Analog Devices Inc. AD4114BCPZ

Overview

AD4114BCPZ from Analog Devices is a 24-bit sigma-delta ADC with integrated analog front end (AFE), supporting up to 16 single-ended or 8 differential ±10 V inputs, 31.25 kSPS maximum output data rate, 17.3 noise-free bits at 1007 SPS, and on-chip 2.5 V reference with ±0.12% initial accuracy - deployed in high-precision industrial process monitoring systems.

For engineers reviewing the AD4114BCPZ datasheet, AD4114BCPZ pinout, AD4114BCPZ application, or AD4114BCPZ equivalent, key selection factors include its ±10 V input range, 120 dB 50/60 Hz rejection at 20 SPS, 1 MΩ input impedance, single-supply operation (AVDD = 3.0–5.5 V), and 40-lead LFCSP package with integrated temperature sensor and GPIOs.

Technical Context

The AD4114BCPZ implements a proprietary iPassives®-enhanced sigma-delta modulator with Sinc5+Sinc1 and Sinc3 digital filter options, enabling simultaneous 50 Hz and 60 Hz rejection at 27.27 SPS. Its automatic channel sequencer supports up to 16 configurable input channels with individual setup registers for gain, offset, and filter per channel.

It integrates dual LDOs (1.8 V analog/digital), rail-to-rail reference buffers, internal 2.5 V reference (±5 ppm/°C drift), and supports both crystal (16.384 MHz) and external clock inputs. The device operates across −40°C to +105°C with total current consumption of 3.9 mA (AVDD + IOVDD) in full operating mode.

Key Specifications

Pinout & Package

The AD4114BCPZ is housed in a 40-lead, 6 mm × 6 mm LFCSP package with exposed thermal pad soldered to AVSS. Pin functions are validated per Analog Devices' Rev. A datasheet (Page 10–11).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision multichannel ADC applications.

Compared with AD7177-2BRUZ and LTC2499CGN#PBF, the AD4114BCPZ uniquely combines ±10 V input capability, integrated 2.5 V reference, 120 dB power-line rejection, and per-channel configuration in a single 40-lead LFCSP - reducing system complexity and qualification effort for industrial PLC and DCS designs.

Availability

AD4114BCPZ is available at Aetrix Electronics and suitable for process control systems, programmable logic controller (PLC) modules, and precision instrumentation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD4114BCPZ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for industrial, automotive, and communications markets.

The AD4114BCPZ belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for high-channel-count, high-accuracy industrial data acquisition where ±10 V input range, integrated AFE, and robust EMI rejection are mandatory.

FAQ

What is the maximum channel scan rate of the AD4114BCPZ?

The AD4114BCPZ achieves a maximum channel scan rate of 6.21 kSPS per channel with full 161 µs settling time. This performance is enabled by its optimized sigma-delta modulator architecture and integrated AFE, allowing rapid switching between up to 16 configured input channels while maintaining specified noise and linearity. The AD4114BCPZ maintains this scan rate across its full operating temperature range of −40°C to +105°C without derating.

Does the AD4114BCPZ require an external reference voltage?

No, the AD4114BCPZ does not require an external reference voltage because it integrates a buffered 2.5 V bandgap reference with ±0.12% initial accuracy at 25°C and ±5 ppm/°C typical drift. Pin 6 (REFOUT) provides this reference for internal use and can drive external circuitry with up to ±10 mA load. An external reference may be used via REF+ and REF− pins if higher stability or custom voltage is needed, but the AD4114BCPZ operates fully functional with its internal reference.

How many analog input channels does the AD4114BCPZ support?

The AD4114BCPZ supports up to 16 single-ended or 8 fully differential analog input channels using VIN0 through VIN15. Each channel can be independently configured via dedicated setup registers for input range, gain, filter type, ODR, and reference source. The device's automatic channel sequencer manages switching between enabled channels, and all 16 inputs share the same ±10 V input range and ≥1 MΩ input impedance specification - confirmed in the AD4114BCPZ datasheet Table 1 and General Description section.

What digital interface protocols does the AD4114BCPZ support?

The AD4114BCPZ supports SPI, QSPI, MICROWIRE, and DSP-compatible serial interfaces using a 3-wire (CS, SCLK, DOUT/RDY) or 4-wire (CS, SCLK, DIN, DOUT/RDY) configuration. Its SCLK input includes a Schmitt trigger for noise immunity, and the DOUT/RDY pin serves dual roles: serial data output during register reads and active-low data-ready interrupt. CRC and checksum protection are implemented in hardware for register communication integrity - features explicitly documented in the AD4114BCPZ datasheet Sections 16 and 17.

What is the absolute maximum input voltage rating for the AD4114BCPZ?

The AD4114BCPZ has an absolute maximum input voltage rating of ±65 V on any VINx pin relative to AVSS, as specified in Table 3 (Absolute Maximum Ratings) of the datasheet. However, functional operation with guaranteed specifications is limited to ±10 V differential or single-ended input range. The device also specifies ±20 V absolute input pin voltage (at AVDD ≥ 4.75 V), providing robust overvoltage tolerance during transient events - a key reliability feature for industrial field-connected sensors interfaced to the AD4114BCPZ.