MAX1093BEEG - 250ksps 10-Bit 4-Ch ADC +2.5V Ref | Maxim Integrated
MPN: MAX1093BEEG ✓ نشطMAX1093BEEG نظرة عامة
An SAR ADC is a successive-approximation register type analog-to-digital converter that converts an input voltage to a digital code using a binary search algorithm against an internal DAC and comparator. SAR ADCs occupy a middle ground in the converter hierarchy between flash ADCs (fastest, lowest resolution) and sigma-delta ADCs (slowest, highest resolution). They typically offer resolutions from 8 to 18 bits with sample rates up to a few Msps, and are favored when low latency and deterministic aperture are required.
Key features of the MAX1093BEEG include 250 ksps sampling rate, ±1 LSB INL, ±1 LSB DNL, true-differential analog inputs, automatic power-down between conversions, 2 µs wake-up time, an on-chip +2.5V reference (with REFADJ for external adjustment), and an external analog input range that extends to the supply rails. Power consumption at 250 ksps is approximately 5.7 mW from a single +2.7V to +3.6V supply, dropping to microwatts during auto power-down.
The MAX1093BEEG uses a charge-redistribution DAC and an internal clock, eliminating the need for an external clock source in most applications. Parallel byte-wide output enables direct connection to microcontrollers and DSPs without glue logic. The high-speed parallel interface supports both separate-byte and word-wide read modes and includes a standard CS/RD handshake that maps naturally to a 74HC573 latch or directly to a microcontroller bus.
Typical applications include data-acquisition systems, pen digitizers and touch screens, industrial process control and instrumentation, portable battery-powered equipment, and low-cost DSP front-ends. The combination of 4-channel input multiplexing and +2.5V internal reference simplifies board layout in multi-channel embedded systems.
When designing with the MAX1093BEEG, place the 0.1 µF bypass capacitor at the supply pin and keep the analog input traces short and guarded to preserve INL. Use the automatic power-down mode aggressively between conversions to minimize average current in battery-powered systems.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design guidance not found in the manufacturer datasheet alone.
بدائل مباشرة لـ MAX1093BEEG — 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 MAX1093BEEG (نفس عامل الشكل والبصمة) — يختلف في Resolution, Interface, Number of Channels, Package, Internal Reference.
MAX1093AEEG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MAX1092BEEG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MAX1093BCEG
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1093ACEG
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1091BEEI+T
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MAX1093BEEG الحدود القصوى والخصائص الكهربائية
| الدقة | 10 bit |
| معدل أخذ العينات | 250 ksps |
| Number of Input Channels | 4 single-ended / 2 pseudo-differential |
| Architecture | SAR (Successive Approximation) |
| نطاق جهد الدخل | 0 V to VREF (single-ended); ±VREF (pseudo-differential) |
| جهد التغذية | +2.7 V to +3.6 V |
| Supply Current (250 ksps) | 1.9 mA (typ) |
| Supply Current (Auto Power-Down) | 1 µA (typ) |
| Internal Reference | +2.5 V |
| INL (max) | ±1 LSB |
| DNL (max) | ±1 LSB |
| Wake-Up Time | 2 µs |
| Digital Interface | Byte-wide parallel |
| نطاق درجة حرارة التشغيل | -40 °C to +85 °C (industrial) |
| العلبة | 24-pin QSOP |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف MAX1093BEEG
| دبوس 1 | AIN0 — Analog input channel 0 |
| دبوس 2 | AIN1 — Analog input channel 1 |
| دبوس 3 | AIN2 — Analog input channel 2 |
| دبوس 4 | AIN3 — Analog input channel 3 |
| دبوس 5 | REF — Reference voltage output / input |
| دبوس 6 | REFADJ — Reference adjust input |
| دبوس 7 | AGND — Analog ground |
| دبوس 8 | AVDD — Analog supply voltage (+3V) |
| دبوس 9 | DVDD — Digital supply voltage (+3V) |
| دبوس 10 | DGND — Digital ground |
| دبوس 11 | D0 — Data bit 0 (LSB) |
| دبوس 12 | D1 — Data bit 1 |
| دبوس 13 | D2 — Data bit 2 |
| دبوس 14 | D3 — Data bit 3 |
| دبوس 15 | D4 — Data bit 4 |
| دبوس 16 | D5 — Data bit 5 |
| دبوس 17 | D6 — Data bit 6 |
| دبوس 18 | D7 — Data bit 7 |
| دبوس 19 | D8 — Data bit 8 |
| دبوس 20 | D9 — Data bit 9 (MSB) |
| دبوس 21 | INT — Interrupt / conversion complete output |
| دبوس 22 | HBEN — High-byte enable input |
| دبوس 23 | RD — Read input (active low) |
| دبوس 24 | CS — Chip select input (active low) |
التطبيقات النموذجية
MAX1093BEEG مناسب لـ 6 التطبيقs: Multi-Channel Data Acquisition Systems, Pen Digitizers and Touch Screen Sensing, Industrial Process Control & Instrumentation, Portable Battery-Powered Equipment, Low-Cost DSP Front-End Signal Acquisition, Test & Measurement Instrumentation.
Multi-Channel Data Acquisition Systems
The MAX1093BEEG's 4 single-ended / 2 pseudo-differential input multiplexer and integrated +2.5V reference make it a compact front-end for multi-channel data-acquisition systems (DAS). At 250 ksps with ±1 LSB INL over -40°C to +85°C, it captures transducer signals from thermocouples, RTDs, and bridge sensors with deterministic latency. The MAX1093BEEG pairs naturally with a microcontroller parallel bus, eliminating glue logic; designers using the +5V sibling MAX1092BEEG can drop either onto the same PCB layout.
