NA2204NBAE2S

Analog Front End (AFE) Overview

The NA2204NBAE2S is a CMOS-based Analog Front End (AFE) featuring a high-precision 24-bit Delta-Sigma ADC. It integrates two Programmable Gain Amplifiers (PGA1 and PGA2) providing up to 128x total gain, an internal 2.048V reference, and dual excitation current sources. The device supports unipolar (2.7V–5.5V) or bipolar analog supplies and operates from -40°C to +125°C. Key features include system calibration for offset/gain drift, 50Hz/60Hz rejection modes, CRC8 error detection, and SPI interface. It consumes 2.9mA in normal mode and offers low-power operation.

Analog Front End (AFE) Feature Summary

• 24-bit resolution with no missing codes and data rates up to 9.6ksps
• Dual PGA architecture (PGA1: x1–32, PGA2: x1–4) for up to 128x amplification
• Integrated 2.048V±20mV voltage reference and 1.2288MHz oscillator
• Two matched excitation current sources (0.1mA–1.0mA) with <1% matching error

Analog Front End (AFE) Applications

• Temperature controllers
• Pressure sensors
• Flowmeters
• PLC systems
• Digital panel meters

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'NBAE2S' corresponds to the QFN4040-24-NB package with Sn-2Bi plating and 1,000 pcs/reel quantity. Confirm RoHS compliance and halogen-free status as specified in the order information table. Ensure the grade 'S' meets the required operating temperature range of -40°C to +125°C for general-purpose applications.

Analog Front End (AFE) Selection Notes

Select this model over NA2202 or NA2203 when 24-bit resolution is required. Note that PGA1 cannot be used for single-ended inputs; only PGA2 is available for single-ended configurations (VIN1P/N through VIN4P/N). Ensure supply voltages remain within 2.7V–5.5V for both analog and digital domains. Consider low-power mode if current consumption reduction to ~0.9mA is necessary, accepting a 1/4 data rate reduction.

Analog Front End (AFE) Part Context

This component belongs to the NA2202/NA2203/NA2204 series of high-precision AFEs from Nisshinbo Micro Devices. While sharing identical pinouts, interfaces, and analog front-end structures, the NA2204 is distinguished by its 24-bit ADC resolution compared to the 16-bit (NA2202) and 20-bit (NA2203) variants. All three share the same QFN4040-24-NB package and feature set.

Analog Front End (AFE) Replacement Considerations

Direct functional substitutes within the same family are NA2202NBAE2S (16-bit) and NA2203NBAE2S (20-bit), provided lower resolution is acceptable. Verify that any replacement maintains the 24-bit requirement if precision is critical. No other manufacturer part numbers are confirmed as direct replacements in the provided documentation.