MAX1093AEEG - 250ksps 4-Ch 10-Bit ADC +2.5V Ref | Maxim Integrated
MPN: MAX1093AEEG ✗ Cuối đờiMAX1093AEEG Tóm tắt
An SAR (Successive Approximation Register) ADC is a type of data converter that converts an analog input voltage into a digital code using a binary-search algorithm implemented by switching an internal capacitive DAC. SAR ADCs sit in the broader hierarchy of analog-to-digital converters (ADC -> data converter -> mixed-signal IC -> power management and signal-chain semiconductor). The MAX1093AEEG occupies the low-power, medium-speed tier of this hierarchy, optimized for portable instrumentation and battery-powered data acquisition systems where the combination of modest 250 ksps throughput, integrated reference, and automatic power-down enables long battery life without sacrificing conversion fidelity.
Key features of the MAX1093AEEG include an INL of 0.5 LSB (max), an input voltage range of 0 to +2.5V (single-ended) or +/-1.25V (pseudo-differential), 2 us wake-up from power-down, 4-channel analog input multiplexer, and an internal +2.5V reference. The integrated reference eliminates external reference circuitry and reduces PCB area, while the parallel interface allows direct connection to microcontrollers and DSPs without glue logic.
The MAX1093AEEG uses a charge-redistribution DAC architecture for the successive-approximation conversion. Automatic power-down between conversions reduces supply current to microampere levels, making the part well-suited for battery-powered applications. The internal +2.5V reference is trimmed for low drift, and the analog inputs feature a sample-and-hold stage that accepts rapidly changing signals without an external track-and-hold amplifier.
Typical applications include portable data loggers, pen-input digitizers, industrial process control, patient monitoring, and instrumentation where 10-bit resolution is sufficient and low power consumption is critical. The MAX1093AEEG also fits well in test and measurement front-ends and signal-conditioning subsystems requiring multiple input channels.
When designing with the MAX1093AEEG, ensure the input signal does not exceed the supply voltage (VDD up to +3.6V) or the reference voltage. Add a 100nF decoupling capacitor close to the AVDD pin and a 10uF bulk capacitor to filter low-frequency supply noise. Drive the analog inputs with low-impedance sources to maintain AC performance, and consider the input mux settling time when sequencing channel reads.
This page synthesizes distributor pricing, drop-in alternatives (including the +5V MAX1092BEEG and the 8-channel MAX1091 family), and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho MAX1093AEEG — 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 MAX1093AEEG (cùng hình factor và footprint) — khác nhau ở Input Voltage Range, Internal Reference, Wake-Up Time, Package, Resolution.
MAX1093BEEG
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MAX1093ACEG
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX1092BEEG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1093AEEG Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 10 bits |
| Number of Input Channels | 4 single-ended / 2 pseudo-differential |
| Tỷ lệ lấy mẫu | 250 ksps |
| Architecture | SAR (Successive Approximation) |
| Phạm vi điện áp đầu vào | 0 to +2.5V (single-ended), +/-1.25V (pseudo-differential) |
| INL (max) | 0.5 LSB |
| Internal Reference | +2.5V |
| Giao diện | Parallel (byte-wide) |
| Điện áp cung cấp | +2.7V to +3.6V |
| Wake-Up Time | 2 us |
| Power-Down Feature | Yes (automatic) |
| On-Chip Clock | Yes |
| Nhiệt độ hoạt động | 0C to +70C (commercial) |
| Hộp | 24-pin QSOP |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân MAX1093AEEG
| Chân 1 | AVDD — Analog supply voltage (+3V) |
| Chân 2 | AIN0 — Analog input channel 0 |
| Chân 3 | AIN1 — Analog input channel 1 |
| Chân 4 | AIN2 — Analog input channel 2 |
| Chân 5 | AIN3 — Analog input channel 3 |
| Chân 6 | REF — +2.5V reference output |
| Chân 7 | REFADJ — Reference adjust input |
| Chân 8 | AGND — Analog ground |
| Chân 9 | DGND — Digital ground |
| Chân 10 | DVDD — Digital supply voltage (+3V) |
| Chân 11 | CS — Chip select (active low) |
| Chân 12 | RD — Read strobe (active low) |
| Chân 13 | WR/RDY — Write/ready signal |
| Chân 14 | D0 — Parallel data bit 0 (LSB) |
| Chân 15 | D1 — Parallel data bit 1 |
| Chân 16 | D2 — Parallel data bit 2 |
| Chân 17 | D3 — Parallel data bit 3 |
| Chân 18 | D4 — Parallel data bit 4 |
| Chân 19 | D5 — Parallel data bit 5 |
| Chân 20 | D6 — Parallel data bit 6 |
| Chân 21 | D7 — Parallel data bit 7 (MSB) |
| Chân 22 | CNVST — Convert start input |
| Chân 23 | SHDN — Shutdown input (active low) |
| Chân 24 | CLK — External clock input (optional) |
Ứng dụng tiêu biểu
MAX1093AEEG phù hợp cho 6 Áp dụngs: Portable Data Loggers, Industrial Process Control, Patient Monitoring Equipment, Pen-Input Digitizers and Touch Tablets, Test and Measurement Front-Ends, Signal Conditioning Subsystems.
