My Inquiry
My Account
Analog Devices Inc. LT6600CDF-2.5#PBF
- Part No.:
- LT6600CDF-2.5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT6600CDF-2.5#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,186
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT6600CDF-2.5 from Analog Devices (formerly Linear Technology) is a fully differential amplifier integrated with a 4th-order 2.5MHz Chebyshev lowpass antialiasing filter, delivering ±0.6dB passband ripple, 86dB SNR at 3V/1VRMS, and programmable differential gain via two external resistors. It operates from single 3V or 5V supplies and sets output common mode voltage via VOCM pin for direct interfacing with ADCs.
For engineers reviewing the LT6600CDF-2.5 datasheet, LT6600CDF-2.5 pinout, LT6600CDF-2.5 application, or LT6600CDF-2.5 equivalent, key selection criteria include its fixed 2.5MHz cutoff, input-referred noise of 51μVRMS (10kHz–2.5MHz), distortion performance (95dBc 2nd harmonic @1MHz), DFN-12 package thermal characteristics, and VOCM/VMID biasing requirements for precision signal chain design.
Technical Context
The LT6600CDF-2.5 implements a proprietary internal architecture combining two cascaded differential amplifiers with a 4th-order passive-active filter stage to achieve sharp roll-off without external components. Its gain is set by external RIN resistors (e.g., 1580Ω for unity gain), while cutoff frequency and passband ripple are factory-trimmed and temperature-stable.
It features independent control of first-stage (VMID) and second-stage (VOCM) common mode voltages, enabling flexible level-shifting for DAC output smoothing or ADC driver applications. The DFN-12 package includes an exposed V– pad for thermal management, with θJA = 43°C/W when properly soldered to PCB ground plane.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cutoff Frequency | 2.5MHz - fixed Chebyshev filter response with –3dB point and ±0.6dB passband ripple. |
| SNR | 86dB - measured at 3V supply, 1VRMS output, enabling high-resolution data acquisition. |
| Input-Referred Noise | 51μVRMS - integrated over 10kHz–2.5MHz bandwidth with RIN = 1580Ω, critical for low-level signal integrity. |
| Distortion (2nd Harmonic) | 95dBc - at 1MHz, 1VRMS, 800Ω load, supporting clean spectral purity in baseband processing. |
| Differential Output Swing | 5.1VP-P - maximum usable swing on 3V supply, defining dynamic range headroom before clipping. |
| Supply Current | 33mA - typical at VS = 5V, determining power budget for high-speed analog front-ends. |
| Operating Temp Range | 0°C to 70°C - specified performance range for commercial-grade operation in networking and test equipment. |
Pinout & Package
The LT6600CDF-2.5 is housed in a 12-lead (4mm × 4mm) plastic DFN package with exposed V– pad (Pin 13) requiring solder connection to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ (Pin 1) | Differential Input Positive | Accepts input signal referenced to IN–; DC gain = 1580Ω/RIN; requires matched external resistor for gain setting. |
| IN– (Pin 12) | Differential Input Negative | Completes differential input pair; identical biasing and impedance as IN+ for balanced operation. |
| 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 Rail | Accepts 3V, 5V, or ±5V; requires local 0.1μF ceramic bypass to V– (Pin 9) for stability and noise suppression. |
| V– (Pins 8, 9) | Negative Supply Rail / Exposed Pad | Ground reference for single supply; exposed pad (Pin 13) must be soldered to PCB ground for thermal conduction (θJC = 4°C/W). |
| OUT+ (Pin 6) | Differential Output Positive | Filtered, amplified output; drives 100Ω + 50pF load to AC ground; swing up to 5.1VP-P on 3V supply. |
| OUT– (Pin 7) | Differential Output Negative | Complementary output to OUT+; maintains full differential signaling integrity and CMRR >63dB. |
| VMID (Pin 10) | Mid-Supply Bias Reference | Internally biased at ~VS/2; sets 1st-stage common mode; bypass to V– with 0.01μF capacitor for noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Antialiasing Filter | 4th-order Chebyshev response with fixed 2.5MHz cutoff eliminates need for external RC networks and reduces layout sensitivity. |
| Programmable Differential Gain | Set precisely via two matched external resistors (e.g., 1580Ω → unity gain); avoids gain error from internal resistor mismatch. |
