Renesas R5F11NLFAFB#30

Overview

R5F11NLFAFB#30 from Renesas is a 64-pin LFQFP RL78/H1D microcontroller featuring a 24-bit ΔΣ A/D converter with programmable gain instrumentation amplifier (PGA0), dual operational amplifiers (AMP0, AMP1), 12-bit D/A converter (DAC1), integrated LCD controller/driver (32 segments × 8 commons), and true low-power operation (0.68 μA in Halt mode). It delivers 33 DMIPS at 24 MHz and targets precision analog-sensing applications in healthcare and flow metering.

For engineers reviewing the R5F11NLFAFB#30 datasheet, R5F11NLFAFB#30 pinout, R5F11NLFAFB#30 application, or R5F11NLFAFB#30 equivalent, this device offers confirmed support for 24-bit ΔΣ ADC with SNDR of 85 dB (TYP.), programmable PGA gain (×1 to ×64), rail-to-rail op-amp output swing, 12-bit DAC linearity ±1 LSB, and real-time clock 2 with calendar function - all within a single-chip AFE+MCU solution.

Technical Context

The R5F11NLFAFB#30 integrates an analog front-end (AFE) with dedicated power domains: AVDD/AVSS for analog circuitry, REGA LDO for internal analog bias, and SBIAS (0.5–2.2 V) for sensor excitation. Its 24-bit ΔΣ A/D converter operates in normal mode (488 sps–15.625 ksps) and low-power mode (61 sps–1.953 ksps), with PGA0 supporting differential or single-ended inputs across 1–5 channels.

It implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and hardware multiply/divide/accumulate instructions. Peripheral integration includes Timer Array Unit (TAU) with 8 channels, 4-channel I²C, 3-channel UART (LIN-capable), 3-channel CSI/SPI, and Event Link Controller (ELC) enabling direct peripheral-to-peripheral event triggering without CPU intervention.

Key Specifications

Pinout & Package

Package: 64-pin plastic LFQFP (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, operating ambient temperature −40 to +85°C (Consumer grade A).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal microcontroller applications.

Compared with R5F11NLFAFB#30, R5F11PLFAFB#30 offers identical analog performance in a smaller package but requires TFBGA handling capability, while R5F11NGFAFB#30 retains full AFE capability in a lower-pin-count, lower-cost package - making it ideal for scaled-down product variants without sacrificing measurement fidelity.

Availability

R5F11NLFAFB#30 is available at Aetrix Electronics and suitable for healthcare instrumentation, industrial flow metering, and portable diagnostic equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F11NLFAFB#30 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

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RL78/H1D product line is designed specifically for ultra-low-power, high-precision analog-sensing applications - integrating 24-bit ΔΣ ADCs, programmable PGAs, op-amps, and LCD drivers into a single MCU for medical and metering systems.

FAQ

What is the maximum sampling rate of the 24-bit ΔΣ A/D converter in R5F11NLFAFB#30?

The 24-bit ΔΣ A/D converter in R5F11NLFAFB#30 achieves a maximum output data rate of 15.625 ksps in normal mode and 1.953 ksps in low-power mode. These rates are confirmed in the R01DS0318EJ0111 datasheet Section 1.1 under "24-bit ΔΣ A/D converter" specifications, and apply directly to the R5F11NLFAFB#30 variant.

Does R5F11NLFAFB#30 support simultaneous operation of its 12-bit DAC and 24-bit ΔΣ ADC?

Yes, R5F11NLFAFB#30 supports concurrent operation of DAC1 (12-bit) and the 24-bit ΔΣ ADC. The analog subsystem uses independent power domains (AVDD/AVSS) and dedicated internal routing, allowing real-time closed-loop control - for example, generating a reference voltage via DAC1 while measuring sensor response via ΔΣ ADC - without resource conflict.

What LCD configuration does R5F11NLFAFB#30 support, and how many segments can it drive?

R5F11NLFAFB#30 supports LCD configurations up to 32 segment outputs and 8 common outputs (256 segments total), with selectable drive methods including internal voltage boosting and capacitor-split. This is confirmed in Section 1.1 ("LCD controller/driver") and Figure 1-1 of the R01DS0318EJ0111 datasheet for the R5F11NL family.

Is the SBIAS output on R5F11NLFAFB#30 programmable, and what is its voltage range?

Yes, the SBIAS output on R5F11NLFAFB#30 is digitally programmable from 0.5 V to 2.2 V in 0.1 V steps. It is designed to bias resistive sensors (e.g., strain gauges, RTDs) and is explicitly documented in Section 1.1 ("Analog front-end power supply circuit") of the R01DS0318EJ0111 datasheet for R5F11N/R5F11P variants, which includes R5F11NLFAFB#30.

What are the key power modes supported by R5F11NLFAFB#30, and what is its lowest active current?

R5F11NLFAFB#30 supports HALT, STOP, and SNOOZE modes. Its lowest active current is 70.8 μA/MHz in normal operation, and its lowest retention mode current is 0.68 μA in HALT mode with RTC2 and LVD enabled - verified in Section 1.1 ("Ultra-low power consumption technology") of the R01DS0318EJ0111 datasheet.