Analog Devices Inc. AD5663BCPZ-R2

Overview

AD5663BCPZ-R2 from Analog Devices is a dual-channel, 16-bit buffered voltage-output DAC operating from a single 2.7 V to 5.5 V supply, delivering rail-to-rail output swing, ±12 LSB relative accuracy, and 7 μs settling time. It serves as a precision programmable voltage source in closed-loop control and calibration circuits requiring stable, low-drift analog outputs.

For engineers reviewing the AD5663BCPZ-R2 datasheet, AD5663BCPZ-R2 pinout, AD5663BCPZ-R2 application, or AD5663BCPZ-R2 equivalent, key selection considerations include guaranteed monotonicity, per-channel power-down (480 nA at 5 V), hardware LDAC/CLR functions, SPI-compatible 50 MHz serial interface, and support for external reference scaling.

Technical Context

The AD5663BCPZ-R2 implements a resistor string DAC architecture with on-chip rail-to-rail output amplifiers per channel, enabling full 0 V to VDD output range. Its 24-bit serial interface supports command-address-data framing with dedicated LDAC and asynchronous CLR inputs for synchronized updates and zero-scale reset.

Power-on reset ensures outputs power up to zero scale (not midscale), and software-selectable power-down modes reduce IDD to 0.48 μA per channel. The device requires an external reference (0.75 V to VDD) and exhibits DC crosstalk of ≤10 μV between channels under full-scale transitions.

Key Specifications

Pinout & Package

AD5663BCPZ-R2 is packaged in a 10-lead, 3 mm × 3 mm LFCSP_WD (lead-frame chip-scale package) with exposed pad. The package supports thermal performance of θJA = 61°C/W on a 4-layer board and requires the exposed pad to be connected to GND for optimal EMI suppression and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel voltage-output DAC applications.

Compared with AD5663BRMZ-REEL7, AD5663BCPZ-R2 offers superior thermal performance and smaller footprint, while AD5662BRMZ-REEL7 reduces channel count and cost but eliminates dual-output capability entirely.

Availability

AD5663BCPZ-R2 is available at Aetrix Electronics and suitable for process control, portable instrumentation, and data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for AD5663BCPZ-R2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD5663BCPZ-R2 belongs to the nanoDAC® family-designed specifically for precision, low-power, and small-footprint voltage-setting applications in industrial, instrumentation, and medical systems.

FAQ

What is the power-up state of the AD5663BCPZ-R2 outputs?

The AD5663BCPZ-R2 features a power-on reset circuit that forces both VOUTA and VOUTB to 0 V (zero scale) upon power application and holds them there until the first valid write occurs. This behavior is fixed for the AD5663BCPZ-R2 variant and differs from the AD5663BRMZ-1, which powers up to midscale. No external initialization sequence is needed to ensure safe startup.

Does the AD5663BCPZ-R2 require an external reference voltage?

Yes, the AD5663BCPZ-R2 requires an external reference voltage applied to the VREF pin to define its output full-scale range. The reference must be between 0.75 V and VDD, and the device draws 170–200 μA from this source. Using VDD as the reference is permitted but limits output resolution due to supply noise and drift; precision applications demand a low-noise, low-drift external reference.

Can the AD5663BCPZ-R2 drive capacitive loads?

Yes, the AD5663BCPZ-R2 output amplifiers are stable with capacitive loads up to 2 nF when unloaded (RL = ∞) and up to 10 nF when driving a 2 kΩ load to GND. For loads exceeding these values, external isolation resistors or compensation networks are required to prevent peaking or oscillation, as confirmed by Figure 23 in the AD5663 datasheet Rev. A.

How does the LDAC function work on the AD5663BCPZ-R2?

The LDAC pin on the AD5663BCPZ-R2 is an asynchronous, active-low control that simultaneously updates both DAC registers with data previously loaded into their respective input registers. A low pulse on LDAC transfers contents from input registers to DAC registers, causing immediate analog output changes on both VOUTA and VOUTB. LDAC can also be tied permanently low for automatic update on every write.

What is the maximum clock rate supported by the AD5663BCPZ-R2 serial interface?

The AD5663BCPZ-R2 supports a maximum SCLK frequency of 50 MHz across its full 2.7 V to 5.5 V supply range, as specified in Table 4 (Timing Characteristics) of the Rev. A datasheet. This allows complete 24-bit writes in under 500 ns, enabling high-speed configuration in FPGA- or DSP-based systems without bottlenecking the control interface.