MAX7651资料

MAX7651/MAX7652
o DC to 12MHz Clock Speed o 64-Pin TQFP Package
Ordering Information
PART MAX7651CCB MAX7651ECB MAX7652CCB MAX7652ECB TEMP. RANGE 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C PIN-PACKAGE 64 TQFP 64 TQFP 64 TQFP 64 TQFP
Features
o 12-Bit 53ksps ADC with Fully Differential Inputs o Dual 8-Bit PWM DAC Outputs o Three Timers o 4-Clock Cycle 8051-Compatible Instruction Set with Dual Data Pointers o o o o Programmable Watchdog Supervisor Four Parallel I/O Ports Dual Serial I/O Ports (up to 375kb) +3V or +5V Single-Supply Operation
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .
FOUR 8-BIT I/O PORTS
256 BYTES RAM
EXT MEM SFR BUS MEMORY ADDRESS AND DATA BUSES INTERRUPT CONTROLLER AIN0 12-BIT A/D CONVERTER ANALOG INPUTS AIN7 REF+ REFACOM INT0 INT1
WATCHDOG TIMER
SERIAL PORT 0
SERIAL PORT 1
TIMER 0 TIMER 1 TIMER 2 TATOR
TXD
RXD TXD
RXD
T0 T1 T2 T2_OUT
PWMA PWMB OUTPUT OUTPUT
________________________________________________________________ Maxim Integrated Products
元器件交易网
19-2119; Rev 0; 8/01
Flash Programmable 12-Bit Integrated Data-Acquisition Systems
General Description
The MAX7651/MAX7652 are complete 12-bit data-acquisition systems featuring an algorithmic, switched-capacitor, analog-to-digital converter (ADC), a pulsewidth-modulated digital-to-analog converter (DAC), three timer/counters, and an industry-standard 8051 microprocessor core with a variety of I/O peripherals. Powerdown capability and full functionality with supply voltages as low as +3V make the MAX7651/MAX7652 suitable for portable and power-sensitive applications. The MAX7651/MAX7652 perform fully differential voltage measurements with 12-bit resolution, programmable gain, and separate track-and-hold for both positive and negative inputs. The converter accepts versatile input modes consisting of four 2-channel signal pairs or eight 1-channel signals relative to a floating common. The MAX7651/MAX7652 microprocessor systems feature a CPU, 256 bytes of RAM, two 8kB flash memory, four 8-bit I/O ports, two UARTs, an interrupt controller, and a watchdog timer. Only four clock cycles are required to complete each microprocessor instruction. The MAX7651/MAX7652 are available in 64-pin TQFP packages.
Applications
Hand-Held Instruments Portable Data-Acquisition Systems Temperature Controllers Smart Transmitters Data Loggers Multi-Channel Data-Acquisition with Data Formatting
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Pin configuration appears at end of data sheet.
Functional Diagram
UPPER 8k BYTE FLASH 2000H– 3FCOH LOWER 8k BYTE FLASH 0000H– 1FFFH 8051 CPU
MAX7651 MAX7652
ELECTRICAL CHARACTERISTICS
(MAX7651 AVDD = VPWMV = DVDD = VREF+ = +4.5V to +5.5V, VREF- = 0, fXTAL = 12MHz. MAX7652 AVDD = VPWMV = DVDD = +2.7V to +3.6V, VREF+ = +2.5V, VREF- = 0, ACOM = AVDD/2, fXTAL = 12MHz. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
元器件交易网
Flash Programmable 12-Bit Integrated Data-Acquisition Systems MAX7651/MAX7652
ABSOLUTE MAXIMUM RATINGS
AVDD, PWMV, DVDD to AGND_ ..............................-0.3V to +6V AVDD, DVDD to DGND..............................................-0.3V to +6V AVDD to DVDD .......................................................-0.3V to +0.3V AGND, PWMG to DGND .......................................-0.3V to +0.3V Analog Inputs (AIN_, ACOM, XTAL1, XTAL2) to AGND................................................-0.3V to AVDD_ + 0.3V Analog Outputs (PWMA, PWMB) to AGND_..............................................-0.3V to AVDD_ + 0.3V Digital I/O (A_, AD_, ALE/PROG, EA/VPP, INT0, INT1, P_._, PSEN, RST) to DGND ..........-0.3V to DVDD + 0.3V REF+, REF- to AGND_ ..............................-0.3V to AVDD_ + 0.3V Short-Circuit Duration (PWM_, P_._, ALE/PROG, PSEN)..........1s Continuous Power Dissipation (TA = +70°C) 64-Pin TQFP (derate 5.00mW/°C above +70°C).........500mW Operating Temperature Range MAX765_CCB ....................................................0°C to +70°C MAX765_ECB .................................................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER DC ACCURACY Resolution RES Differential Relative Accuracy (Note 1) INL Single-ended Differential Nonlinearity (Note2) Offset Error (Note 2) Offset Temperature Coefficient Gain Error (Note 2) Gain Temperature Coefficient Channel-to-Channel Matching (Note 2) Offset and gain ±3 ±0.25 DNL Differential Single-ended MAX7651 MAX7652 MAX7651 MAX7652 ±0.5 ±0.5 ±2.3 ±0.25 3 12 ±1.5 ±1.0 ±4.0 ±1.5 ±1 ±1 ±7 LSB LSB LSB/°C % ppm/°C LSB LSB bits SYMBOL CONDITIONS MIN TYP MAX UNITS