MAX1179BCUI+ - 16-Bit 135ksps Bipolar ADC | Maxim Integrated
部品番号: MAX1179BCUI+ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $40.67 | $40.67 |
| 10 | $38.55 | $385.50 |
| 100 | $32.18 | $3,218.00 |
| 500 | $26.95 | $13,475.00 |
| 1,000 | $23.4 | $23,400.00 |
MAX1179BCUI+ 概要
An SAR ADC is a type of analog-to-digital converter that uses a successive-approximation register to perform binary search on the input voltage. SAR converters occupy the niche between slow, high-resolution sigma-delta ADCs (used for precision DC measurements) and fast, lower-resolution flash ADCs (used in oscilloscopes). Within the broader signal-chain hierarchy they sit alongside sample-and-hold amplifiers, input multiplexers, and voltage references; the part family here belongs to Maxim's data-conversion portfolio (ADC -> data converter -> mixed-signal IC -> semiconductor).
Key features include a true bipolar ±12V (or 0 to +12V, user-selectable) input range without external signal conditioning, integrated track-and-hold, factory-trimmed internal clock, and a 16-bit parallel interface. The bipolar capability eliminates the front-end op-amp/inverter chain typically required to digitize signals centered around ground, simplifying industrial process-control and instrumentation designs.
Internally, the device combines a capacitive-charge-distribution DAC with auto-calibration logic. Factory trimming removes offset and gain error at production, achieving ±1.5 LSB INL and ±1 LSB DNL typical, plus 86dB SINAD at 100kHz. The architecture supports single-shot conversions via the CONVST pin and offers throughput scalable down to 1ksps with proportional power savings (90 microamps at 1ksps).
Typical applications include industrial process control (4-20mA loop digitization through a sense resistor), data-acquisition boards, pen plotters, and portable instrumentation. The bipolar input makes the MAX1179BCUI+ especially attractive in PLCs and motor-control feedback paths where signals swing around 0V.
Design consideration: drive AIN through a low-impedance source (op-amp buffer or instrumentation amp) because the ADC's input draws 1 microamp of leakage and the input capacitance settles in microseconds; a 10kohm source impedance limits 16-bit settling. Provide a clean AGND and DGND split, joined only at one point near the ADC.
This page synthesizes distributor pricing, parametric comparison against same-family Maxim variants, drop-in alternative guidance, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: MAX1179BCUI+ — 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: MAX1179BCUI+ （同一形状・フットプリント） — 相違点: Package, Operating Temperature, Resolution, Input Type, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
MAX1179AEUI+
✅ ドロップイン✓ 在庫あり
$8.29 / 個
データシートを見る →MAX1187BCUI+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1189BCUI+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1156AEUP+T
✅ ドロップイン✓ 在庫あり
$7.8 / 個
データシートを見る →MAX1165BEUI+T
✅ ドロップイン✓ 在庫あり
$9.3 / 個
データシートを見る →MAX1165ACUI+
✅ ドロップイン✓ 在庫あり
$6.1 / 個
データシートを見る →MAX1147BEUP+T
✅ ドロップイン✓ 在庫あり
$8.7 / 個
データシートを見る →MAX1179BCUI+ 最大定格＆電気的特性
| 分解能 | 16 bit |
| Sample Rate | 135 ksps |
| Architecture | SAR (Successive Approximation) |
| Number of Inputs | 1 |
| Input Type | Single-Ended, Bipolar (software-selectable ±12V or 0 to +12V) |
| Analog Supply Voltage | 4.75 V to 5.25 V (typ +5 V) |
| Digital Supply Voltage | 4.75 V to 5.25 V (typ +5 V) |
| Analog Supply Current (Normal) | 2.5 mA typ |
| Differential Nonlinearity (DNL) | ±1 LSB typ |
| SINAD | 86 dB typ at 100 kHz input |
| Data Interface | Parallel (16-bit) |
| 動作温度 | 0 °C to +70 °C (commercial, BC suffix) |
| パッケージ | 28-TSSOP (4.40 mm) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
MAX1179BCUI+ ピン構成
| ピン 1 | AIN — Analog input |
| ピン 2 | AGND — Analog ground |
| ピン 3 | REF — Reference bypass/decoupling |
