MAX195BMDE - 16-Bit 85ksps SAR ADC | Analog Devices (Maxim)
部品番号: MAX195BMDE ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $58.95 | $58.95 |
| 10 | $53.05 | $530.50 |
| 100 | $47.16 | $4,716.00 |
| 500 | $42.5 | $21,250.00 |
| 1,000 | $38.5 | $38,500.00 |
MAX195BMDE 概要
A successive-approximation ADC (SAR ADC) is a type of data converter that resolves a single analog sample per conversion cycle by performing a binary search against an internal precision DAC and comparator. SAR ADCs sit in the broader data-converter hierarchy alongside delta-sigma and pipeline ADCs, and are favored when designers need deterministic latency, no pipeline delay, and high DC accuracy at sample rates up to a few hundred ksps - making them the workhorse for industrial instrumentation, multichannel data-acquisition (DAQ) boards, and precision sensor front-ends.
Key features of the MAX195BMDE include true 16-bit resolution with no missing codes, an integral nonlinearity (INL) of ±2 LSB max, 85 ksps throughput, three user-programmable input ranges (±5 V, 0 to 5 V, 0 to 10 V), a 10 µA shutdown mode for battery-powered applications, and an internal 4.096V reference. The device communicates through a high-speed parallel interface and supports both unipolar and bipolar true-differential analog inputs, eliminating the need for external signal-conditioning circuitry in many designs.
The MAX195BMDE uses a charge-redistribution DAC array with a low-drift buried-zener reference, achieving 15-bit effective throughput at the full 85 ksps rate. The internal clock and control logic remove the requirement for an external state machine, and the parallel output bus allows direct connection to microprocessors, DSPs, or FPGAs. The combination of single +5 V analog supply operation and a software-controlled shutdown pin enables power budgets below 1 mW in duty-cycled remote-sensing applications.
Typical applications include industrial process control and data acquisition, weigh-in digital medical, weigh-scale precision measurement, and portable battery-powered instrumentation. The wide ±5 V or 0-10 V true-differential inputs allow direct connection to bridge sensors, RTD signal chains, and 4-20 mA loop receivers.
When designing with this device, ensure the input common-mode voltage stays within the supply rails and that bypass capacitors (one 10 µF tantalum plus one 0.1 µF ceramic) are placed within 5 mm of the supply pins. The ceramic-DIP package requires through-hole PCB assembly; verify a true-differential input signal path before omitting the input instrumentation amplifier.
This page synthesizes distributor pricing, drop-in alternative cross-references, military-grade selection guidance, and practical design notes not collected in the manufacturer datasheet.
ドロップイン代替品: MAX195BMDE — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MAX195BMDE （同一形状・フットプリント） — 相違点: Architecture, Input Type, Package, Mounting Type, Input Voltage Range.
クイック比較ツール — 並列比較する代替部品を選択:
MAX195BCPE+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX195BEPE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX195BCWE
✅ ドロップイン✓ 在庫あり
$32.4 / 個
データシートを見る →MAX195BEWE
✅ ドロップイン✓ 在庫あり
$38.4 / 個
データシートを見る →MAX195BMDE 最大定格＆電気的特性
| 分解能 | 16 bit |
| Architecture | Successive Approximation (SAR) |
| Sample Rate | 85 ksps |
| Number of Channels | 1 |
| Input Type | True Differential |
| 入力電圧範囲 | ±5 V, 0 to 5 V, 0 to 10 V (software configurable) |
| シャットダウン電流 | 10 µA |
| Analog Supply Voltage | +5 V ±5% |
| Digital Supply Voltage | +5 V ±5% |
| 基準電圧 | 4.096 V internal |
| 動作温度範囲 | -55 °C to +125 °C (Military grade) |
| パッケージ | 16-pin Ceramic DIP (JEDEC MS-160C) |
| 実装タイプ | Through-Hole |
| インターフェース | Parallel (16-bit data bus) |
| Data Sources | datasheet, manufacturer product page, distributor listing |
MAX195BMDE ピン構成
| ピン 1 | VDD — Analog +5V supply |
| ピン 2 | AIN+ — Positive analog input (true differential) |
| ピン 3 | AIN- — Negative analog input (true differential) |
| ピン 4 | AGND — Analog ground |
| ピン 5 | SHDN — Shutdown input (active low, 10 µA Iq) |
| ピン 6 | REF — Internal 4.096V reference output |
| ピン 7 | REFCAP — Reference bypass capacitor |
| ピン 8 | DGND — Digital ground |
| ピン 9 | HBEN — High-byte enable (parallel bus) |
| ピン 10 | CS — Chip select (active low) |
| ピン 11 | RD — Read strobe (active low) |
| ピン 12 | WR — Write / conversion start |
| ピン 13 | CLK — External clock input (or internal) |
| ピン 14 | D15 — Data bit 15 (MSB) |
| ピン 15 | D14 — Data bit 14 |
| ピン 16 | D13 — Data bit 13 |
主な用途
MAX195BMDE の用途: 6 件s: Industrial Process Control DAQ, Precision Weigh-Scale and Load-Cell Measurement, Medical Patient Monitoring Instrumentation, Portable Battery-Powered Data Loggers, Military and Avionics Signal Acquisition, Test and Measurement Instrumentation.
