MAX184BC/D - 12-Bit High-Speed ADC w/ External Ref | Maxim Integrated
MPN： MAX184BC/D ✗ 停產MAX184BC/D 概覽
An SAR (Successive Approximation Register) ADC is a type of data converter that performs a binary search through an internal capacitive DAC to produce a digital output in N clock cycles for an N-bit conversion. SAR ADCs sit in the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. Unlike flash ADCs, SARs trade speed for power efficiency and DC accuracy, while unlike delta-sigma ADCs, they offer low-latency conversions ideal for multiplexed acquisition.
Key features include 12-bit resolution, external reference voltage for ratiometric or absolute measurements, and tracking/hold functionality on the analog front end. The device is well suited for high-accuracy instrumentation with compact PCB area because the bare-die format eliminates package parasitics and reduces footprint versus packaged SOIC or PDIP equivalents. Per the Maxim datasheet, the converter supports standard microprocessor interfaces, simplifying connection to MCUs and DSPs.
Architecturally, the MAX184BC/D uses a charge-redistribution DAC array combined with a low-noise comparator and successive-approximation register. The external reference pin allows system designers to scale the analog input range independently of the supply rail, which is essential when digitizing signals from sensors whose full-scale output is far below +5 V. Internal clock-generation logic controls sample timing so that an external trigger is not strictly required.
Typical applications include industrial process control data acquisition boards, precision sensor front ends (load cells, pressure transducers), motor control feedback sampling, multi-channel data loggers, and digital oscilloscope front-end digitizers. The wide operating temperature range supports harsh industrial environments including factory automation and motor drive systems.
When designing with this part, ensure the reference bypass capacitors are placed close to the REF pin and that the analog input is well buffered; SAR ADCs present a switched-capacitive load at the input and are sensitive to source-impedance induced gain error. Designers should also budget for the bare-die assembly process including die attach, wire bonding, and an appropriate ceramic or metal package.
This page synthesizes distributor pricing, packaged alternatives, and practical design notes for the MAX184BC/D not found in the original Maxim datasheet - useful for engineers weighing bare-die vs packaged ADC trade-offs.
直接替換替代品，適用於 MAX184BC/D — 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。
此系列的變體
與下列產品可直接替換的同系列型號： MAX184BC/D （相同外形與佔位） — 差異在於 Mounting Type, Conversion Time, Package, RoHS Status, Resolution.
MAX184BCWI
✅ 直接替換📋 參考替代品（不在目錄中）
MAX174AEPI
✅ 直接替換聯絡詢價
查看資料表 →MAX174ACWI
✅ 直接替換聯絡詢價
查看資料表 →MAX176ACPA
✅ 直接替換聯絡詢價
查看資料表 →MAX170CCPA
✅ 直接替換聯絡詢價
查看資料表 →MAX184BC/D 最大額定值與電氣特性
| 解析度 | 12 bits |
| Converter Type | SAR (Successive Approximation) |
| Conversion Method | Successive Approximation |
| Number of Channels | 1 |
| Reference Type | External |
| Nominal Supply Voltage | +5 V |
| Negative Supply (Optional) | -12 V / -15 V (for bipolar input ranges) |
| Package Type | Bare DIE (unpackaged die) |
| Number of Terminals | 24 |
| Terminal Form | NO LEAD (die pad) |
| Package Code | DIE |
| Package Shape | RECTANGULAR |
| Temperature Grade | COMMERCIAL |
| 安裝類型 | Die attach / wire bond (hybrid/MCM) |
MAX184BC/D rectangular 腳位配置指南
MAX184BC/D（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： MAX184BC/D.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX184BC/D 適用於 6 應用s: Industrial Process Control Data Acquisition, Precision Sensor Front End (Load Cell / Pressure), Multi-Channel Data Logger, Motor Control Feedback Sampling, Digital Oscilloscope / Waveform Digitizer Front End, Portable Test and Measurement Instrumentation.
Industrial Process Control Data Acquisition
The MAX184BC/D's 12-bit SAR architecture and external reference input suit industrial process-control DAQ boards that digitize 4-20 mA loop signals and 0-10 V transducer outputs. With a +5 V nominal supply and optional -12 V/-15 V rails, the device accepts bipolar process signals directly without extra signal conditioning. Pair the MAX184BC/D with a precision reference (e.g. MAX6161) for ratio-metric scaling, and buffer inputs with op-amps like MAX4475 to drive the SAR's switched-capacitive input. The bare-die form factor enables hybrid modules that mount inside explosion-proof sensor housings where PCB area is at a premium.
推薦
Precision Sensor Front End (Load Cell / Pressure)
The MAX184BC/D is well matched to load-cell and pressure-transducer front ends where the analog signal sits in the millivolt range and demands very low integral nonlinearity. The external reference input lets designers scale the converter's full-scale range to the exact sensor sensitivity, while the SAR architecture delivers a settled 12-bit result within one conversion cycle - critical for closed-loop weighing and pressure-control loops. Combine the MAX184BC/D with an instrumentation amplifier (e.g. MAX4194) to amplify the bridge signal before digitization. The bare-die form factor helps embed the converter inside a hermetically sealed transducer housing.
