MAX1204ACPP - 10-Bit 8-CH 133kSPS 5V SAR ADC | Maxim Integrated
料号： MAX1204ACPP ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.18 | $11.18 |
| 10 | $10.05 | $100.50 |
| 100 | $8.92 | $892.00 |
| 500 | $7.95 | $3,975.00 |
| 1,000 | $6.98 | $6,980.00 |
MAX1204ACPP 概述
A SAR ADC is a type of data converter that uses a binary-search algorithm against an internal precision DAC to digitize an analog input one bit at a time per clock cycle. The SAR architecture sits within the broader hierarchy of analog-to-digital converters -> data converters -> signal-chain ICs -> mixed-signal semiconductors, offering an excellent trade-off between sampling speed (here up to 133 kSPS), resolution (10 bits), deterministic latency, and low power consumption. Mixed +5V/+3V supply compatibility makes the MAX1204ACPP particularly useful as a bridge between legacy analog front ends and modern low-voltage microcontrollers or ASICs.
Key features include 8 analog input channels (single-ended or differential), an SPI/QSPI/MICROWIRE-compatible serial interface, an integrated track-and-hold with 1:1 MUX:S/H ratio, and a +5V analog supply with a separate +3V digital for the digital interface (allowing direct connection to 3V logic without level shifters). The sampling rate of 133 kSPS supports general-purpose data acquisition and process control loops, while the SAR architecture guarantees no pipeline delay so the device can settle and convert within a single acquisition window.
Typical applications include portable and battery-powered data loggers, process-control analog front ends, multichannel sensor reading modules (thermocouples, RTDs, strain gauges via signal conditioning), and industrial instrumentation where 10-bit resolution is sufficient. The mixed-suprail capability eliminates external level-shifters when interfacing to 3.3V MCUs.
When designing with this part, place 0.1 µF ceramic bypass capacitors close to both the +5V (VDD) and +3V (VL) supply pins and reference pin, and keep the analog inputs away from fast digital traces to preserve the 10-bit noise floor. Because the SAR architecture draws current in bursts, ensure the reference source has low output impedance at the conversion clock frequency to avoid gain error.
This page synthesizes distributor pricing, drop-in alternatives (including -A/-B grade and -I temperature variants), and practical layout notes not collected in the manufacturer datasheet PDF alone.
直接替换替代料： MAX1204ACPP ——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： MAX1204ACPP （相同外形与封装尺寸） ——差异在于 Mounting Type, Package, Resolution.
快速对比工具——选择替代料号进行并排对比：
MAX1204BCPP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1204BEPP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1204BCPP
✅ 直接替换📋 参考替代料（不在目录中）
MAX1202ACAP
✅ 直接替换✓ 有现货
$7.17 / 个
查看数据手册 →MAX1204AEPP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX1204ACPP 最大额定值与电气特性
| 分辨率 | 10 bit |
| Number of Channels | 8 |
| 采样率 | 133 kSPS |
| Architecture | SAR (Successive Approximation) |
| Input Type | Single-Ended, Differential |
| Analog Supply Voltage (VDD) | +5 V |
| Digital Interface Supply (VL) | +3 V |
| Data Interface | SPI / QSPI / MICROWIRE-compatible serial |
| MUX:S/H:ADC Ratio | 1:1 |
| Number of ADC Converters | 1 |
| Input Configuration | MUX-S/H-ADC |
| 工作温度范围 | 0 °C to +70 °C (commercial, A grade) |
| 封装 | 20-pin PDIP (through-hole) |
| Package Code | DIP-20 |
| 安装类型 | Through-Hole |
MAX1204ACPP 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 | AIN4 — Analog Input Channel 4 |
| 引脚 6 | AIN5 — Analog Input Channel 5 |
| 引脚 7 | AIN6 — Analog Input Channel 6 |
| 引脚 8 | AIN7 — Analog Input Channel 7 |
| 引脚 9 | AGND — Analog Ground |
| 引脚 10 | REF — Reference Voltage Input |
| 引脚 11 | VDD — +5 V Analog Supply |
| 引脚 12 | SHDN — Shutdown (active low) |
| 引脚 13 | VL — +3 V Digital Interface Supply |
| 引脚 14 | DGND — Digital Ground |
| 引脚 15 | DOUT — Serial Data Output |
| 引脚 16 | SCLK — Serial Clock Input |
| 引脚 17 | CS — Chip Select (active low) |
| 引脚 18 | NC — Not connected (per datasheet) |
| 引脚 19 | NC — Not connected (per datasheet) |
| 引脚 20 | NC — Not connected (per datasheet) |
典型应用
MAX1204ACPP 适用于 6 应用s: Portable Data Acquisition Systems, Industrial Process Control Analog Front Ends, Multichannel Sensor Reading Modules, Battery-Powered Instrumentation, Legacy 5V Analog to 3V Digital Bridge, Test & Measurement Front Panels.
Portable Data Acquisition Systems
The MAX1204ACPP's 133 kSPS throughput and 8 single-ended/differential input channels make it well-suited for portable multi-channel data loggers where the +5 V analog / +3 V digital split rail lets the analog signal chain run at full ±5 V swing while the host MCU runs at 3.3 V. Place 0.1 µF ceramic bypass capacitors on both VDD and VL, route analog inputs away from the SPI clock trace, and buffer the reference pin with a low-impedance op-amp to preserve 10-bit noise floor. Unlike higher-resolution 12-/14-bit SARs, the 10-bit core delivers adequate dynamic range for general sensor scanning at lower BOM cost.
