MAX1069AEUD+ - 14-Bit 58.6ksps 2-Wire Serial ADC | Maxim
料号： MAX1069AEUD+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.25 | $7.25 |
| 10 | $6.42 | $64.20 |
| 100 | $5.58 | $558.00 |
| 500 | $4.81 | $2,405.00 |
| 1,000 | $4.2 | $4,200.00 |
MAX1069AEUD+ 概述
What is a SAR ADC? A successive-approximation register analog-to-digital converter is a type of data converter that uses a binary-search algorithm against an internal DAC to resolve an analog input to N bits in N clock cycles. SAR ADCs offer an attractive trade-off between sample rate (typically 1 ksps to 1 Msps), resolution (8 to 20 bits), power consumption, and latency, making them the workhorse of mid-speed precision measurement applications where single-shot or burst conversions are needed. They sit in the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features of the MAX1069AEUD+ include automatic power-down between conversions (reducing supply current to microampere levels), an on-chip 4 MHz oscillator, software-configurable unipolar/bipolar input ranges, and an internal or external reference option. The 14-pin TSSOP footprint is pin-compatible with the higher-resolution 16-bit MAX1169 family, allowing easy migration when system SNR requirements grow.
The MAX1069 architecture combines a capacitive-DAC SAR core with an input track-and-hold, a comparator, and a sequencer. The internal 4.096 V reference provides approximately 1 LSB = 250 uV at full-scale, while the wide digital supply range permits direct connection to 3 V or 5 V microcontrollers without level shifters. This combination is well suited to portable instrumentation, medical monitors, and solar-powered remote sensor nodes where both precision and low quiescent current are required.
Typical applications include handheld portable instruments, medical instrumentation, battery-powered test equipment, solar-powered remote systems, received-signal-strength indicators (RSSI) for RF links, and system supervision in industrial control. Designers should note that decoupling the analog and digital supplies with separate 0.1 uF + 10 uF capacitors is essential, and the I2C address is set by hard-wiring ADD0-ADD3 to GND or VDD before power-up. This page synthesizes distributor stock, drop-in pin-compatible alternatives, and practical layout notes that are not present in the bare datasheet, giving engineers a single decision-ready reference for the MAX1069AEUD+.
直接替换替代料： MAX1069AEUD+ ——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： MAX1069AEUD+ （相同外形与封装尺寸） ——差异在于 Resolution, Architecture, Number of Channels, Mounting Type, Package.
快速对比工具——选择替代料号进行并排对比：
MAX1069BEUD+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1069ACUD+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1169BEUD+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1169CCUD+
✅ 直接替换✓ 有现货
$5.55 / 个
查看数据手册 →MAX1069AEUD+T
✅ 直接替换✓ 有现货
$3.78 / 个
查看数据手册 →MAX1069AEUD+ 最大额定值与电气特性
| Manufacturer | Analog Devices / Maxim Integrated |
| Part Number | MAX1069AEUD+ |
| 分辨率 | 14 bits |
| Number of Channels | 1 |
| Sample Rate | 58.6 ksps |
| Converter Type | SAR (Successive Approximation Register) |
| 接口 | 2-Wire Serial, I2C-compatible |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| Input Voltage Range (Unipolar) | 0 to VREF |
| Input Voltage Range (Bipolar) | +/-VREF/2 (software-configurable) |
| Internal Reference | 4.096 V |
| Number of I2C Addresses | 16 (selectable via ADD0-ADD3) |
| 工作温度范围 | -40 C to +85 C (extended) |
| 封装 | 14-pin TSSOP |
| RoHS 状态 | Compliant |
| MSL 等级 | 1 |
MAX1069AEUD+ 引脚配置
| 引脚 1 | AVDD — Analog supply voltage input (4.75 V to 5.25 V); bypass with 0.1 uF + 10 uF to AGND |
| 引脚 2 | AIN — Analog input channel; software-configurable unipolar 0 to VREF or bipolar +/-VREF/2 |
| 引脚 3 | REF — Reference voltage input/output; internal 4.096 V or external reference drive |
| 引脚 4 | AGND — Analog ground; connect to ground plane |
| 引脚 5 | DGND — Digital ground; tie to AGND at a single point |
| 引脚 6 | SDA — 2-wire serial data; I2C-compatible, open-drain, requires pull-up resistor |
| 引脚 7 | SCL — 2-wire serial clock; I2C-compatible, slave input |
| 引脚 8 | ADD0 — Address select bit 0; strap to GND or VDD at power-up |
| 引脚 9 | ADD1 — Address select bit 1; strap to GND or VDD at power-up |
| 引脚 10 | ADD2 — Address select bit 2; strap to GND or VDD at power-up |
| 引脚 11 | ADD3 — Address select bit 3; strap to GND or VDD at power-up |
| 引脚 12 | INT/EXT — Reference select; INT = internal 4.096 V, EXT = external reference on REF pin |
| 引脚 13 | DVDD — Digital supply voltage input (2.7 V to 5.25 V); bypass with 0.1 uF to DGND |
| 引脚 14 | AGND — Analog ground (secondary pin); connect to ground plane |
典型应用
MAX1069AEUD+ 适用于 6 应用s: Handheld Portable Instruments, Medical Instrumentation, Battery-Powered Test Equipment, Solar-Powered Remote Sensor Systems, Received-Signal-Strength Indicators (RSSI), System Supervision and Industrial Control.
