MAX4062EUB+ - Differential Mic Preamplifier, 2.4V-5.5V | Maxim
MPN: MAX4062EUB+ ✓ Hoạt độngMAX4062EUB+ Tóm tắt
A differential microphone preamplifier is a small-signal audio amplifier that senses the voltage difference between an electret or MEMS microphone's output terminals and rejects common-mode interference picked up on the microphone lines. Within the signal-chain hierarchy (sensor -> preamplifier -> ADC/codec -> baseband), the microphone preamplifier is the first analog gain stage and largely determines the noise floor and dynamic range of a voice recording path. Differential input architectures are preferred in portable electronics because handset wiring is short, high-impedance, and exposed to RF and display noise.
Key features of the MAX4062EUB+ include the integrated microphone bias generator, rail-to-rail output stage (Class AB per DigiKey categorization), complete shutdown for power savings in battery-operated systems, adjustable gain set by external resistors, and industrial temperature grade. The wide 2.4V to 5.5V supply range allows direct operation from a single Li-ion cell or a 3.3V/5V rail without a dedicated regulated supply.
Architecturally, the device belongs to the MAX4060/MAX4061/MAX4062 family; the MAX4062 variant is the member with internal bias and complete shutdown. Excellent PSRR and CMRR keep display, RF, and switching-regulator noise out of the microphone path, a critical attribute for low-noise portable audio as stated in the Maxim/ADI datasheet general description.
Typical applications are notebook PC microphone inputs, PDA voice recorders, smartphone/handset voice paths, and VoIP headsets - any battery-powered system where a differential electret or MEMS microphone must be amplified and biased from a limited power budget.
Design-wise, set the gain with the external feedback resistors and verify that the bias source can supply the chosen microphone's current; place the bias-decoupling capacitor close to the bias pin to preserve noise performance.
This page synthesizes distributor listing data, family cross-references, and practical design notes beyond what a plain datasheet mirror provides, with pricing as of 2026-10-12.
Bộ thay thế dễ dàng lắp đặt cho MAX4062EUB+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
MAX4060AUB+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX4061AUB+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX4060EUB+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX4062ESA+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX4061ESA+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX4062EUB+ Tỷ lệ tối đa & tính chất điện
| Chức năng | Differential microphone preamplifier with internal bias |
| Supply Voltage Range | 2.4 V to 5.5 V |
| Kênh | 2-Channel (Stereo), Class AB |
| Hộp | 10-uMAX/uSOP (MSOP-10) |
| Input Type | Differential |
| Kiểu đầu ra | Rail-to-rail |
| Microphone Bias | Internal bias included |
| Shutdown | Complete shutdown |
| Gain | Adjustable (external resistors) |
| Temperature Grade | Industrial |
| Kiểu lắp đặt | Surface Mount, Gull Wing |
| Number of Terminals | 10 |
| Applications | Notebook and PDA audio systems |
Hướng dẫn cấu hình chân MAX4062EUB+ 10-umax/usop (msop-10)
Cấu hình chân cho MAX4062EUB+ (10-umax/usop (msop-10) gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho MAX4062EUB+.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MAX4062EUB+ phù hợp cho 6 Áp dụngs: Notebook PC Microphone Input, PDA Voice Recorder, VoIP Headset and Handset Audio, Smart Doorbell and Intercom Voice Path, Security Camera Audio Channel, Industrial Voice-Command Control Panels.
Notebook PC Microphone Input
The MAX4062EUB+ was explicitly optimized for notebook audio systems, where a differential electret microphone must be amplified near the audio codec with minimal board area. The 2.4V to 5.5V supply range allows direct connection to the notebook's always-on 3.3V rail, and the integrated bias source eliminates the resistor-dividers and RC filtering normally needed to power the capsule. Its excellent PSRR suppresses noise from switching regulators driving the display and CPU rails, while complete shutdown silences the bias and amplifier when the microphone is not in use, protecting battery life. Gain is set with two external resistors to match codec full-scale input.
Được đề xuất
PDA Voice Recorder
Handheld PDA and voice-recorder designs benefit from the MAX4062EUB+ combination of small 10-pin uMAX footprint, mic-level gain, and integrated bias. Because the entire record path shares the battery with the RF and display sections, the preamp's high CMRR rejects common-mode noise coupled onto the short microphone leads, and its differential input cancels ground-bounce between the mic board and the main PCB. Shutdown mode drops the amplifier and bias together, so standby record-circuit current approaches the system leakage floor. The rail-to-rail output lets the ADC or codec use nearly the full supply swing, maximizing recording dynamic range on a 3.0V-4.2V Li-ion cell.
Được đề xuất
VoIP Headset and Handset Audio
In VoIP handsets and USB headsets, the MAX4062EUB+ amplifies the differential electret capsule before the audio codec or USB audio controller. The internal bias removes external bias components, and the 2.4V floor permits operation directly from low-voltage headset supply rails. Adjustable gain lets one PCB serve multiple capsule sensitivities. Its Class AB rail-to-rail output drives codec inputs without an additional buffer stage. Complete shutdown mutes the path during mute-switch states, avoiding residual hiss in the far-end audio. Excellent PSRR keeps USB-bus noise from leaking into the voice band, an audible problem in bus-powered headsets.
