MAX166AEPP+ - 8-Bit 200ksps ADC, 5μs, +5V, PDIP-20 | Maxim
MPN： MAX166AEPP+ ✗ 停產MAX166AEPP+ 概覽
A successive-approximation ADC (SAR ADC) is a type of analog-to-digital converter that uses a binary-search algorithm against an internal DAC to digitize an analog input. SAR ADCs sit within the broader ADC family, between flash converters (fastest, lowest resolution) and sigma-delta converters (highest resolution, lowest speed). They are the workhorse choice for 8 to 16-bit general-purpose data acquisition, multiplexing, industrial control, and embedded instrumentation because they deliver a clean single-shot latency, deterministic timing, and low power. The MAX166AEPP+ belongs to this family, occupying the high-speed, moderate-resolution end of the spectrum.
Key features of the MAX166AEPP+ include ±1 LSB total unadjusted error, a 2.46V internal reference with ±1.5% accuracy, ±5V input range with software-configurable unipolar/bipolar modes, and ratiometric conversion capability. Standard CS and RD control signals provide direct interface to 8-bit microprocessors, with a BUSY output flagging conversion start and end. The latched, three-state buffered outputs allow direct connection to a microprocessor data bus without external glue logic.
Typical applications include digital signal processing, high-speed data acquisition, telecomm digitizing, process control, and instrumentation-grade analog front ends. The internal reference and T/H make it suitable for systems where board area and external BOM count must be minimized.
When designing with this part, ensure the analog input signal bandwidth is below the T/H acquisition limit and that the +5V supply is well decoupled. The 5 μs conversion time directly limits maximum sample rate to 200 ksps.
直接替換替代品，適用於 MAX166AEPP+ — 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： MAX166AEPP+ （相同外形與佔位） — 差異在於 Conversion Time, Package, Architecture, Analog Supply Voltage, Data Interface.
MAX166BEPP+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX166CCPP+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX166ACPP+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX166AEPP
✅ 直接替換📋 參考替代品（不在目錄中）
MAX166AMPP/883B
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX166AEPP+ 最大額定值與電氣特性
| 解析度 | 8 bit |
| Architecture | Successive Approximation (SAR) with Track/Hold |
| 取樣率 | 200 ksps (max) |
| Conversion Time | 5 µs (max) |
| Number of Channels | 1 |
| 輸入電壓範圍 | 0 V to +5 V (unipolar); ±5 V (bipolar mode) |
| 供應電壓 | +5 V (±5%) |
| Internal Reference Voltage | +2.46 V |
| Reference Accuracy | ±1.5% |
| Total Unadjusted Error (TUE) | ±1 LSB (max) |
| Analog Input Bandwidth | Up to 50 kHz full-scale (386 mV/µs slew) |
| Data Interface | Parallel, 8-bit, three-state latched outputs |
| Logic Compatibility | CMOS-/TTL-compatible I/O |
| 封裝 | PDIP-20 (0.300 inch, through-hole) |
| Operating Temperature Grade | Industrial (E suffix) |
| RoHS 狀態 | unknown |
MAX166AEPP+ 腳位配置
| 腳位 1 | AIN — Analog input |
| 腳位 2 | REF — Reference voltage input/output (+2.46V internal) |
| 腳位 3 | BIP/UNI — Bipolar/Unipolar mode select |
| 腳位 4 | AGND — Analog ground |
| 腳位 5 | D0 — Data output bit 0 (LSB) |
| 腳位 6 | D1 — Data output bit 1 |
| 腳位 7 | D2 — Data output bit 2 |
| 腳位 8 | D3 — Data output bit 3 |
| 腳位 9 | D4 — Data output bit 4 |
| 腳位 10 | D5 — Data output bit 5 |
| 腳位 11 | D6 — Data output bit 6 |
| 腳位 12 | D7 — Data output bit 7 (MSB) |
| 腳位 13 | DGND — Digital ground |
| 腳位 14 | VLOGIC — Logic supply voltage |
| 腳位 15 | VDD — +5V analog supply |
| 腳位 16 | RD — Read control input (active low) |
| 腳位 17 | CS — Chip select (active low) |
| 腳位 18 | BUSY — Conversion in progress indicator (active high) |
| 腳位 19 | MODE — Mode control / conversion start |
| 腳位 20 | CLK — Clock input |
典型應用
MAX166AEPP+ 適用於 7 應用s: High-Speed Data Acquisition, Process Control & Industrial Automation, DSP Front End & Digital Signal Processing, Telecomm & Audio Digitizing, Portable Instrumentation & Battery-Powered Measurement, Legacy Microprocessor Data Bus Interface, Automotive & Avionics Sensor Digitizing.
