MAX1111EEE+TG068 - 4-Ch 8-Bit SAR ADC, QSOP-16 | Analog Devices
MPN: MAX1111EEE+TG068 ✓ نشطMAX1111EEE+TG068 نظرة عامة
A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm against an internal or external reference to digitize an analog input. Within the broader component taxonomy, SAR ADCs sit under ADC -> data converter -> mixed-signal IC -> semiconductor. Low-power 8-bit SAR ADCs such as the MAX1111 occupy the entry-level precision tier of the data-converter market, typically used for sensor readout, panel controls, and portable instrumentation where 10-/12-bit precision is unnecessary.
Key specifications of the MAX1111EEE+TG068 include 4 software-configurable analog inputs (unipolar or bipolar, single-ended or pseudo-differential pairs), an internal 2.048 V reference, software-programmable sample rate, and SPI/QSPI/MICROWIRE-compatible serial interface with SCHMITT-trigger SCLK input for noise-tolerant operation. The integrated reference and clock eliminate external components, reducing BOM count for compact designs.
The MAX1111 employs a charge-redistribution SAR architecture with an input track/hold that supports input bandwidth greater than the Nyquist limit, allowing accurate digitization of higher-frequency signals without a separate front-end buffer. The internal reference is laser-trimmed for low initial error and low drift across the operating temperature range.
Typical applications include portable and battery-powered data loggers, panel-meter signal conditioning, handheld instrumentation, and 4-channel sensor monitoring in industrial and IoT nodes. The wide 2.7V-5.5V supply range allows direct connection to single-cell Li-ion, 3.3V, or 5V rails without a level shifter.
When designing with this device, place the 0.1 µF supply bypass capacitor within 5 mm of the AVDD pin to maintain converter accuracy. The serial interface shares ground reference with the controller, and a Schottky clamp on analog inputs is recommended if transients beyond VDD may occur.
This page synthesizes distributor pricing, drop-in alternatives, internal companion MPN cross-references, and practical layout notes for the MAX1111EEE+TG068 not found in the manufacturer datasheet alone.
بدائل مباشرة لـ MAX1111EEE+TG068 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MAX1111EEE+TG068 (نفس عامل الشكل والبصمة) — يختلف في Internal Reference Voltage, Number of Analog Input Channels, Operating Temperature Range, Package, Resolution.
MAX1111EEE+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1111EEE/V+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1110EEE+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1062BCUE+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1082ACUE+T
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MAX1111EEE+TG068 الحدود القصوى والخصائص الكهربائية
| الوظيفة | 8-bit, 4-channel SAR ADC with internal reference and serial interface |
| الدقة | 8 bits |
| Number of Analog Input Channels | 4 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Sampling Rate (max) | 50 ksps |
| Supply Current (operating) | 85 µA (typ at 50 ksps) |
| Internal Reference Voltage | 2.048 V |
| Input Configuration | Software-configurable unipolar/bipolar, single-ended/pseudo-differential |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible |
| Input Bandwidth | > Nyquist (per datasheet) |
| العلبة | 16-pin QSOP |
| نطاق درجة حرارة التشغيل | -40 C to +85 C |
| Package Type (Tape Variant) | +TG068 tape-and-reel |
| Architecture | Charge-redistribution SAR with input track/hold |
| RoHS Compliance | RoHS compliant (per manufacturer product page) |
تكوين أطراف MAX1111EEE+TG068
| دبوس 1 | CS — Chip Select (active-low, serial interface) |
| دبوس 2 | DOUT — Serial Data Output (SPI MISO) |
| دبوس 3 | SSTRB — Serial Strobe Output (conversion-complete flag) |
| دبوس 4 | AGND — Analog Ground |
| دبوس 5 | AIN0 — Analog Input 0 |
| دبوس 6 | AIN1 — Analog Input 1 |
| دبوس 7 | AIN2 — Analog Input 2 |
| دبوس 8 | AIN3 — Analog Input 3 |
| دبوس 9 | DGND — Digital Ground |
| دبوس 10 | DVDD — Digital Supply Voltage |
| دبوس 11 | AVDD — Analog Supply Voltage |
| دبوس 12 | REF — Reference Voltage (internal 2.048V, bypass with capacitor) |
| دبوس 13 | SCLK — Serial Clock Input (Schmitt-trigger) |
| دبوس 14 | DIN — Serial Data Input (SPI MOSI) |
| دبوس 15 | NC — Not connected (per datasheet) |
| دبوس 16 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
MAX1111EEE+TG068 مناسب لـ 6 التطبيقs: Battery-Powered Multi-Sensor Data Logger, Handheld Digital Panel Meter, Industrial Sensor Conditioning Front-End, Portable Medical Monitoring Accessory, IoT Edge Node Sensor Hub, Automotive Cabin Climate Monitoring (non-safety).
Battery-Powered Multi-Sensor Data Logger
The MAX1111EEE+TG068 fits battery-powered 4-channel sensor loggers because it operates from a single 2.7V-5.5V rail (compatible with single-cell Li-ion) and draws only 85 µA at 50 ksps while digitizing four unipolar/bipolar inputs. Its internal 2.048V reference eliminates an external reference IC, shrinking BOM count and quiescent draw. Estimated: at 1 ksps duty-cycled sampling, average supply current drops to under 10 µA, supporting months of life on a single 2000 mAh Li-ion cell. Place a 0.1 µF bypass within 5 mm of AVDD to maintain accuracy across temperature.
