MAX1070CTC+ - 1.5Msps 10-Bit Differential ADC | Analog Devices
部品番号: MAX1070CTC+ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.55 | $75.50 |
| 100 | $6.71 | $671.00 |
| 500 | $5.92 | $2,960.00 |
| 1,000 | $5.18 | $5,180.00 |
MAX1070CTC+ 概要
A Successive Approximation Register (SAR) ADC is a converter architecture that resolves each digital code one bit at a time using an internal precision DAC and a comparator, trading raw speed for very low power dissipation and inherent latency determinism. Within the broader product hierarchy, SAR ADCs sit under the ADC IC family, which itself is a sub-category of data converters and ultimately of mixed-signal / power-management semiconductor ICs. The MAX1070's 1.5Msps throughput, true-differential analog inputs and SPI/QSPI/MICROWIRE-compatible serial interface place it firmly in the mid-speed, low-power tier of this hierarchy, between precision 16-/18-bit converters and kilosample-per-second delta-sigma converters.
Key features include true-differential analog inputs for better common-mode noise rejection, a high-impedance analog input stage with ±VREF input range, internal +2.5V reference, an external reference option, and a power-down mode that drops supply current to a few microamps between conversions. The serial interface eliminates parallel digital bus noise on the PCB and allows the device to be used with virtually any microcontroller or FPGA. Built-in track-and-hold and a wide ±0.5 LBN INL/DNL specification deliver predictable linearity for closed-loop control loops.
Typical applications include motor-control current/voltage sensing, industrial process-control analog front ends, portable instrumentation with battery-saving power-down sequencing, and optical/sensor signal conditioning. The MAX1070's low quiescent current and small TQFN footprint suit it particularly to space-constrained or thermally sensitive embedded designs. Designers should observe the analog and digital ground separation recommended in the manufacturer datasheet and place the decoupling capacitor as close as possible to the supply pins.
ドロップイン代替品: MAX1070CTC+ — 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: MAX1070CTC+ （同一形状・フットプリント） — 相違点: Package, Number of Channels, Internal Reference, Input Type, Data Interface.
クイック比較ツール — 並列比較する代替部品を選択:
MAX1070CTC+T
✅ ドロップイン✓ 在庫あり
$4.78 / 個
データシートを見る →MAX1070ETC+
✅ ドロップイン✓ 在庫あり
$0.85 / 個
データシートを見る →MAX1071ETC+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1070CTC+ 最大定格＆電気的特性
| 分解能 | 10 bit |
| サンプリングレート | 1.5 Msps |
| Architecture | SAR (Successive Approximation) |
| Input Type | True Differential |
| Analog Supply Voltage | +5 V |
| Digital Supply Voltage | +2.7 V to +5.25 V |
| 入力電圧範囲 | ±VREF |
| Internal Reference | +2.5 V |
| External Reference Support | Yes |
| Number of Channels | 1 |
| Data Interface | Serial (SPI/QSPI/MICROWIRE-compatible) |
| 動作温度範囲 | 0C to +70C (commercial) |
| パッケージ | 12-pin TQFN (4x4 mm) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
MAX1070CTC+ ピン構成
| ピン 1 | VDD — +5V analog supply |
| ピン 2 | AIN+ — Positive analog input |
| ピン 3 | AIN- — Negative analog input |
| ピン 4 | REF — Reference input/output (internal +2.5V or external reference) |
| ピン 5 | GND — Analog ground |
| ピン 6 | SHDN — Hardware shutdown (active low) |
| ピン 7 | DOUT — Serial data output |
| ピン 8 | SSTRB — Serial-strobe output |
| ピン 9 | CS — Chip select (active low) |
| ピン 10 | SCLK — Serial clock input |
| ピン 11 | DVDD — +2.7V to +5.25V digital supply |
| ピン 12 | DGND — Digital ground |
主な用途
MAX1070CTC+ の用途: 6 件s: Motor Control Current Sensing, Industrial Process Control Front End, Portable Battery-Powered Instrumentation, Optical / Sensor Signal Conditioning, Data Acquisition Systems (DAQ), Medical Patient Monitoring.
Motor Control Current Sensing
The MAX1070CTC+ fits BLDC and PMSM motor-control current sensing because its 1.5 Msps throughput exceeds the bandwidth needed for field-oriented control (FOC) loops, and its true-differential analog inputs reject common-mode switching noise from the inverter stage. The internal +2.5V reference and external reference option support both 3.3V logic-level microcontroller sense networks and higher-voltage industrial drives. Placed adjacent to the shunt resistor with short, low-noise traces and a 100 nF+10uF decoupling network on each supply, the converter delivers reliable current-loop feedback without injecting switching noise into the analog domain.
おすすめ
Industrial Process Control Front End
Process-control analog front ends benefit from the MAX1070CTC+'s true-differential ±VREF input range, which directly accepts 4-20 mA loop-derived shunt voltages without an instrumentation amplifier. The 1.5 Msps sample rate oversamples slowly-varying process signals to improve effective resolution through averaging, while the SPI-compatible serial output interfaces directly to industrial PLCs and embedded controllers. Designers leverage the hardware SHDN pin for duty-cycled sampling in loop-powered field instruments, reducing average supply current to under 1 mA during idle periods.
