MAX1179BCUI+ - 16-Bit 135ksps Bipolar ADC | Maxim Integrated
MPN: MAX1179BCUI+ ✓ Hoạt độngMAX1179BCUI+ Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MAX1179BCUI+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX1179BCUI+ (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Resolution, Input Type, RoHS Status.
MAX1179AEUI+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1187BCUI+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1189BCUI+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1156AEUP+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1165BEUI+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1165ACUI+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1147BEUP+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1179BCUI+ Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 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) |
| Nhiệt độ hoạt động | 0 °C to +70 °C (commercial, BC suffix) |
| Hộp | 28-TSSOP (4.40 mm) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân MAX1179BCUI+
| Chân 1 | AIN — Analog input |
| Chân 2 | AGND — Analog ground |
| Chân 3 | REF — Reference bypass/decoupling |
| Chân 4 | AVDD — +5V analog supply |
| Chân 5 | BIP/UNI — Bipolar/unipolar input range select |
| Chân 6 | CONVST — Conversion start (active low) |
| Chân 7 | CS — Chip select (active low) |
| Chân 8 | RD — Read (active low) |
| Chân 9 | WR — Write (active low) |
| Chân 10 | DGND — Digital ground |
| Chân 11 | DVDD — +5V digital supply |
| Chân 12 | D15 — Data bit 15 (MSB) |
| Chân 13 | D14 — Data bit 14 |
| Chân 14 | D13 — Data bit 13 |
| Chân 15 | D12 — Data bit 12 |
| Chân 16 | D11 — Data bit 11 |
| Chân 17 | D10 — Data bit 10 |
| Chân 18 | D9 — Data bit 9 |
| Chân 19 | D8 — Data bit 8 |
| Chân 20 | D7 — Data bit 7 |
| Chân 21 | D6 — Data bit 6 |
| Chân 22 | D5 — Data bit 5 |
| Chân 23 | D4 — Data bit 4 |
| Chân 24 | D3 — Data bit 3 |
| Chân 25 | D2 — Data bit 2 |
| Chân 26 | D1 — Data bit 1 |
| Chân 27 | D0 — Data bit 0 (LSB) |
| Chân 28 | INT/EXT CLK — Clock select or external clock input |
Ứng dụng tiêu biểu
MAX1179BCUI+ phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX1179BCUI+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- True bipolar ±12V input without external signal conditioning (vsMAX1187BCUI+)
- Industrial temperature grade option in same footprint (vsMAX1179BCUI+ vs MAX1179AEUI+)
- Lower cost vs 250 ksps unipolar alternative when speed not needed (vsMAX1165BEUI+T)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS-compliant per Maxim product marking; REACH, halogen-free, and conflict-minerals status not published in the verified data - contact Maxim/ADI for documentation.