موصى به
Pen Digitizers and Touch Screen Sensing
Pen-digitizer and resistive touch-screen controllers require fast, deterministic analog-to-digital conversion of X/Y position voltages with low latency. The MAX1093BEEG's 250 ksps sampling, 4-channel input mux, and pseudo-differential mode handle pen-position X, Y, and pressure signals directly from the touch-panel connector. Its automatic power-down with 2 µs wake-up time supports duty-cycled battery operation, extending runtime in portable tablets and handheld signature capture devices.
موصى به
Industrial Process Control & Instrumentation
Industrial process-control loops demand deterministic SAR latency, ±1 LSB linearity, and robust -40°C to +85°C operation. The MAX1093BEEG provides 4 single-ended inputs for reading 4-20 mA loop voltages, valve-position feedback, and sensor arrays simultaneously; its +2.5V internal reference eliminates precision external references and simplifies calibration. The parallel byte-wide interface connects directly to PLC microcontrollers without handshake glue, supporting deterministic control loop timing in noisy factory environments.
موصى به
Portable Battery-Powered Equipment
Battery-powered portable equipment benefits from the MAX1093BEEG's 1 µA automatic power-down current between conversions and 2.7V to 3.6V single-supply operation matches a single Li-ion cell. The MAX1093BEEG wakes in 2 µs and returns to sub-µA shutdown, allowing microcontrollers to duty-cycle conversions while maintaining sub-mW average power. This makes it suitable for handheld multimeters, portable patient monitors, and wireless sensor readouts where battery life directly impacts the user experience.
موصى به
Low-Cost DSP Front-End Signal Acquisition
Low-cost DSP-based audio and vibration systems benefit from the MAX1093BEEG's 250 ksps, 10-bit throughput and byte-wide parallel interface that maps directly to DSP data buses without external logic. The MAX1093BEEG provides deterministic SAR sampling for vibration analysis, motor-current sensing, and audio-bandwidth digitizing. For designs needing higher signal-to-noise, designers pair it with the MAX1092BEEG on +5V rails, or upgrade to MAX1068AEEG+ for 14-bit resolution.
موصى به
Test & Measurement Instrumentation
Test and measurement instruments require deterministic SAR sampling with calibrated 10-bit linearity, which the MAX1093BEEG delivers over -40°C to +85°C. The 4-channel input supports oscilloscope front-end sampling, multi-meter ranging, and bench-top data loggers with channel-to-channel isolation through pseudo-differential mode. The integrated +2.5V reference simplifies factory calibration; when finer accuracy is needed, designers trim REFADJ or override with an external precision reference.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MAX1093BEEG — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX1093AEEG | MAX1092BEEG | MAX1093BCEG | MAX1093ACEG | MAX1091BEEI+T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 24-pin QSOP | 24-pin QSOP - same | 24-pin QSOP - same | 24-pin QSOP - same | 24-pin QSOP - same | 28-pin QSOP |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Sampling Rate | 250 ksps | 250 ksps | 250 ksps | 250 ksps | 250 ksps | 250 ksps |
| Input Channels | 4 single-ended / 2 pseudo-diff | 4 / 2 | 4 / 2 | 4 / 2 | 4 / 2 | 8 / 4 |
| Supply Voltage | +2.7V to +3.6V | +2.7V to +3.6V | +4.75V to +5.25V | +2.7V to +3.6V | +2.7V to +3.6V | +2.7V to +3.6V |
| INL (max) | ±1 LSB | ±0.5 LSB | ±1 LSB | ±1 LSB | ±0.5 LSB | ±1 LSB |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C |
أبرز الفروقات
- Internal ±2V reference with REFADJ trim (مقابلMAX1093AEEG)
- Pin-compatible +5V family member available (مقابلMAX1092BEEG)
- Higher channel-count drop-in upgrade (مقابلMAX1091BEEI+T)
ملاحظات التصميم
Estimate: At 250 ksps continuous conversion the MAX1093BEEG draws approximately 1.9 mA from a +3V supply, equating to 5.7 mW of dissipation. In battery-powered designs, use the automatic power-down feature aggressively between conversions to drop quiescent current to 1 µA; in duty-cycled 1% sample time the average current approaches 20 µA. Place a 0.1 µF ceramic bypass capacitor directly at AVDD and another at DVDD, and keep analog and digital grounds joined at a single star point under the IC for best PSRR.
Route analog input traces as short, guarded differential pairs and keep them away from the parallel digital bus (D0-D9, CS, RD). The 24-pin QSOP has the analog pins on one side and digital pins on the other; this layout should be preserved on the PCB to maintain channel isolation. Place REFADJ bypass (4.7 µF typical) directly at pin 6 with a 0.01 µF ceramic in parallel to filter reference noise.
Avoid driving the MAX1093BEEG analog inputs beyond AVDD/AGND or with excessive source impedance - the SAR input presents a switched-capacitor load that benefits from a low-impedance op-amp buffer. Do not leave CS floating; tie CS high when not in use to prevent bus contention on D0-D9. Wake-up time of 2 µs must be observed between exiting power-down and starting conversions - refer to the datasheet for tWAIT timing when running duty-cycled conversions.
معلومات الامتثال
RoHS compliant per Maxim Integrated (now Analog Devices) product page; not AEC-Q100 qualified; industrial temperature grade -40°C to +85°C. The '+' suffix indicates RoHS-compliant lead-free packaging.
