Analog Devices Inc. AD4116BCPZ

Overview

AD4116BCPZ from Analog Devices is a 24-bit sigma-delta ADC with integrated analog front end, supporting ±10 V differential or single-ended inputs (6 diff / 11 SE), ≥10 MΩ input impedance, and buffered low-level direct ADC inputs. It delivers 85 dB 50/60 Hz rejection at 20 SPS per channel and operates across −40°C to +105°C for industrial process control and PLC modules.

For engineers reviewing the AD4116BCPZ datasheet, AD4116BCPZ pinout, AD4116BCPZ application, or AD4116BCPZ equivalent, key selection criteria include its 12,422 SPS channel scan rate (sinc5+sinc1), on-chip 2.5 V reference (±0.12% initial accuracy), rail-to-rail input buffers, 40-lead LFCSP package, and SPI/QSPI/MICROWIRE-compatible 3-/4-wire interface.

Technical Context

The AD4116BCPZ implements a dual-stage sinc5 + sinc1 or sinc3 digital filter architecture enabling simultaneous 50 Hz and 60 Hz line frequency rejection at 27.27 SPS output data rate. Its analog front end integrates true rail-to-rail input buffers, precision voltage dividers, and configurable multiplexing for up to 16 channels - including 11 high-impedance voltage inputs and 4 low-level direct ADC inputs.

It supports both internal 4 MHz master clock and external crystal (14–16.384 MHz) or clock input, with independent AVDD (4.5–5.5 V) and IOVDD (2–5.5 V) supplies. The device features embedded iPassives® technology for precision matching, an internal temperature sensor (±2°C accuracy post-calibration), and four GPIOs (GPIO0/GPIO1/GPO2/GPO3) referenced to AVDD/AVSS.

Key Specifications

Pinout & Package

The AD4116BCPZ is housed in a 40-lead, 6 mm × 6 mm LFCSP package with exposed thermal pad soldered to AVSS. Pin 10 (DNC) must remain unconnected; Pin 7 (REGCAPA) and Pin 22 (REGCAPD) require dedicated decoupling capacitors (1 µF + 0.1 µF and 1 µF respectively).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7177-2BRUZ and ADS131M06IPBSR, the AD4116BCPZ uniquely combines ±10 V buffered inputs, ≥10 MΩ impedance, on-chip 2.5 V reference, and deterministic 80 µs settling-making it optimal for industrial analog input modules where signal integrity, layout simplicity, and temperature stability are critical.

Availability

AD4116BCPZ is available at Aetrix Electronics and suitable for process control systems, PLC analog input modules, and industrial data acquisition equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for AD4116BCPZ 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 Wilmington, MA.

The AD4116BCPZ belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for industrial automation, process instrumentation, and high-reliability measurement systems demanding robustness, accuracy, and integration.

FAQ

What is the maximum channel scan rate supported by the AD4116BCPZ?

The AD4116BCPZ achieves a maximum channel scan rate of 12,422 SPS per channel using the sinc5 + sinc1 filter (80 µs settling time) and 20,618 SPS per channel using the sinc3 filter (48 µs settling time). This performance is confirmed in the General Description section of the Rev. 0 datasheet and applies directly to the AD4116BCPZ under specified conditions with internal clock and full operating mode. Channel sequencing is fully automatic and configurable via register settings.

Does the AD4116BCPZ support true ±10 V differential input operation without external components?

Yes, the AD4116BCPZ supports true ±10 V differential input operation natively through its VINx pins (e.g., VIN0/VIN1, VIN2/VIN3, etc.) when configured in differential mode. Its integrated rail-to-rail input buffers and ≥10 MΩ input impedance eliminate the need for external op-amps or level shifters. The specification is guaranteed for ±10 V differential input voltage range, and absolute pin voltage limits (±20 V) provide margin against transients - all verified in Table 1 of the AD4116BCPZ datasheet.

Can the AD4116BCPZ operate with a split analog supply (e.g., AVDD = +2.5 V, AVSS = −2.5 V)?

Yes, the AD4116BCPZ supports split-supply operation with AVDD = +2.5 V and AVSS = −2.5 V, as explicitly defined in the Specifications section (page 4). In this configuration, IOVDD must be limited to 2–3.6 V, and VBIAS− must be tied to AVSS. All analog input specifications-including ±10 V differential range and ≥10 MΩ impedance-remain valid under split-supply conditions, enabling bipolar signal acquisition in isolated or dual-rail systems.

What is the role of the REGCAPA and REGCAPD pins on the AD4116BCPZ?

REGCAPA and REGCAPD are dedicated analog and digital LDO regulator output pins requiring external decoupling: REGCAPA needs a 1 µF + 0.1 µF capacitor to AVSS, and REGCAPD requires a 1 µF capacitor to DGND. These pins stabilize internal LDOs powering the analog and digital sections respectively. Leaving them un-decoupled risks increased noise, reference instability, and degraded INL/TUE performance - details confirmed in Pin Function Descriptions (Table 6, pages 10–11) of the AD4116BCPZ datasheet.

How does the AD4116BCPZ handle 50 Hz and 60 Hz interference in noisy industrial environments?

The AD4116BCPZ provides hardware-accelerated 50 Hz and 60 Hz rejection via its configurable digital filter: at 20 SPS output data rate, it achieves 85 dB rejection for both frequencies simultaneously using enhanced sinc5 + sinc1 or sinc3 filters. This capability is measured and specified in Table 1 (Normal Mode Rejection) and does not require external analog filters or software post-processing - making the AD4116BCPZ especially effective in PLC and process control applications with strong AC line coupling.