LTC1094CJ - 8-Ch 10-Bit Serial DAS | Analog Devices
MPN： LTC1094CJ ✓ 啟用中LTC1094CJ 概覽
A data acquisition system, or DAS, is an integrated mixed-signal semiconductor that combines analog multiplexing, conversion, and a digital control or serial interface. In the hierarchy of electronic components, the LTC1094CJ belongs to the ADC family, which forms part of the broader data-converter and signal-processing category. The 10-bit ADC provides 1,024 representable digital codes, making it appropriate for monitoring applications that require moderate measurement resolution rather than high-precision laboratory conversion.
The key features of the LTC1094CJ include eight multiplexed input channels, 10-bit conversion resolution, serial I/O, and a selectable bipolar or unipolar input configuration. The switched-capacitor successive-approximation core allows the converter to combine compact implementation with practical acquisition performance. Because the multiplexer is software-configurable, a host controller can select among the available analog inputs and configure operating modes through the serial control interface.
The LTC1094 family also includes 1-, 2-, 6-, and 8-channel configurations, while the LTC1094CJ specifically provides the 8-channel option. This distinction matters when comparing the CJ suffix with other family members. The CJ version is identified as an industrial-grade, 20-terminal, through-hole ceramic DIP rather than a surface-mount package. Its 20-CERDIP format supports conventional through-hole PCB assembly and is suitable for designs that favor robust mechanical attachment over compact board area.
Typical uses include industrial process monitoring, transducer signal acquisition, laboratory measurement interfaces, environmental sensing, and embedded data-logging systems. In a multi-sensor installation, the eight-channel multiplexer can reduce the number of physical analog input connections needed by a microcontroller while retaining a common serial command and data path. The host system determines the channel sequence, acquisition timing, and interpretation of the resulting 10-bit values.
A key design consideration is the analog front-end. Sensor outputs must remain within the selected bipolar or unipolar input range, and the source impedance seen by each muxed input can affect conversion accuracy and settling time. Layout should minimize trace lengths between sensors, protection components, and the LTC1094CJ while separating digital serial activity from sensitive analog nodes. Grounding, reference decoupling, and acquisition timing should be evaluated together rather than optimized independently.
This product page combines the manufacturer product information, distributor identification, package details, and cross-reference findings into an engineering-focused description. It also identifies the verified drop-in alternative, documents replacement and selection questions, and highlights practical considerations for implementing an eight-channel serial data acquisition front end.
直接替換替代品，適用於 LTC1094CJ — 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。
LTC1094ACJ
✅ 直接替換📋 參考替代品（不在目錄中）
LTC1094CJ 最大額定值與電氣特性
| Device Type | Data Acquisition System (DAS) |
| ADC Resolution | 10 bit |
| Number of Channels | 8 channels |
| 介面類型 | Serial I/O |
| ADC Architecture | Switched-capacitor successive approximation |
| Input Multiplexer | Software-configurable analog multiplexer |
| Input Configuration | Selectable bipolar or unipolar |
| 封裝 | 20-pin CERDIP |
| 安裝類型 | Through-hole |
| Terminal Count | 20 terminals |
| Package Shape | Rectangular |
| Temperature Grade | Industrial |
| Number of Representable Codes | 1,024 codes |
| LTC1094 Family Channel Options | 1, 2, 6, and 8 channels |
| Manufacturer Lifecycle Description | Production |
LTC1094CJ rectangular 腳位配置指南
LTC1094CJ（rectangular 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： LTC1094CJ.
請參閱 資料表 以查看完整腳位配置。
典型應用
LTC1094CJ 適用於 6 應用s: Industrial Process Monitoring, Multi-Sensor Environmental Monitoring, Transducer Signal Acquisition, Laboratory Measurement Interface, Embedded Data Logging, Embedded Control and Instrumentation.
Industrial Process Monitoring
The LTC1094CJ fits industrial process monitoring where several pressure, temperature, or level signals must be measured without allocating a separate ADC channel to every sensor. Its eight multiplexed inputs let a controller select the required channel through the serial interface, while 10-bit resolution provides 1,024 representable codes for moderate process-control and diagnostic information. The industrial-grade designation and 20-pin through-hole CERDIP package also suit equipment built for conventional PCB insertion. Design the analog front end so each transducer output remains inside the selected bipolar or unipolar range, and verify acquisition timing against the sensor output impedance. Use separate analog and digital return paths to prevent multiplexer and serial transitions from disturbing low-level measurements.
Multi-Sensor Environmental Monitoring
The LTC1094CJ can consolidate an environmental station that monitors temperature, humidity, pressure, light, and air-quality sensors into one eight-channel acquisition front end. Software-configurable multiplexing allows the controller to sample sensors sequentially and associate each 10-bit result with a configured channel. This approach reduces wiring compared with separate converter inputs while retaining serial communication to a microcontroller. For low-amplitude sensor outputs, keep traces short and provide suitable conditioning before the analog inputs. Check the datasheet input range and settling requirements, and place any protection or filtering components close to the LTC1094CJ to minimize added noise and leakage.
