Analog Devices Inc. AD4115BCPZ-RL7

Overview

AD4115BCPZ-RL7 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, 125 kSPS maximum output data rate, 85 dB 50/60 Hz rejection at 20 SPS, and operation from −40°C to +105°C in industrial PLC and process control systems.

For engineers reviewing the AD4115BCPZ-RL7 datasheet, AD4115BCPZ-RL7 pinout, AD4115BCPZ-RL7 application, or AD4115BCPZ-RL7 equivalent, key selection factors include its ±10 V input range, on-chip 2.5 V reference (±0.12% initial accuracy), 1 MΩ input impedance, 24-bit no-missing-codes performance, and support for simultaneous 50/60 Hz rejection via configurable digital filters.

Technical Context

The AD4115BCPZ-RL7 implements a high-precision sigma-delta modulator with sinc5+sinc1 and sinc3 digital filter options, enabling programmable trade-offs between settling time (as fast as 40.25 µs per channel) and noise rejection. Its AFE includes rail-to-rail input buffers, internal 2.5 V reference with ±5 ppm/°C drift, and precision voltage divider for biasing.

It supports flexible digital interface modes (SPI/QSPI/MICROWIRE/DSP-compatible), 3- or 4-wire serial communication with Schmitt-triggered SCLK, and hardware synchronization (SYNC) for multi-device timing alignment. Channel sequencing, GPIO control, and internal temperature sensing are embedded for system-level integration.

Key Specifications

Pinout & Package

The AD4115BCPZ-RL7 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 ADS131M08IPBSR, the AD4115BCPZ-RL7 uniquely combines ±10 V direct input capability, integrated 2.5 V reference, 125 kSPS throughput, and 40-pin LFCSP packaging - making it the only option among the three qualified for high-channel-count, high-voltage industrial analog input modules without external signal conditioning.

Availability

AD4115BCPZ-RL7 is available at Aetrix Electronics and suitable for process control systems, PLC analog input modules, and distributed control system (DCS) field interfaces requiring stable component supply, long-term lifecycle assurance, and industrial temperature grade performance.

Supply support for AD4115BCPZ-RL7 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, with R&D and manufacturing operations worldwide.

The AD4115BCPZ-RL7 belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for industrial automation, process control, and test equipment demanding robust ±10 V input handling, integrated AFE, and seamless SPI interface integration.

FAQ

What is the maximum sample rate per channel for the AD4115BCPZ-RL7 in continuous scan mode?

The AD4115BCPZ-RL7 achieves a maximum channel scan data rate of 24,845 SPS per channel with 40.25 µs settling time when all enabled channels are sequentially acquired. This is measured under fully settled conditions with sinc5+sinc1 filter configuration and applies to both differential and single-ended input modes as specified in the Rev. A datasheet Table 1 and General Description section.

Does the AD4115BCPZ-RL7 require an external reference, or does it include an internal one?

The AD4115BCPZ-RL7 integrates a 2.5 V internal reference with ±0.12% initial accuracy at 25°C and ±5 ppm/°C typical drift, buffered and available at the REFOUT pin. External references (1 V to AVDD) may be used via REF+ and REF−, but the internal reference eliminates external component requirements for most industrial applications.

What is the absolute maximum voltage rating for analog input pins on the AD4115BCPZ-RL7?

The AD4115BCPZ-RL7 specifies an absolute maximum rating of ±65 V on all VINx pins relative to AVSS, as confirmed in Table 3 (Absolute Maximum Ratings) of the Rev. A datasheet. This robust rating enables direct connection to industrial field wiring without additional overvoltage protection circuitry in many cases.

Can the AD4115BCPZ-RL7 operate with separate analog and digital supplies?

Yes - the AD4115BCPZ-RL7 features independent AVDD (4.5 V to 5.5 V, analog supply) and IOVDD (2 V to 5.5 V, digital I/O supply) rails. This allows galvanic isolation between analog and digital domains, supports mixed-voltage systems (e.g., 5 V AVDD with 3.3 V IOVDD), and minimizes noise coupling in high-EMI environments.

How many general-purpose I/O pins does the AD4115BCPZ-RL7 provide, and what are their voltage references?

The AD4115BCPZ-RL7 provides four GPIO/GPO pins: GPIO0, GPIO1 (bidirectional), GPO2, and GPO3 (output-only), plus the multifunction ERROR pin. All are referenced to AVDD and AVSS (not IOVDD), enabling direct interfacing with analog-domain logic and external multiplexers without level shifters.