Analog Devices Inc. AD4116BCPZ-RL7

Overview

AD4116BCPZ-RL7 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, on-chip 2.5 V reference (±0.12% initial accuracy), and 1.25 SPS to 62.5 kSPS output data rate. It targets high-precision industrial voltage monitoring in PLC analog input modules.

For engineers reviewing the AD4116BCPZ-RL7 datasheet, AD4116BCPZ-RL7 pinout, AD4116BCPZ-RL7 application, or AD4116BCPZ-RL7 equivalent, key selection factors include its buffered rail-to-rail input architecture, simultaneous 50/60 Hz rejection at 20 SPS, sinc5+sinc1 filter settling (80 µs), and 40-lead 6 mm × 6 mm LFCSP package with AVDD/IOVDD dual-supply operation.

Technical Context

The AD4116BCPZ-RL7 implements a multi-stage sigma-delta modulator with programmable digital filters (sinc3, sinc5+sinc1), enabling channel scan rates up to 12,422 SPS per channel. Its analog front end includes true rail-to-rail input buffers, precision voltage divider network, and configurable low-level direct ADC inputs (ADCIN11–ADCIN15) for ±VREF ranges.

Digital interface supports SPI/QSPI/MICROWIRE/DSP protocols with Schmitt-triggered SCLK, DOUT/RDY dual-function pin, and CRC checksum protection. Internal 4 MHz master clock or external crystal (14–16.384 MHz) drives timing, while GPIO0/GPIO1/GPO2/GPO3 provide synchronization and error signaling across multi-ADC systems.

Key Specifications

Pinout & Package

The AD4116BCPZ-RL7 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).

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-RL7 uniquely integrates ≥10 MΩ ±10 V inputs, on-chip 2.5 V reference, and simultaneous 50/60 Hz rejection - making it optimal for cost-sensitive, space-constrained industrial voltage monitoring without external support circuitry.

Availability

AD4116BCPZ-RL7 is available at Aetrix Electronics and suitable for process control systems, PLC analog input modules, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AD4116BCPZ-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 Wilmington, MA.

The AD4116BCPZ-RL7 belongs to Analog Devices' precision sigma-delta ADC product line, designed specifically for industrial process automation, programmable logic controllers, and test & measurement equipment demanding robust noise immunity and wide input voltage range.

FAQ

What is the absolute maximum input voltage rating for AD4116BCPZ-RL7?

The AD4116BCPZ-RL7 has an absolute input pin voltage rating of ±20 V with respect to AVSS, and a functional differential input range of ±10 V. The pin absolute maximum rating is ±65 V - exceeding this risks permanent damage. These limits apply regardless of whether input buffers are enabled or disabled, and must be respected even during power-up/power-down sequences.

Does AD4116BCPZ-RL7 support external crystal oscillators?

Yes, the AD4116BCPZ-RL7 supports external crystals from 14 MHz to 16.384 MHz on XTAL1/XTAL2 pins, with typical start-up time of 10 µs. It also accepts external CMOS clock signals (4–4.096 MHz) on CLKIO (Pin 13). The internal 4 MHz oscillator provides ±2.5% accuracy and eliminates BOM cost when timing precision is secondary to simplicity.

How many analog input channels can AD4116BCPZ-RL7 handle simultaneously?

The AD4116BCPZ-RL7 supports up to 16 enabled analog input channels at once - comprising any combination of the 11 single-ended (or 6 differential) VINx inputs and the 5 low-level ADCINx inputs. Each channel has independent configuration registers for ODR, filter type, gain, and offset calibration, managed by the automatic channel sequencer.

What is the purpose of the REGCAPA and REGCAPD pins on AD4116BCPZ-RL7?

REGCAPA (Pin 7) and REGCAPD (Pin 22) are analog and digital LDO regulator outputs requiring dedicated 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 power domains - improper decoupling causes increased noise, reference drift, and conversion errors in the AD4116BCPZ-RL7.

Can AD4116BCPZ-RL7 operate with split analog supplies?

Yes, the AD4116BCPZ-RL7 supports split-supply operation: AVDD = +2.5 V, AVSS = −2.5 V, IOVDD = 2–3.6 V, with VBIAS− tied to AVSS. This mode maintains full ±10 V input range while enabling bipolar signal acquisition in systems with negative rails. Total supply current remains 6.15 mA, and all specifications including INL and TUE are guaranteed across −40°C to +105°C.