Handheld Portable Instruments
The MAX1069AEUD+ is a strong fit for handheld portable instruments such as digital multimeters and portable data loggers. Its 14-bit resolution and 58.6 ksps sample rate digitize bridge, thermocouple, and thermistor signals directly, while the automatic power-down between conversions reduces average supply current to the microampere range - critical for AA-battery runtime. The internal 4.096 V reference gives 250 uV per LSB, which matches the noise floor of typical sensor front-ends without needing an external reference. The 14-pin TSSOP package is small enough for handheld form factors and shares a pinout with the higher-resolution MAX1169 family, so designers can scale SNR upward without re-laying out the PCB.
推荐
Medical Instrumentation
The MAX1069AEUD+ is well matched to medical instrumentation such as blood-pressure monitors, pulse oximeters, and glucose meters. Its 14-bit resolution is sufficient to digitize the low-frequency analog outputs of bio-sensor front-ends (typically 0-4 V full-scale at 1 kHz bandwidth), and the I2C interface allows direct connection to a host microcontroller without external logic. The 2.7 V to 5.25 V digital supply range permits direct connection to 3.3 V Cortex-M class MCUs. According to the datasheet, the extended -40 C to +85 C operating range covers the temperature envelope of portable medical devices shipped globally.
推荐
Battery-Powered Test Equipment
The MAX1069AEUD+ is designed into battery-powered test equipment where energy efficiency and parts count matter. Its automatic power-down between conversions drops supply current to a few microamperes, while the internal 4.096 V reference eliminates an external reference IC and its quiescent current. The 2-wire I2C interface needs only two microcontroller pins, freeing GPIO for relays and displays. The 58.6 ksps throughput is fast enough to digitize audio-bandwidth signals or transient events on a bench instrument, while 14-bit resolution gives 84 dB dynamic range - adequate for most field-service troubleshooting tools.
推荐
Solar-Powered Remote Sensor Systems
The MAX1069AEUD+ is ideal for solar-powered remote sensor systems where standby current dominates battery life. The device's automatic power-down mode means the ADC draws only microamperes between infrequent sensor readings - critical for installations that must run for years on a small solar cell. The 4.75 V to 5.25 V analog supply is compatible with small 6 V lead-acid or 4-cell NiMH battery packs commonly used in remote telemetry, and the 14-pin TSSOP tolerates the wide temperature swings seen in outdoor enclosures (-40 C to +85 C). Four hardware address pins let a single I2C bus serve up to 16 different sensor channels at the remote site.
推荐
Received-Signal-Strength Indicators (RSSI)
The MAX1069AEUD+ is well suited to RSSI measurement in radio receivers and wireless base stations. Its 58.6 ksps sample rate is more than fast enough to track the AGC voltage of a slowly varying RF signal-strength detector, and 14-bit resolution resolves RSSI steps finer than 0.1 dB when the detector output is scaled to the 0-4.096 V input range. The I2C interface allows the ADC to share a bus with the radio's main microcontroller, and the 16 selectable slave addresses mean a single bus can support multiple receivers in a MIMO or diversity antenna system. According to the datasheet, the device is also used in cellular handset RSSI monitoring.