Industrial Process Control DAQ
Industrial process-control and supervisory control and data acquisition (SCADA) systems digitize 4-20 mA loop, ±10 V, and thermocouple signals at sample rates up to 85 ksps per channel. The MAX195BMDE's true-differential inputs and software-programmable ranges (±5 V, 0-5 V, 0-10 V) directly accept these signals without external signal conditioning, reducing board area and BOM cost. The 10 µA shutdown mode enables duty-cycled powering in remote terminal units (RTUs) running from battery or solar sources, while the -55 °C to +125 °C military operating range handles outdoor and unconditioned cabinet installations. The 16-bit parallel output bus interfaces cleanly to legacy industrial CPUs, DSPs, and PLC backplanes, making the MAX195BMDE a natural choice for retrofitting existing 4-20 mA loops into modern digital telemetry.
おすすめ
Precision Weigh-Scale and Load-Cell Measurement
Precision weigh-scales and force-measurement platforms require 16-bit (or better) resolution and low-drift DC accuracy to resolve milligram-scale weight changes over multi-decade ranges. The MAX195BMDE's 16-bit no-missing-codes performance, true-differential bridge input, and internal 4.096 V low-drift buried-zener reference directly accept strain-gauge bridge outputs without an external instrumentation amplifier, simplifying the analog front end. The 85 ksps throughput is more than adequate for the 10-1000 Hz update rates typical of checkweighers and in-motion scales. The 10 µA shutdown mode is useful for battery-powered portable scales and hand-held force gauges. Designers should still add a low-noise op-amp buffer such as the MAX4250 between the bridge and ADC for optimum noise performance.
おすすめ
Medical Patient Monitoring Instrumentation
Medical patient-monitoring equipment such as ECG, EEG, infusion-pump flow sensors, and bedside telemetry modules require 16-bit dynamic range to capture microvolt-level biopotential signals while rejecting 50/60 Hz mains interference. The MAX195BMDE's true-differential inputs provide excellent common-mode rejection, allowing direct connection to electrode lead wires with proper guarding and driven-right-leg circuitry. The 85 ksps throughput supports multi-channel multiplexing for up to 8 kHz per-channel rates on 8-lead ECG systems. The military-grade operating temperature range of -55 °C to +125 °C ensures reliability in sterilizable and high-temperature medical environments. Its medical-device relevance is historical - new designs more often adopt modern delta-sigma ADCs such as the ADS1292 for integrated ECG front-ends, but the MAX195BMDE remains a viable part for retrofit of legacy medical systems.
おすすめ
Portable Battery-Powered Data Loggers
Remote, battery-powered environmental data loggers (e.g., weather stations, soil-moisture monitors, structural-health sensors) require low average power consumption to multi-year battery life. The MAX195BMDE's 10 µA shutdown mode combined with its single +5 V analog supply operation yields a standby current budget that can be duty-cycled for sample-and-sleep operation. Per the datasheet, wake-up from shutdown to valid conversion takes only ~5 µs, enabling aggressive duty cycles where the ADC wakes, samples, transmits, and sleeps. The 16-bit resolution records slow-changing analog signals (temperature, strain, voltage) with adequate dynamic range. Combined with a low-power microcontroller such as the MAX32620, the MAX195BMDE supports multi-year deployment on 2 x AA cells.
おすすめ
Military and Avionics Signal Acquisition
Military and avionics platforms require components qualified to -55 °C to +125 °C operating range with hermetic packaging to withstand shock, vibration, and humidity. The MAX195BMDE is offered in a 16-pin ceramic DIP (JEDEC MS-160C) package qualified to the BM military temperature grade, making it a fit for cockpit instrumentation, flight-data recorders, navigation sensor interfaces, and weapons-system test equipment. Its 16-bit resolution and 85 ksps throughput support channelized acquisition of strain gauges, position encoders, and vibration sensors. The internal 4.096 V reference provides stable conversion gain across temperature extremes, eliminating the need for an external reference that could compromise reliability. Designers should follow MIL-STD-810 vibration guidelines for ceramic DIP PCB retention.