| Adjustable Output Common Mode | VOCM pin enables direct matching to ADC reference voltage (e.g., 1.65V for 3.3V ADC), eliminating external level-shift circuitry. |
| Low-Voltage Operation | Full performance at 3V supply supports portable and low-power instrumentation without sacrificing SNR or distortion. |
| DFN-12 Thermal Performance | Exposed V– pad and θJA = 43°C/W enable reliable operation at 33mA supply current in compact PCB layouts. |
Applications
| High-Speed ADC Driver | DAC Output Smoothing |
|---|---|
Use Scenario: Driving the differential inputs of a 14-bit, 50MSPS ADC in a cellular basestation receiver chain where wideband noise and aliasing must be suppressed. IC Role / Device Role / Timing Role: Antialiasing filter and gain-setting differential driver; provides precise 2.5MHz bandlimiting and common-mode alignment to ADC reference. Use Value: Eliminates external filter components, reduces board area by >30%, and maintains 86dB SNR across the passband for accurate digitization. | Use Scenario: Filtering and conditioning the output of a 16-bit current-output DAC (e.g., LTC1668) in discrete multi-tone (DMT) signal generation for DSL line cards. IC Role / Device Role / Timing Role: Low-distortion smoothing filter with programmable gain; converts DAC's current output to clean, differential voltage waveform. Use Value: Suppresses DAC image energy beyond 2.5MHz while preserving baseband fidelity; measured output spectrum shows >60dB image rejection. |
| Medical Ultrasound Beamforming | Test & Measurement Signal Conditioning |
Use Scenario: Front-end signal conditioning for channelized receive paths in portable ultrasound systems requiring low-noise, wide-dynamic-range analog processing. IC Role / Device Role / Timing Role: Differential amplifier and anti-alias filter for echo return signals; interfaces directly with low-voltage ADCs operating from 3V rails. Use Value: 51μVRMS input-referred noise ensures detection of weak acoustic echoes; DFN-12 footprint enables dense channel packing. | Use Scenario: Signal path conditioning in automated test equipment (ATE) for RF component characterization, where harmonic distortion must be minimized during swept-frequency measurements. IC Role / Device Role / Timing Role: Precision differential driver with flat group delay (<3ns variation over 0–2.5MHz) and ultra-low 2nd/3rd harmonic distortion. Use Value: Enables accurate amplitude and phase measurement down to –95dBc distortion floor, meeting Class I ATE calibration requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential amplifier and antialiasing filter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6600IS8-2.5#PBF | Same core functionality and specs, but in SO-8 package with θJA = 100°C/W and extended –40°C to 85°C temp range. | Preferred for industrial environments requiring wider temperature operation and easier hand-soldering or prototyping. | Select when thermal budget allows higher junction temperature rise or when SO-8 footprint is required for legacy board compatibility. |
| ADA4940-1ARZ | High-speed differential ADC driver (1.4GHz GBW) without integrated filter; requires external RC antialiasing network. | Suitable for variable-cutoff or higher-bandwidth (>10MHz) applications where filter flexibility outweighs integration benefit. | Choose when system-level filtering must be tuned post-layout or when >2.5MHz bandwidth is needed with lower power (13.5mA vs 33mA). |
Compared with LT6600IS8-2.5#PBF, the LT6600CDF-2.5 offers superior thermal performance (θJA = 43°C/W vs 100°C/W) in a smaller footprint but lacks extended temperature qualification; versus ADA4940-1ARZ, it trades off design flexibility for guaranteed 2.5MHz antialiasing compliance and reduced BOM count.
Availability
LT6600CDF-2.5 is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging, and communications infrastructure requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LT6600CDF-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 precision instrumentation, communications, and industrial markets.
The LT6600 family was designed by ADI's legacy Linear Technology division specifically for high-fidelity signal chain applications requiring integrated filtering and differential drive-targeting ADC/DAC interface challenges in baseband and IF signal processing.
FAQ
What is the function of the VMID pin on the LT6600CDF-2.5?
