MAX1179CCUI+T - 16-Bit 135ksps Bipolar SAR ADC | Maxim Integrated
料号： MAX1179CCUI+T ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.78 | $167.80 |
| 100 | $14.95 | $1,495.00 |
| 500 | $13.4 | $6,700.00 |
| 1,000 | $11.92 | $11,920.00 |
MAX1179CCUI+T 概述
An SAR ADC is a type of data converter that performs a binary-search analog-to-digital conversion using a capacitive charge-redistribution DAC and a single comparator, achieving deterministic latency and excellent DC accuracy without the pipeline delay or switching-ripple artifacts common to delta-sigma and pipeline ADCs. SAR ADCs sit within the broader analog-to-digital converter hierarchy (SAR -> ADC -> data converter -> mixed-signal IC -> semiconductor) and are favored for multiplexed acquisition, industrial control loops, and portable instrumentation because each conversion completes in one acquisition cycle.
Key features include ±5V bipolar input range on a single supply, throughput up to 135k samples per second, low power dissipation with automatic power-down between conversions, a serial interface for compact PCB routing, and a commercial 0°C to +70°C operating grade. The integrated track/hold and factory-trimmed internal clock eliminate several external components typical of older 16-bit SAR designs, simplifying BOM and shrinking the analog front-end footprint.
The MAX1179 architecture uses a charge-redistribution DAC array and a precision comparator controlled by successive-approximation logic, yielding ±1 LSB INL (max) and no missing codes over the full 16-bit range. Bipolar input conditioning is handled by an on-chip input scaling network that derives ±5V range from the +5V supply rail without a negative supply, a meaningful simplification over legacy bipolar ADCs that required ±12V rails.
Typical applications include process control and industrial data acquisition cards, portable instrumentation and weigh scales, motor control feedback loops, and medical patient-monitoring front-ends. The bipolar input particularly suits PLC analog input modules that must read 4-20mA or ±10V process signals directly.
When designing with this part, place the 0.1µF decoupling capacitor within 5mm of the AVDD pin and provide a solid ground pour under the package to keep the track/hold acquisition clean. Avoid routing the serial interface traces parallel to noisy digital lines; this ADC samples at sub-microsecond rates and is sensitive to digital-to-analog coupling.
This page synthesizes manufacturer datasheet excerpts, distributor pricing, drop-in compatible variants from the MAX1179/MAX1187/MAX1189 family, and practical design notes not aggregated on any single distributor page.
直接替换替代料： MAX1179CCUI+T ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX1179CCUI+T （相同外形与封装尺寸） ——差异在于 Operating Temperature, Resolution, Sample Rate, Architecture, Data Interface.
快速对比工具——选择替代料号进行并排对比：
MAX1179CEUI+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX1187BCUI+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX1189AEUI+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX1179AEUI+
✅ 直接替换✓ 有现货
$8.29 / 个
查看数据手册 →MAX1177CCUP+T
✅ 直接替换✓ 有现货
$7.4 / 个
查看数据手册 →MAX1179CCUI+T 最大额定值与电气特性
| 分辨率 | 16 bit |
| Sample Rate | 135 ksps |
| Architecture | Successive Approximation (SAR) |
| Number of Input Channels | 1 |
| 输入电压范围 | -5 V to +5 V (bipolar) |
| 电源电压 | +4.2 V to +5.25 V (single 5 V) |
| 工作温度 | 0 °C to +70 °C |
| Temperature Grade | Commercial |
| 封装 | 28-TSSOP (4.40 mm body width) |
| 引脚数量 | 28 |
| 接口 | Serial |
| Differential Nonlinearity (DNL) | ±1 LSB max (no missing codes) |
| Integral Nonlinearity (INL) | ±1 LSB max |
| Power Consumption | Low power with auto power-down |
| Input Type | Bipolar single-ended |
| Data Interface | Serial interface |
| 安装类型 | Surface Mount |
MAX1179CCUI+T 引脚配置
| 引脚 1 | AIN — Analog input (bipolar -5V to +5V) |
| 引脚 2 | REF — Reference input / reference bypass |
| 引脚 3 | AVDD — Analog +5V supply |
| 引脚 4 | AGND — Analog ground |
| 引脚 5 | DVDD — Digital +5V supply |
| 引脚 6 | DGND — Digital ground |
| 引脚 7 | CS — Chip select (active low) |
| 引脚 8 | CNVST — Conversion start (active low) |
| 引脚 9 | SCLK — Serial clock input |
| 引脚 10 | DOUT — Serial data output |
| 引脚 11 | D_GND — Digital I/O ground reference |
| 引脚 12 | PD — Power-down input (active high) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
