الصفحة الرئيسية > الدوائر المتكاملة الدوائر المتكاملة > الدوائر المتكاملة الخطية التناظرية > MCP4812T-E/SN

MCP4812T-E/SN

Dual 10-bit DAC, 2.048V Int Ref, SPI 20MHz, 4.5us, AEC-Q100, SOIC-8

7421

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جزء الشركة المصنعة ： جزء الشركة المصنعة

MCP4812T-E/SN

الحزمة ： الحزمة

SOIC-8 (4.9 x 3.9 x 1.75 mm)

الوصف

نظرة عامة على المنتج

The MCP4812T-E/SN from Microchip Technology is a dual-channel 10-bit voltage output DAC with internal 2.048V reference, SPI interface, and 4.5 us settling time in an SOIC-8 package. AEC-Q100 Grade 1 qualified.

المواصفات الرئيسية

النوع	Dual 10-bit Voltage Output DAC
Resolution	10-bit
القنوات	2
Internal Reference	2.048 V
Output Range	0 V to 2.048 V (1x gain) or 0 V to 4.096 V (2x gain)
Settling Time	4.5 us typical
INL	±0.5 LSB (typical)
DNL	±0.1 LSB (typical)
جهد الإمداد	2.7 V to 5.5 V
Supply Current	415 uA (typical)
الواجهة	SPI (up to 20 MHz)
الحزمة	SOIC-8
درجة حرارة التشغيل	-40 درجة مئوية إلى +125 درجة مئوية
المؤهلات	AEC-Q100 Grade 1

الميزات

Dual 10-bit DAC channels with simultaneous update
Internal 2.048 V voltage reference
Selectable unity or 2x gain output
SPI interface with 20 MHz clock support
Double-buffered registers for synchronous updates
Power-on Reset ensures safe startup
Rail-to-rail output
AEC-Q100 Grade 1 automotive qualified

التطبيقات

Sensor calibration and offset adjustment
Set point control in industrial systems
Portable instrumentation power control
Optical communication device calibration
Automotive analog output generation

مقدمة المنتج:MCP4812T-E/SN مقدمة المنتج

The MCP4812T-E/SN from Microchip Technology is a dual-channel 10-bit voltage output digital-to-analog converter with an internal 2.048 V reference and SPI interface. The device provides rail-to-rail output with selectable unity or 2x gain, allowing output ranges of 0-2.048 V or 0-4.096 V. Double-buffered input registers enable synchronous updates of both DAC outputs via the LDAC pin. The resistive string DAC architecture inherently provides low DNL error (±0.1 LSB) and fast 4.5 us settling time. The 415 uA typical supply current supports battery-powered applications. AEC-Q100 Grade 1 qualification ensures operation in demanding automotive environments.

مبدأ العمل:MCP4812T-E/SN مبدأ العمل

The MCP4812T-E/SN uses a resistive string (R-2R) DAC architecture where each channel has a resistor ladder network driven by the internal 2.048 V reference. The 10-bit digital code selects tap points on the resistor string, producing an analog voltage proportional to the code. The output buffer amplifier provides rail-to-rail output swing and drives external loads. The gain selection bit in the SPI command configures the output amplifier for unity gain (0 to VREF) or 2x gain (0 to 2×VREF). SPI communication writes a 16-bit command word containing channel select, gain bit, shutdown bit, and 10-bit data code. The double-buffered architecture holds new data in an input register until the LDAC pin is asserted, allowing both channels to update simultaneously. Power-on Reset clears all registers to zero-scale output.

وصف الدبوس:MCP4812T-E/SN تعريف الدبوس ووظائفه

دبوس	الاسم	النوع	الوظيفة
1	VDD	الطاقة	Power supply (2.7-5.5V)
2	CS	المدخلات	Chip select (active low)
3	SCK	المدخلات	SPI clock
4	SDI	المدخلات	SPI data input
5	LDAC	المدخلات	Latch DAC input (active low)
6	VOUTB	المخرجات	DAC channel B output
7	VSS	أرضي	أرضي
8	VOUTA	المخرجات	DAC channel A output

Application Scenarios:In which products and applications isMCP4812T-E/SN مستعمل

Sensor offset calibration and trim adjustment
Industrial process set point control
Portable instrument analog output generation
Optical transceiver bias and modulation control
Automotive sensor simulation and test equipment

Alternative Models:What chips are recommended as replacements for MCP4812T-E/SN

الشركة المصنعة	رقم الجزء	الحزمة	الملاحظات
الرقاقة الدقيقة	MCP4802T-E/SN	SOIC-8	8-bit version, same pinout
الرقاقة الدقيقة	MCP4822T-E/SN	SOIC-8	12-bit version, same pinout
تكساس إنسترومنتس	DAC60508ZRTER	QFN-16	8-channel 12-bit, SPI
الأجهزة التناظرية	AD5628BRUZ-1	TSSOP-16	8-channel 12-bit, SPI
رينيساس	ISL58315IRZ	QFN-24	Quad 10-bit DAC, SPI