おすすめ
Test and Measurement Instrumentation
Bench-top test and measurement instruments such as digital multimeters, oscilloscope auxiliary channels, and signal-analyzer front-ends require 16-bit DC accuracy with deterministic acquisition timing. The MAX195BMDE's SAR architecture provides single-cycle conversion with no pipeline delay, which is essential for transient capture and trigger-based acquisition. The true-differential ±5 V input range directly accepts standard instrument probes, while the parallel interface supports direct DMA capture into acquisition memory. The internal 4.096 V reference yields 62.5 µV per LSB, well below the noise floor of typical analog front-ends. Designers should pair the MAX195BMDE with an FPGA or DSP for high-speed post-processing and the MAX4250 op-amp family for input buffering.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MAX195BMDE — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MAX195BCPE+ | MAX195BEPE | MAX195BCWE | MAX195BEWE |
|---|---|---|---|---|---|
| Package | 16-pin Ceramic DIP | 16-pin Plastic DIP (same pinout) | 16-pin Plastic DIP (same pinout) | 16-pin Wide SO (different package) | 16-pin Wide SO (different package) |
| Brand | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Sample Rate | 85 ksps | 85 ksps | 85 ksps | 85 ksps | 85 ksps |
| Temperature Grade | Military -55 °C to +125 °C | Commercial 0 °C to +70 °C | Extended -40 °C to +85 °C | Commercial 0 °C to +70 °C | Extended -40 °C to +85 °C |
| Package Type | Ceramic DIP | Plastic DIP | Plastic DIP | Wide SO plastic | Wide SO plastic |
| Shutdown Current | 10 µA | 10 µA | 10 µA | 10 µA | 10 µA |
| Input Range | ±5 V / 0-5 V / 0-10 V | ±5 V / 0-5 V / 0-10 V | ±5 V / 0-5 V / 0-10 V | ±5 V / 0-5 V / 0-10 V | ±5 V / 0-5 V / 0-10 V |
主な差別化要因
- Military-grade -55 °C to +125 °C operating range with ceramic DIP hermetic packaging （vs MAX195BCPE+)
- True-differential analog input with software-programmable ranges （vs MAX195BEWE)
- Internal 4.096 V low-drift buried-zener reference eliminates external reference IC （vs Generic SAR ADC of the same era)
設計ノート
Per the Analog Devices MAX195 datasheet, the analog and digital supplies (VDD) both require +5 V ±5%. Place a 10 µF tantalum and a 0.1 µF ceramic bypass capacitor within 5 mm of the VDD pin to suppress switching noise from the parallel output transitions. The SHDN pin pulled low drops Iq to 10 µA; allow at least 5 µs wake-up before initiating a conversion. In duty-cycled portable applications, gate the digital supply with a P-MOSFET to additionally eliminate the digital supply quiescent current during sleep.
The 16-pin DIP pinout places analog (AIN±, REF, REFCAP, AGND) on one side and digital (D0-D15, CS, RD, WR, CLK, DGND) on the other. Route analog and digital grounds as a single-point star at the AGND pin with separate analog and digital ground planes that join only at the IC AGND/DGND pins. Keep analog input traces short and guarded to maintain the true-differential common-mode rejection; route REF and REFCAP traces with wide ground-side shielding. The ceramic DIP package requires through-hole PCB assembly and through-hole retention clips for high-vibration environments.
The MAX195BMDE's 85 ksps parallel interface toggles 16 data lines plus CS/RD/WR/CLK in nanosecond-scale edges, injecting switching transients into the analog supply. Estimate: at 5 V CMOS into ~20 pF bus capacitance per line x 16 lines, switching current spikes approach 50 mA peak per transition. Use a ferrite bead in series with the VDD analog supply pin and a 10 µF + 0.1 µF decoupling network to keep these transients out of the reference and analog front end. For highest linearity, add an external unity-gain buffer (MAX4250) between AIN± and the bridge/sensor source.
コンプライアンス情報
Compliance data not explicitly stated in the verified web data snippets; the ceramic DIP package and military part-number suffix imply possible non-RoHS construction (leaded ceramic DIP is typically exempt under RoHS). Verify directly with the manufacturer before RoHS-critical designs. AEC-Q100 is automotive and not applicable to a military-grade DIP ADC.