推薦
Multi-Channel Data Logger
For multi-channel data loggers, the MAX184BC/D's external reference and simple parallel digital interface simplify switching between channels under MCU control. Each channel can be routed through a low-leakage MUX and the SAR's track/hold then captures the selected sample in microseconds, ideal for slow-to-medium-speed scanning loggers (battery monitoring, environmental telemetry). The +5 V single-supply operation keeps the logger power budget modest, while the bare-die format lets designers place the ADC directly next to the MUX to minimize analog trace length and pickup. Field-deployable loggers benefit from the converter's wide operating temperature range.
推薦
Motor Control Feedback Sampling
In brushless DC and stepper motor drives, the MAX184BC/D digitizes phase current and back-EMF signals for FOC (field-oriented control) algorithms that demand deterministic, low-latency conversion. The SAR architecture completes a 12-bit conversion in tens of microseconds, keeping controller interrupt latency predictable and avoiding the phase lag of slower integrating converters. Bipolar input operation from the optional -12 V or -15 V rail lets the ADC read +/-10 V analog feedback signals directly from current-sense amplifiers without level shifting. The bare-die format is convenient for in-drive hybrid modules where the converter must sit within millimeters of the IGBT/MOSFET bridge.
推薦
Digital Oscilloscope / Waveform Digitizer Front End
For digital-storage oscilloscopes and waveform digitizers, the MAX184BC/D's high-speed SAR operation captures repetitive and single-shot transients at the front end of the DSP pipeline. The external reference input ranges the digitizer to the exact amplifier output swing, while the +5 V / -15 V supply combination supports bipolar +/-10 V inputs that come straight from the oscilloscope's attenuator/amplifier chain. The bare-die format is exploited in high-end oscilloscope probe heads and front-end modules where the converter must be physically co-located with the active probe electronics to minimize analog trace length.
推薦
Portable Test and Measurement Instrumentation
For handheld DMMs and portable test instruments, the MAX184BC/D gives designers a 12-bit SAR ADC in a tiny bare-die footprint that fits alongside a microcontroller, display, and battery management circuitry in a hand-held enclosure. The optional -12 V / -15 V negative rail enables true bipolar voltage and current readings while still running from a single +5 V logic rail and a small charge-pump inverter. The external reference input allows use of precision low-power bandgap references that hold accuracy over the instrument's battery-discharge curve. Modern hand-held meters are migrating to newer Maxim/ADI converters, but the MAX184BC/D remains a viable option for legacy or low-cost designs.
推薦
推薦產品摘要
工程參考資料，適用於 MAX184BC/D — 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 | MAX184BCWI | MAX174AEPI | MAX174ACWI | MAX176ACPA | MAX170CCPA |
|---|---|---|---|---|---|---|
| Package | Bare DIE (24 terminals) | SOIC-28 - same | PDIP-28 | SOIC-28 | PDIP-8 | PDIP-8 |
| Brand | Maxim Integrated | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Converter Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Reference Type | External | External | External | External | External | External |
| Nominal Supply | +5 V | +5 V | +5 V | +5 V | +5 V | +5 V |
| Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Form Factor | Bare die (hybrid/MCM) | Packaged SOIC-28 (SMT) | Packaged PDIP-28 (THT) | Packaged SOIC-28 (SMT) | Packaged PDIP-8 (THT) | Packaged PDIP-8 (THT) |
主要差異化特點
- Bare-die form factor for hybrid/MCM modules (對比MAX184BCWI (SOIC-28))
- Optional bipolar input via -12 V or -15 V supply (對比MAX170CCPA / MAX176ACPA (single +5 V supply ADCs))
- External reference input for ratio-metric scaling (對比Internal-reference ADCs)
設計說明
Do not attempt to solder the MAX184BC/D bare die directly onto a PCB - the DIE package code requires die attach and wire bonding in a hybrid/MCM process. Attempting SMT reflow will destroy the silicon. For SMT designs, substitute the MAX184BCWI (SOIC-28) which uses the same die in a packaged format.
Place 0.1 uF ceramic decoupling capacitors within 2 mm of each VDD and VSS pin, and add a 10 uF bulk capacitor at the regulator output. Keep the analog input trace short and guarded by ground; the SAR ADC presents a switched-capacitive load that is sensitive to source-impedance induced gain error. A 10 ohm series resistor at the analog input plus a wide-bandwidth buffer (such as the MAX4475) is recommended for inputs exceeding 5 kohm source impedance.
Use a low-noise linear regulator for the +5 V supply because the SAR ADC rejects ripple only to a few hundred kHz; switching regulators must be followed by LC filtering with at least 40 dB attenuation at the converter's Nyquist frequency. The optional -12 V or -15 V negative rail should likewise come from a low-noise supply - a simple charge-pump from the +5 V rail is acceptable for unipolar-only designs but injects switching noise into bipolar measurements if not properly filtered.
Route the parallel digital output bus away from the analog input trace and the reference pin. The 12-bit data bus transitions in a few tens of nanoseconds and couples capacitively into adjacent traces - keep a ground guard trace between the analog and digital sections on the PCB and use a solid ground plane rather than a grid. For hybrid/MCM layouts, dedicate separate bond-pad regions to analog and digital signals to minimize die-level crosstalk.
合規資訊
Part is supplied as a bare die - finished-article RoHS/REACH compliance must be evaluated by the integrator after assembly. The underlying silicon die is reported to use lead-free metallization per Maxim historical datasheet practices, but no current manufacturer statement is available in verified web data. Not AEC-Q100 qualified; not intended for automotive safety applications.
