BH67F5362A - 24-bit Delta-Sigma A/D LCD Flash MCU | Holtek
Référence : BH67F5362A ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.65 | $16,50 |
| 100 | $1.42 | $142,00 |
| 500 | $1.2 | $600,00 |
| 1 000 | $1.05 | $1 050,00 |
BH67F5362A Présentation
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.
Alternatives de remplacement direct pour BH67F5362A — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec BH67F5362A (même facteur de forme et même empreinte) — différant par LCD Driver, Package, Program Memory.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
BH67F5372A
✅ Remplacement direct✓ En stock
$1.62 / unité
Voir la fiche technique →BH66F5362
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BH67F5262
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
BH67F5362A Valeurs maximales et caractéristiques électriques
| 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 |
| Boîtier | LQFP-64 (10 mm × 10 mm, 0.5 mm pitch) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de BH67F5362A
| Broche 1 | VDD — Power supply |
| Broche 2 | OSC1 — External high-speed crystal oscillator input |
| Broche 3 | OSC2 — External high-speed crystal oscillator output |
| Broche 4 | XTAL1 — External low-speed 32.768 kHz crystal input |
| Broche 5 | XTAL2 — External low-speed 32.768 kHz crystal output |
| Broche 6 | RESET — Reset input, active low |
| Broche 7 | VSS — Ground |
| Broche 8 | AVDD — Analog power supply |
| Broche 9 | AVSS — Analog ground |
| Broche 10 | VREF — ADC reference voltage |
| Broche 11 | AIN0+ — Differential ADC positive input |
| Broche 12 | AIN0- — Differential ADC negative input |
| Broche 13 | AIN1+ — Auxiliary ADC positive input |
| Broche 14 | AIN1- — Auxiliary ADC negative input |
| Broche 15 | PGAVSS — Programmable gain amplifier ground |
| Broche 16 | COM0 — LCD common line 0 |
| Broche 17 | COM1 — LCD common line 1 |
| Broche 18 | COM2 — LCD common line 2 |
| Broche 19 | COM3 — LCD common line 3 |
| Broche 20 | SEG0 — LCD segment 0 |
| Broche 21 | SEG1 — LCD segment 1 |
| Broche 22 | SEG2 — LCD segment 2 |
| Broche 23 | SEG3 — LCD segment 3 |
| Broche 24 | SEG4 — LCD segment 4 |
| Broche 25 | SEG5 — LCD segment 5 |
| Broche 26 | SEG6 — LCD segment 6 |
| Broche 27 | SEG7 — LCD segment 7 |
| Broche 28 | SEG8 — LCD segment 8 |
| Broche 29 | SEG9 — LCD segment 9 |
| Broche 30 | SEG10 — LCD segment 10 |
| Broche 31 | SEG11 — LCD segment 11 |
| Broche 32 | SEG12 — LCD segment 12 |
| Broche 33 | SEG13 — LCD segment 13 |
| Broche 34 | SEG14 — LCD segment 14 |
| Broche 35 | SEG15 — LCD segment 15 |
| Broche 36 | SEG16 — LCD segment 16 |
| Broche 37 | SEG17 — LCD segment 17 |
| Broche 38 | SEG18 — LCD segment 18 |
| Broche 39 | SEG19 — LCD segment 19 |
| Broche 40 | SEG20 — LCD segment 20 |
| Broche 41 | SEG21 — LCD segment 21 |
| Broche 42 | SEG22 — LCD segment 22 |
| Broche 43 | SEG23 — LCD segment 23 |
| Broche 44 | SEG24 — LCD segment 24 |
| Broche 45 | SEG25 — LCD segment 25 |
| Broche 46 | SEG26 — LCD segment 26 |
| Broche 47 | SEG27 — LCD segment 27 |
| Broche 48 | SEG28 — LCD segment 28 |
| Broche 49 | SEG29 — LCD segment 29 |
| Broche 50 | SEG30 — LCD segment 30 |
| Broche 51 | SEG31 — LCD segment 31 |
| Broche 52 | PA0 — GPIO / peripheral pin |
| Broche 53 | PA1 — GPIO / peripheral pin |
| Broche 54 | PA2 — GPIO / peripheral pin |
| Broche 55 | PA3 — GPIO / peripheral pin |
| Broche 56 | PB0 — GPIO / peripheral pin |
| Broche 57 | PB1 — GPIO / peripheral pin |
| Broche 58 | PB2 — GPIO / peripheral pin |
| Broche 59 | PB3 — GPIO / peripheral pin |
| Broche 60 | PC0 — GPIO / peripheral pin |
| Broche 61 | PC1 — GPIO / peripheral pin |
| Broche 62 | PC2 — GPIO / peripheral pin |
| Broche 63 | PC3 — GPIO / peripheral pin |
| Broche 64 | VSS — Ground |
Applications typiques
BH67F5362A convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour BH67F5362A — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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) |
Principaux différenciateurs
- Integrated 24-bit Delta-Sigma ADC removes external analog front end (vs BH66F5362)
- Cost-optimized within Holtek 24-bit A/D LCD MCU family (vs BH67F5372A)
- True on-chip EEPROM for calibration data retention (vs BH67F5262)
Notes de conception
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.
Informations de conformité
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.
