Analog Devices Inc. DAC8841FP

Overview

DAC8841FP from Analog Devices is an 8-bit octal 2-quadrant multiplying CMOS DAC replacing eight mechanical potentiometers in precision analog signal level adjustment. It operates from a single +5 V supply, delivers ±3 V output swing, supports 1 MHz multiplying bandwidth, and features individual reference inputs per channel with midscale preset (80h) for fast system initialization.

For engineers reviewing the DAC8841FP datasheet, DAC8841FP pinout, DAC8841FP application, or DAC8841FP equivalent, this page provides verified technical context, real-world timing behavior, confirmed channel-to-channel crosstalk (70 dB @ 100 kHz), actual settling time (3.5–6 µs), and validated serial interface timing constraints including 12-bit address+data decode and daisy-chain SDO support.

Technical Context

The DAC8841FP integrates eight independent voltage-output DACs with buffered amplifiers, each accepting separate reference inputs (V_INX, V_REFL) and delivering fully buffered outputs (±3 V swing into 10 kΩ). Its 2-quadrant multiplication architecture enables gain/attenuation of ac or dc signals up to 1 MHz without polarity inversion.

It uses a 3-wire serial interface (CLK, SDI, LD) with 12-bit words: 4-bit address selects one of eight DAC registers, and 8-bit data loads the value. A dedicated PR pin forces all registers to 80h (midscale) asynchronously, while SDO enables cascaded multi-DAC configurations without external decoding logic.

Key Specifications

Pinout & Package

DAC8841FP is housed in a 24-pin plastic DIP package (0.300" wide), with through-hole mounting and industry-standard footprint. Pin spacing is 0.100" (2.54 mm), compatible with standard prototyping and production assembly processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal DAC applications.

Compared with AD5280BRUZ-100 and DAC8830IDBVR, DAC8841FP uniquely combines octal integration, hardware midscale preset, 1 MHz multiplying bandwidth, and true 2-quadrant operation in a single 24-pin DIP - enabling compact, high-speed analog signal conditioning without external support circuitry.

Availability

DAC8841FP is available at Aetrix Electronics and suitable for trimmer replacement, dynamic level adjustment, programmable gain amplifiers, and special waveform generation requiring stable component supply across industrial, test & measurement, and medical electronics programs.

Supply support for DAC8841FP 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 DAC8841FP belongs to Analog Devices' TrimDAC™ family - engineered specifically to replace mechanical potentiometers in high-reliability analog signal conditioning applications demanding precision, speed, and multi-channel integration.

FAQ

What is the maximum operating frequency for analog signal multiplication using DAC8841FP?

The DAC8841FP supports a 2-quadrant multiplying bandwidth of 1 MHz, meaning it maintains accurate linear gain control for input signals up to 1 MHz. This is verified under conditions of V_INX = 100 mV_p-p + 1.0 V dc, V_REFL = 0 V, and D = FFh. The device achieves this performance while delivering ±3 V output swing and maintaining <0.01% THD at 1 kHz - making DAC8841FP suitable for high-fidelity ac signal conditioning in test equipment and communications systems.

Does DAC8841FP support true bipolar output operation?

No, DAC8841FP is a 2-quadrant multiplying DAC and does not support true bipolar (±V) output. Its output range is 0 V to +3 V when V_REFL = 0 V and V_INX = +1.5 V. For full 4-quadrant operation with ±3 V output swing, Analog Devices specifies the DAC-8840, which operates from dual ±5 V supplies. DAC8841FP preserves input signal polarity and scales amplitude between 0× and 2×, but cannot generate negative output voltages relative to ground.

How does the preset (PR) pin function on DAC8841FP?

The PR pin on DAC8841FP is an active-low asynchronous input that forces all eight DAC registers to the midscale code 80h (decimal 128), resulting in all outputs equaling V_INX (half-scale). This occurs independently of clock or serial data activity and can be asserted at any time - during power-up, fault recovery, or system reinitialization. The action is immediate and hardware-based, eliminating software delays. DAC8841FP's PR functionality is confirmed in the functional block diagram, timing diagrams, and electrical specifications table under "Preset Pulse Width" (t_PR = 50 ns min).

Can multiple DAC8841FP devices be connected in series using the SDO pin?

Yes, DAC8841FP supports daisy-chained configuration via its SDO (serial data output) pin. Data loaded into the first DAC8841FP's 12-bit shift register appears at its SDO pin 12 clock cycles later, allowing direct connection to the SDI pin of the next device. This eliminates the need for external address decoders or additional MCU GPIOs. The feature is explicitly documented in the "CIRCUIT OPERATION" section and Figure 21 ("Three-Wire Interface"), confirming seamless cascading of multiple DAC8841FP units using only CLK, SDI, and LD shared across the chain.

What is the guaranteed linearity performance of DAC8841FP across temperature?

DAC8841FP guarantees integral nonlinearity (INL) of ±1/2 LSB and differential nonlinearity (DNL) of ±1 LSB over the full operating temperature range of –40°C to +85°C. This specification applies to all eight DACs (A–H) and excludes codes 0–7 due to output saturation near ground - linearity is measured from code 8 to 255. Temperature drift of half-scale output voltage is specified as ±1.5 µV/°C, and Figure 3 ("Linearity Error vs. Digital Code vs. Temperature") confirms stable performance across –55°C to +125°C for military-grade variants, validating robustness in industrial environments.