MAX1395MTB+T - 10-Bit 357ksps SAR ADC, 2-Ch | Maxim Integrated
部品番号: MAX1395MTB+T ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.48 | $64.80 |
| 100 | $5.62 | $562.00 |
| 500 | $4.93 | $2,465.00 |
| 1,000 | $4.31 | $4,310.00 |
| 2,500 | $3.84 | $9,600.00 |
MAX1395MTB+T 概要
A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a comparator, a DAC, and a successive-approximation register to convert an analog input to a digital code one bit at a time, typically within N clock cycles for N-bit resolution. SAR ADCs sit within the broader data-converter family alongside flash, pipeline, sigma-delta, and dual-slope architectures, and are favored for low-latency, low-power, and easy-to-drive applications such as instrumentation, sensor read-out, and precision control loops. The MAX1395 belongs to the Maxim low-power SAR family targeted at battery-powered and portable systems.
Key features include 357 ksps throughput, 1.5 V to 3.6 V single-supply operation, 2 µA automatic shutdown mode, an external REF input for ratiometric measurements, a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface, and a true-differential input stage that delivers excellent common-mode noise rejection. The 10-pin TDFN-EP package provides a low thermal resistance path and a compact footprint suitable for space-constrained designs.
Internally, the MAX1395 integrates a track-and-hold, comparator, charge-redistribution DAC, and SAR logic, delivering ±1 LSB INL and ±1 LSB DNL with no missing codes. The wide analog input range (0 to VREF for single-ended, ±VREF/2 for true-differential) supports bridge sensors, thermocouples, and other low-level signals without external signal conditioning.
Typical applications include portable instrumentation, battery-monitoring front-ends, sensor conditioning for strain gauges and thermistors, patient-monitoring devices, and industrial process-control loops. The differential input stage makes it especially well suited for noisy industrial environments.
When designing with this part, place the reference bypass capacitor (typically 0.1 µF) close to pin 7 to minimize reference noise and ensure clean conversions. The SHDN pin allows the host MCU to gate conversions for ultra-low average power in duty-cycled battery applications.
This page synthesizes distributor pricing, drop-in alternatives from the same MAX139x family, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: MAX1395MTB+T — 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: MAX1395MTB+T （同一形状・フットプリント） — 相違点: Number of Channels, Package, Resolution, Architecture, Interface.
クイック比較ツール — 並列比較する代替部品を選択:
MAX1395ETB+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1392MTB+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1396ETB+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1395MTB-T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1395MTB+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1395MTB+T 最大定格＆電気的特性
| 分解能 | 10 bit |
| Sample Rate | 357 ksps |
| Number of Channels | 2 (1 differential / 2 single-ended) |
| 電源電圧 | 1.5 V to 3.6 V (single) |
| 電源電流 | 2.7 mW (typical at 3 V, 357 ksps) |
| シャットダウン電流 | 1 µA (automatic shutdown) |
| Input Type | True-differential or single-ended |
| Architecture | SAR (Successive Approximation) |
| Reference | External REF |
| インターフェース | 3-wire SPI/QSPI/MICROWIRE-compatible serial |
| INL | ±1 LSB (max) |
| DNL | ±1 LSB (max, no missing codes) |
| 動作温度 | -40C to +85C |
| パッケージ | 10-TDFN (3x3 mm) |
| 実装タイプ | Surface Mount |
| MSLレベル | 1 |
| RoHS ステータス | Compliant |
MAX1395MTB+T ピン構成
| ピン 1 | REF — External reference voltage input |
| ピン 2 | AIN2 — Analog input 2 (single-ended ch2 / differential in-) |
| ピン 3 | AIN1 — Analog input 1 (single-ended ch1 / differential in+) |
| ピン 4 | GND — Ground |
| ピン 5 | CS — Active-low chip select (serial interface) |
| ピン 6 | SCLK — Serial clock input |
| ピン 7 | DOUT — Serial data output |
| ピン 8 | SHDN — Active-high shutdown input |
| ピン 9 | VDD — Positive supply voltage (1.5 V to 3.6 V) |
| ピン 10 | NC — Not connected (per datasheet) |
主な用途
MAX1395MTB+T の用途: 6 件s: Portable Battery Monitoring, Industrial Sensor Signal Conditioning, Patient Monitoring Devices, Strain-Gauge Weighing Scale Front-End, Thermistor and Thermocouple Read-Out, Joystick and Game-Controller Position Sensing.
