MCP4728-E/UN - 12-Bit Quad DAC I2C EEPROM MSOP-10 | Microchip
부품 번호: MCP4728-E/UN ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $3.04 | $3.04 |
| 10 | $2.73 | $27.30 |
| 100 | $2.31 | $231.00 |
| 500 | $1.94 | $970.00 |
| 1,000 | $1.65 | $1,650.00 |
MCP4728-E/UN 개요
What is a quad voltage-output DAC? A DAC (Digital-to-Analog Converter) translates a digital code into an analog voltage or current. A voltage-output DAC integrates an output amplifier that buffers the internal reference node, allowing the analog output to drive real-world loads directly. A quad DAC combines four independent converters on a single die, simplifying multi-channel designs such as waveform synthesis, programmable sensor excitation, and multi-point trim. As a sub-category of data converters, the quad DAC sits in the broader signal-chain hierarchy: data converter -> DAC -> voltage-output DAC -> multi-channel DAC -> power management/analog signal chain IC.
Key features include four 12-bit resolution channels, an integrated 2.048 V internal reference with optional VDD reference, rail-to-rail output swing, individual EEPROM storage per channel for input code and configuration bits, and selectable I2C address bits (up to 8 slave addresses). The settling time to 1/2 LSB is typically 6 microseconds, and the device draws only 40 nA typical standby current with shutdown support per channel. The MSOP-10 footprint allows compact PCB placement suitable for portable and space-constrained applications.
The MCP4728-E/UN uses a resistor-string architecture with on-chip EEPROM, allowing the DAC input codes, gain, power-down, and I2C address bits to be programmed to non-volatile memory. The high rail-to-rail output swing combined with low power consumption makes it suitable for battery-powered portable instruments where each channel can output independent analog voltages without external op-amps.
Typical applications include digital audio volume and tone control, motor control reference setpoints, programmable sensor calibration, multi-channel instrumentation, and configurable system biasing. Designers also use it in waveform generators for arbitrary-function-signal reconstruction and as a low-power replacement for mechanical potentiometers in user-interface trimming.
When designing with the MCP4728-E/UN, ensure the supply decoupling capacitors (typically 0.1 microfarad ceramic) are placed as close as possible to VDD and GND. Use the I2C bus pull-up resistors appropriate to the selected clock rate, and verify the SDA/SCL rise times against the I2C specification for the chosen VDD voltage.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes that complement the Microchip datasheet (DS22187E) with real-world procurement and selection guidance for engineers.
드롭인 대체품: MCP4728-E/UN — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MCP4728T-E/UN
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MCP4728A0-E/UN
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MCP4728A1-E/UN
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MCP4728A2-E/UN
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MCP4728A3-E/UN
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MCP4728-E/UN 최대 정격 & 전기적 특성
| 분해능 | 12 bits |
| Number of Channels | 4 |
| Architecture | Resistor String |
| 출력 유형 | Voltage (Rail-to-Rail) |
| 인터페이스 | I2C (Standard, Fast, High-Speed) |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| Internal Reference | 2.048 V |
| External Reference Option | VDD |
| Settling Time (1/2 LSB) | 6 us (typical) |
| Standby Current | 40 nA (typical, per channel shutdown) |
| Non-Volatile Memory | EEPROM (per channel) |
| I2C Address Options | 8 selectable addresses via ADDR pins |
| 패키지 | MSOP-10 |
| 동작 온도 범위 | -40C to +125C (E suffix) |
| RoHS 상태 | Compliant |
MCP4728-E/UN 핀 구성
| 핀 1 | VOUTA — DAC channel A voltage output |
| 핀 2 | VOUTB — DAC channel B voltage output |
| 핀 3 | VOUTC — DAC channel C voltage output |
| 핀 4 | VOUTD — DAC channel D voltage output |
| 핀 5 | GND — Common ground reference |
| 핀 6 | SCL — I2C serial clock input |
| 핀 7 | SDA — I2C serial data input/output |
| 핀 8 | VDD — Positive power supply (2.7 V to 5.5 V) |
| 핀 9 | A0 — I2C slave address select bit 0 |
| 핀 10 | A1 — I2C slave address select bit 1 |
일반적인 애플리케이션
MCP4728-E/UN 적합 용도: 6 애플리케이션s: Digital Audio Volume and Tone Control, Programmable Sensor Calibration and Excitation, Motor Control Reference Setpoints, Multi-Channel Instrumentation and Biasing, Configurable System Biasing and Setpoint Generation, Waveform Generator and Function Synthesis.
Digital Audio Volume and Tone Control
The MCP4728-E/UN provides four independent 12-bit voltage-output DACs in a single MSOP-10 package, ideal for setting audio codec volume, balance, and tone control points. With its 6 microsecond settling time and rail-to-rail output swing, the device can drive audio potentiometer-replacement networks with low distortion. The on-chip EEPROM retains calibration settings across power cycles, eliminating software initialization delays at startup. The internal 2.048 V reference option simplifies gain calibration, and the I2C interface allows microcontroller-free manual adjustment via hardware strapping. This makes the part well-suited for headphone amplifiers and multi-zone residential audio distribution where four analog control voltages replace four mechanical potentiometers, reducing BOM cost and PCB area.
추천
Programmable Sensor Calibration and Excitation
The MCP4728-E/UN generates four programmable excitation voltages for bridge sensors, RTDs, and thermistor bias networks in precision instrumentation. Each channel's 12-bit resolution (1 mV per LSB at 4.096 V full scale) provides adequate calibration granularity for industrial transmitters. Per-channel EEPROM storage lets designers lock calibration coefficients into the DAC itself, removing the need for separate EEPROM ICs. The 2.7 V to 5.5 V supply range matches battery and 3.3 V/5 V industrial rails. Typical use includes 4-20 mA loop calibration boards, strain-gauge excitation trimming, and multi-point temperature compensation networks where four reference voltages are needed simultaneously.
