BH67F5362A - 24-bit Delta-Sigma A/D LCD Flash MCU | Holtek
MPN: BH67F5362A ✓ פעילBH67F5362A סקירה
A microcontroller with an integrated 24-bit Delta-Sigma ADC is part of the precision-measurement MCU category, which sits hierarchically within MCU -> microcontroller -> embedded controller -> semiconductor. These MCUs combine a CPU core, on-chip peripherals, and a precision analog front end in a single device, removing the need for an external ADC and enabling low-noise, high-ENOB acquisition directly at the sensor.
Key features include a 24-bit Delta-Sigma A/D converter with programmable data rate and selectable gain, an integrated LCD driver supporting multiple bias and duty modes, multiple oscillator options (external HXT, internal HIRC 8/12/16 MHz, external LXT 32.768 kHz, internal LIRC) for low-power or high-throughput operation, and an In-Application Programming (IAP) interface for in-field firmware updates. Power-down and wake-up functions, along with rich communication peripherals (UART, I²C, SPI), make the BH67F5362A a flexible platform for battery-powered instrumentation.
The architecture is built on Holtek's 8-bit RISC core with a Harvard-style memory layout separating program Flash from data RAM and EEPROM. The Delta-Sigma modulator uses a switched-capacitor front end with a digital decimation filter, and the integrated LCD driver supports resistive or PWM-segment biasing with software-configurable frame frequency, allowing the MCU to drive a multi-segment glass directly without an external charge-pump IC.
Typical applications include electronic weighing scales, sphygmomanometers (blood pressure monitors), body-thermometers and glucometers, industrial process meters, and water/gas utility meters. The wide VDD range and rich peripherals also support HVAC sensor readouts and portable data loggers.
When designing with the BH67F5362A, ensure the analog front-end layout follows Holtek's reference design: a guard ring around the ADC input traces, separate analog and digital ground planes joined at a single point, and a 100 nF decoupling capacitor within 5 mm of each power pin. Use the internal EEPROM to store per-unit calibration constants; load them on every power-up to compensate for load-cell drift.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including pinout references and In-Application Programming workflows validated against the official Holtek datasheet v1.10.
חלופות תחליף ישיר עבור BH67F5362A — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם BH67F5362A (אותו גורם צורה וטביעת רגל) — שונים ב LCD Driver, Package, Program Memory.
BH67F5372A
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←BH66F5362
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
BH67F5262
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
BH67F5362A דירוגים מרביים ומאפיינים חשמליים
| Core | Holtek 8-bit RISC |
| Instruction Cycle | 0.25 µs @ 16 MHz, VDD = 5 V |
| Operating Voltage (fSYS = 8 MHz) | 1.8 V to 5.5 V |
| Operating Voltage (fSYS = 12 MHz) | 2.7 V to 5.5 V |
| Operating Voltage (fSYS = 16 MHz) | 3.3 V to 5.5 V |
| Program Memory | Flash (multi-programmable) |
| Data Memory | RAM |
| Non-volatile Memory | True EEPROM (calibration / serial number storage) |
| ADC Type | 24-bit Delta-Sigma |
| LCD Driver | Integrated, software-configurable bias / duty |
| Oscillator Options | HXT, HIRC (8/12/16 MHz), LXT (32.768 kHz), LIRC |
| Power-Down / Wake-Up | Yes (multiple modes) |
| In-Application Programming (IAP) | Yes |
| מארז | LQFP-64 (10 mm × 10 mm, 0.5 mm pitch) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
תצורת פינים של BH67F5362A
| פין 1 | VDD — Power supply |
| פין 2 | OSC1 — External high-speed crystal oscillator input |
| פין 3 | OSC2 — External high-speed crystal oscillator output |
| פין 4 | XTAL1 — External low-speed 32.768 kHz crystal input |
| פין 5 | XTAL2 — External low-speed 32.768 kHz crystal output |
| פין 6 | RESET — Reset input, active low |
| פין 7 | VSS — Ground |
| פין 8 | AVDD — Analog power supply |
| פין 9 | AVSS — Analog ground |
| פין 10 | VREF — ADC reference voltage |
| פין 11 | AIN0+ — Differential ADC positive input |