Portable Battery Monitoring
The MAX1395MTB+T suits single-cell Li-ion and multi-cell alkaline battery monitoring because it operates from a single 1.5 V to 3.6 V supply directly from the battery stack, eliminating the need for an auxiliary regulator. Its 2.7 mW typical power consumption at 357 ksps, combined with 1 µA automatic shutdown between conversions, makes it ideal for handheld meters where standby battery life dominates. Place the ADC directly across the sense resistor on the high-side shunt with the differential input rejecting common-mode ground bounce from switching regulators. Compared to 12-bit alternatives, the 10-bit resolution is sufficient for state-of-charge calculations that already rely on coulomb-counting rather than voltage-curve inflection points.
おすすめ
Industrial Sensor Signal Conditioning
The MAX1395MTB+T integrates cleanly into 4 mA to 20 mA loop-powered sensor transmitters and bridge-sensor read-out boards thanks to its true-differential input stage that rejects common-mode noise from motors, relays, and switching power stages. With ±1 LSB INL and no missing codes, it delivers the linearity required for strain-gauge weighing scales and pressure transducers. The wide analog input range up to VREF gives designers flexibility to set reference voltage via a precision external REF such as a 2.5 V shunt for direct ratiometric measurement of bridge outputs. The 10-pin TDFN package with thermal pad provides a low-impedance ground path to minimize ground-loop offsets in noisy industrial cabinets.
おすすめ
Patient Monitoring Devices
The MAX1395MTB+T is well matched to portable patient-monitoring devices such as pulse oximeters, ECG patches, and continuous-glucose monitors because its low supply current of 2.7 mW at full speed preserves battery life in wearable form factors. The differential input channel directly digitizes the output of low-level bioelectric amplifiers without requiring additional instrumentation stages. Combined with its small 10-TDFN (3x3 mm) footprint and 1 µA shutdown current between conversions, it enables always-on vitals monitoring with minimal average power drain. The 10-bit resolution is sufficient for heart-rate trending and oxygen-saturation calculations where detection thresholds operate in single-digit-percentage resolution bands.
おすすめ
Strain-Gauge Weighing Scale Front-End
The MAX1395MTB+T serves as a low-noise front-end for kitchen and bathroom scales, postal scales, and load-cell instrumentation where 10-bit resolution provides the typical 1 percent weighing accuracy required for consumer products. The differential input pairs directly with a 350 ohm or 1 kohm load cell bridge, while the external REF input supports ratiometric measurement to eliminate ratiometric drift in the excitation supply. The shutdown feature between conversions reduces average current to 1 µA, making battery-powered scales practical over multi-year shelf life. For commercial-grade 0.1 percent scales, upgrade to the pin-compatible MAX1396ETB+T 12-bit version.
おすすめ
Thermistor and Thermocouple Read-Out
The MAX1395MTB+T digitizes NTC thermistor divider outputs and K-type thermocouple millivolt signals with its true-differential inputs, providing the common-mode rejection needed to reject 50 Hz and 60 Hz line noise injected by nearby AC wiring. With 357 ksps throughput, the ADC supports oversampling-and-averaging firmware routines that further improve effective resolution for slow-moving temperature signals. The shutdown feature allows duty-cycling to a few samples per second for battery-powered thermostats and HVAC sensors. The 10-bit resolution provides 0.5 C typical accuracy when paired with NTC thermistors in the 0 to 70 C range.
おすすめ
Joystick and Game-Controller Position Sensing
The MAX1395MTB+T handles dual-axis potentiometer joystick readouts using both single-ended input channels, with the 3-wire SPI interface allowing direct connection to microcontroller GPIO without external glue logic. The 357 ksps sample rate easily handles the 1 kHz to 10 kHz update rates of human-interface devices while remaining battery-friendly at 2.7 mW. The shutdown mode between active sampling saves energy in wireless game controllers where the host MCU duty-cycles inputs to preserve battery life during idle. 10-bit resolution provides the 1024-step granularity required for smooth analog joystick control in gaming and industrial pendant applications.
