LT1230CS - Quad 100MHz Current Feedback Amplifier | ADI
MPN： LT1230CS ✓ 啟用中LT1230CS 概覽
A current-feedback amplifier is a voltage-feedback amplifier variation that controls bandwidth and stability through feedback impedance. Current-feedback amplifiers belong to the broader operational-amplifier, analog-amplifier, and semiconductor hierarchies. They are frequently selected where conventional voltage-feedback amplifiers require gain compensation across multiple closed-loop gains or where rapid large-signal response is more important than rail-to-rail input or output operation.
The verified source data identifies 100 MHz bandwidth, a 2500 V/µs slew-rate figure for the CS#TR variant, 30 mA output-drive capability, 0.04% differential gain, and 0.1° differential phase. It also reports 25 MΩ input impedance with 3 pF input capacitance. These figures make the LT1230CS appropriate for video, communications, instrumentation, and general high-speed analog interfaces when the circuit operates within the verified supply and package limits.
The CS package is a 14-pin SOIC measuring 0.154 inch, or 3.90 mm, in body width. The quad topology lets one device provide four high-speed amplifier sections while reducing package count, although common power, ground, bypass, and thermal-management requirements still apply. Supply decoupling should be placed close to the device, and unused amplifier sections should be configured according to the manufacturer guidance rather than left floating.
Typical applications include video buffering, high-speed data acquisition, communications-interface signal conditioning, active filtering, and instrumentation. The LT1230CS is particularly relevant where the required bandwidth and slew behavior outweigh the need for rail-to-rail operation. Designers should verify package pin assignments, recommended feedback networks, output loading, and supply sequencing against the official manufacturer datasheet before layout release.
This page combines verified manufacturer and distributor information with package, application, and design guidance. Because no verified internal pricing or complete pin-level datasheet extract was supplied, missing engineering values are marked rather than inferred. The result is intended to help engineers identify whether the LT1230CS fits a design before obtaining the complete official datasheet and validating the application circuit.
直接替換替代品，適用於 LT1230CS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品LT1230CS 最大額定值與電氣特性
| Amplifier Type | Current Feedback Amplifier |
| Number of Circuits | 4 circuits |
| Bandwidth | 100 MHz |
| Supply Voltage Range | 4 V to 30 V |
| Dual-Supply Range | ±2 V to ±15 V |
| Slew Rate | 2500 V/µs |
| Output Drive Current | 30 mA |
| Differential Gain | 0.04% |
| Differential Phase | 0.1° |
| Input Impedance | 25 MΩ |
| 輸入電容 | 3 pF |
| 封裝 | 14-SOIC, 0.154 inch / 3.90 mm width |
| 安裝類型 | Surface Mount |
| Temperature Grade | Commercial |
| Terminal Count | 14 terminals |
LT1230CS 14-soic, 0.154 inch / 3.90 mm width 腳位配置指南
LT1230CS（14-soic, 0.154 inch / 3.90 mm width 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LT1230CS.
請參閱 資料表 以查看完整腳位配置。
典型應用
LT1230CS 適用於 7 應用s: High-Speed Video Signal Conditioning, Communications Interface Buffering, High-Speed Data Acquisition Front End, Active Filtering and Frequency Shaping, Instrumentation and Analog Measurement, Industrial Control and Sensor Signal Paths, RF and IF Baseband Conditioning.
High-Speed Video Signal Conditioning
The LT1230CS fits video-signal conditioning stages requiring a high-bandwidth amplifier and four available channels in one 14-SOIC package. Its verified 100 MHz bandwidth provides useful margin for common video frequencies, while the current-feedback architecture is appropriate when the feedback network is selected from the manufacturer guidance. Use local supply bypassing, short traces, controlled grounding, and an output termination matched to the video load. The exact output swing and drive margin must be checked at the selected supply and channel loading. The main design trade-off is that the device is not presented as rail-to-rail, so headroom and output-range constraints remain important.
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Communications Interface Buffering
The LT1230CS can serve as a high-speed communications-interface buffer when the circuit needs more than one amplifier section and has bandwidth requirements compatible with the LT1230 family. The 100 MHz characteristic helps preserve edge information in moderate-speed signal-conditioning paths, while the quad arrangement can consolidate multiple channels. Designers should preserve the recommended current-feedback resistor values and minimize parasitic capacitance around the feedback loop. Cable or board loading must be characterized because output-drive and stability behavior can change with frequency and capacitance. The package is surface-mount SOIC, so thermal and assembly checks remain part of the design.
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High-Speed Data Acquisition Front End
For data-acquisition front ends, the LT1230CS can provide high-bandwidth amplification ahead of sampling or digitization circuits. Its 100 MHz bandwidth is substantially above the bandwidth required by many moderate-rate sensors, allowing the amplifier to avoid becoming the dominant bandwidth limitation. The current-feedback topology should be configured with manufacturer-recommended feedback impedance and verified against source capacitance, ADC input loading, and required gain. Pay particular attention to settling behavior and output drive rather than relying only on the headline bandwidth. The LT1230CS is suitable only where the supply, temperature, and output-swing requirements are acceptable.