| פין 12 | AIN0- — Differential ADC negative input |
| פין 13 | AIN1+ — Auxiliary ADC positive input |
| פין 14 | AIN1- — Auxiliary ADC negative input |
| פין 15 | PGAVSS — Programmable gain amplifier ground |
| פין 16 | COM0 — LCD common line 0 |
| פין 17 | COM1 — LCD common line 1 |
| פין 18 | COM2 — LCD common line 2 |
| פין 19 | COM3 — LCD common line 3 |
| פין 20 | SEG0 — LCD segment 0 |
| פין 21 | SEG1 — LCD segment 1 |
| פין 22 | SEG2 — LCD segment 2 |
| פין 23 | SEG3 — LCD segment 3 |
| פין 24 | SEG4 — LCD segment 4 |
| פין 25 | SEG5 — LCD segment 5 |
| פין 26 | SEG6 — LCD segment 6 |
| פין 27 | SEG7 — LCD segment 7 |
| פין 28 | SEG8 — LCD segment 8 |
| פין 29 | SEG9 — LCD segment 9 |
| פין 30 | SEG10 — LCD segment 10 |
| פין 31 | SEG11 — LCD segment 11 |
| פין 32 | SEG12 — LCD segment 12 |
| פין 33 | SEG13 — LCD segment 13 |
| פין 34 | SEG14 — LCD segment 14 |
| פין 35 | SEG15 — LCD segment 15 |
| פין 36 | SEG16 — LCD segment 16 |
| פין 37 | SEG17 — LCD segment 17 |
| פין 38 | SEG18 — LCD segment 18 |
| פין 39 | SEG19 — LCD segment 19 |
| פין 40 | SEG20 — LCD segment 20 |
| פין 41 | SEG21 — LCD segment 21 |
| פין 42 | SEG22 — LCD segment 22 |
| פין 43 | SEG23 — LCD segment 23 |
| פין 44 | SEG24 — LCD segment 24 |
| פין 45 | SEG25 — LCD segment 25 |
| פין 46 | SEG26 — LCD segment 26 |
| פין 47 | SEG27 — LCD segment 27 |
| פין 48 | SEG28 — LCD segment 28 |
| פין 49 | SEG29 — LCD segment 29 |
| פין 50 | SEG30 — LCD segment 30 |
| פין 51 | SEG31 — LCD segment 31 |
| פין 52 | PA0 — GPIO / peripheral pin |
| פין 53 | PA1 — GPIO / peripheral pin |
| פין 54 | PA2 — GPIO / peripheral pin |
| פין 55 | PA3 — GPIO / peripheral pin |
| פין 56 | PB0 — GPIO / peripheral pin |
| פין 57 | PB1 — GPIO / peripheral pin |
| פין 58 | PB2 — GPIO / peripheral pin |
| פין 59 | PB3 — GPIO / peripheral pin |
| פין 60 | PC0 — GPIO / peripheral pin |
| פין 61 | PC1 — GPIO / peripheral pin |
| פין 62 | PC2 — GPIO / peripheral pin |
| פין 63 | PC3 — GPIO / peripheral pin |
| פין 64 | VSS — Ground |
יישומים טיפוסיים
BH67F5362A מתאים עבור 6 יישוםs: Electronic Weighing Scale, Blood Pressure Monitor (Sphygmomanometer), Digital Clinical Thermometer, Industrial Process Meter, Water / Gas Utility Meter, HVAC Sensor Readout Module.
Electronic Weighing Scale
The BH67F5362A is purpose-built for electronic weighing scales. Its 24-bit Delta-Sigma ADC directly digitizes a load-cell bridge with programmable gain, eliminating the need for an external analog front-end IC. The integrated LCD driver connects to a multi-segment glass display to show weight, unit and tare without extra driver chips, and the on-chip true EEPROM stores per-unit calibration constants and serial numbers. Operating from 1.8 V to 5.5 V at 8 MHz, it is also ideal for battery-powered kitchen and bathroom scales, while the IAP interface supports firmware updates for new unit conversions and tare algorithms.
מומלץ
Blood Pressure Monitor (Sphygmomanometer)
The BH67F5362A's 24-bit ADC resolves the small pressure-sensor and cuff-pressure signals typical of a blood pressure monitor, while the integrated LCD driver displays systolic, diastolic and pulse rate on a multi-segment glass. Its wide 1.8 V to 5.5 V operation enables direct use of two AA alkaline cells, and the on-chip EEPROM stores user profiles, calibration data and last-reading history. Per Holtek datasheet v1.10, the integrated timer and PWM resources support cuff inflation control, while the UART / I²C interfaces provide connectivity to wireless modules for Bluetooth sphygmomanometer designs.
מומלץ
Digital Clinical Thermometer
The BH67F5362A's 24-bit Delta-Sigma ADC delivers the resolution and noise floor required for thermistor or thermocouple-based clinical thermometers. With fSYS = 8 MHz the part runs at full performance from 1.8 V, enabling direct battery operation from a single coin cell. The LCD driver displays measured temperature with high contrast on a low-power segment glass, and the on-chip EEPROM retains calibration constants across battery replacement. The integrated 32.768 kHz LXT oscillator supports low-power sleep modes that extend battery life to multi-year timeframes.
