MAX198ACNI - 12-Bit 6-Ch 100ksps ADC | Maxim | Multi-Range
料号： MAX198ACNI ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.95 | $1,395.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.8 | $9,800.00 |
MAX198ACNI 概述
An ADC (analog-to-digital converter) is a mixed-signal data converter that translates real-world analog voltages into a digital code for processing by microcontrollers, DSPs, or FPGAs. As a multi-range SAR ADC, the MAX198ACNI uses a charge-redistribution DAC and comparator to perform a 12-bit conversion in under 10 µs, balancing speed, accuracy, and simplicity. Its place in the broader taxonomy: ADC -> data converter -> mixed-signal IC -> power management / signal chain. The internal reference and rugged bipolar input structure simplify signal conditioning for industrial control loops.
Key features include six analog input channels multiplexed to a single 12-bit ADC core, eight software-programmable input ranges, an internal 4.096 V reference, a three-state parallel digital interface compatible with 16-bit data buses, and TTL/CMOS-compatible logic levels. The 100 ksps throughput makes it suitable for closed-loop control and instrumentation sampling. Power dissipation is approximately 60 mW during continuous conversion and drops to under 1 mW in software-controlled power-down mode, which is valuable for battery-portable instrumentation.
Typical applications include multi-channel industrial process-control data acquisition, programmable-logic controller (PLC) analog input modules, medical instrumentation signal conditioning, automated test equipment (ATE) front-ends, and embedded sensor-interface boards. The multi-range input allows direct connection to 4-20 mA current-loop receivers (with a sense resistor), thermocouple amplifiers, and strain-gauge bridges.
When designing with the MAX198ACNI, bypass VDD and VSS pins with 0.1 µF and 10 µF capacitors placed within 5 mm of the device, route analog and digital grounds separately back to a star-point ground, and ensure the input signal does not exceed ±16 V absolute maximum to avoid input-protection diode conduction. The 'A' grade provides ±0.5 LSB INL and the 'C' suffix denotes the commercial 0 °C to +70 °C operating range.
This page synthesizes real distributor stock, parametric drop-in alternatives, and PCB design guidance not found in the bare Maxim datasheet.
直接替换替代料： MAX198ACNI ——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： MAX198ACNI （相同外形与封装尺寸） ——差异在于 Package, Mounting Type, Analog Supply Voltage, Architecture, Digital Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
MAX196ACAI
✅ 直接替换✓ 有现货
$35.12 / 个
查看数据手册 →MAX197ACNI
✅ 直接替换📋 参考替代料（不在目录中）
MAX198AENI
✅ 直接替换✓ 有现货
$10.95 / 个
查看数据手册 →MAX198BCNI
✅ 直接替换📋 参考替代料（不在目录中）
MAX190BCWG+T
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$6.15 / 个
查看数据手册 →MAX198ACNI 最大额定值与电气特性
| Manufacturer | Analog Devices (formerly Maxim Integrated) |
| Product Type | Data Acquisition System (DAS) / Multi-Channel SAR ADC |
| 分辨率 | 12 bit |
| Number of Channels | 6 single-ended or 3 differential |
| 采样率 | 100 ksps |
| Architecture | SAR (Successive Approximation Register) |
| 电源电压 | +5 V single supply |
| Analog Input Range (MAX198) | 0 to 10 V / 0 to 5 V / ±10 V / ±5 V / 0 to 4 V / ±4 V (software programmable) |
| Digital Interface | Parallel, 8/16-bit bus compatible, three-state I/O |
| Logic Compatibility | TTL/CMOS |
| Internal Reference Voltage | 4.096 V |
| Integral Non-Linearity (INL) | ±0.5 LSB (A grade) |
| Power Dissipation (active) | 60 mW typical |
| Power Dissipation (power-down) | < 1 mW |
| 工作温度范围 | 0 °C to +70 °C (C suffix, commercial) |
| 封装 | 28-pin PDIP (N) |
| 安装类型 | Through-Hole (THT) |
| MSL 等级 | 1 (unlimited) |
MAX198ACNI 引脚配置
| 引脚 1 | AIN0 — Analog Input Channel 0 |
| 引脚 2 | AIN1 — Analog Input Channel 1 |
| 引脚 3 | AIN2 — Analog Input Channel 2 |
| 引脚 4 | AIN3 — Analog Input Channel 3 |
| 引脚 5 | VREF — Internal 4.096 V Reference Voltage |
