MCP4728-E/UN - 12-Bit Quad DAC I2C EEPROM MSOP-10 | Microchip
MPN: MCP4728-E/UN ✓ Hoạt độngMCP4728-E/UN Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MCP4728-E/UN — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
MCP4728T-E/UN
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCP4728A0-E/UN
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCP4728A1-E/UN
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MCP4728A2-E/UN
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MCP4728A3-E/UN
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MCP4728-E/UN Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Number of Channels | 4 |
| Architecture | Resistor String |
| Kiểu đầu ra | Voltage (Rail-to-Rail) |
| Giao diện | 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 |
| Hộp | MSOP-10 |
| Khoảng nhiệt độ hoạt động | -40C to +125C (E suffix) |
| Trạng thái RoHS | Compliant |
Cấu hình chân MCP4728-E/UN
| Chân 1 | VOUTA — DAC channel A voltage output |
| Chân 2 | VOUTB — DAC channel B voltage output |
| Chân 3 | VOUTC — DAC channel C voltage output |
| Chân 4 | VOUTD — DAC channel D voltage output |
| Chân 5 | GND — Common ground reference |
| Chân 6 | SCL — I2C serial clock input |
| Chân 7 | SDA — I2C serial data input/output |
| Chân 8 | VDD — Positive power supply (2.7 V to 5.5 V) |
| Chân 9 | A0 — I2C slave address select bit 0 |
| Chân 10 | A1 — I2C slave address select bit 1 |
Ứng dụng tiêu biểu
MCP4728-E/UN phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MCP4728-E/UN — 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 | 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 |
Bảo phân biệt quan trọng
- Quad 12-bit DAC with on-chip EEPROM (vsMCP4725A0T-E/CH)
- User-configurable I2C address with 8 options (vsMCP4728A0-E/UN)
- Rail-to-rail output swing with internal 2.048 V reference option (vsMCP4725 (single-channel, 5.5 V only))
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip product page and DigiKey listing. Not AEC-Q100 qualified - choose automotive-grade alternatives if required.