推荐
Industrial Process Control Analog Front Ends
In a 4-20 mA loop-powered process-control analog front end, the MAX1204ACPP digitizes up to 8 sensor channels (thermocouples, RTDs, pressure transducers) through external signal conditioning. The SAR architecture offers zero pipeline delay, which simplifies deterministic scanning loops in PLC modules. According to the Maxim datasheet, the integrated analog multiplexer reduces external component count versus discrete solutions. The +3 V VL rail lets a 3.3 V ARM Cortex-M host read conversions directly via SPI, eliminating level-shifters in compact DIN-rail modules.
推荐
Multichannel Sensor Reading Modules
The MAX1204ACPP supports up to 8 sensor inputs in a single 20-pin PDIP, making it ideal for compact sensor-hub modules reading strain gauges, thermistors, or photodiodes with external transimpedance amplifiers. The single-ended or differential input configuration allows 4 true-differential channels for bridge-type sensors, doubling the effective measurement density versus single-ended-only parts. The 133 kSPS sampling rate is sufficient for vibration or temperature scanning at sub-kHz rates. According to Maxim datasheet figures, the 10-bit resolution maps to ~5 mV LSB on a 5 V full-scale input.
推荐
Battery-Powered Instrumentation
The MAX1204ACPP fits low-power battery-powered instrumentation where 10-bit resolution is acceptable and the dual +5 V analog / +3 V digital supply topology is required for sensor excitation rails. The SAR core only draws current during active conversion, leaving quiescent consumption low between scans. The +3 V VL pin can be tied to the host MCU's 3.3 V rail, simplifying power-tree design. According to Maxim datasheet characteristics, the shutdown pin (SHDN) further reduces current draw to microampere levels between conversion bursts, extending battery life in duty-cycled designs.
推荐
Legacy 5V Analog to 3V Digital Bridge
The MAX1204ACPP's headline role is bridging +5 V analog signals to +3 V digital logic without external level shifters. This dual-supply SAR is designed into mixed-voltage systems where analog signal chains (op-amps, sensors) still operate on ±5 V or 0-5 V rails while the host microcontroller has migrated to 3.3 V. The VL pin accepts +2.7 V to +3.6 V, supporting a wide range of 3 V logic families. According to Maxim datasheet, this eliminates BOM cost and PCB area compared to discrete resistor-divider level-shifters.
推荐
Test & Measurement Front Panels
Benchtop test equipment and lab instrumentation benefit from the MAX1204ACPP's 8-channel input multiplexer and SAR deterministic latency. Scanned digitizers, oscilloscope front-end digitizers for slow channels, and programmable voltage reference modules all leverage the +5 V analog tolerance and direct 3 V host interface. The PDIP-20 through-hole package is also useful for prototype and breadboard designs where socketed parts speed up bench iteration. According to Maxim datasheet, the SPI interface allows daisy-chaining multiple MAX1204 parts for >8-channel systems.
推荐
推荐产品汇总
工程参考数据： MAX1204ACPP ——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 | MAX1204BCPP+ | MAX1204BEPP+ | MAX1204BCPP | MAX1202ACAP | MAX1204AEPP |
|---|---|---|---|---|---|---|
| Package | PDIP-20 | PDIP-20 - same | PDIP-20 - same | PDIP-20 - same | SSOP-20 - different package | PDIP-20 - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Analog Supply (VDD) | +5 V | +5 V | +5 V | +5 V | +5 V | +5 V |
| Digital Interface Supply (VL) | +3 V | +3 V | +3 V | +3 V | +3 V | +3 V |
关键差异点
- Mixed +5 V analog / +3 V digital dual supply on a single die （对比 MAX1204BEPP+ (B grade))
- 8-channel integrated analog multiplexer with single-ended or differential mode （对比 Discrete 8-channel MUX + standalone ADC)
- SAR architecture with deterministic zero pipeline delay （对比 Pipelined 10-bit ADCs)
设计说明
The MAX1204ACPP has two supply rails: VDD (+5 V analog) and VL (+3 V digital). Place a 0.1 µF ceramic bypass capacitor as close as possible to each supply pin, with a 10 µF tantalum or aluminum bulk capacitor on VDD. The VL pin can be sourced directly from the host MCU's 3.3 V regulator rail, eliminating a separate LDO. According to the Maxim datasheet, the VL range is +2.7 V to +3.6 V, supporting most 3.3 V microcontrollers without level-shifters.
Route analog input traces (AIN0–AIN7) and the REF pin trace away from the SPI digital lines (SCLK, DOUT, CS) on the PCB to prevent digital coupling into the analog frontend. Use a ground plane under the analog section and stitch the analog ground (AGND) to digital ground (DGND) at a single point near the ADC. This star-ground technique preserves the 10-bit noise floor by preventing return-current noise from digital switching on the SPI bus.
Do not leave the REF pin floating — it requires a stable low-impedance reference voltage (typically +5 V from VDD through a buffer or external reference IC). A high-impedance reference source will cause gain error and degraded linearity as the SAR DAC draws burst current during conversion. Also, the SHDN pin is active-low; tie it to VL through a 100 kΩ pull-up if shutdown control is not used, otherwise the device may power up in shutdown state.
合规信息
RoHS and lead-free status not confirmed in verified web data. Part is no longer in active production per Maxim Integrated product lifecycle. AEC-Q100 not applicable — this is a commercial/industrial grade ADC, not an automotive qualified part.
