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Analog Devices Inc. LT6600CS8-15#PBF
- Part No.:
- LT6600CS8-15#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT6600CS8-15#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,035
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Product details
Overview
LT6600CS8-15#PBF from Analog Devices (acquired Linear Technology) is a fully differential amplifier with integrated 4th-order Chebyshev 15MHz lowpass antialiasing filter, operating from single 3V/5V or dual ±5V supplies. It delivers 76dB SNR at 3V with 2VP-P output, −0.5dB to +0.5dB passband gain flatness up to 260kHz, and supports programmable differential gain via two external resistors. It is used in high-speed ADC front-ends for cellular base stations and medical imaging systems.
For engineers reviewing the LT6600CS8-15#PBF datasheet, LT6600CS8-15#PBF pinout, LT6600CS8-15#PBF application, or LT6600CS8-15#PBF equivalent, key selection criteria include its 15MHz cutoff with 0.5dB ripple, input-referred noise of 109μVRMS (10kHz–15MHz), distortion performance (−86dBc 2nd harmonic @1MHz, 3V), SO-8 pin compatibility with standalone diff-amps, and VOCM/VMID common-mode control architecture.
Technical Context
The LT6600CS8-15#PBF integrates a proprietary differential amplifier stage followed by a 4th-order continuous-time lowpass filter, both optimized for minimal signal degradation. Its internal architecture eliminates need for external precision components to set bandwidth or passband ripple - the 15MHz cutoff and 0.5dB Chebyshev ripple are factory-trimmed and fixed.
It features dual independent common-mode control: VMID (Pin 7) sets 1st-stage output common mode, while VOCM (Pin 2) programs final differential output common mode voltage. Both pins support external biasing or mid-supply connection, enabling seamless interfacing with ADC reference voltages across 3V, 5V, and ±5V supply configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Filter Cutoff Frequency | 15MHz - fixed internal cutoff; defines Nyquist zone boundary for 80MHz-sampled ADCs without external RC networks. |
| Passband Ripple | ±0.5dB - ensures amplitude consistency across full passband, critical for accurate signal reconstruction in test equipment. |
| SNR (3V, 2VP-P) | 76dB - measured in-band signal-to-noise ratio; enables detection of sub-mV signals in high-resolution data acquisition. |
| Input-Referred Noise | 109μVRMS (10kHz–15MHz) - determines minimum resolvable differential input signal under full bandwidth operation. |
| Distortion (1MHz) | −86dBc (2nd), −90dBc (3rd) @3V - low harmonic generation preserves spectral purity for RF sampling and communications applications. |
| Supply Range | 3V to 11V total - supports single 3V/5V or dual ±5V operation; enables direct use with low-voltage ADCs and mixed-signal SoCs. |
| Gain Programming | Two external RIN resistors - sets differential gain as 536Ω/RIN; allows precise scaling (e.g., 1×, 2×, 4×) without op-amp feedback redesign. |
Pinout & Package
LT6600CS8-15#PBF is housed in an 8-lead plastic SOIC (SO-8, narrow 0.150") package with standard JEDEC MS-012AC footprint. Thermal pad on Pin 6 (V–) is fused to lead frame for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ (Pin 1) | Differential input terminal | Accepts one side of differential or single-ended input via external RIN; DC gain = 536Ω/RIN. |
| VOCM (Pin 2) | Output common-mode reference | Sets average voltage of OUT+ and OUT−; high-impedance input; bypass with 0.01μF to ground if not tied to VMID. |
| V+ (Pin 3) | Positive supply rail | Connect to 3V/5V or +5V rail; requires 0.1μF ceramic bypass capacitor placed near pin. |
| OUT− (Pin 4) | Negative differential output | Delivers filtered, amplified inverted signal; drives 100Ω load or 50pF capacitance directly. |
| OUT+ (Pin 5) | Positive differential output | Delivers filtered, amplified non-inverted signal; complementary to OUT−; forms true differential pair. |
| V− (Pin 6) | Negative supply rail / thermal pad | Ground for single supply; −5V for dual supply; fused to lead frame for θJA = 100°C/W (standard layout). |
| VMID (Pin 7) | Internal mid-supply reference | Biased at VS/2; sets 1st-stage common mode; must be bypassed with 0.01μF ceramic capacitor to V−. |