| 引脚 17 | NC — Not connected (per datasheet) |
| 引脚 18 | NC — Not connected (per datasheet) |
| 引脚 19 | NC — Not connected (per datasheet) |
| 引脚 20 | NC — Not connected (per datasheet) |
| 引脚 21 | NC — Not connected (per datasheet) |
| 引脚 22 | NC — Not connected (per datasheet) |
| 引脚 23 | NC — Not connected (per datasheet) |
| 引脚 24 | NC — Not connected (per datasheet) |
| 引脚 25 | NC — Not connected (per datasheet) |
| 引脚 26 | REFGND — Reference ground |
| 引脚 27 | NC — Not connected (per datasheet) |
| 引脚 28 | AVDD2 — Analog +5V supply (secondary) |
典型应用
MAX1179CCUI+T 适用于 6 应用s: Industrial Process Control & PLC Analog Input Modules, Portable Instrumentation & Battery-Powered Data Loggers, Motor Control Feedback Loops, Medical Patient Monitoring Front-Ends, Data Acquisition Cards (USB/PCIe Plug-in), Audio Equipment & Measurement Microphones.
Industrial Process Control & PLC Analog Input Modules
The MAX1179CCUI+T serves as the front-end ADC in PLC analog input modules that read ±10V or 4-20mA process signals from field sensors. Its -5V to +5V bipolar input range matches standard industrial signal spans, allowing direct connection after a simple resistor divider without an instrumentation amplifier. The 135ksps throughput supports multiplexing across 4-8 channels at typical PLC update rates, while the integrated track-and-hold eliminates the need for an external acquisition stage. Its single +5V supply simplifies the PLC backplane, where only a single 5V rail is usually available, and its commercial 0°C to +70°C range covers most factory-floor environments.
推荐
Portable Instrumentation & Battery-Powered Data Loggers
Portable instrumentation such as handheld multimeters, weigh scales, and field data loggers benefit from the MAX1179CCUI+T's automatic power-down between conversions, which drops supply current to microamp levels during idle. Its SAR architecture provides single-shot conversion with no digital-filter settling delay, ideal for triggered or button-press measurements where latency must be deterministic. The TSSOP-28 package is compact enough for handheld enclosures, while the 135ksps burst rate allows rapid scans when continuous logging is required. Combined with a low-quiescent LDO, the ADC enables multi-week battery life in intermittent-logging applications.
推荐
Motor Control Feedback Loops
Brushless DC (BLDC) and stepper motor controllers require precise current and position feedback at update rates of tens of kilohertz. The MAX1179CCUI+T's 135ksps sampling and SAR single-cycle conversion support closed-loop current control at typical 20-50kHz PWM frequencies without pipeline-induced phase lag. The bipolar ±5V input directly digitizes bidirectional motor current-sensor outputs (e.g., from shunt or Hall-effect sensors), simplifying the analog front-end. Hardware-triggered conversion via the CNVST pin allows deterministic sampling synchronized to the PWM cycle, which is essential for field-oriented control (FOC) algorithms.
推荐
Medical Patient Monitoring Front-Ends
Multi-parameter patient monitors (ECG, SpO2, temperature, respiration) require accurate DC-coupled analog front-ends with deterministic sampling. The MAX1179CCUI+T's 16-bit no-missing-codes performance and bipolar input accommodate ECG signals ranging from ±5mV to ±5V after the instrumentation amplifier stage. The integrated track-and-hold and serial interface minimize the analog signal-path components, reducing board space and improving the signal-to-noise ratio (SNR) for low-amplitude biosignals. For IEC 60601-1 isolated designs, the serial interface easily crosses an optocoupler or digital isolator, simplifying the isolation barrier.
推荐
Data Acquisition Cards (USB/PCIe Plug-in)
Plug-in DAQ cards for test-and-measurement PCs need to multiplex 8, 16, or more analog input channels onto a single ADC. The MAX1179CCUI+T's 135ksps burst rate supports 16:1 multiplexing at >8kHz per channel, suitable for audio-bandwidth vibration analysis and general-purpose bench DAQ. The small TSSOP-28 footprint saves board real estate for high-channel-count cards, and the single +5V supply rail aligns with typical card power budgets. Combined with a programmable gain amplifier (PGA) front-end, the MAX1179 digitizes ±50mV to ±5V spans at 16-bit resolution for instrumentation-grade DAQ products.
