AD7249ANZ Analog Devices Inc, AD7249ANZ Datasheet
AD7249ANZ
Specifications of AD7249ANZ
Related parts for AD7249ANZ
AD7249ANZ Summary of contents
Page 1
GENERAL DESCRIPTION The AD7249 DACPORT contains a pair of 12-bit, voltage- output, digital-to-analog converters with output amplifiers and Zener voltage reference on a monolithic CMOS chip. No exter- nal trims are required to achieve full specified performance. The output ...
Page 2
AD7249–SPECIFICATIONS + 100 pF to AGND. All specifications Parameter A Version STATIC PERFORMANCE Resolution 12 ± Relative Accuracy ± 0.9 3 Differential Nonlinearity ± Unipolar ...
Page 3
TIMING CHARACTERISTICS Limit at T MIN Parameter (All Versions 200 150 ...
Page 4
AD7249 PIN FUNCTION DESCRIPTION (DIP & SOIC PIN NUMBERS) Pin Mnemonic Description 11 REFOUT Voltage Reference Output. The internal 5 V analog reference is provided at this pin. To operate the part using its internal reference, REFOUT should be connected ...
Page 5
TERMINOLOGY Bipolar Zero Error Bipolar Zero Error is the voltage measured at V DAC is configured for bipolar output and loaded with all 0s (Twos Complement Coding) or with 1000 0000 0000 (Offset Binary Coding due to a ...
Page 6
AD7249 Internal Reference The AD7249 has an on-chip temperature compensated buried Zener reference which is factory trimmed ± 50 mV. The reference voltage is provided at the REFOUT pin. This refer- ence can be used to provide ...
Page 7
DIGITAL INTERFACE The AD7249 contains an input serial to parallel shift register and a DAC latch for both DAC A and DAC B. A simplified diagram of the input loading circuitry is shown in Figure 7. Serial data on the ...
Page 8
AD7249 t 1 SCLK t 2 SYNC DB15 DB14 DB13 SDIN DON'T DON'T DON'T CARE CARE CARE LDAC CLR TRANSFER FUNCTION The internal scaling resistors provided on the AD7249 allow several output voltage ranges. The part ...
Page 9
Bipolar ( 5 V) Configuration The bipolar configuration for the AD7249, which gives an out- put range of – achieved by connecting The AD7249 must be operated from dual OFSB ...
Page 10
AD7249 MICROPROCESSOR INTERFACING Microprocessor interfacing to the AD7249 is via a serial bus which uses standard protocol compatible with DSP processors and microcontrollers. The communications channel requires a three-wire interface consisting of a clock signal, a data signal and a ...
Page 11
AD7249–68HC11 Interface Figure 14 shows a serial interface between the AD7249 and the 68HC11 microcontroller. SCK of the 68HC11 drives SCLK of the AD7249 while the MOSI output drives the serial data line of the AD7249. The SYNC signal is ...
Page 12
AD7249 DATA OUT CLOCK OUT CONTROLLER SYNC OUT CONTROL OUT 0.200 (5.05) 0.125 (3.18) Wide Body SOIC (R-16) 0.413 (10.50) 0.348 (10.10 0.299 (7.60) 0.291 (7.40) 0.419 (10.65 0.404 (10.26) PIN 1 0.107 (2.72) 0.050 (1.27) ...