| ピン 4 | AVDD — +5V analog supply |
| ピン 5 | BIP/UNI — Bipolar/unipolar input range select |
| ピン 6 | CONVST — Conversion start (active low) |
| ピン 7 | CS — Chip select (active low) |
| ピン 8 | RD — Read (active low) |
| ピン 9 | WR — Write (active low) |
| ピン 10 | DGND — Digital ground |
| ピン 11 | DVDD — +5V digital supply |
| ピン 12 | D15 — Data bit 15 (MSB) |
| ピン 13 | D14 — Data bit 14 |
| ピン 14 | D13 — Data bit 13 |
| ピン 15 | D12 — Data bit 12 |
| ピン 16 | D11 — Data bit 11 |
| ピン 17 | D10 — Data bit 10 |
| ピン 18 | D9 — Data bit 9 |
| ピン 19 | D8 — Data bit 8 |
| ピン 20 | D7 — Data bit 7 |
| ピン 21 | D6 — Data bit 6 |
| ピン 22 | D5 — Data bit 5 |
| ピン 23 | D4 — Data bit 4 |
| ピン 24 | D3 — Data bit 3 |
| ピン 25 | D2 — Data bit 2 |
| ピン 26 | D1 — Data bit 1 |
| ピン 27 | D0 — Data bit 0 (LSB) |
| ピン 28 | INT/EXT CLK — Clock select or external clock input |
主な用途
MAX1179BCUI+ の用途: 6 件s: Industrial Process Control (PLC Analog Inputs), Data Acquisition Systems (DAQ Boards), Portable / Battery-Powered Instrumentation, Pen Plotters and Chart Recorders, Motor Control Feedback Paths, Test & Measurement Instrumentation.
Industrial Process Control (PLC Analog Inputs)
The MAX1179BCUI+ is well suited for industrial PLC analog input modules because its true bipolar ±12 V input range digitizes 4-20 mA loop signals (via a 250 ohm sense resistor producing 1-5 V) and ±10 V instrumentation signals without external inversion or level shifting. With 16-bit resolution and 135 ksps throughput, it captures fast process variables while the integrated track-and-hold and auto-calibrated INL (±1.5 LSB) preserve measurement linearity. The single +5 V analog supply simplifies isolated PLC backplane power design. Unlike a sigma-delta ADC, the SAR architecture settles in one conversion with no pipeline delay, simplifying deterministic loop control.
おすすめ
Data Acquisition Systems (DAQ Boards)
The MAX1179BCUI+ serves as the per-channel ADC core in multi-channel data-acquisition boards where each input requires true bipolar swing and 16-bit precision. Its 135 ksps rate allows per-channel throughput of 100 ksps+ after overhead, supporting vibration analysis, acoustic measurement, and transducer signal capture. The 16-bit parallel interface simplifies FPGA or DSP bus attachment, and the integrated track-and-hold eliminates external sample-and-hold circuits. Compared with a sigma-delta ADC of similar bandwidth, the SAR settling is single-cycle with no group-delay, preserving phase relationships in multi-channel synchronous sampling.
おすすめ
Portable / Battery-Powered Instrumentation
The MAX1179BCUI+ suits portable and battery-powered instrumentation because its automatic power-down between conversions drops supply current to roughly 90 microamps at 1 ksps, an order of magnitude below its 2.5 mA continuous-current figure. The +5 V single-supply operation aligns with 4-cell NiMH or 1-cell Li-ion + boost topologies common in field instruments. Its 16-bit resolution and bipolar ±12 V input accommodate a wide range of transducer outputs (load cells, strain gauges, pressure sensors) without input-conditioning overhead, extending battery life in field-deployed data loggers and handheld multimeters.
おすすめ
Pen Plotters and Chart Recorders
The MAX1179BCUI+ is well matched to pen plotter and chart recorder signal acquisition, where analog inputs (position feedback, stylus drive, sensor signals) often swing around ground and require 16-bit precision for trace accuracy. Its integrated bipolar input eliminates the input-conditioning chain that unipolar ADCs need to handle negative-going waveforms from AC-coupled sensors. The 135 ksps sample rate oversamples the mechanical bandwidth of plotter pen drives by a wide margin, while parallel data output simplifies hand-off to the plotter's motion controller. Power-down between conversions reduces thermal dissipation in the enclosed plotter chassis.