おすすめ
Portable Battery-Powered Instrumentation
The MAX1070CTC+ is well-suited to portable instrumentation thanks to its low quiescent current in normal operation and the few-microamp power-down mode between bursts of conversion, both of which extend battery life. The 12-pin TQFN (4x4 mm) footprint fits handheld enclosures, and the separate analog +5V and digital +2.7V-to-+5.25V supplies allow the device to interface directly with low-power microcontrollers running from a single Li-ion cell. Burst-sampling 1.5 Msps waveforms and entering shutdown during idle periods is the typical energy-optimization pattern for this part in field instruments.
おすすめ
Optical / Sensor Signal Conditioning
Photodiode, thermopile, and other high-impedance sensor front ends pair naturally with the MAX1070CTC+ because its high-impedance analog input stage accepts low-level sensor signals without loading the source. The internal +2.5V reference can be overridden by an external low-noise reference for ratiometric measurements against an LED drive current. Operating at 1.5 Msps allows oversampling of slowly-varying optical signals to extract 2-3 extra effective bits below the 10-bit native resolution, which is useful for absorbance and turbidity measurements.
おすすめ
Data Acquisition Systems (DAQ)
Multi-channel DAQ cards use the MAX1070CTC+ in conjunction with external multiplexers to digitize many analog channels sequentially at 1.5 Msps aggregate throughput. The serial output avoids wide parallel bus routing that would otherwise couple digital switching noise into adjacent analog traces. The internal +2.5V reference and differential inputs reduce BOM cost versus discrete ADC + external reference + instrumentation amplifier solutions, which is critical for cost-sensitive PCI- and USB-based DAQ modules where board space is at a premium.
おすすめ
Medical Patient Monitoring
Patient-monitoring equipment such as bedside monitors and ambulatory telemetry units use the MAX1070CTC+ for ECG, SpO2 plethysmography, and respiration channels because its true-differential input rejects 50/60 Hz common-mode mains noise coupled through the patient cable. The 1.5 Msps sample rate captures ECG bandwidth with margin for digital filtering, while the SPI interface keeps the analog front-end board small. The hardware SHDN pin allows duty-cycling to extend battery life in wearable telemetry patches.
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: MAX1070CTC+ — 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 | MAX1070CTC+T | MAX1070ETC+ | MAX1071ETC+ |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 12-pin TQFN (4x4 mm) | 12-pin TQFN - same | 12-pin TQFN - same | 12-pin TQFN - same |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Sampling Rate | 1.5 Msps | 1.5 Msps | 1.5 Msps | 1.5 Msps |
| Architecture | SAR | SAR | SAR | SAR |
| Analog Supply | +5 V | +5 V | +5 V | Different rail partitioning (see datasheet) |
| Digital Supply | +2.7 V to +5.25 V | +2.7 V to +5.25 V | +2.7 V to +5.25 V | Different rail partitioning (see datasheet) |
| Internal Reference | +2.5 V | +2.5 V | +2.5 V | +2.5 V |
| Input Channels | 1 differential | 1 differential | 1 differential | 1 differential |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | Extended temperature grade | Extended temperature grade |
主な差別化要因
- True-differential input with internal +2.5V reference （vs MAX1071ETC+)
- Factory-reel packaging variant available for high-volume production （vs MAX1070CTC+T)
- Commercial vs extended temperature grade options （vs MAX1070ETC+)
設計ノート
Decouple VDD (+5V analog) and DVDD (+2.7V to +5.25V digital) with separate 100 nF X7R ceramic capacitors placed as close as possible to the package pins, with a 10 uF bulk tantalum or ceramic capacitor on each rail. Splitting analog and digital grounds and joining them at a single point (star ground) under the converter is essential to avoid digital switching noise coupling into the analog domain and degrading SINAD.
Route the analog input traces (AIN+, AIN-) as a true differential pair with matched length and width, kept short and away from the SCLK, DOUT, SSTRB, and CS digital traces. Place the converter adjacent to the sensor or shunt resistor to minimize trace-induced EMI. Use a continuous analog ground plane under the input pair and stitch the digital ground plane back to the analog ground at the single star-ground point near the converter.
When using an external reference, drive the REF pin from a low-noise, low-impedance source (e.g., a precision reference with a 10 ohm series resistor and 100 nF + 10 uF decoupling network). The SCLK line should be clean; avoid routing SCLK near the analog inputs or reference. Place a 33 ohm series resistor near the SCLK source if reflections appear on a long trace to the controller.
Do not exceed VDD = +5V absolute maximum on the analog supply, or DVDD = +5.25V absolute maximum on the digital supply. The SHDN pin is active-low - leaving it floating will keep the part enabled. The CS pin must be driven low for serial output; a floating CS can cause spurious data on DOUT. Confirm that the controller's SPI mode (CPOL/CPHA) matches the MAX1070's clock-polarity setting before commissioning the interface.
コンプライアンス情報
RoHS compliance stated on distributor listings and manufacturer product page. AEC-Q100 qualification not applicable - choose MAX1070ETC+ or automotive-grade equivalent for vehicular applications.