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: MAX1395MTB+T — 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 | MAX1395ETB+T | MAX1392MTB+T | MAX1396ETB+T | MAX1395MTB-T | MAX1395MTB+ |
|---|---|---|---|---|---|---|
| Package | 10-TDFN (3x3) | 10-TDFN (3x3) - same | 10-TDFN (3x3) - same | 10-TDFN (3x3) - same | 10-TDFN (3x3) - same | 10-TDFN (3x3) - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 10 bit | 10 bit | 12 bit | 12 bit | 10 bit | 10 bit |
| Sample Rate | 357 ksps | 357 ksps | 225 ksps | 225 ksps | 357 ksps | 357 ksps |
| Supply Voltage | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 1.5 V to 3.6 V |
| Input Channels | 2 (1 diff / 2 SE) | 2 (1 diff / 2 SE) | 2 (1 diff / 2 SE) | 2 (1 diff / 2 SE) | 2 (1 diff / 2 SE) | 2 (1 diff / 2 SE) |
| Temperature Range | -55C to +125C (M grade) | -40C to +85C (E grade) | -55C to +125C (M grade) | -40C to +85C (E grade) | -55C to +125C (M grade) | -55C to +125C (M grade) |
| Interface | 3-wire SPI/QSPI/MICROWIRE | 3-wire SPI/QSPI/MICROWIRE | 3-wire SPI/QSPI/MICROWIRE | 3-wire SPI/QSPI/MICROWIRE | 3-wire SPI/QSPI/MICROWIRE | 3-wire SPI/QSPI/MICROWIRE |
主な差別化要因
- Higher sample rate than 12-bit sibling in same package （vs MAX1392MTB+T)
- Military temperature grade (-55C to +125C) for harsh environments （vs MAX1395ETB+T)
- Lower cost than 12-bit alternatives for non-precision uses （vs MAX1396ETB+T)
設計ノート
Decouple VDD (pin 9) with a 10 µF tantalum in parallel with a 0.1 µF ceramic capacitor placed within 5 mm of the IC pin. Per the MAX1392/MAX1395 datasheet, the ADC's internal charge-pump generates brief current spikes during conversion that can corrupt measurements if not properly bypassed. For low-noise reference applications, also place a 0.1 µF ceramic directly on the REF pin (pin 1) to filter reference voltage noise.
Solder the exposed thermal pad on the underside of the 10-TDFN package to a continuous ground plane to minimize thermal resistance and provide a low-impedance return path for digital switching currents. Per Maxim's recommended PCB layout, route the analog input traces (AIN1, AIN2) as a guarded differential pair away from digital lines (CS, SCLK, DOUT) to prevent digital-to-analog crosstalk during conversion. Use a ground cutout between the analog input section and the digital interface section of the PCB.
For true-differential input mode, drive the AIN+ and AIN- inputs symmetrically with matched source impedances to preserve common-mode rejection. Per the datasheet, the common-mode rejection is typically 75 dB at 60 Hz with matched 1 kohm source impedances; mismatched impedances degrade CMRR. Add a 100 pF capacitor between AIN1 and AIN2 if the source impedance exceeds 1 kohm to roll off common-mode RF pickup above the ADC's input bandwidth.
Do not operate the ADC with a reference voltage higher than VDD - per the MAX1392/MAX1395 datasheet, the REF input must be between 1 V and VDD. Driving REF above VDD causes latch-up and permanent damage. Also note that the SHDN pin is active-high (logic-high = shutdown), which is opposite of many Maxim ADCs - confirm shutdown logic in firmware to avoid leaving the ADC in shutdown unintentionally.
コンプライアンス情報
RoHS and REACH compliant per Maxim Integrated product page. Not AEC-Q100 qualified; for automotive applications review the MAX139x automotive part numbers if available. Tape and reel packaging is lead-free matte tin over copper.