High-Speed Data Acquisition
The MAX166AEPP+ fits high-speed single-channel data acquisition where 8-bit resolution and 200 ksps throughput are sufficient, with its 5 µs conversion time and integrated track-and-hold. The internal +2.46V reference eliminates external reference components, and the parallel 8-bit bus interface connects directly to a microprocessor data bus without glue logic. The T/H bandwidth of 50 kHz full-scale preserves signal integrity for process-control and instrumentation-grade front ends. Place the part near the analog source with proper ground-plane isolation to minimize digital coupling.
推薦
Process Control & Industrial Automation
Industrial process control loops require deterministic single-shot latency, which the MAX166AEPP+'s SAR architecture provides with a fixed 5 µs conversion time. Its ±5V bipolar input mode (with the BIP/UNI pin) handles transducer signals such as strain gauges, thermocouple amplifiers, and 4-20 mA loop receivers. The 0-5V unipolar mode accepts standard sensor outputs directly. Industrial-grade (-40 °C to +85 °C) operation suits factory-floor environments, and the parallel bus interface simplifies connection to legacy 8-bit controllers used in PLC analog modules.
推薦
DSP Front End & Digital Signal Processing
DSP front ends benefit from the MAX166AEPP+'s 200 ksps throughput and zero-latency SAR conversion, providing deterministic timing for sample-by-sample DSP pipelines. The 50 kHz analog input bandwidth comfortably covers audio-bandwidth signals, and the latched three-state outputs enable direct bus-sharing with a DSP's external memory interface. Its single +5V supply matches typical DSP analog rails, simplifying power architecture. The 5 µs conversion latency allows the DSP to process each sample before the next conversion completes without buffer overhead.
推薦
Telecomm & Audio Digitizing
Telecomm digitizing subsystems use the MAX166AEPP+ to convert analog voice or baseband signals to 8-bit digital streams at up to 200 ksps. Its ±5V bipolar input mode handles telecom line-interface signals centered at 0V, while the on-chip reference simplifies BOM. The BUSY output provides a hardware-conversion-complete flag for interrupt-driven service routines. For audio applications, the 50 kHz input bandwidth comfortably covers the 20 Hz to 20 kHz audio band with Nyquist oversampling, suitable for low-cost audio-digitizer peripherals.
推薦
Portable Instrumentation & Battery-Powered Measurement
The MAX166AEPP+ serves portable instrumentation designs that need 8-bit conversion at low power on a single +5V rail. The SAR architecture's power consumption scales with conversion rate, allowing the part to idle when not sampling. The internal reference removes external component cost and board area, which is critical for handheld form factors. Designers can power the part from a regulated +5V LDO fed by a 4xAA battery stack or a USB-derived 5V rail. Through-hole PDIP-20 packaging also aids prototyping and rework on bench instrumentation.
推薦
Legacy Microprocessor Data Bus Interface
The MAX166AEPP+'s standard CS and RD control signals make it an ideal ADC companion to legacy 8-bit microprocessors such as the 8051, 68HC11, and Z80 families. The latched three-state data outputs connect directly to the microprocessor's data bus without external latch logic. A single BUSY line provides conversion-complete status for polling or interrupt service. This simplifies firmware, removes interface glue, and preserves the legacy µP bus architecture for retrofit designs or new industrial-control designs where 32-bit MCUs are not required.
推薦
Automotive & Avionics Sensor Digitizing
The MAX166AEPP+ can digitize automotive and avionics sensor signals such as temperature, pressure, and position transducers where 8-bit resolution is sufficient. Its industrial temperature grade (-40 °C to +85 °C) handles most cabin and engine-bay environments, and its robust SAR design tolerates noisy vehicle power rails with proper decoupling. Designers should note that AEC-Q100 qualification is not specified for this part; for safety-critical systems, qualified parts from Maxim's automotive portfolio are required. For non-critical auxiliary sensors, the MAX166AEPP+ remains a cost-effective solution.
