MAX196AENI - 12-Bit 6-Ch 100ksps Precision ADC | Maxim Integrated
MPN： MAX196AENI ✗ 停產MAX196AENI 概覽
A Data Acquisition System (DAS) is an integrated subsystem that combines analog input multiplexing, sample-and-hold, ADC conversion, and a digital interface in a single IC, eliminating the need for the designer to pair a discrete mux, S/H, and ADC. The MAX196 belongs to the precision SAR-ADC > multi-channel DAS > data-converter > signal-chain IC product hierarchy. The DAS sits between sensors/transducers and the host microcontroller or DSP, providing a clean digital representation of multiple analog signals with high noise immunity and bus-friendly I/O.
Key differentiating features include 6 input channels in a single device (vs. typical 1 or 2 for standalone ADCs), software-programmable input ranges via internal PGA/scaling, a built-in track-and-hold and 4.096V reference, a 100 ksps conversion rate at ±1/2 LSB linearity, and a parallel 12-bit/8-bit bus interface that drops directly onto most 80xx-family microprocessors. The device operates from a single +5V supply and consumes 60 mW typical during conversion. TTL/CMOS-compatible I/O simplifies interface to modern MCUs without level shifters.
Typical applications include process control, industrial data acquisition, instrumentation, automated test equipment (ATE), and embedded sensor monitoring. The parallel bus interface makes it particularly well suited to legacy 80xx designs and DSPs needing fast multi-channel capture, while the wide input-range flexibility lets a single board accept 4-20mA, 0-10V, and bipolar transducer outputs without external signal conditioning.
A design consideration: the parallel interface consumes many MCU pins, so consider an SPI-based successor such as MAX197 or MAX1300-series parts for new designs with pin constraints. Decouple the supply with a 0.1uF ceramic plus a 10uF tantalum adjacent to the +5V and DGND pins.
直接替換替代品，適用於 MAX196AENI — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MAX196AENI （相同外形與佔位） — 差異在於 Data Interface, Input Ranges, Integral Nonlinearity (INL), Internal Reference, Operating Temperature.
MAX196ACNI
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX196BCNI+
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX196BENI
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX196AENI+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX196ACAI
✅ 直接替換聯絡詢價
查看資料表 →MAX196AENI 最大額定值與電氣特性
| Part Number | MAX196AENI |
| Manufacturer | Maxim Integrated (now Analog Devices) |
| 功能 | 12-Bit Data Acquisition System (DAS) with parallel bus interface |
| 解析度 | 12 bits |
| Number of Input Channels | 6 (single-ended) or 6 pseudo-differential |
| Sample Rate | 100 ksps |
| Architecture | SAR (Successive Approximation) |
| 供應電壓 | +5 V single supply |
| Input Ranges | 0 to +5V, 0 to +10V, +/-5V, +/-10V, 0 to +4.18V (software-programmable) |
| Data Interface | 12-bit parallel bus (also byte-selectable for 8-bit µP) |
| Integral Nonlinearity (INL) | +/-1 LSB (max) |
| Power Consumption | 60 mW typical (operating), 50 µA (power-down) |
| Internal Reference | 4.096 V |
| 工作溫度 | -40C to +85C (industrial) |
| 封裝 | 28-pin PDIP (N), through-hole |
| I/O Compatibility | TTL/CMOS |
MAX196AENI 腳位配置
| 腳位 1 | AIN0 — Analog input channel 0 |
| 腳位 2 | AIN1 — Analog input channel 1 |
| 腳位 3 | AIN2 — Analog input channel 2 |
| 腳位 4 | AIN3 — Analog input channel 3 |
| 腳位 5 | AIN4 — Analog input channel 4 |
| 腳位 6 | AIN5 — Analog input channel 5 |
| 腳位 7 | D0 — Data bit 0 (LSB) |
| 腳位 8 | D1 — Data bit 1 |
| 腳位 9 | D2 — Data bit 2 |
| 腳位 10 | D3 — Data bit 3 |
| 腳位 11 | D4 — Data bit 4 |
| 腳位 12 | D5 — Data bit 5 |
| 腳位 13 | D6 — Data bit 6 |
| 腳位 14 | D7 — Data bit 7 |
| 腳位 15 | D8 — Data bit 8 |
| 腳位 16 | D9 — Data bit 9 |
| 腳位 17 | D10 — Data bit 10 |
| 腳位 18 | D11 — Data bit 11 (MSB) |
| 腳位 19 | GND — Digital ground |
| 腳位 20 | REF — Reference bypass / external reference input |
| 腳位 21 | AVDD — +5V analog supply |
| 腳位 22 | AGND — Analog ground |
| 腳位 23 | CLK — External clock input |
| 腳位 24 | WR — Write / start conversion (active low) |
| 腳位 25 | RD — Read output enable (active low) |
| 腳位 26 | HBEN — High-byte enable for 8-bit µP (selects MSB/LSB) |
| 腳位 27 | INT — Interrupt output - end of conversion |
| 腳位 28 | VDD — +5V digital supply |
典型應用
MAX196AENI 適用於 6 應用s: Industrial Process Control / PLC Analog Input, Automated Test Equipment (ATE) / Multi-Channel Instrumentation, Embedded Sensor Monitoring / Data Logging, Audio / Vibration Signal Acquisition, Medical Patient Monitoring / Instrumentation Front-End, Legacy 80xx Microprocessor / Digital Signal Processor Backplanes.