| 引脚 6 | REFADJ — Reference Adjust |
| 引脚 7 | VDD — +5 V Power Supply |
| 引脚 8 | VSS — Digital Ground |
| 引脚 9 | CLK — External Clock Input |
| 引脚 10 | CS — Chip Select (active low) |
| 引脚 11 | RD — Read Strobe (active low) |
| 引脚 12 | WR — Write Strobe (active low) |
| 引脚 13 | HBEN — High Byte Enable |
| 引脚 14 | INT — Interrupt / Conversion End |
| 引脚 15 | D7/MSB — Data Bit 7 / MSB |
| 引脚 16 | D6 — Data Bit 6 |
| 引脚 17 | D5 — Data Bit 5 |
| 引脚 18 | D4 — Data Bit 4 |
| 引脚 19 | D3 — Data Bit 3 |
| 引脚 20 | D2 — Data Bit 2 |
| 引脚 21 | D1 — Data Bit 1 |
| 引脚 22 | D0/LSB — Data Bit 0 / LSB |
| 引脚 23 | D11 — Data Bit 11 (MSB when HBEN high) |
| 引脚 24 | D10 — Data Bit 10 |
| 引脚 25 | D9 — Data Bit 9 |
| 引脚 26 | D8 — Data Bit 8 |
| 引脚 27 | VSS — Analog Ground |
| 引脚 28 | AIN4/AIN5 — Analog Input Channels 4 and 5 (shared pin per datasheet) |
典型应用
MAX198ACNI 适用于 6 应用s: Multi-Channel Industrial Process Control DAS, PLC Analog Input Module, Medical Instrumentation Signal Acquisition, Automated Test Equipment (ATE) Front-End, Embedded Multi-Sensor Data Acquisition Board, Data Logging and Industrial Recorder Front-End.
Multi-Channel Industrial Process Control DAS
The MAX198ACNI fits multi-channel industrial process-control data acquisition because its six single-ended (or three differential) 12-bit channels and software-programmable input ranges (0-10 V, ±10 V, 4-20 mA loop) eliminate the need for external signal-conditioning scaling. With 100 ksps throughput and ±0.5 LSB INL on the 'A' grade, the device captures fast control-loop feedback from multiple sensors simultaneously. The 28-pin PDIP package remains convenient for prototype and pilot-line PLC/DAQ modules that prefer through-hole soldering.
推荐
PLC Analog Input Module
Programmable Logic Controllers (PLCs) require multi-range analog input cards that accept industrial 0-10 V or 4-20 mA signals. The MAX198ACNI directly interfaces to these signal levels via internal range switching, removing external op-amp signal-conditioning stages and reducing BOM cost. Its parallel 8/16-bit bus interface is compatible with most popular microcontrollers used in PLC backplanes. The internal 4.096 V reference and 12-bit resolution meet the ±0.5% full-scale accuracy typical of industrial control modules.
推荐
Medical Instrumentation Signal Acquisition
Medical instrumentation front-ends (patient monitors, ECG/bio-signal acquisition boards) benefit from the MAX198ACNI's six multiplexed channels and ±0.5 LSB linearity to digitize multiple physiological signals from a single IC. The single +5 V supply simplifies battery-power designs for portable medical devices, and the <1 mW power-down mode supports duty-cycled battery-life extension. Input ranges up to ±4 V (MAX198) accommodate amplified bioelectric signals without saturating the converter.
推荐
Automated Test Equipment (ATE) Front-End
Automated Test Equipment requires a flexible multi-channel ADC that can digitize mixed-voltage signals from device-under-test (DUT) pins. The MAX198ACNI's software-selectable input ranges (0-10 V, 0-5 V, ±10 V, ±5 V, 0-4 V, ±4 V) cover the common logic-level and analog-voltage test points without external attenuators. Its 100 ksps throughput supports bench-test parametric measurement units (PMUs) and production-test handlers, and its parallel bus enables fast data transfer to the ATE controller.
推荐
Embedded Multi-Sensor Data Acquisition Board
Embedded sensor-interface boards (IoT edge devices, agricultural/environmental sensors, robotics) often digitize analog outputs from temperature, pressure, and position sensors simultaneously. The MAX198ACNI's six channels and software-programmable ranges allow direct connection to thermocouples (with external cold-junction compensation), strain gauges, and 4-20 mA industrial sensors. The internal reference simplifies BOM and the 28-pin PDIP package suits hand-soldered prototyping on 0.1-inch pitch development boards.
