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The ADuC834 is a complete smart transducer front end, integrating two high resolution - ADCs, an 8-bit MCU, and program/data Flash/EE memory on a single chip. The two independent ADCs (primary and auxiliary) include a temperature sensor and a PGA (allowing direct measurement of low level signals).
High Resolution - ADCs
2 Independent ADCs (16-Bit and 24-Bit Resolution)
24-Bit No Missing Codes, Primary ADC
21-Bit rms (18.5-Bit p-p) Effective Resolution @ 20 Hz
Offset Drift 10 nV/C, Gain Drift 0.5 ppm/C
Memory
62 Kbytes On-Chip Flash/EE Program Memory
4 Kbytes On-Chip Flash/EE Data Memory
Flash/EE, 100 Year Retention, 100 Kcycles Endurance
3 Levels of Flash/EE Program Memory Security
In-Circuit Serial Download (No External Hardware)
High Speed User Download (5 Seconds)
2304 Bytes On-Chip Data RAM
8051-Based Core
8051 Compatible Instruction Set
32 kHz External Crystal
On-Chip Programmable PLL (12.58 MHz Max)
3 X 16-Bit Timer/Counte
26 Programmable I/O Lines
11 Interrupt Sources, Two Priority Levels
Dual Data Pointer, Extended 11-Bit Stack Pointer
On-Chip Peripherals
Internal Power on Reset Circuit
12-Bit Voltage Output DAC
Dual 16-Bit - DACs/PWMs
On-Chip Temperature Sensor
Dual Excitation Current Sources
Time Interval Counter (Wake-Up/RTC Timer)
UART, SPI®, and I2C® Serial I/O
High Speed Baud Rate Generator (Including 115,200) Watchdog Timer
(WDT)
Power Supply Monitor (PSM)
Power
Normal: 2.3 mA Max @ 3.6 V (Core CLK = 1.57 MHz)
Power-Down: 20 A Max with Wake-Up Timer Running
Specified for 3 V and 5 V Operation
Package and Temperature Range
52-Lead MQFP (14 mm 14 mm), –40C to +125C
56-Lead LFCSP (8 mm 8 mm), –40C to +85C
Intelligent Sensors
Weigh Scales
Portable Instrumentation, Battery-Powered Systems
4–20 mA Transmitters
Data Logging
Precision System Monitoring
| Attribute | Attribute Value |
|---|---|
| Manufacturer | Analog Devices |
| Product Category | Microcontrollers |
| Series | MicroConverter® ADuC8xx |
| Packaging | Tray |
| Unit-Weight | 0.017496 oz |
| Mounting-Style | SMD/SMT |
| Package-Case | 52-QFP |
| Operating-Temperature | -40°C ~ 125°C (TA) |
| Supplier-Device-Package | 52-MQFP (10x10) |
| Number-of-I-O | 34 I/O |
| Speed | 12.58MHz |
| EEPROM-Size | 4K x 8 |
| Core-Processor | 8052 |
| RAM-Size | 2.25K x 8 |
| Program Memory | FLASH |
| Peripherals | POR, PSM, PWM, Temp Sensor, WDT |
| Connectivity | EBI/EMI, I2C, SPI, UART/USART |
| Voltage-Supply-Vcc-Vdd | 2.7 V ~ 5.25 V |
| Core-Size | 8-Bit |
| Program-Memory-Size | 62KB (62K x 8) |
| Data-Converters | A/D 3x16b, 4x24b; D/A 1x12b |
| Oscillator-Type | Internal |
| Maximum Operating Temperature | + 125 C |
| Operating temperature range | - 40 C |
| Interface-Type | I2C/SPI/UART |
| Core | 8052 |
| Processor-Series | ADUC834 |
| Software Development Kit | EVAL-ADUC834QSZ |
| Data-Bus-Width | 8 bit |
| Supply-Voltage-Max | 3.6 V 5.25 V |
| Supply-Voltage-Min | 2.7 V 4.75 V |
| Package-Case | QFP-52 |
| Maximum-Clock-Frequency | 1 MHz |
| Number-of-ADC-Channels | 4 ADC Channels |
| Input/output | 34 I/O |
| Data-RAM-Size | 2304 B |
| Number-of-Timers-Counters | 3 Timer |
| ADC-Resolution | 24 bit |
| Manufacturer Part# | Description | Manufacturer | Compare |
| ADUC834BS Microcontrollers and Processors | 8-BIT, FLASH, 12.58 MHz, MICROCONTROLLER, PQFP52, 14 X 14 MM, MO-022-AC-1, MQFP-52 | Rochester Electronics LLC | ADUC834BSZ vs ADUC834BS |