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Motor Control Reference Setpoints
The MCP4728-E/UN serves as a four-channel setpoint generator in BLDC and stepper motor drive systems, providing independent voltage references for current-loop command, speed reference, torque limit, and field weakening. The 6 microsecond settling time supports closed-loop update rates above 100 kHz when paired with modern FOC controllers. The on-board EEPROM stores motor-tuning parameters, allowing the drive to power up with pre-calibrated references without external memory. Its small MSOP-10 footprint fits motor-control daughter boards where PCB real estate is constrained. The rail-to-rail output swing directly interfaces with op-amp command inputs without additional buffering.
추천
Multi-Channel Instrumentation and Biasing
The MCP4728-E/UN provides four configurable analog bias voltages for automated test equipment, programmable gain amplifiers, and multi-channel data-acquisition front-ends. Engineers use the part to set comparator thresholds, PGA gain codes, and op-amp offset trim voltages in a single IC. The selectable I2C address (8 options via ADDR pins) lets designers place up to eight MCP4728 devices on a single I2C bus, expanding to 32 independent analog outputs. The 40 nA standby current per channel makes the part suitable for handheld multimeters and battery-powered data loggers. EEPROM storage of test calibration tables enables field-replaceable modules that self-calibrate at insertion.
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Configurable System Biasing and Setpoint Generation
The MCP4728-E/UN is widely used to replace mechanical potentiometers in embedded system bias networks, providing software-controlled reference voltages for power-supply trim, RF power detector thresholds, and display contrast. The 12-bit resolution and rail-to-rail output allow the part to set bias points from 0 V to VDD with 1 mV granularity at 4.096 V full scale. Designers benefit from the EEPROM-retention feature: bias settings programmed at factory calibration remain intact across power cycles, eliminating drift and reducing field support calls. The I2C interface enables remote re-calibration over diagnostics buses without manual adjustment.
추천
Waveform Generator and Function Synthesis
The MCP4728-E/UN generates arbitrary waveform outputs for low-frequency signal generators, function synthesizers, and educational laboratory equipment. With 12-bit resolution and four synchronized channels, the part produces phase-shifted sine, triangle, and pulse-width-modulated signals suitable for audio-band and instrumentation testing. The I2C-compatible interface allows microcontroller-driven frequency synthesis up to several kilohertz. The internal 2.048 V reference option eliminates external reference ICs for low-voltage waveform outputs. With 40 nA standby current per channel and channel-independent shutdown, the part fits battery-powered handheld signal sources where multi-channel waveform synthesis replaces discrete analog oscillator circuits.
추천
추천 제품 요약
엔지니어링 참조 데이터: MCP4728-E/UN — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MCP4728T-E/UN | MCP4728A0-E/UN | MCP4728A1-E/UN | MCP4728A2-E/UN | MCP4728A3-E/UN |
|---|---|---|---|---|---|---|
| Package | MSOP-10 | MSOP-10 - same | MSOP-10 - same | MSOP-10 - same | MSOP-10 - same | MSOP-10 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Internal Reference | 2.048 V | 2.048 V | 2.048 V | 2.048 V | 2.048 V | 2.048 V |
| Default I2C Address | User-selectable (8 options) | User-selectable (8 options) | Factory A0h | Factory A1h | Factory A2h | Factory A3h |
| Settling Time | 6 us | 6 us | 6 us | 6 us | 6 us | 6 us |
| Packaging | Tube | Tape & Reel | Tube | Tube | Tube | Tube |
주요 차별점
- Quad 12-bit DAC with on-chip EEPROM (vs MCP4725A0T-E/CH)
- User-configurable I2C address with 8 options (vs MCP4728A0-E/UN)
- Rail-to-rail output swing with internal 2.048 V reference option (vs MCP4725 (single-channel, 5.5 V only))
설계 노트
Place a 0.1 microfarad ceramic decoupling capacitor as close as possible to the VDD pin (pin 8), with a 10 microfarad bulk capacitor on the same supply rail. The MCP4728-E/UN draws only 40 nA standby current per channel, but active-mode transient currents during output transitions can exceed several milliamps for a few microseconds. Adequate decoupling prevents VDD droop that could otherwise couple into adjacent analog channels through the shared reference, degrading channel-to-channel crosstalk performance.
Route SDA and SCL traces away from the VOUTA-VOUTD analog outputs to minimize digital-to-analog crosstalk. Keep the analog output traces short and surrounded by a ground pour to reduce EMI pickup. The A0 and A1 address pins (pins 9 and 10) should be tied directly to VDD or GND with no floating state at power-up, since the I2C slave address is latched at the rising edge of VDD. A floating address pin may result in intermittent communication failures.
Do not exceed the absolute maximum VDD of 6.5 V or operate below 2.7 V, as the EEPROM programming sequence requires a minimum 2.7 V supply. The internal 2.048 V reference option limits output swing to 0 V to 2.048 V regardless of VDD - select the VDD reference via the configuration bits if higher output swing is needed. Avoid hot-plugging the I2C bus without proper power sequencing, as the EEPROM may enter an indeterminate state if VDD ramps slower than 100 microseconds.
규정 준수 정보
RoHS compliant and lead-free per Microchip product page and DigiKey listing. Not AEC-Q100 qualified - choose automotive-grade alternatives if required.