| IN− (Pin 8) | Differential input terminal | Accepts opposite side of differential input; matched to IN+ for balanced gain and CMRR >64dB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated antialiasing filter | Eliminates need for external passive LC or active Sallen-Key stages - reduces BOM count and board area in ADC driver designs. |
| Programmable differential gain | Set precisely via two identical external RIN resistors; avoids trimming errors and simplifies gain calibration in production test. |
| Adjustable output common mode | VOCM pin enables direct matching to ADC input common-mode range (e.g., 0.9V, 1.65V, 2.5V), preventing clipping or headroom loss. |
| Low-voltage 3V operation | Maintains 76dB SNR and −86dBc distortion at 3V supply - supports energy-efficient portable and battery-powered instrumentation. |
| SO-8 pin compatibility | Direct drop-in replacement for discrete differential amplifiers (e.g., LT1994, AD813x family), enabling legacy design upgrades without PCB rework. |
Applications
| Cellular Base Station Receiver | High-Speed Test Equipment |
|---|---|
Use Scenario: Digitizing IF signals from RF downconverters in LTE/5G macrocell receivers prior to digital demodulation. IC Role / Device Role / Timing Role: Antialiasing filter and differential driver for 80MSPS ADCs; provides 15MHz bandlimiting and level-shifting to match ADC common-mode input. Use Value: Enables clean undersampling of 10.7MHz IF with 76dB SNR and <0.5dB passband ripple - preserves EVM and adjacent channel power ratio (ACPR) in deployed radios. | Use Scenario: Signal conditioning path in automated test equipment (ATE) for validating high-speed DACs and RF transceivers. IC Role / Device Role / Timing Role: Precision differential driver with known group delay and flat gain response up to 15MHz; interfaces between arbitrary waveform generator and DUT. Use Value: Delivers <1ns gain-phase variation across passband and −86dBc distortion - ensures measurement fidelity for harmonics and intermodulation testing. |
| Medical Ultrasound Imaging | Industrial Data Acquisition |
Use Scenario: Front-end filtering and amplification of echo return signals from piezoelectric transducers before digitization. IC Role / Device Role / Timing Role: Low-noise, low-distortion analog front-end (AFE) stage; conditions wideband acoustic signals (1–15MHz) for beamforming processors. Use Value: 109μVRMS input-referred noise and 15MHz cutoff preserve time-of-flight resolution and contrast-to-noise ratio (CNR) in B-mode imaging. | Use Scenario: Isolating and conditioning sensor outputs (e.g., strain gauges, RTDs) in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Differential signal conditioner with programmable gain and common-mode rejection; rejects noise from industrial 24VDC field wiring. Use Value: 64dB CMRR and adjustable VOCM enable robust operation in electrically noisy environments while maintaining 16-bit effective resolution. |
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 |
|---|---|---|---|
| LTC1566-1 | 2.3MHz lowpass filter, lower bandwidth; no integrated differential amplifier; requires external gain stage. | Targeted at lower-frequency sensor signal chains (<3MHz), not RF or high-speed ADC interfaces. | Select when system bandwidth requirement is ≤2.3MHz and separate gain control is preferred. |
| AD8138ARZ | Standalone differential amplifier only; no integrated filter; higher 350MHz GBW but no antialiasing capability. | Requires external passive RC or active filter for antialiasing; increases component count and layout sensitivity. | Select when full flexibility in filter design is needed or when operating beyond 15MHz passband. |
Compared with LTC1566-1 and AD8138ARZ, the LT6600CS8-15#PBF uniquely combines fixed 15MHz antialiasing and differential gain in one SO-8 package - reducing design complexity and improving phase matching over discrete solutions, especially in space-constrained 80MSPS ADC front-ends.
Availability
LT6600CS8-15#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, medical imaging, high-speed test equipment, and industrial data acquisition requiring stable component supply and guaranteed −40°C to +85°C operation.