Industrial Process Control / PLC Analog Input
The MAX196AENI's ±10V and 0-10V input ranges match industrial transducer outputs directly, eliminating external signal conditioning for pressure, flow, and level transmitters. With 6 channels per chip, a single device handles multi-loop PLC acquisition, while the parallel 12-bit/8-bit bus drops onto legacy PLC backplanes without a serial-to-parallel translator. At 100 ksps the throughput exceeds typical process-loop bandwidths (sub-1 ksps), leaving headroom for oversampling and averaging to improve effective resolution in noisy factory environments.
推薦
Automated Test Equipment (ATE) / Multi-Channel Instrumentation
The MAX196AENI's six channel-muxed inputs and 100 ksps SAR throughput make it a fit for legacy parallel-bus ATE cards multiplexing several DUT stimulus-response nodes. The internal 4.096 V reference provides a stable full-scale, while ±1 LSB INL keeps measurement repeatability inside typical ATE tolerance bands. The TTL/CMOS-compatible parallel interface simplifies timing closure with traditional microprocessor-based testers (8051/80186/80C196), reducing board complexity and firmware overhead.
推薦
Embedded Sensor Monitoring / Data Logging
Embedded sensor boards can use the MAX196AENI to digitize six analog sensors (temperature, strain, light, pressure) simultaneously and report them over a parallel bus to a host microcontroller. The five software-selectable ranges (0 to +5V, 0 to +10V, ±5V, ±10V, 0 to +4.18V) allow a single board to accept varied transducer outputs without changing BOM, and the 50 µA power-down mode supports battery-powered data loggers. The DIP package is through-hole-friendly for hand-prototyped and educational boards.
推薦
Audio / Vibration Signal Acquisition
Although dedicated audio ADCs exist, the MAX196AENI's 100 ksps and ±10V bipolar range are usable for vibration and analysis-bandwidth acquisition where the signal fits within 12 bits of dynamic range. The internal PGA removes external instrumentation amplifiers for piezotronic sensor chains. For higher dynamic range, typical designs pair the MAX196 with a precision op-amp (MAX4475) to drive the input, and use multiple channels for multi-axis accelerometer data capture up to several kHz of bandwidth per channel.
推薦
Medical Patient Monitoring / Instrumentation Front-End
The MAX196AENI's multi-channel input multiplexer suits medical front-end modules that need to combine ECG, SpO2 analog conditioning, respiration, and temperature signals into one digitizer. Its ±1 LSB INL is sufficient for non-critical patient monitoring; for diagnostic-grade equipment the modern MAX11270 or MAX11136 series offers 20-bit precision and integrated PGA. Designers must still implement IEC 60601 isolation and patient-leakage current compliance themselves; the MAX196 is a building block, not a complete medical subsystem.