Transducer Signal Acquisition
The LTC1094CJ is appropriate for acquiring outputs from pressure, load, displacement, and other analog transducers that can be represented by a 10-bit measurement. Eight multiplexed channels permit several transducers to share the converter and a common serial data path. The selectable bipolar and unipolar modes help match the signal polarity expected by the transducer conditioning circuit. Because source impedance affects the time required for the switched-capacitor ADC core to settle, include the sensor output resistance and selected sample timing in the system design. The 20-pin CERDIP package is particularly convenient for industrial instrumentation assembled with through-hole components.
Laboratory Measurement Interface
For laboratory instruments requiring multiple measured inputs, the LTC1094CJ provides a compact 10-bit serial acquisition subsystem with eight multiplexed channels. A microcontroller can issue channel-selection commands, initiate conversions, and read results without requiring eight parallel ADC buses. The device is best suited to measurement categories where 1,024 resolution levels provide adequate information, such as coarse status monitoring, laboratory fixtures, and calibration assistants. For precision instruments, verify the complete error budget, reference implementation, input noise, and settling behavior in the manufacturer datasheet. Place the serial interface away from high-impedance sensor nodes and use a clean, locally decoupled analog reference or supply arrangement.
Embedded Data Logging
The LTC1094CJ can serve as the analog front end of an embedded data logger that periodically records multiple plant or equipment signals. Its serial I/O reduces the number of host-controller pins, and the eight-channel multiplexer supports sequential sampling from a distributed set of sensors. The 10-bit conversion resolution is adequate for trend recording and threshold monitoring where fine measurement detail is not required. A practical implementation should pair channel selection with timestamps, perform a consistent settling interval, and calibrate each analog path. The through-hole CERDIP package supports ruggedized through-hole assembly, although board area should be reserved for the larger 20-pin footprint.
Embedded Control and Instrumentation
The LTC1094CJ is suitable for embedded control systems that need to supervise analog feedback while using a serial data-acquisition front end. Eight channels can represent sensor inputs, equipment status levels, or configurable set points, and the 10-bit result can be scaled by firmware into engineering units. The industrial temperature-grade marking supports equipment targeting industrial ambient conditions, subject to confirmation of the grade-specific operating-temperature limits. Place input filtering and protection ahead of the muxed inputs, maintain a low-impedance return path, and isolate serial clock and data routing from sensitive analog traces. The ceramic DIP construction simplifies repair and replacement in long-life instrumentation compared with a compact surface-mount package.
工程參考資料，適用於 LTC1094CJ — 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 | LTC1094ACJ |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 20-DIP (20-pin CERDIP) | 20-DIP |
| Device Type | Data Acquisition System (DAS) | Data Acquisition System (DAS) |
| ADC Resolution | 10 bit | 10 bit |
| Channel Count | 8 channels | 8 channels |
| Interface | Serial I/O | Serial I/O |
| ADC Architecture | Switched-capacitor successive approximation | Switched-capacitor successive approximation |
主要差異化特點
- Eight-channel multiplexed acquisition in one converter (對比LTC1094ACJ)
- Configurable signal-polarity acquisition (對比LTC1094ACJ)
- Serial interface reduces parallel host wiring (對比LTC1094ACJ)
設計說明
Route the eight analog inputs directly from their connector or sensor-conditioning circuits to the LTC1094CJ, keeping these traces short and away from the serial clock and data lines. Return the analog ground and digital ground through a deliberate connection strategy at the converter rather than allowing high-current return paths to share a narrow trace beneath the device. This arrangement reduces coupling from mux transitions and serial signals into the selected measurement channel.
Validate input settling with the actual sensor and protection network. The switched-capacitor successive-approximation core must be allowed to acquire each selected channel before the result is interpreted, and source impedance can materially affect that interval. Begin timing validation with the manufacturer conversion and acquisition characteristics, then add the measured output impedance, capacitor tolerances, and sampling cadence of the host controller.
Do not assume that an 8-channel part can accept eight arbitrary voltage ranges simultaneously. Select the bipolar or unipolar operating configuration and ensure every sensor remains inside the corresponding input limits, including transients and fault conditions. Use suitable clamping and filtering ahead of the inputs, and account for multiplexer switching and adjacent-channel behavior when the sensors have slow-changing, high-impedance outputs.
Reserve the correct 20-pin through-hole footprint and observe the ceramic-DIP lead geometry, row spacing, and solder-hole requirements of the selected package drawing. Place local bypass and input-conditioning components near their associated LTC1094CJ pins, while keeping the serial connector and any high-speed digital circuitry away from the analog-input region. Confirm polarity and pin numbering against the manufacturer pin-description table before fabrication.
合規資訊
The cited product and distributor records identify the LTC1094 family as production and classify the LTC1094CJ as an industrial-grade 20-pin through-hole device. No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration appears in the cited material.