Được đề xuất
Smart Doorbell and Intercom Voice Path
Battery- and low-voltage-powered intercoms and smart doorbells need a mic preamp that works from a single Li-ion cell across its discharge range - the 2.4V minimum supply of the MAX4062EUB+ covers this. The differential input rejects motor and RF noise common in door-chime and access-control environments, and the internal bias simplifies capsule wiring over longer cable runs. Complete shutdown allows the voice path to be fully powered down between wake events, critical for battery lifetime targets measured in months. Gain setting via external resistors lets installers trim sensitivity for outdoor versus indoor acoustic environments.
Được đề xuất
Security Camera Audio Channel
Surveillance and IP cameras integrate a microphone for audio evidence capture. The MAX4062EUB+ provides the first gain stage for a differential capsule, and its high CMRR suppresses the switching noise of the camera's DC-DC converters that share ground with the mic circuit. The 5.5V maximum supply accepts unregulated 5V camera rails directly. Complete shutdown lets the audio channel follow privacy-mode commands without a separate analog switch. The rail-to-rail output maximizes ADC input swing so quiet speech remains above the converter noise floor - important because security audio is often captured at 8-16 kHz bandwidth with modest-resolution codecs.
Được đề xuất
Industrial Voice-Command Control Panels
Voice-activated industrial panels and two-way communication stations use the MAX4062EUB+ for capsule amplification in electrically noisy environments. The industrial temperature grade and the excellent PSRR/CMRR stated in the ADI datasheet make the part appropriate for panels near motor drives and relays, where common-mode noise on microphone wiring is severe. The wide supply range tolerates 24V-system-derived 5V rails with regulation tolerance. Integrated bias reduces the BOM on sealed panels where service access is costly. Complete shutdown permits acoustic wake-word front ends to gate the analog path, trimming idle consumption in always-listening installations.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX4062EUB+ — 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 | MAX4060AUB+ | MAX4061AUB+ | MAX4062ESA+ | MAX4061ESA+ |
|---|---|---|---|---|---|
| Package | 10-uMAX/uSOP | 10-uMAX/uSOP - same | 10-uMAX/uSOP - same | SOIC-8 | SOIC-8 |
| Brand | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) |
| Supply Voltage Range | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V |
| Internal Mic Bias | Yes | No (per family feature split) | Configuration differs - verify datasheet | Yes (same die, SOIC-8) | Configuration differs - verify datasheet |
| Complete Shutdown | Yes | Feature set differs - verify datasheet | Feature set differs - verify datasheet | Yes (same die) | Feature set differs - verify datasheet |
| Input Type | Differential | Differential | Differential | Differential | Differential |
| Output Stage | Rail-to-rail, Class AB | Rail-to-rail, Class AB | Rail-to-rail, Class AB | Rail-to-rail, Class AB | Rail-to-rail, Class AB |
| Pin Count | 10 | 10 | 10 | 8 | 8 |
Bảo phân biệt quan trọng
- Integrated microphone bias eliminates external bias components (vsMAX4060AUB+)
- Complete shutdown saves battery in idle voice paths (vsMAX4061AUB+)
- 10-pin uMAX footprint smaller than SOIC-8 options (vsMAX4062ESA+)
Ghi chú thiết kế
Place the MAX4062EUB+ within a few millimeters of the microphone connector and keep the differential input traces as a tight, length-matched pair. Guard the input pair with ground to prevent coupling from display and CPU clocks common in notebook layouts. The internal bias pin needs local decoupling (typically 0.1uF plus a bulk capacitor) right at the pin to keep bias noise low; route the bias as a quiet star rather than sharing it across multiple mics.
Power the MAX4062EUB+ from a clean analog rail, not directly from a switching regulator output. Even with excellent PSRR, a buck converter running at audible-adjacent ripple frequencies can degrade the noise floor. Estimated: at a typical voice-band mic-pre load of a few milliamps from a 3.3V rail, dissipation is under 20 mW, so no thermal design is required - the uMAX-10 package handles the load without copper pour. Verify exact quiescent current from the ADI datasheet for your battery-budget calculation.
Do not assume all MAX4060/MAX4061/MAX4062 family members are interchangeable: the MAX4062 is the member with internal bias plus complete shutdown, and the siblings differ in these features. Also avoid confusing the '+' (RoHS) and non-'+' order codes when buying legacy stock - the '+' suffix denotes the lead-free version. Set gain conservatively so the rail-to-rail output is not clipped by loud speech; excessive gain is the most common cause of distorted voice recordings in handset designs.
Thông tin tuân thủ
The '+' suffix in MAX4062EUB+ denotes the RoHS/lead-free version per Maxim/ADI part-numbering convention. REACH and halogen-free status to be confirmed via ADI compliance documentation for the specific date code.