推薦
Legacy 80xx Microprocessor / Digital Signal Processor Backplanes
The MAX196AENI was designed with a 12-bit parallel bus that drops directly onto 80xx-family and early DSP memory-mapped data buses. The byte-select HBEN pin lets 8-bit µP read the LSB or MSB half of the conversion, simplifying timing for 80186/8051 systems where the external memory bus is 8 or 16 bits. This makes the MAX196 ideal as a parallel-channel data-acquisition front-end for retro and industrial control SBCs; modern systems would migrate to SPI ADCs (MAX197/MAX1300) to save pins.
推薦
推薦產品摘要
工程參考資料，適用於 MAX196AENI — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MAX196ACNI | MAX196BCNI+ | MAX196BENI | MAX196AENI+ | MAX196ACAI |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) |
| Package | 28-PDIP (N) | 28-PDIP (N) - same | 28-PDIP (N) - same | 28-PDIP (N) - same | 28-PDIP (N) - same | 28-PDIP (N) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Channels | 6 single-ended / 6 pseudo-diff | 6 single-ended / 6 pseudo-diff | 6 single-ended / 6 pseudo-diff | 6 single-ended / 6 pseudo-diff | 6 single-ended / 6 pseudo-diff | 6 single-ended / 6 pseudo-diff |
| Sample Rate | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps |
| Input Range Options | 5 software-programmable ranges | 5 software-programmable ranges | 5 software-programmable ranges | 5 software-programmable ranges | 5 software-programmable ranges | 5 software-programmable ranges |
| Interface | 12-bit parallel bus, 8-bit byte-selectable | 12-bit parallel bus | 12-bit parallel bus | 12-bit parallel bus | 12-bit parallel bus | 12-bit parallel bus |
| Supply Voltage | +5V single supply | +5V single supply | +5V single supply | +5V single supply | +5V single supply | +5V single supply |
| Pin Compatibility | 28-DIP base | Drop-in (28-DIP) | Drop-in (28-DIP) | Drop-in (28-DIP) | Drop-in (28-DIP) | Drop-in (28-PDIP) |
主要差異化特點
- 6 independent analog input channels plus programmable 12-bit SAR ADC integrated into a single 28-PDIP (對比MAX1062)
- Five software-programmable input ranges (0-5V / 0-10V / +/-5V / +/-10V / 0-4.18V) without external signal conditioning (對比MAX197)
- Integrated track-and-hold and precision internal 4.096V reference within a single IC (對比Discrete mux + S/H + ADC chains (e.g., ADG708 + AD7572))
設計說明
Decouple AVDD (pin 21) with a 0.1uF ceramic capacitor plus a 10uF tantalum placed within 5 mm of the pin. Decouple VDD (pin 28) similarly but with emphasis on low-impedance ground return. During SAR conversion bursts the device draws peak currents; shared digital 5V noise coupling into AVDD will degrade INL. According to the Maxim/ADI datasheet, the 4.096V internal reference is calibrated at this analog supply level, so a dedicated LDO or ferrite-filtered 5V rail is recommended for precision work.
The un-suffixed MAX196AENI is leaded (SnPb) and obsolete; the lead-free RoHS version is MAX196AENI+. Do not substitute with non-A/D dash variants (MAX196AEXX, MAX196AEXN) without confirming the temperature grade, since the commercial (-0 to +70°C) and industrial (-40 to +85°C) parts have different part-number suffixes. According to the Maxim datasheet family, the WR active-low polarity and the HBEN byte-select behavior depend on the variant; verify timing against your software before swapping.
On the 28-pin PDIP layout, route the six AIN traces together with a common analog ground guard to minimize channel-to-channel crosstalk. Place an RC anti-alias filter (typically 1k + 1nF) on each input near the connector, sized for 50 kHz stop band versus 100 ksps Nyquist. The CLK input accepts an external clock up to several MHz; route it away from analog traces and keep its return path short. Estimated: sampling at 100 ksps with a 1k/1nF filter yields -3 dB at 159 kHz, providing a 16x oversampling margin.
合規資訊
Standard un-suffixed MAX196AENI from Maxim (now ADI) is the legacy SnPb-leaded version; the '+' suffix is the RoHS-compliant equivalent. Detailed compliance data for the obsolete un-suffixed version is not consistently reported; consult the manufacturer datasheet ordering information table for current environmental compliance claims on the MAX196AENI+ part.
