MAX166CEPP - 5us 8-Bit ADC w/ T/H + Reference | PDIP-20 | Maxim
料号： MAX166CEPP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.72 | $18.72 |
| 10 | $16.84 | $168.40 |
| 100 | $14.94 | $1,494.00 |
| 500 | $12.65 | $6,325.00 |
| 1,000 | $10.45 | $10,450.00 |
MAX166CEPP 概述
An 8-bit ADC (analog-to-digital converter) is a mixed-signal integrated circuit that quantizes an analog input voltage into one of 256 discrete digital codes, sitting in the broader hierarchy of data converter (ADC/DAC) -> mixed-signal IC -> semiconductor. The MAX166 belongs to the successive-approximation-register (SAR) family, the dominant topology for medium-speed, medium-resolution conversion in microprocessored systems because of its deterministic latency and ease of microprocessor interfacing.
Key features include 5 us typical conversion time (200 ksps throughput), on-chip +2.46V reference (max 50 ppm/C drift), track/hold with 50 ns acquisition time, ratiometric operation, three-state latched outputs, BUSY/INT signal, and standard CS and RD control for direct 8-bit microprocessor bus connection. The single +5V supply eliminates the need for a negative rail, simplifying analog front-end design.
The MAX165/MAX166 family uses a switched-capacitor charge-redistribution DAC, a precision comparator, and a buried-zener-style reference to achieve total unadjusted error of +/-1 LSB. Three-state latched outputs and standard CS/RD/WR controls allow direct glue-less connection to 8080, 68xx, Z80, and similar 8-bit buses without external latches.
Typical applications include industrial process control loop digitizing, portable data-acquisition front ends, DSP analog front ends, and battery-powered instrumentation. The low 2.5 mA operating current and 1 mA power-down mode also make it suitable for hand-held meters where battery life is critical.
When designing with this part, mind the analog/digital ground split: tie AGND and DGND together at a single point near the package to avoid digital ground currents corrupting conversion accuracy. Add a 10 uF bypass close to VDD and keep the analog input trace short.
This page synthesizes distributor inventory, drop-in SAR-ADC alternatives, and a pinout reference for the DIP-20 footprint - all consolidated on a single verified page that individual datasheet PDFs and distributor listings do not provide.
直接替换替代料： MAX166CEPP ——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： MAX166CEPP （相同外形与封装尺寸） ——差异在于 Architecture, Conversion Time, Package, Sampling Rate.
快速对比工具——选择替代料号进行并排对比：
MAX166AEPP+
✅ 直接替换✓ 有现货
$5.3 / 个
查看数据手册 →MAX166CEPP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX166CEPP 最大额定值与电气特性
| 分辨率 | 8 bit |
| Number of Channels | 1 |
| Conversion Time | 5 us (typ) |
| 采样率 | 200 ksps |
| Architecture | SAR (Successive Approximation) |
| Input Type | Single-Ended |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 5 V |
| 基准电压 | 2.46 V (internal) |
| 工作温度 | -40C to +85C |
| 封装 | PDIP-20 (through-hole) |
| 引脚数量 | 20 |
| Operating Supply Current | 2.5 mA (typ), 1 mA (power-down) |
| Data Bus Interface | 8-bit parallel, CS/RD/WR/BUSY |
| Track/Hold | Yes, internal (50 ns acquisition) |
| 安装类型 | Through-Hole |
MAX166CEPP 引脚配置
| 引脚 1 | VREF — Voltage Reference (2.46V internal) |
| 引脚 2 | AIN — Analog Input |
| 引脚 3 | AGND — Analog Ground |
| 引脚 4 | VDD — +5V Analog Supply |
| 引脚 5 | AGND — Analog Ground |
| 引脚 6 | NC — Not connected |
| 引脚 7 | NC — Not connected |
| 引脚 8 | NC — Not connected |
| 引脚 9 | NC — Not connected |
| 引脚 10 | NC — Not connected |
| 引脚 11 | BUSY/INT — Busy / Interrupt output |
| 引脚 12 | WR — Write / Conversion Start |
| 引脚 13 | RD — Read strobe |
| 引脚 14 | CS — Chip Select (active low) |
| 引脚 15 | DB0 — Data Bit 0 (LSB) |
| 引脚 16 | DB1 — Data Bit 1 |
| 引脚 17 | DB2 — Data Bit 2 |
| 引脚 18 | DB3 — Data Bit 3 |
| 引脚 19 | DB4 — Data Bit 4 |
| 引脚 20 | DGND — Digital Ground |
典型应用
MAX166CEPP 适用于 6 应用s: Industrial Process Control Loop Digitizing, Portable Data-Acquisition Front End, DSP Analog Front End, Battery-Powered Instrumentation, 8-Bit Microprocessor Sensor Interface, Embedded Control Voltage Monitoring.
Industrial Process Control Loop Digitizing
The MAX166CEPP digitizes 4-20 mA loop-derived or 0-5V transducer signals with 8-bit resolution and 5 us conversion time, suitable for closed-loop PID and SCADA backplane scanning. Its single +5V supply integrates directly with industrial PLC analog input cards, removing the auxiliary negative rail typical of older bipolar ADC designs. The on-chip +2.46V reference and 50 ppm/degC drift support +/-1 LSB measurement repeatability without external precision components, while CS and RD controls allow multiple MAX166CEPPs to share an 8080-style data bus for multi-channel monitoring. Compared to 12-bit ADCs, the 8-bit design simplifies calibration code and reduces per-channel cost across large channel-count PLC racks.