推荐
System Supervision and Industrial Control
The MAX1069AEUD+ fits naturally into system supervision blocks of industrial PLCs and process controllers. It can digitize thermistor temperature, current-sense amplifier outputs, or 4-20 mA loop receivers, and the 2-wire interface allows up to 16 devices on a single management bus for multi-zone monitoring. The -40 C to +85 C operating range covers factory-floor conditions, and the TSSOP-14 footprint is small enough to fit on dense backplanes. According to the datasheet, the analog input can be software-configured for unipolar 0 to VREF or bipolar +/-VREF/2, allowing direct connection to +/-10 V signals after simple resistor scaling.
推荐
推荐产品汇总
工程参考数据： MAX1069AEUD+ ——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 | MAX1069BEUD+ | MAX1069ACUD+ | MAX1169BEUD+ | MAX1169CCUD+ | MAX1069AEUD+T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated |
| Package | TSSOP-14 | TSSOP-14 - same | TSSOP-14 - same | TSSOP-14 - same | TSSOP-14 - same | TSSOP-14 - same |
| Resolution | 14 bits | 14 bits | 14 bits | 16 bits | 16 bits | 14 bits |
| Sample Rate | 58.6 ksps | 58.6 ksps | 58.6 ksps | 58.6 ksps | 58.6 ksps | 58.6 ksps |
| Operating Temperature | -40 C to +85 C (extended) | -40 C to +85 C (extended) | 0 C to +70 C (commercial) | -40 C to +85 C (extended) | 0 C to +70 C (commercial) | -40 C to +85 C (extended) |
| Internal Reference | 4.096 V (A-grade tolerance) | 4.096 V (B-grade tolerance) | 4.096 V | 4.096 V | 4.096 V | 4.096 V (A-grade tolerance) |
| I2C Addresses | 16 (ADD0-ADD3) | 16 (ADD0-ADD3) | 16 (ADD0-ADD3) | 16 (ADD0-ADD3) | 16 (ADD0-ADD3) | 16 (ADD0-ADD3) |
| Interface | 2-Wire I2C | 2-Wire I2C | 2-Wire I2C | 2-Wire I2C | 2-Wire I2C | 2-Wire I2C |
| Pin-to-Pin Compatible | Yes (this is the baseline) | Yes | Yes | Yes (16-bit upgrade) | Yes (16-bit upgrade) | Yes (same die, reel packaging) |
关键差异点
- Drop-in 16-bit upgrade path on the same footprint （对比 MAX1169BEUD+)
- A-grade internal reference tolerance （对比 MAX1069BEUD+)
- Extended -40 C to +85 C operating range （对比 MAX1069ACUD+)
设计说明
Estimated: Place a 0.1 uF X7R ceramic bypass capacitor within 2 mm of the AVDD pin (pin 1) and another within 2 mm of the DVDD pin (pin 13). Add a shared 10 uF tantalum or ceramic bulk capacitor at the supply entry point. Separate analog and digital ground planes with a single-point tie under the AGND pin (pin 4 or 14) to avoid digital return currents contaminating the analog ground. Keep digital traces (SDA, SCL, ADD0-ADD3) routed away from the AIN input trace to minimize digital-to-analog crosstalk.
Route the SDA and SCL lines as a 2-wire bus with 4.7 kohm pull-up resistors to DVDD. Place the pull-ups near the bus master, not near each slave, so the bus can be released cleanly during arbitration. Keep SDA and SCL traces short and matched in length to within a few millimeters to avoid timing skew. If the bus runs longer than 50 mm, add a small series resistor (22-33 ohm) near each slave to damp ringing on the rising edge.
Do not leave the ADD0-ADD3 address pins floating; strap each one to either GND or DVDD before power-up. Floating address pins can cause indeterminate I2C addressing and intermittent bus collisions. Also confirm that the INT/EXT pin (pin 12) is tied correctly: drive it high to use the internal 4.096 V reference, or drive it low and apply an external reference to the REF pin (pin 3). According to the datasheet, leaving INT/EXT floating is undefined behavior.
合规信息
RoHS compliant per Maxim Integrated product page. Lead-free (Pb-free) TSSOP-14 package. Not AEC-Q100 qualified - this is an industrial/consumer part, not an automotive-grade part. Halogen-free status not explicitly stated in the verified data.
