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Analog Devices Inc. LT6600CS8-2.5#PBF
- Part No.:
- LT6600CS8-2.5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT6600CS8-2.5#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:183
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Product details
Overview
LT6600CS8-2.5#PBF 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 gain via two external resistors. It operates from single 3V or 5V supplies and sets output common mode voltage via VOCM pin - optimized for high-speed ADC driver and DAC smoothing in base station signal chains.
For engineers reviewing the LT6600CS8-2.5#PBF datasheet, LT6600CS8-2.5#PBF pinout, LT6600CS8-2.5#PBF application, or LT6600CS8-2.5#PBF equivalent, key selection criteria include its fixed 2.5MHz cutoff, input-referred noise of 51μVRMS (10kHz–2.5MHz), differential output swing up to 5.5VP-P on 3V, distortion performance (95dBc 2nd/88dBc 3rd at 1MHz), and SO-8 package compatibility with standard differential amplifier footprints.
Technical Context
The LT6600CS8-2.5#PBF implements a proprietary monolithic architecture combining two cascaded differential amplifiers with an internal 4th-order lowpass filter stage, eliminating need for external precision passive 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 common mode via VMID (internally biased at mid-supply) and second-stage common mode via VOCM (user-programmable), enabling precise level-shifting for ADC reference alignment. Input bias current is –35μA to –15μA, and power supply current is 26–33mA depending on supply voltage and load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cutoff Frequency | 2.5MHz - fixed internal filter bandwidth; defines Nyquist zone for 5MSPS ADCs. |
| Passband Ripple | ±0.6dB max - ensures flat group delay response critical for pulse fidelity in comms systems. |
| SNR | 86dB at 3V/1VRMS - enables high-resolution digitization of small-signal baseband waveforms. |
| Input-Referred Noise | 51μVRMS (10kHz–2.5MHz) - determines minimum detectable signal in low-level sensor or DAC output paths. |
| Differential Output Swing | 5.5VP-P on 3V supply - supports full-scale drive into 800Ω loads without clipping in portable RF front ends. |
| Harmonic Distortion | 95dBc 2nd / 88dBc 3rd at 1MHz - meets LTE/WCDMA ACLR requirements for transmitter chain filtering. |
| Supply Voltage Range | 3V, 5V, or ±5V - allows direct integration into mixed-voltage signal chains without level-shifting. |
Pinout & Package
LT6600CS8-2.5#PBF is housed in an 8-lead plastic SO (SO-8) package with exposed lead frame for thermal enhancement. Pin 6 is fused to the lead frame and must be connected to ground plane for optimal thermal performance (θJA = 100°C/W typical).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Differential Input Noninverting | Accepts one side of differential or single-ended input; forms gain-setting network with RIN. |
| 2 (NC) | No Connection | Not internally bonded; must remain unconnected per datasheet. |
| 3 (VOCM) | Output Common Mode Reference | High-impedance input setting average DC level of OUT+ and OUT–; bypass with 0.01μF to ground. |
| 4 (V–) | Negative Supply Rail | Ground reference for single-supply operation; connects to PCB ground plane for thermal conduction. |
| 5 (OUT–) | Differential Output Inverting | Delivers filtered, amplified inverted signal; drives 100Ω + 50pF loads directly. |
| 6 (OUT+) | Differential Output Noninverting | Delivers filtered, amplified noninverted signal; fused to lead frame for heat dissipation. |
| 7 (VMID) | Mid-Supply Bias Reference | Internally biased at VS/2; sets 1st-stage common mode; bypass with 0.01μF to V–. |
| 8 (IN–) | Differential Input Inverting | Accepts complementary input; matched to IN+ for common-mode rejection >63dB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Antialiasing Filter | Monolithic 4th-order Chebyshev response eliminates discrete RC ladder design effort and component tolerance sensitivity. |
| Programmable Differential Gain | Set precisely via two identical external RIN resistors (e.g., 402Ω → 4V/V); avoids gain error from mismatched feedback networks. |
| Adjustable Output Common Mode | VOCM pin enables dynamic alignment of output DC level to match ADC reference voltage (e.g., 1.65V for 3.3V ADCs). |
| Low-Voltage Operation | Full performance at 3V supply - reduces system power and enables battery-powered test equipment and portable radios. |
| SO-8 Pin Compatibility | Matches industry-standard differential amplifier pinouts (e.g., AD813x, THS45xx), simplifying board reuse and layout migration. |
Applications
| ADC Antialiasing Front End | DAC Output Smoothing |
|---|---|
Use Scenario: Filtering analog inputs prior to high-speed sampling in cellular basestation receivers or software-defined radios. IC Role / Device Role / Timing Role: Differential driver and antialiasing filter with fixed 2.5MHz cutoff, ensuring out-of-band noise does not fold into baseband. Use Value: Eliminates need for external SMT filters and matching networks, reducing BOM count and layout area while maintaining 86dB SNR. | Use Scenario: Smoothing current-output DAC signals (e.g., LTC1668) in broadband transmitters before upconversion. IC Role / Device Role / Timing Role: Low-distortion, low-noise differential reconstruction filter with programmable gain and level-shifting. Use Value: Achieves –51dB suppression at 12.5MHz while preserving 1VRMS signal integrity and enabling direct interface to RF mixers. |
| Medical Ultrasound Beamforming | High-Speed Test Equipment |
Use Scenario: Conditioning echo return signals in portable ultrasound systems requiring wide dynamic range and low phase distortion. IC Role / Device Role / Timing Role: Differential signal conditioner with rail-to-rail output swing (5.5VP-P on 3V) and <10ps group delay variation across passband. Use Value: Enables accurate time-of-flight measurements with sub-nanosecond jitter, critical for spatial resolution in beamformed arrays. | Use Scenario: Signal conditioning in automated test equipment (ATE) for high-frequency analog IC validation. IC Role / Device Role / Timing Role: Precision differential driver with 95dBc 2nd-harmonic suppression, supporting clean stimulus generation up to 2.5MHz. Use Value: Reduces measurement uncertainty in THD and SNR tests by minimizing device-induced distortion in reference signal paths. |
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 silicon, extended –40°C to 85°C operating range; higher tested temp grade. | Required for industrial or outdoor base station deployments where ambient exceeds 70°C. | Select when full industrial temperature qualification is mandatory; otherwise LT6600CS8-2.5#PBF suffices for commercial environments. |
| AD8138ARZ | Wideband differential ADC driver (320MHz GBW); no integrated filter; requires external RC antialiasing network. | Used where variable cutoff frequency or higher bandwidth (>2.5MHz) is needed; lacks monolithic filter integration. | Choose when system requires reconfigurable filtering or >10MHz signal bandwidth; accept added layout complexity and component count. |
Compared with LT6600IS8-2.5#PBF, the LT6600CS8-2.5#PBF offers identical electrical performance but is specified only from 0°C to 70°C - suitable for indoor telecom infrastructure and lab equipment. Versus AD8138ARZ, it trades bandwidth flexibility for guaranteed 2.5MHz filter response and reduced external component count.