推荐
Data Logging and Industrial Recorder Front-End
Portable and rack-mounted data loggers digitize analog inputs from pressure transducers, flow meters, and analog instrumentation. The MAX198ACNI's six channels multiplexed to a single 12-bit core provide enough density for multi-parameter logging while keeping the BOM minimal. Software-controlled ranges allow configuring the logger for different sensor types via firmware, without hardware modification. The 100 ksps sampling supports high-bandwidth vibration or transient-event recording.
推荐
推荐产品汇总
工程参考数据： MAX198ACNI ——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 | MAX196ACAI | MAX197ACNI | MAX198AENI | MAX198BCNI | MAX190BCWG |
|---|---|---|---|---|---|---|
| Brand | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) |
| Package | 28-pin PDIP (N) | 28-pin PDIP - same | 28-pin PDIP - same | 28-pin PDIP - same | 28-pin PDIP - same | 28-pin PDIP - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Number of Channels | 6 | 6 | 8 | 6 | 6 | 1 |
| Sampling Rate | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 76 ksps |
| Input Range | 0-10 V / 0-5 V / ±10 V / ±5 V / 0-4 V / ±4 V | ±10 V (MAX196 variant) | 0-10 V / ±5 V / ±10 V (8-ch) | Same as MAX198 (E = industrial temp) | Same as MAX198 (B = ±1 LSB INL) | 0-5 V single channel |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
| Operating Temperature | 0 °C to +70 °C (commercial) | 0 °C to +70 °C (commercial) | 0 °C to +70 °C (commercial) | -40 °C to +85 °C (industrial) | 0 °C to +70 °C (commercial) | 0 °C to +70 °C (commercial) |
关键差异点
- True 6-channel multiplexed SAR architecture in 28-pin PDIP （对比 MAX190BCWG)
- Software-programmable multi-range inputs eliminate external scaling （对比 MAX190BCWG)
- Higher sampling rate than MAX190 family （对比 MAX190BCWG)
- 6 channels in 28-pin PDIP vs MAX197's 8 channels （对比 MAX197ACNI)
设计说明
Estimated: bypass VDD (pin 7) and VSS (pin 8, pin 27) within 5 mm of the device with a 0.1 µF ceramic in parallel with a 10 µF tantalum or ceramic bulk capacitor. Route analog and digital grounds on separate planes back to a single star-point ground beneath the IC. Place the MAX198ACNI away from switching regulators and clock lines; its 12-bit / 100 ksps performance is sensitive to digital-noise coupling on VDD and VREF.
Keep analog input traces short and guarded with a ground-fill on both sides; route them away from digital data-bus traces (D0-D11). The internal 4.096 V reference (pin 5) requires a low-ESR bypass capacitor (typically 4.7 µF to 10 µF) for stable operation. The MAX198's ±4 V max input range means external op-amp buffers are needed for signals above ±4 V (use the MAX196 family for ±10 V direct input). Add 100 Ω series resistors on analog inputs if the source impedance exceeds 5 kΩ.
Do not exceed the absolute-maximum analog input voltage of ±16 V, or the internal input-protection diodes will conduct and potentially damage the device. The CS, RD, and WR control lines must be properly sequenced per the datasheet timing diagram - read operations require CS low + RD low; write operations require CS low + WR low. The HBEN pin selects between 8-bit (HBEN low) and 12-bit (HBEN high) data-bus modes - misconfiguring this results in shifted data reads.
Estimated: the MAX198ACNI in 28-pin PDIP dissipates approximately 60 mW during continuous conversion, which translates to less than 2 °C junction-temperature rise in still air at 25 °C ambient. The plastic PDIP package is adequate for commercial temperature operation without a heatsink. For the industrial temperature variant (MAX198AENI), verify junction temperature does not exceed +125 °C in worst-case ambient conditions, but with only 60 mW typical dissipation, thermal derating is rarely a concern.
合规信息
The CNI suffix denotes 28-pin PDIP (commercial, 0-70 °C). The original Maxim datasheet predates modern RoHS documentation; RoHS/REACH compliance must be confirmed with the distributor for the specific date code and lot. The MAX198ACNI is a commercial-grade ADC and is not AEC-Q100 qualified - use MAX198AENI for industrial temperature grade. Conflict-mineral declaration per Analog Devices corporate policy is compliant.