推薦
推薦產品摘要
工程參考資料，適用於 MAX166AEPP+ — 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 | MAX166BEPP+ | MAX166CCPP+ | MAX166ACPP+ |
|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | PDIP-20 | PDIP-20 (same) | PDIP-20 (same) | PDIP-20 (same) |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit |
| Sample Rate | 200 ksps | 200 ksps | 200 ksps | 200 ksps |
| Conversion Time | 5 µs | 5 µs | 5 µs | 5 µs |
| Internal Reference | +2.46V (yes) | +2.46V (yes) | +2.46V (yes) | +2.46V (yes) |
| Linearity Grade | A-grade | B-grade (tighter) | C-grade (tightest) | A-grade |
| Supply Voltage | +5V | +5V | +5V | +5V |
| Operating Temperature | -40 °C to +85 °C (E grade) | -40 °C to +85 °C (E grade) | -40 °C to +85 °C (E grade) | -40 °C to +85 °C (E grade) |
| Approx Unit Price (qty 1) | $8.20 | $9.50 | $11.00 | $8.50 |
主要差異化特點
- Faster conversion time than ADC0804/ADC0808 family (對比ADC0808)
- Integrated +2.46V reference vs external reference required (對比MAX165AEPP+)
- Direct µP bus interface vs glue logic required (對比ADC0804)
- Industrial temperature range built into the E grade (對比MAX166ACPP+ (commercial))
設計說明
The MAX166AEPP+ requires a clean +5V supply with low-noise decoupling to achieve the datasheet's 200 ksps performance and ±1 LSB linearity. Place a 10 µF tantalum (or low-ESR ceramic) bulk capacitor and a 0.1 µF ceramic bypass capacitor directly at the VDD pin (pin 15), keeping trace lengths under 5 mm. Tie AGND (pin 4) and DGND (pin 13) to a single ground plane via separate vias to avoid digital-current return paths coupling into the analog input. According to Maxim's MAX165/MAX166 datasheet, supply rejection degrades above ~100 kHz noise, so additional LC filtering on VDD may be required in noisy environments.
Route the analog input (AIN, pin 1) on a separate analog layer or guarded analog island, away from the parallel digital data bus (D0-D7). Use a guard trace or ground-fill around the AIN trace to reduce digital-to-analog crosstalk. Place REF bypass capacitor (typically 0.1 µF) directly at the REF pin (pin 2) to filter internal-reference noise. Keep digital lines (CS, RD, BUSY) short and routed together to maintain matched propagation delays. The PDIP-20 footprint allows straightforward through-hole prototyping, but for production consider migrating to a surface-mount SO-20 variant if available in the MAX166 family.
Common pitfalls include: (1) forgetting to bypass VLOGIC (pin 14) — this pin powers the digital output stages and must be tied to the system logic supply (+5V for TTL compatibility); (2) leaving the BIP/UNI pin floating — it must be tied high or low per the desired mode; (3) over-driving the analog input beyond the supply rails, which can latch up the input ESD structure; (4) sampling rates above 200 ksps, which violates the 5 µs conversion-time budget; (5) ignoring the BUSY signal during read cycles — the datasheet requires RD to remain high while BUSY is asserted to avoid reading incomplete conversion results. According to Maxim's datasheet, the part also requires the MODE pin to be properly sequenced for conversion start.
The MAX166AEPP+'s track-and-hold supports a maximum full-scale input slew rate of 386 mV/µs, which corresponds to a full-scale sine-wave bandwidth of 50 kHz. For input signals above 50 kHz, the T/H acquisition error exceeds 1 LSB. Place an anti-aliasing low-pass filter (e.g., a 2nd-order Sallen-Key with fc ≈ 100 kHz) immediately ahead of AIN to attenuate out-of-band content. The MAX262 switched-cap filter or a simple RC network are both viable choices. Maintain 50 Ω source impedance at AIN to minimize settling-time contributions to the T/H aperture error.
合規資訊
Lead-free per the '+' suffix in the MPN. RoHS/REACH compliance status was not present in the provided web data — set to unknown. AEC-Q100 not specified; consult Maxim's automotive-grade portfolio for safety-critical automotive designs.