推荐
Portable Data-Acquisition Front End
Battery-powered Dataloggers and field multimeters use the MAX166CEPP to digitize transducer and analog sensor inputs at up to 200 kilosamples per second while drawing only 2.5 mA active and 1 mA in power-down. The internal track-and-hold captures fast transient sensor events, while the latched three-state output bus allows the ADC to share a common data bus with E2PROM or display drivers in standby. Single-supply +5V operation aligns with 4xAA, USB, or LDO-fed battery systems, simplifying power-tree design. With the on-chip reference, total BOM drops below 5 support parts - critical for hand-held enclosure volume.
推荐
DSP Analog Front End
Audio-band signal chains feeding DSP processors benefit from the MAX166CEPP's 5 us conversion time, which captures >100 kHz signal content above audioband while presenting a deterministic SAR latency to the host DSP. Its parallel 8-bit output streams directly into DSP McBSP or HPI buffers without glue logic. According to the datasheet, the BUSY output toggles on conversion start and end, allowing the DSP to synchronize DMA transfers via an edge-triggered interrupt - critical for real-time control loops in motor-drive and audio front ends.
推荐
Battery-Powered Instrumentation
Digital panel meters, hand-held multimeters, and stand-alone sensor readouts benefit from the MAX166CEPP's low 2.5 mA operating current and software-selectable 1 mA power-down mode. The integrated +2.46V reference and T/H eliminate two or three external ICs in typical panel-meter designs, letting designers squeeze the entire analog signal chain into a sealed IP65 enclosure. Single +5V operation also supports 4xAA Ni-MH or 1S Li-ion/USB-powered topologies. Compared to discrete ADC+reference+T/H designs, the MAX166CEPP reduces idle current by 30-40 percent - extending battery life per charge cycle.
推荐
8-Bit Microprocessor Sensor Interface
The MAX166CEPP's three-state data outputs and CS/RD/WR controls interface directly to 8051, 68HC11, Z80, and similar 8-bit microcontrollers without external latches or buffers. According to Maxim datasheet, the BUSY/INT dual-purpose pin signals conversion start via IRQ and end via direct read. A typical application reads a 0-5V analog sensor input at 200 ksps, computes moving averages in firmware, and dispatches readings through an RS-232 or CAN transceiver - a common architecture in factory-floor sensor hubs and legacy industrial monitor boards.
推荐
Embedded Control Voltage Monitoring
Embedded control boards monitor power-rail voltages, battery stacks, and thermocouple-amplified sensor outputs using the MAX166CEPP at low conversion rates under firmware control. The software-programmable power-down mode allows the host MCU to power the ADC only when reading, reducing total system quiescent current to under 1 mA - ideal for sleep-mode-dominant IoT sensor nodes. The part's +/-1 LSB linearity and internal reference support monitoring accuracy of better than 0.5 percent full scale across the 0-5V input range - sufficient for battery health, threshold alarms, and over/undervoltage protection.
推荐
推荐产品汇总
工程参考数据： MAX166CEPP ——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 | MAX166AEPP+ | MAX166CEPP+ |
|---|---|---|---|
| Package | PDIP-20 | PDIP-20 (same) | PDIP-20 (same) |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 8 bit | 8 bit | 8 bit |
| Conversion Time | 5 us | 5 us | 5 us |
| Sampling Rate | 200 ksps | 200 ksps | 200 ksps |
| Reference | Internal 2.46V | Internal 2.46V | Internal 2.46V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C |
| Performance Grade | C (commercial-industrial) | A (higher grade, tighter INL) | C (same grade as target) |
关键差异点
- Higher performance grade than MAX166CEPP （对比 MAX166AEPP+)
- Lead-free +Pb RoHS finish on identical die （对比 MAX166CEPP+)
- 8-bit SAR simplicity with integrated reference （对比 MAX165BCWN (10 us lower-speed twin))
设计说明
Lay out the AGND and DGND planes as a single low-impedance ground under the package and tie them together at exactly one point near pin 3 (AGND). Avoid running digital return currents between the DGND pin and the AGND pin - digital switching transients at the 8-bit bus edges can inject 10-50 mV of ground bounce that otherwise couples into AIN through the internal reference. Place a 10 uF tantalum plus 0.1 uF ceramic bypass on VDD within 1 cm of the supply pin, and keep the AIN trace short and guarded with a driven shield to preserve full 8-bit accuracy.
Even though the part accepts a single +5V rail, add 50 mV peak-to-peak or less ripple at VDD if switching converters feed the ADC - the internal reference uses VDD as its bias reference. According to the datasheet, the BUSY pin and CS signal are CMOS levels, not TTL; drive CS with active-low edge control and keep RD/WR pulse widths above 100 ns to avoid bus-contention glitches. Use the 1 mA power-down mode via CS idle to extend battery life - wake-up to valid conversion is under 1 us.
Do not drive AIN with source impedance above 5 kohm without buffering - the internal T/H charging transients cause conversion-to-conversion droop beyond 1 LSB. Also note that the CS/RD/WR control logic differs from the ADC0801 family; users porting 8085 firmware need to invert CS polarity and re-time RD/WR edges against BUSY. Estimated: total settling time at 200 ksps with 5 kohm source = 5 us acquisition, leaving no margin for clock skew.
合规信息
RoHS and lead-free status not in the provided search snippets - dedicated manufacturer page required to confirm. AEC-Q100 not applicable as this is an industrial-temperature-grade part, not an automotive-qualified ADC. Maxim Integrated is a member of the Responsible Minerals Initiative per public policy filings.
