MAX1069AEUD+ - 14-Bit 58.6ksps 2-Wire Serial ADC | Maxim
MPN: MAX1069AEUD+ ✓ Hoạt độngMAX1069AEUD+ Tóm tắt
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+.
Bộ thay thế dễ dàng lắp đặt cho MAX1069AEUD+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX1069AEUD+ (cùng hình factor và footprint) — khác nhau ở Resolution, Architecture, Number of Channels, Mounting Type, Package.
MAX1069BEUD+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1069ACUD+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1169BEUD+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1169CCUD+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1069AEUD+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1069AEUD+ Tỷ lệ tối đa & tính chất điện
| Manufacturer | Analog Devices / Maxim Integrated |
| Part Number | MAX1069AEUD+ |
| Độ phân giải | 14 bits |
| Number of Channels | 1 |
| Sample Rate | 58.6 ksps |
| Converter Type | SAR (Successive Approximation Register) |
| Giao diện | 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) |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (extended) |
| Hộp | 14-pin TSSOP |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 1 |
Cấu hình chân MAX1069AEUD+
| Chân 1 | AVDD — Analog supply voltage input (4.75 V to 5.25 V); bypass with 0.1 uF + 10 uF to AGND |
| Chân 2 | AIN — Analog input channel; software-configurable unipolar 0 to VREF or bipolar +/-VREF/2 |
| Chân 3 | REF — Reference voltage input/output; internal 4.096 V or external reference drive |
| Chân 4 | AGND — Analog ground; connect to ground plane |
| Chân 5 | DGND — Digital ground; tie to AGND at a single point |
| Chân 6 | SDA — 2-wire serial data; I2C-compatible, open-drain, requires pull-up resistor |
| Chân 7 | SCL — 2-wire serial clock; I2C-compatible, slave input |
| Chân 8 | ADD0 — Address select bit 0; strap to GND or VDD at power-up |
| Chân 9 | ADD1 — Address select bit 1; strap to GND or VDD at power-up |
| Chân 10 | ADD2 — Address select bit 2; strap to GND or VDD at power-up |
| Chân 11 | ADD3 — Address select bit 3; strap to GND or VDD at power-up |
| Chân 12 | INT/EXT — Reference select; INT = internal 4.096 V, EXT = external reference on REF pin |
| Chân 13 | DVDD — Digital supply voltage input (2.7 V to 5.25 V); bypass with 0.1 uF to DGND |
| Chân 14 | AGND — Analog ground (secondary pin); connect to ground plane |
Ứng dụng tiêu biểu
MAX1069AEUD+ phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX1069AEUD+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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) |
Bảo phân biệt quan trọng
- Drop-in 16-bit upgrade path on the same footprint (vsMAX1169BEUD+)
- A-grade internal reference tolerance (vsMAX1069BEUD+)
- Extended -40 C to +85 C operating range (vsMAX1069ACUD+)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.