AD7394BCPZ - 12-Bit Serial DAC | Analog Devices
MPN: AD7394BCPZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
AD7394BCPZ Overview
A digital-to-analog converter (DAC) is an electronic component that converts digital binary data into an analog voltage or current. DACs are essential in systems where digital processing must interface with the analog world, such as audio playback, motor control, and sensor calibration. The AD7394BCPZ belongs to the family of serial-input DACs, which use a simple SPI-compatible interface to receive data, reducing pin count and simplifying PCB layout compared to parallel-input DACs.
Key features of the AD7394BCPZ include 12-bit resolution, dual buffered outputs, and a rail-to-rail output swing. It offers a typical settling time of 10 microseconds, ensuring fast response in control loops. The device also includes a power-on reset circuit that sets the output to zero scale, preventing unwanted transients during power-up. Its low power consumption, typically 1.5 mA, is ideal for power-sensitive designs.
Technically, the AD7394BCPZ uses a resistor-string architecture with an internal output buffer, providing monotonic performance and low glitch energy. The serial interface supports daisy-chaining, allowing multiple DACs to be controlled with a single chip-select line. The device is specified over the industrial temperature range of -40°C to +85°C, ensuring reliable operation in harsh environments.
Typical applications include programmable voltage sources, digital gain and offset adjustment, and industrial process control. In audio systems, it can be used for volume control or tone adjustment. Its small footprint and low power make it suitable for portable instrumentation and battery-operated devices.
When designing with the AD7394BCPZ, ensure that the reference voltage is stable and adequately decoupled. The output buffer can drive capacitive loads up to 100 pF without oscillation, but larger loads may require an external buffer. Proper layout with a solid ground plane is recommended to minimize noise and achieve full 12-bit accuracy.
Drop-in alternatives for AD7394BCPZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7394BCPZ-RL7
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7394BCPZ-REEL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7394BCPZ-RL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7394BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Number of Channels | 2 |
| Interface | Serial (SPI-compatible) |
| Supply Voltage | 2.7 V to 5.5 V |
| Output Type | Voltage - Buffered |
| Settling Time | 10 µs (typical) |
| Output Voltage Range | 0 V to VREF |
| Reference Voltage | 0 V to VDD |
| Power Consumption | 1.5 mA (typical) |
| Operating Temperature | -40°C to +85°C |
| Package | 20-Lead LFCSP (4x4 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Differential Nonlinearity | ±1 LSB (max) |
AD7394BCPZ Pin Configuration
| Pin 1 | VDD — Positive supply voltage |
| Pin 2 | VREF — Reference voltage input |
| Pin 3 | GND — Ground |
| Pin 4 | OUTA — DAC A output |
| Pin 5 | OUTB — DAC B output |
| Pin 6 | SYNC — Active low chip select |
| Pin 7 | SCLK — Serial clock input |
| Pin 8 | SDIN — Serial data input |
| Pin 9 | SDO — Serial data output for daisy chain |
| Pin 10 | CLR — Asynchronous clear input |
| Pin 11 | LDAC — Load DAC latch |
| Pin 12 | PD — Power-down control |
Typical Applications
AD7394BCPZ is suitable for 6 applications: Programmable Voltage Source, Digital Gain and Offset Adjustment, Industrial Process Control, Portable Instrumentation, Audio Volume Control, Motor Control Setpoint.
Programmable Voltage Source
The AD7394BCPZ provides a precise, digitally controlled voltage output for calibration and test equipment. Its 12-bit resolution and low settling time enable accurate voltage stepping, while the dual channels allow simultaneous generation of two independent voltages. The serial interface simplifies integration with microcontrollers, and the wide supply range supports various system voltages.
Recommended
Digital Gain and Offset Adjustment
In signal conditioning circuits, the AD7394BCPZ can be used to trim gain and offset of amplifiers. By adjusting the DAC output, the operating point of the amplifier can be set precisely, compensating for component tolerances. The dual channels allow independent adjustment of gain and offset, and the low power consumption is beneficial in multi-channel systems.
Recommended
Industrial Process Control
The AD7394BCPZ is suitable for industrial control loops where analog setpoints are required. Its 12-bit resolution provides fine control, and the serial interface allows easy isolation using digital isolators. The industrial temperature range ensures reliable operation in factory environments, and the small package saves PCB space in control modules.
Recommended
Portable Instrumentation
Battery-powered instruments benefit from the AD7394BCPZ's low power consumption and small footprint. It can generate calibration voltages, set thresholds, or provide analog outputs for displays. The wide supply range allows direct operation from a 3.3V or 5V battery, and the power-on reset ensures safe startup.
Recommended
Audio Volume Control
In audio systems, the AD7394BCPZ can be used for digital volume control. Its low glitch energy and monotonic behavior ensure smooth volume changes without audible clicks. The dual channels allow independent left and right volume control, and the serial interface is easily controlled by an audio processor.
Recommended
Motor Control Setpoint
The AD7394BCPZ can provide analog setpoints for motor speed or position control. Its fast settling time allows quick updates, and the dual channels can control two motors independently. The industrial temperature range and robust design make it suitable for motor control in factory automation.
Recommended
Recommended Products Summary
Engineering reference data for AD7394BCPZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7394BRZ | AD7394ARZ | AD7394BCPZ-RL7 |
|---|---|---|---|---|
| Package | 20-Lead LFCSP | 20-Lead SOIC | 20-Lead SOIC | 20-Lead LFCSP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Channels | 2 | 2 | 2 | 2 |
| Supply Voltage | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| Settling Time | 10 µs | 10 µs | 10 µs | 10 µs |
| Interface | Serial | Serial | Serial | Serial |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
Key Differentiators
- Dual-channel output in a compact LFCSP package (vs AD7394BRZ)
- Low power consumption of 1.5 mA (vs AD7394ARZ)
- Wide supply voltage range of 2.7V to 5.5V (vs AD7394BRZ)
Design Notes
Decouple the VDD pin with a 0.1 µF ceramic capacitor placed as close as possible to the pin. Additionally, a 10 µF tantalum capacitor may be used for bulk decoupling. The reference input should also be decoupled with a 0.1 µF capacitor to ground to reduce noise.
Use a solid ground plane under the device to minimize noise and ensure accurate performance. Keep digital signals away from the analog output and reference traces. The exposed pad on the LFCSP package should be soldered to the ground plane for thermal and electrical benefits.
Ensure that the reference voltage does not exceed VDD. The output buffer can drive capacitive loads up to 100 pF; for larger loads, add an external buffer. Also, avoid floating the SYNC pin; tie it to VDD or GND as appropriate.
Compliance Information
RoHS compliant and lead-free per datasheet. Other compliance data not specified.