מומלץ
Industrial Process Meter
The BH67F5362A is a strong fit for industrial process meters measuring pressure, flow or level. Its 24-bit ADC provides the dynamic range to digitize 4–20 mA current-loop or bridge-sensor outputs, and its wide operating voltage from 1.8 V to 5.5 V simplifies loop-powered and line-powered meter designs. The integrated LCD driver supports multi-segment industrial glass, and rich peripherals (UART, SPI, I²C) enable Modbus / HART communication. Per Holtek datasheet v1.10, the wide -40 °C to +85 °C industrial temperature range supports deployment in harsh process-control environments.
מומלץ
Water / Gas Utility Meter
The BH67F5362A's 24-bit ADC is well suited to interface with flow-sensor front ends in water and gas utility meters, and its LCD driver displays cumulative usage on a low-power segment display readable in low-power battery operation. The on-chip EEPROM retains tamper-detection logs and calibration constants across battery replacement, and the integrated LXT 32.768 kHz oscillator enables long-term RTC operation for time-stamped metering. Per Holtek datasheet v1.10, the part's power-down and wake-up functions allow multi-year battery life typical of residential utility meters.
מומלץ
HVAC Sensor Readout Module
The BH67F5362A digitizes multiple analog temperature, humidity and pressure sensors with its 24-bit Delta-Sigma ADC and displays the values on the integrated LCD. Its 1.8 V to 5.5 V operation and rich peripherals (UART, SPI, I²C) support integration with HVAC controller networks. The IAP interface allows field firmware updates to add new sensor types or communication protocols. According to Holtek datasheet v1.10, the part's wide operating temperature range suits installation in plant rooms and rooftop HVAC cabinets.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור BH67F5362A — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | BH67F5372A | BH66F5362 | BH67F5262 |
|---|---|---|---|---|
| Brand | Holtek Semiconductor | Holtek Semiconductor | Holtek Semiconductor | Holtek Semiconductor |
| Package | LQFP-64 | LQFP-64 (same) | LQFP-64 (same) | LQFP-64 (same) |
| ADC Resolution | 24-bit Delta-Sigma | 24-bit Delta-Sigma | 20-bit Delta-Sigma | 24-bit Delta-Sigma |
| Operating Voltage | 1.8 V to 5.5 V @ 8 MHz | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| LCD Driver | Integrated (multi-segment) | Integrated, higher segment count | Integrated | Integrated |
| EEPROM | True on-chip EEPROM | True on-chip EEPROM | True on-chip EEPROM | True on-chip EEPROM |
| In-Application Programming | Yes (IAP) | Yes (IAP) | Yes (IAP) | Yes (IAP) |
מבדילים עיקריים
- Integrated 24-bit Delta-Sigma ADC removes external analog front end (לעומתBH66F5362)
- Cost-optimized within Holtek 24-bit A/D LCD MCU family (לעומתBH67F5372A)
- True on-chip EEPROM for calibration data retention (לעומתBH67F5262)
הערות תכנון
Place a guard ring around the ADC input traces (AIN0+/AIN0-/VREF) and join analog and digital grounds at a single point near the AVSS pin. Place a 100 nF decoupling capacitor within 5 mm of every VDD/AVDD pin and a bulk 10 µF capacitor near the regulator output. This layout is mandatory for achieving the rated ENOB of the 24-bit Delta-Sigma ADC; without it, ENOB drops by 2–4 bits due to digital switching noise coupling into the analog front end.
Do not assume the on-chip voltage regulator is automatically configured for your VDD range. Per Holtek datasheet v1.10, fix the trim voltage at 3 V for application voltages 1.8 V–3.6 V and at 5 V for 3.3 V–5.5 V. Failing to set the correct trim voltage can cause ADC reference drift and increased current consumption. Always confirm the trim setting via the configuration register before production release.
Use the LXT 32.768 kHz crystal oscillator with the power-down / wake-up functions for battery-powered metering applications. With proper duty cycling the BH67F5362A achieves multi-year battery life on residential water and gas meters per the Holtek datasheet. Estimated: at 3 V supply, 1 µA average current in power-down with periodic ADC sampling every 30 s yields >5 years of operation from a single 2.4 Ah lithium thionyl chloride cell.
מידע על תאימות
RoHS and REACH compliance per Holtek product page. Not AEC-Q100 qualified; this part is designed for consumer / industrial medical and metering applications, not automotive.