The VMID pin on the LT6600CDF-2.5 is internally biased at mid-supply voltage (e.g., ~1.5V on 3V, ~2.5V on 5V) and sets the common mode voltage of the first differential amplifier stage. It must be bypassed to V– with a 0.01μF ceramic capacitor to minimize noise and distortion. While it can be overridden with an external low-impedance source, doing so requires maintaining ≥1.5V margin from V+ and V– rails. The LT6600CDF-2.5 relies on proper VMID decoupling for stable DC operating points and optimal THD performance.
Can the LT6600CDF-2.5 operate from a single 3.3V supply?
Yes, the LT6600CDF-2.5 is fully specified and characterized for operation from a single 3V or 3.3V supply, delivering 5.1VP-P differential output swing, 86dB SNR, and <0.6dB passband ripple. The VOCM and VMID pins scale accordingly (e.g., VOCM ≤ 1.65V on 3.3V), and supply current remains within 26–30mA. All electrical characteristics-including distortion (95dBc 2nd harmonic), noise (51μVRMS), and common-mode rejection (>63dB)-are validated under 3V conditions per the datasheet, making the LT6600CDF-2.5 suitable for low-voltage portable instrumentation.
How is differential gain programmed on the LT6600CDF-2.5?
Differential gain on the LT6600CDF-2.5 is programmed using two identical external resistors (RIN) connected from IN+ and IN– to the signal source. The gain equals 1580Ω/RIN - for example, 1580Ω yields unity gain, 402Ω yields 4V/V. This ratio-based method avoids errors from internal resistor mismatch and enables precise, temperature-stable gain setting. The LT6600CDF-2.5 does not require feedback resistors or op-amp configuration; gain accuracy depends solely on external RIN tolerance and matching. Layout symmetry between both RIN paths is critical to preserve CMRR and distortion performance.
What is the purpose of the exposed pad on the LT6600CDF-2.5 DFN package?
The exposed pad (Pin 13) on the LT6600CDF-2.5 DFN package is electrically connected to V– and serves as the primary thermal conduction path from the die to the PCB. It must be soldered to a solid copper pour tied to the system ground plane to achieve the specified θJA = 43°C/W. Without this connection, thermal resistance degrades to ~105°C/W, risking junction temperatures exceeding 150°C at full load. The LT6600CDF-2.5 datasheet mandates soldering the exposed pad for both thermal reliability and electrical stability-floating or unconnected pads will cause oscillation and increased distortion.
Does the LT6600CDF-2.5 support dual ±5V supplies?
Yes, the LT6600CDF-2.5 supports dual ±5V supplies, delivering 9VP-P differential output swing, –51dB gain attenuation at 12.5MHz, and 88dBc 3rd harmonic distortion at 1MHz. Its absolute maximum total supply voltage is 11V, well above the 10V span of ±5V. Key parameters-including input common mode range (–2.5V to 1.0V), VOCM operating range (–2V to 2V), and power supply current (30mA typ.)-are explicitly characterized for ±5V operation in the datasheet. The LT6600CDF-2.5 maintains full 2.5MHz filter response and low-noise performance under dual-supply conditions, making it suitable for legacy industrial and test equipment designs.
LT6600CDF-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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x4)
LT6600CDF-2.5#PBF FAQ
1.How can I place an order for LT6600CDF-2.5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6600CDF-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 LT6600CDF-2.5#PBF reliable?
The price and inventory of LT6600CDF-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 LT6600CDF-2.5#PBF is usually 5 days.
3.What payment methods are accepted for LT6600CDF-2.5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6600CDF-2.5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6600CDF-2.5#PBF?
LT6600CDF-2.5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6600CDF-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 LT6600CDF-2.5#PBF?
For technical support, including LT6600CDF-2.5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6600CDF-2.5#PBF requirements.
6.How does Aetrix verify that LT6600CDF-2.5#PBF is sourced from the original manufacturer or authorized distributors?
All LT6600CDF-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 LT6600CDF-2.5#PBF meets industry standards.
7.What is the process for return or replacement of LT6600CDF-2.5#PBF?
All LT6600CDF-2.5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6600CDF-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 LT6600CDF-2.5#PBF part is unused and in its original packaging.
Return procedure for LT6600CDF-2.5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT6600CDF-2.5#PBF Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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…