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Active Filtering and Frequency Shaping
The LT1230CS can be used in active-filter and frequency-shaping circuits where the amplifier must preserve signal components above the bandwidth of lower-speed op amps. Its verified 100 MHz bandwidth provides a useful operating region for wideband filtering, and four circuits allow several filter stages to be consolidated. Component tolerances, parasitic capacitance, and feedback-impedance details will influence pole placement and stability, so the theoretical filter response should be checked against the actual board. Use short, symmetrical routing where possible and include adequate bypassing. Current-feedback behavior can vary with gain and feedback impedance, making datasheet validation essential.
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Instrumentation and Analog Measurement
The LT1230CS can support instrumentation and analog measurement front ends when a high-speed amplifier is needed ahead of a precision converter or control loop. The quad package allows multiple amplifier sections to be placed close to the measured circuit, reducing external routing compared with separate discrete packages. Input impedance and capacitance should be checked against the sensor or source network, and the amplifier’s offset, noise, and distortion requirements must be verified from the full datasheet. Supply layout, grounding, and feedback-return control are especially important in measurement systems. Use the device where its electrical characteristics—not only its 100 MHz bandwidth—fit the required accuracy.
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Industrial Control and Sensor Signal Paths
The LT1230CS is applicable to industrial control boards that process faster sensor signals or interface signals before filtering and conversion. The quad amplifier topology helps implement buffering, gain, or channel-conditioning functions while keeping the active device count manageable. Industrial environments may introduce long cables, ground offsets, and high common-mode slew conditions, so the input network and protection strategy must be designed carefully. Confirm the device’s commercial temperature grade and absolute maximum ratings against the actual enclosure environment. Although the 4 V to 30 V supply range is broad, output voltage headroom and load capability remain application-dependent.
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RF and IF Baseband Conditioning
The LT1230CS can be used in RF or IF baseband paths when a high-bandwidth, low-distortion amplifier is needed after mixing, filtering, or detection. The 100 MHz bandwidth is suitable for many IF-chain signal-conditioning stages, but actual passband and distortion performance must be evaluated at the operating frequency and gain. Keep the feedback loop compact, maintain controlled ground references, and terminate unused amplifier sections according to the manufacturer recommendations. The device’s current-feedback behavior should be validated with the actual source and load impedances. This application is not a claim of RF-frequency operation; it is a baseband use case based on the verified amplifier bandwidth.
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推薦產品摘要
工程參考資料，適用於 LT1230CS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Amplifier Type | Current Feedback Amplifier |
| Number of Circuits | 4 circuits |
| Bandwidth | 100 MHz |
| Supply Voltage Range | 4 V to 30 V |
| Slew Rate | 2500 V/µs for the CS#TR result |
| Output Drive Current | 30 mA |
| Input Impedance | 25 MΩ |
| Input Capacitance | 3 pF |
| Package | 14-SOIC, 0.154 inch / 3.90 mm width |
| Brand | Analog Devices |
| Temperature Grade | Commercial |
主要差異化特點
- Quad high-speed current-feedback architecture (對比LT1365CS)
- Broad supply-voltage range (對比LT1365CS)
- High-speed output-drive positioning (對比LT1365CS)
設計說明
Keep the current-feedback loop short and use the manufacturer-recommended feedback impedance. The verified LT1230CS family is specified at 100 MHz, so parasitic inductance and capacitance in the feedback path can alter stability, peaking, and effective bandwidth. Place input, output, and feedback components close to the relevant pins, avoid long copper runs beneath the loop, and test with the actual source and load. Because the supplied data does not provide a verified resistor table, do not substitute an arbitrary network without checking the official datasheet.
Place supply bypass capacitors immediately adjacent to the LT1230CS supply and ground pins, with the shortest possible return path to the device. Separate noisy input and output routing from the reference and feedback nodes, and use a continuous ground plane unless the system design requires partitioning. A 14-SOIC footprint is small enough that pin-trace inductance can become significant at high frequency. Validate the layout by measuring supply ripple and amplifier response with an oscilloscope after assembly.
Do not treat the 100 MHz bandwidth value as permission to operate every closed-loop gain or load condition without validation. Current-feedback amplifiers can have different bandwidth and stability behavior depending on feedback impedance, gain, source impedance, and capacitive loading. Also verify output swing and drive margin at the selected 4 V to 30 V supply. The verified CS#TR result lists 2500 V/µs and 30 mA, but the exact ordered part and operating conditions must be checked in the complete manufacturer data.
合規資訊
The supplied verified results do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. Compliance should be confirmed from the current manufacturer or authorized-distributor documentation for the exact orderable MPN.