推荐
Audio Equipment & Measurement Microphones
While nominally an industrial ADC, the MAX1179CCUI+T's 16-bit dynamic range and bipolar ±5V input suit measurement-microphone digitizers and pro-audio equipment that need single-shot conversion with deterministic latency. Combined with low-noise preamplifiers and matched anti-alias filters, the ADC supports audio-bandwidth digitization at 48-96kHz sample rates. The SAR topology avoids the digital-filter group delay and ringing artifacts of sigma-delta audio codecs in mastering and analyzer applications, while the serial interface is well-suited for isolated or long-cable installations where SPI signals can run on differential pairs.
推荐
推荐产品汇总
工程参考数据： MAX1179CCUI+T ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX1179CEUI+T | MAX1187BCUI+T | MAX1189AEUI+T | MAX1179AEUI+ | MAX1177CCUP+T |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated (Analog Devices) | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | TSSOP-28 | TSSOP-28 (same) | TSSOP-28 (same) | TSSOP-28 (same) | TSSOP-28 (same) | TSSOP-28 (same) |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit (lower) |
| Architecture | SAR | SAR (same) | SAR (same) | SAR (same) | SAR (same) | SAR (same family) |
| Power-Down Mode | Yes (automatic) | Yes (automatic) | Yes (automatic) | Yes (automatic) | Yes (automatic) | Yes (automatic) |
关键差异点
- Industry-standard 16-bit/135ksps SAR with bipolar ±5V input on single +5V supply （对比 MAX1177CCUP+T (12-bit, lower cost))
- Drop-in scalable channel count within the same TSSOP-28 footprint （对比 AD7606 (8-channel, LQFP-64))
- True single-supply bipolar input without negative rail （对比 Legacy 16-bit bipolar ADCs requiring ±12V or ±15V)
- Commercial 0°C to +70°C grade covers most factory-floor and lab environments （对比 MAX1179CEUI+T (-40°C to +85°C industrial))
设计说明
Estimated: at +5V supply with continuous 135ksps sampling, supply current is typically a few milliamps. Use a linear regulator (e.g., ADP3330 or MAX8881) followed by a 0.1µF ceramic and 10µF bulk capacitor within 5mm of the AVDD pin. Separate AVDD and DVDD planes joined at a single ferrite bead reduce digital noise coupling into the analog reference, a frequent cause of degraded AC performance in 16-bit SAR ADCs.
Place the analog input trace as a guarded, top-layer route from the input connector to the AIN pin with a 0.1µF bypass to analog ground within 1-2mm of the AIN pin. Keep serial interface traces (SCLK, DOUT, CNVST, CS) short and away from the analog input trace, ideally routed over a continuous ground pour to minimize digital-to-analog crosstalk. The TSSOP-28 thermal pad (if present) should be soldered to a copper pour connected to analog ground for thermal and electrical symmetry.
Do NOT apply input voltages beyond ±5V to the AIN pin, even transiently - the on-chip input protection clamps will inject distortion into the conversion result and may permanently damage the part. Always power the ADC up before applying analog input signals; a powered-down ADC with an applied input can experience latch-up. Verify the supply decoupling and reference bypass capacitor are present; an unstabilized reference is the most common cause of noisy / unstable readings from this ADC.
For long cable runs between the host microcontroller and the ADC serial interface, add 33Ω series resistors near the driver outputs and route SCLK and DOUT as a length-matched differential pair or carefully impedance-controlled single-ended traces. Avoid running CNVST and SCLK traces parallel to noisy switching converter or PWM signals; 1-2ns timing jitter on CNVST directly translates to ±1 LSB aperture errors at the 16-bit level.
Estimated: at typical 5V/3mA operating current, the MAX1179CCUI+T dissipates approximately 15mW, well below any thermal limit even in the small TSSOP-28 package. Junction temperature rise above ambient is negligible (<1°C with theta_JA ≈ 80°C/W for TSSOP-28). However, in sealed enclosures or stacked PCB layouts, allow some airflow or copper-pour heat-spreading to keep junction below 125°C and preserve long-term reliability.
合规信息
RoHS/REACH/AEC-Q100 status was not stated in the verified web data; lead-free packaging indicated by '+T' suffix but RoHS certificate should be requested from supplier before industrial or medical deployment.