موصى به
Handheld Digital Panel Meter
For handheld panel meters and multimeter-style displays, the MAX1111EEE+TG068 delivers 8-bit resolution across four software-configurable ranges (unipolar or bipolar) at up to 50 ksps, sufficient for sub-1% display update rates on voltage, current, temperature, and frequency channels. The SPI interface attaches directly to a low-cost microcontroller LCD driver, while the internal reference removes the need for a precision external reference. The 16-pin QSOP keeps the meter compact, and the -40C to +85C rating covers consumer environments.
موصى به
Industrial Sensor Conditioning Front-End
The MAX1111EEE+TG068 supports industrial 4-channel sensor conditioning for thermocouple, RTD, strain-gauge, or 4-20 mA loop inputs through its bipolar pseudo-differential mode. With 50 ksps and 8-bit resolution it digitizes transducer signals directly into the host PLC, while the 2.7V-5.5V supply draws power from the same 24V loop-derived rail used elsewhere on the board. The QSOP-16 footprint simplifies PCB layout compared to larger SO-16 options, and the device's 85 µA operating current keeps heat dissipation negligible in sealed enclosures.
موصى به
Portable Medical Monitoring Accessory
In portable medical or wellness accessories (pulse-oximeter spoilage sensors, body-temperature patches, single-lead ECG front ends), the MAX1111EEE+TG068 offers 4 input channels and low 85 µA operation from a 3.3V coin-cell source. Its internal 2.048V reference drives unipolar analog inputs at biomedical signal levels (typically amplified to mid-rail). Compared to external-reference SAR ADCs, integrating the reference saves board area for wearable form factors. Pseudo-differential inputs reject common-mode noise from cable harnesses, an essential feature for bedside monitoring.
موصى به
IoT Edge Node Sensor Hub
IoT edge nodes and wireless sensor hubs benefit from the MAX1111EEE+TG068's combination of 4 analog channels, 2.7V-5.5V supply (compatible with 3.3V MCUs), SPI/QSPI/MICROWIRE serial interface, and 85 µA operating current. It can read temperature, light, soil moisture, and battery voltage through four single-ended channels at duty-cycled intervals, transmitting digitized readings over BLE or LoRa while drawing negligible current from the host battery. The internal reference removes an external precision component, simplifying the BOM and shrinking PCB area for coin-cell-powered nodes.
موصى به
Automotive Cabin Climate Monitoring (non-safety)
For non-safety automotive applications such as cabin climate-zone temperature sampling, seat-occupancy detection, or rear-seat reminder sensor aggregation, the MAX1111EEE+TG068 (or its /V automotive-grade sibling MAX1111EEE/V+) digitizes four analog signals at 50 ksps from the vehicle's 5V rail. The automotive /V variant offers -40C to +125C operation, suitable for under-dash mounting with extended thermal margins. Pseudo-differential inputs reject ground-bounce noise from shared automotive power buses, and the QSOP-16 footprint eases integration into body-control modules.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MAX1111EEE+TG068 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX1111EEE+ | MAX1111EEE/V+ | MAX1110EEE+ | MAX1062BCUE+ | MAX1082ACUE+ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | QSOP-16 | QSOP-16 - same | QSOP-16 - same | QSOP-16 - same | QSOP-16 - same | QSOP-16 - same |
| Automotive Grade (AEC-Q100) | Not Qualified | Not Qualified | AEC-Q100 (/V suffix, automotive grade) | Not Qualified | Not Qualified | Not Qualified |
أبرز الفروقات
- Internal 2.048V reference eliminates external precision reference (مقابلMAX1082ACUE+)
- Automotive-grade /V variant available on identical QSOP-16 footprint (مقابلMAX1111EEE+)
- Software-configurable channel modes (unipolar/bipolar/differential) (مقابلMAX1110EEE+)
ملاحظات التصميم
Place the 0.1 µF supply-bypass ceramic capacitor within 5 mm of the AVDD pin (pin 11) and a 10 µF bulk capacitor within 25 mm. Keep analog and digital grounds separated and join them at a single point near the AGND/DGND pin pair. Long digital traces crossing under the analog input traces will couple noise into the sample-and-hold window, so route analog inputs over a solid analog ground plane.
Although the MAX1111EEE+TG068 has a Schmitt-trigger SCLK input, route SCLK/DIN/DOUT together with matched trace lengths if trace length exceeds 25 mm. Add a 33 ohm series damping resistor at the SCLK driver if reflections appear on the rising edge. Place DOUT and SSTRB trace routing away from analog inputs to prevent capacitive coupling into the SAR's comparator.
Do not apply analog inputs beyond AVDD+0.3V without external Schottky clamp diodes - the MAX1111's input protection is minimal and over-voltage conditions can damage the analog switches. Always power up with AVDD before analog signals are present. The +TG068 tape-and-reel suffix indicates a specific carrier orientation - confirm the carrier orientation matches your pick-and-place machine's vision system before populating boards.
Estimated: at 2.7V supply, 50 ksps continuous conversion, the MAX1111EEE+TG068 dissipates roughly 230 µW (P = V x I = 2.7V x 85 µA). At 5.5V, dissipation rises to approximately 470 µW, still negligible but worth budgeting in thermally sealed handheld enclosures where four-channel ICs are stacked with other analog components. Power-down between conversions saves roughly 95% of supply current.
معلومات الامتثال
MAX1111EEE+TG068 is RoHS/REACH compliant and lead-free per the + suffix and Analog Devices product page; not AEC-Q100 qualified (use MAX1111EEE/V+ variant for automotive).
