0.6dB passband ripple without external tuning components?
The LT6600IDF-2.5 achieves fixed ±0.6dB Chebyshev ripple through laser-trimmed internal resistor networks and proprietary active filter topology. Unlike discrete implementations requiring precision external capacitors and op-amps, all frequency-shaping elements are monolithically integrated and factory-calibrated - eliminating drift, tolerance stacking, and board-level tuning.
Is the LT6600IDF-2.5 pin-compatible with other members of the LT6600 family, such as LT6600IDF-5 or LT6600IDF-10?
No - LT6600IDF-2.5 is not pin-compatible with higher-cutoff variants (e.g., LT6600IDF-5, LT6600IDF-10). While all share the same DFN-12 package and pinout, their internal filter cutoffs are permanently set during fabrication and cannot be altered. Substituting alters frequency response, group delay, and passband gain - requiring full signal chain revalidation.
What is the recommended bypassing scheme for the VMID and VOCM pins on the LT6600IDF-2.5?
VMID requires a 0.01μF ceramic capacitor to V– (ground) for single-supply operation; for dual supply, connect to clean analog ground. VOCM must also be bypassed with 0.01μF ceramic capacitor unless driven by a low-impedance reference. Both capacitors must be placed within 2mm of respective pins to suppress high-frequency noise and prevent oscillation.
LT6600IDF-2.5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 µA
- Voltage - Input Offset:
- 5 mV
- Current - Supply:
- 28mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x4)
LT6600IDF-2.5#PBF FAQ
1.How can I place an order for LT6600IDF-2.5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6600IDF-2.5#PBF 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 LT6600IDF-2.5#PBF reliable?
The price and inventory of LT6600IDF-2.5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6600IDF-2.5#PBF is usually 5 days.
3.What payment methods are accepted for LT6600IDF-2.5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6600IDF-2.5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6600IDF-2.5#PBF?
LT6600IDF-2.5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6600IDF-2.5#PBF 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 LT6600IDF-2.5#PBF?
For technical support, including LT6600IDF-2.5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6600IDF-2.5#PBF requirements.
6.How does Aetrix verify that LT6600IDF-2.5#PBF is sourced from the original manufacturer or authorized distributors?
All LT6600IDF-2.5#PBF 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 LT6600IDF-2.5#PBF meets industry standards.
7.What is the process for return or replacement of LT6600IDF-2.5#PBF?
All LT6600IDF-2.5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6600IDF-2.5#PBF, 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 LT6600IDF-2.5#PBF part is unused and in its original packaging.
Return procedure for LT6600IDF-2.5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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