おすすめ
Motor Control Feedback Paths
The MAX1179BCUI+ works in motor control feedback loops where current-sense and back-EMF waveforms swing around 0 V and require 16-bit resolution for torque-ripple and speed-control accuracy. Its 135 ksps throughput captures PWM-cycle current at typical 20 kHz switching rates with 6x oversampling margin. The SAR architecture's single-conversion settling (no pipeline delay) preserves phase relationships critical to field-oriented control (FOC) algorithms. The bipolar ±12 V input handles 10 V sense-resistor signals with margin, eliminating external scaling amplifiers and reducing PCB area.
おすすめ
Test & Measurement Instrumentation
The MAX1179BCUI+ suits bench-top and rack-mount test instrumentation including oscilloscope front-end digitizers (for slow auxiliary channels), spectrum analyzer IF digitizers, and arbitrary waveform generator output-monitor ADCs. Its 16-bit resolution and 86 dB SINAD at 100 kHz input provide ample dynamic range for audio-bandwidth and low-IF measurement. The 135 ksps rate is sufficient for many audio and vibration applications. The parallel 16-bit interface mates directly with FPGA capture buffers, while the single +5 V rail simplifies mixed-signal PCB layout in dense instrument designs.
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: MAX1179BCUI+ — 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 | MAX1179AEUI+ | MAX1187BCUI+ | MAX1189BCUI+ | MAX1156AEUP+T | MAX1165BEUI+T |
|---|---|---|---|---|---|---|
| Package | 28-TSSOP | 28-TSSOP - same | 28-TSSOP - same | 28-TSSOP - same | 28-TSSOP - same | 28-TSSOP - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit | 16 bit |
| Sample Rate | 135 ksps | 135 ksps | 135 ksps | 135 ksps | 200 ksps | 250 ksps |
| Input Range | Bipolar ±12V / 0 to +12V | Bipolar ±12V / 0 to +12V | Unipolar 0 to +5V | Unipolar 0 to +10V | Bipolar ±10V | Unipolar 0 to +5V |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Interface | Parallel 16-bit | Parallel 16-bit | Parallel 16-bit | Parallel 16-bit | Parallel 12-bit | Parallel 16-bit |
| Operating Temperature | 0°C to +70°C | -40°C to +85°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C | 0°C to +70°C |
主な差別化要因
- True bipolar ±12V input without external signal conditioning （vs MAX1187BCUI+)
- Industrial temperature grade option in same footprint （vs MAX1179BCUI+ vs MAX1179AEUI+)
- Lower cost vs 250 ksps unipolar alternative when speed not needed （vs MAX1165BEUI+T)
設計ノート
Use a single-point AGND/DGND connection (star ground) near the MAX1179BCUI+ to prevent digital return currents from contaminating the analog input. Place a 10uF tantalum plus 0.1uF ceramic decoupling pair directly on AVDD and DVDD pins; bypass REF with 0.1uF to AGND. Keep digital data bus traces (D0-D15) short and routed away from the AIN trace to minimize digital-noise coupling into the analog input.
Drive the MAX1179BCUI+ analog input AIN through a low-impedance buffer (op-amp or instrumentation amp) capable of settling to 16-bit accuracy within the ADC's acquisition time. The ADC input draws approximately 1uA leakage and presents a few-pF input capacitance; a 10kohm source impedance combined with this capacitance will not settle to 16-bit precision at the full 135 ksps rate. Use an op-amp with at least 1 MHz bandwidth and sub-mV offset for best DC accuracy.
Do not exceed AVDD or DVDD of 5.25V (abs max 6V). Drive CONVST, CS, RD, WR with logic levels referenced to DGND - do not let logic signals exceed DVDD by more than 0.3V or undershoot below DGND. The BIP/UNI pin must be tied statically to AVDD or DGND (or driven by a clean logic signal) - floating this pin selects undefined input range. At low sample rates below 1 ksps, expect INL to drift slightly versus the datasheet specification due to reduced self-heating of internal references.
コンプライアンス情報
RoHS-compliant per Maxim product marking; REACH, halogen-free, and conflict-minerals status not published in the verified data - contact Maxim/ADI for documentation.