Portable Data Loggers
The MAX1093AEEG is ideal for battery-powered portable datagers due to its automatic power-down and 2 us wake-up. The internal +2.5V reference eliminates an external reference IC, saving board area in compact handheld enclosures. The 4 single-ended input channels cover multiple sensor inputs (temperature, pressure, humidity) without external muxing, while the 250 ksps sample rate handles vibration and acoustic-band signals. The byte-wide parallel interface streams digitized data directly to a low-power microcontroller without glue logic, keeping system BOM low.
Được đề xuất
Industrial Process Control
In industrial PLC analog input modules, the MAX1093AEEG digitizes 4-20 mA-conditioned sensor signals via pseudo-differential inputs. The +/-1.25V pseudo-differential input range naturally accommodates bipolar transducer outputs after signal conditioning, while the 0.5 LSB INL provides adequate linearity for 10-bit process control loops. The QSOP-24 footprint supports high-density multi-channel analog front-end designs, and the parallel interface reduces firmware complexity when interfacing with industrial DSPs.
Được đề xuất
Patient Monitoring Equipment
Medical patient monitoring systems use the MAX1093AEEG to digitize biosignals such as ECG, SpO2, and temperature in compact bedside monitors. The 250 ksps sample rate is sufficient for ECG bandwidth (typically <500 Hz sampled at 1-2 ksps per channel) while 4 channels support multi-lead acquisition. The internal reference and automatic power-down extend battery life in portable telemetry units, and the QSOP-24 package enables slim form-factor designs required by wearable monitors.
Được đề xuất
Pen-Input Digitizers and Touch Tablets
Digitizer tablets rely on the MAX1093AEEG to sample pen-position sensor signals at 250 ksps with 10-bit resolution, which provides sub-0.1 percent full-scale positional accuracy for handwriting recognition. The 4 single-ended inputs handle multiple pen-axis sensor channels, while the parallel byte-wide interface streams samples directly to the host processor without DMA delays. The 2 us wake-up enables instant response when the stylus touches the active area, critical for low-latency input feel.
Được đề xuất
Test and Measurement Front-Ends
Bench multimeters and portable instrumentation use the MAX1093AEEG as a multi-channel ADC front-end, taking advantage of its 250 ksps throughput and integrated +2.5V reference for self-calibrated readings. The 4 single-ended channels allow simultaneous measurement of voltage, current, and temperature in compact DMM designs, while the parallel interface simplifies data transfer to instrumentation microcontrollers. The 0.5 LSB INL supports 10-bit measurement accuracy suitable for general-purpose bench tools.
Được đề xuất
Signal Conditioning Subsystems
Embedded signal-conditioning subsystems use the MAX1093AEEG to digitize analog sensor outputs after front-end amplification and filtering. The pseudo-differential input mode rejects common-mode noise on long sensor cables, while the integrated +2.5V reference ratiometrically scales the input range for accurate conversion. The 250 ksps sample rate captures transient events in vibration monitoring and motor control feedback loops, and the QSOP-24 package fits into compact interface boards alongside op-amp signal chains.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX1093AEEG — 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 | MAX1093BEEG | MAX1093ACEG | MAX1092BEEG |
|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | QSOP-24 | QSOP-24 - same | QSOP-24 - same | QSOP-24 - same |
| Resolution | 10 bits | 10 bits | 10 bits | 10 bits |
| Supply Voltage | +2.7V to +3.6V | +2.7V to +3.6V | +2.7V to +3.6V | +4.75V to +5.25V (+5V version) |
| Input Channels | 4 single-ended / 2 pseudo-diff | 4 single-ended / 2 pseudo-diff | 4 single-ended / 2 pseudo-diff | 4 single-ended / 2 pseudo-diff |
| Sample Rate | 250 ksps | 250 ksps | 250 ksps | 400 ksps |
| Internal Reference | +2.5V | +2.5V | +2.5V | +2.5V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- Integrated +2.5V reference saves external reference IC (vsMAX1092BEEG)
- Lower power consumption via automatic power-down (vsMAX1093ACEG)
- B-grade variant offers tighter linearity (vsMAX1093BEEG)
Ghi chú thiết kế
Decouple AVDD and DVDD with a 100nF ceramic capacitor placed within 5mm of each supply pin, plus a 10uF bulk tantalum or ceramic capacitor on AVDD to filter low-frequency supply noise. The internal +2.5V reference draws current only during conversion, so transient load on AVDD can affect reference stability - place the 10uF capacitor as close to AVDD as practical. Use separate analog and digital ground planes joined at a single point near the AGND pin to avoid ground-loop noise coupling into the analog inputs.
Route analog input traces (AIN0-AIN3) as short, guarded differential pairs and keep them away from the parallel data bus (D0-D7) to minimize digital-to-analog crosstalk. Place a ground fill under and around the analog input traces, and use a separate analog ground island that joins the digital ground only at the AGND pin. If using the pseudo-differential mode, route AIN+ and AIN- as a matched pair with equal length to maintain common-mode rejection.
Do not apply analog inputs that exceed AVDD or drop below AGND - this can latch-up the input ESD diodes and corrupt conversions. The SHDN pin must be held high (logic 1) for normal operation; if left floating, the part may enter an indeterminate state. When using the CNVST pin to start conversions, ensure the pulse width meets the minimum timing specification in the datasheet (typically >20ns). Do not enable the internal reference and drive an external reference simultaneously on REF - this can cause reference contention and degraded performance.
Thông tin tuân thủ
Part is obsolete on the Analog Devices product page. RoHS/REACH/AEC-Q100 status not explicitly stated in verified web data; marked unknown. Lead-free per Maxim Integrated legacy datasheet.