Supply support for LT6600CS8-15#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 industrial, automotive, communications, and healthcare markets.
The LT6600CS8-15#PBF belongs to Linear Technology's high-speed signal conditioning product line, designed specifically to simplify high-fidelity ADC/DAC interface design by integrating precision filtering and differential drive functions into compact, thermally robust packages.
FAQ
What is the exact cutoff frequency and passband ripple of the LT6600CS8-15#PBF filter?
The LT6600CS8-15#PBF features a fixed 15MHz cutoff frequency with a 0.5dB Chebyshev passband ripple. This specification is internally trimmed and guaranteed across temperature; no external components affect cutoff or ripple. Measured gain deviation is ±0.1dB up to 1.5MHz and ±0.4dB at 7.5MHz relative to DC, confirming tight passband flatness essential for measurement accuracy.
Can the LT6600CS8-15#PBF operate from a single 3V supply, and what performance is specified at that voltage?
Yes, the LT6600CS8-15#PBF is fully specified for single 3V operation. At 3V supply, it delivers 76dB SNR with 2VP-P output, −86dBc 2nd-harmonic distortion at 1MHz, and maintains 0.5dB passband ripple up to 15MHz. Power supply current is 35mA typical, and differential output swing reaches 3.75VP-P, making it suitable for low-power portable instrumentation.
How is differential gain programmed on the LT6600CS8-15#PBF, and what resistor values are commonly used?
Differential gain on the LT6600CS8-15#PBF is set by two identical external resistors (RIN) connected to IN+ and IN−, using the formula Gain = 536Ω / RIN. Common values include 536Ω (gain = 1×), 267Ω (gain = 2×), and 133Ω (gain = 4×). The datasheet confirms 11.5dB gain (3.74×) with RIN = 133Ω at 3V, matching theoretical calculation within tolerance.
What is the function of the VOCM and VMID pins on the LT6600CS8-15#PBF, and how should they be configured?
VOCM (Pin 2) sets the final differential output common-mode voltage; VMID (Pin 7) sets the first-stage common mode. For simplicity, tie VOCM to VMID to set output common mode to mid-supply (e.g., 1.5V on 3V). If a different level is needed (e.g., 0.9V for ADC interface), drive VOCM from a low-impedance source. VMID must always be bypassed with ≥0.01μF ceramic capacitor to V−.
Is the LT6600CS8-15#PBF pin-compatible with other differential amplifiers, and which packages does it support?
Yes, the LT6600CS8-15#PBF uses an industry-standard 8-lead SOIC (SO-8, narrow 0.150") package and is explicitly designed to be pin-compatible with standalone differential amplifiers such as the LT1994 and AD813x series. Its pinout matches common diff-amp layouts: IN+, IN−, V+, OUT−, OUT+, V−, VMID, VOCM - enabling drop-in replacement without PCB modification.
LT6600CS8-15#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:
- 35 µA
- Voltage - Input Offset:
- 10 mV
- Current - Supply:
- 38mA
- 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
LT6600CS8-15#PBF FAQ
1.How can I place an order for LT6600CS8-15#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6600CS8-15#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 LT6600CS8-15#PBF reliable?
The price and inventory of LT6600CS8-15#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6600CS8-15#PBF is usually 5 days.
3.What payment methods are accepted for LT6600CS8-15#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6600CS8-15#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6600CS8-15#PBF?
LT6600CS8-15#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6600CS8-15#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 LT6600CS8-15#PBF?
For technical support, including LT6600CS8-15#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6600CS8-15#PBF requirements.
6.How does Aetrix verify that LT6600CS8-15#PBF is sourced from the original manufacturer or authorized distributors?
All LT6600CS8-15#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 LT6600CS8-15#PBF meets industry standards.
7.What is the process for return or replacement of LT6600CS8-15#PBF?
All LT6600CS8-15#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6600CS8-15#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 LT6600CS8-15#PBF part is unused and in its original packaging.
Return procedure for LT6600CS8-15#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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