Analog Devices Inc. AD5327ARU-REEL7

Overview

AD5327ARU-REEL7 from Analog Devices is a quad 12-bit buffered voltage-output DAC in 16-lead TSSOP, operating from 2.5 V to 5.5 V with 400 μA typical supply current at 3 V. It delivers rail-to-rail output swing (0 V to VREF or 0 V to 2×VREF), ±10 LSB INL (B version), and simultaneous output update via LDAC pin. Used in precision programmable voltage sources for industrial process control.

For engineers reviewing the AD5327ARU-REEL7 datasheet, AD5327ARU-REEL7 pinout, AD5327ARU-REEL7 application, or AD5327ARU-REEL7 equivalent, key selection criteria include guaranteed monotonicity, 0.7 V/μs slew rate, SPI/QSPI/MICROWIRE-compatible 3-wire interface, daisy-chain SDO support, and −40°C to +105°C operation.

Technical Context

The AD5327ARU-REEL7 implements four independent resistor-string DAC cores, each with dedicated on-chip rail-to-rail output buffer amplifiers and configurable reference inputs (VREFAB for DAC A/B, VREFCD for DAC C/D). Its double-buffered input logic separates data loading from DAC register update, enabling glitch-free synchronized output changes.

It supports buffered or unbuffered reference modes per DAC pair, power-down mode reducing current to 90 nA @ 3 V, and asynchronous clear (CLR) and load-DAC (LDAC) functions. The serial interface operates up to 30 MHz with precise timing margins (e.g., t5 = 5 ns data setup, t13 ≤ 25 ns SDO valid delay).

Key Specifications

Pinout & Package

AD5327ARU-REEL7 is housed in a 16-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 5.0 mm body, 0.65 mm pitch, thermally enhanced for industrial reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5328BRUZ and MAX5216ETE+, AD5327ARU-REEL7 uniquely combines dual configurable reference inputs, guaranteed monotonicity, 90 nA power-down, and true simultaneous output update-making it optimal for precision multi-channel calibration and control where timing coordination and reference flexibility are critical.

Availability

AD5327ARU-REEL7 is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, programmable voltage sources, and digital calibration systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD5327ARU-REEL7 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 AD53xx family-including AD5327ARU-REEL7-is designed specifically for precision multi-channel voltage generation in industrial automation, test equipment, and portable instrumentation where resolution, monotonicity, and low power are essential.

FAQ

What is the guaranteed integral nonlinearity (INL) specification for AD5327ARU-REEL7?

The AD5327ARU-REEL7 B version guarantees ±10 LSB INL over the full operating temperature range (−40°C to +105°C). This is confirmed in the Rev. D datasheet Table 1 under "AD5327" row, "B Version" column, and applies to all four DAC channels. The A version offers ±16 LSB INL. Both versions are monotonic by design across all codes.

Does AD5327ARU-REEL7 support simultaneous update of all four DAC outputs?

Yes, AD5327ARU-REEL7 supports true simultaneous update via its dedicated LDAC (Load DAC) pin. When pulsed low, LDAC transfers data from all four input registers to their respective DAC registers in one atomic operation-ensuring synchronized output transitions without inter-channel skew. This is explicitly documented in the General Description and Functional Block Diagram sections of the datasheet.

What reference voltage configurations does AD5327ARU-REEL7 support?

AD5327ARU-REEL7 supports two independent reference inputs: VREFAB for DACs A/B and VREFCD for DACs C/D. Each can be configured as buffered (input range: 1 V to VDD) or unbuffered (0.25 V to VDD) via BUF bits in the serial command word. Output range is selectable as 0 V to VREF or 0 V to 2×VREF-enabling flexible gain scaling without external op-amps.

What is the power-down current consumption of AD5327ARU-REEL7 at 3 V?

AD5327ARU-REEL7 draws only 90 nA in power-down mode at 3 V, as specified in the "POWER REQUIREMENTS" section of the Rev. D datasheet (Table 1, IDD Power-Down Mode row). This ultra-low current is achieved by asserting the active-low PD pin, placing all DACs in high-impedance state while preserving register contents.

Is AD5327ARU-REEL7 compatible with standard microcontroller SPI interfaces?

Yes, AD5327ARU-REEL7 is fully compatible with standard SPI, QSPI, MICROWIRE, and DSP serial interfaces. Its 3-wire protocol (DIN, SCLK, SYNC) uses falling-edge data capture and supports clock rates up to 30 MHz. Timing parameters-including t5 (5 ns data setup) and t13 (≤25 ns SDO valid)-are compliant with common MCU SPI peripherals when operated within specified voltage and temperature ranges.