Availability
LT6600CS8-2.5#PBF is available at Aetrix Electronics and suitable for cellular basestation front ends, medical ultrasound signal chains, high-speed test instrumentation, and portable RF transceivers requiring stable component supply with traceable sourcing and consistent parametric performance.
Supply support for LT6600CS8-2.5#PBF 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 communications, industrial, automotive, and healthcare markets.
The LT6600 family was designed by Linear Technology (acquired by ADI in 2017) specifically for high-fidelity signal conditioning in data acquisition and communication systems - integrating precision filtering and differential driving in a single monolithic solution to reduce design risk and board space.
FAQ
What is the maximum differential input voltage the LT6600CS8-2.5#PBF can handle without damage?
The LT6600CS8-2.5#PBF has absolute maximum differential input voltage of ±1.4V due to internal back-to-back diode protection. Exceeding this risks permanent damage. For safe operation, keep differential input ≤2VP-P (as characterized in Electrical Characteristics) and limit input current to <10mA using series resistors if overvoltage is possible. The part's rail-to-rail output stage supports up to 9VP-P differential swing, but input protection is limited to ±1.4V.
Can the LT6600CS8-2.5#PBF operate from a single 3.3V supply?
Yes, the LT6600CS8-2.5#PBF is fully specified and characterized for single 3V and 5V supplies - including 3.3V operation. At 3.3V, VMID is ~1.65V and VOCM must be ≤1.65V for low distortion. The datasheet confirms 86dB SNR and 5.1–5.5VP-P differential output swing under 3V conditions, and Figure 1 explicitly shows 3.3V operation with DC-coupled input and 1.65V common mode output.
How do I set unity gain on the LT6600CS8-2.5#PBF?
To set unity differential gain on the LT6600CS8-2.5#PBF, connect two identical 1580Ω resistors (RIN) from IN+ and IN– to the input signal source. The gain equation is 1580Ω/RIN, so 1580Ω yields exactly 1V/V. Use 1% metal-film resistors for best matching. Gain remains stable across temperature because the internal 1580Ω feedback resistor tracks RIN's temperature coefficient - confirmed by the 780ppm/°C gain TC specification.
Does the LT6600CS8-2.5#PBF require external compensation components?
No, the LT6600CS8-2.5#PBF requires no external compensation components. Its 4th-order 2.5MHz lowpass filter and differential amplifier stages are fully internal and factory-trimmed. Only two external RIN resistors set gain, and bypass capacitors (0.1μF on V+/V–, 0.01μF on VOCM and VMID) are required for stability and noise reduction - per Figures 1–3 and Pin Functions section. No RC networks, inductors, or op-amp compensation are needed.
What is the thermal resistance (θJA) of the LT6600CS8-2.5#PBF in standard SO-8 layout?
The LT6600CS8-2.5#PBF has θJA = 100°C/W in standard SO-8 layout with no added copper. With 330mm² copper area on top and bottom layers connected to Pin 6 (exposed lead frame), θJA improves to ~85°C/W. Table 3 in the datasheet confirms 105°C/W for zero copper and 65°C/W with 1100mm² copper - all values measured on FR-4. Junction temperature must stay ≤150°C; at 33mA and 5V, PD = 165mW, so max ambient is 85°C even with 100°C/W θJA.
LT6600CS8-2.5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SO
LT6600CS8-2.5#PBF FAQ
1.How can I place an order for LT6600CS8-2.5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6600CS8-2.5#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 LT6600CS8-2.5#PBF reliable?
The price and inventory of LT6600CS8-2.5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6600CS8-2.5#PBF is usually 5 days.
3.What payment methods are accepted for LT6600CS8-2.5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6600CS8-2.5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6600CS8-2.5#PBF?
LT6600CS8-2.5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6600CS8-2.5#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 LT6600CS8-2.5#PBF?
For technical support, including LT6600CS8-2.5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6600CS8-2.5#PBF requirements.
6.How does Aetrix verify that LT6600CS8-2.5#PBF is sourced from the original manufacturer or authorized distributors?
All LT6600CS8-2.5#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 LT6600CS8-2.5#PBF meets industry standards.
7.What is the process for return or replacement of LT6600CS8-2.5#PBF?
All LT6600CS8-2.5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6600CS8-2.5#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 LT6600CS8-2.5#PBF part is unused and in its original packaging.
Return procedure for LT6600CS8-2.5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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