AD7237AARZ Analog Devices Inc, AD7237AARZ Datasheet
AD7237AARZ
Specifications of AD7237AARZ
Available stocks
Related parts for AD7237AARZ
AD7237AARZ Summary of contents
Page 1
FEATURES Complete Dual 12-Bit DAC Comprising Two 12-Bit CMOS DACs On-Chip Voltage Reference Output Amplifiers Reference Buffer Amplifiers Improved AD7237/AD7247 Operation Faster Interface –30 ns typ Data Setup Time Parallel Loading Structure: AD7247A (8+4) ...
Page 2
AD7237A/AD7247A–SPECIFICATIONS 100 pF. All specifications Parameter A STATIC PERFORMANCE Resolution 12 3 Relative Accuracy 1 3 Differential Nonlinearity 0.9 3 Unipolar Offset Error 3 3 Bipolar Zero Error 6 ...
Page 3
TIMING CHARACTERISTICS Limit MIN Parameter (A, B Versions NOTES 1 ...
Page 4
AD7237A/AD7247A AD7237A PIN FUNCTION DESCRIPTION (DIP PIN NUMBERS) Pin Mnemonic Description 1 REF INA Voltage Reference Input for DAC A. The reference voltage for DAC A is applied to this pin internally buffered before being applied to the ...
Page 5
AD7247A PIN FUNCTION DESCRIPTION (DIP PIN NUMBERS) Pin Mnemonic Description 1 REF OUT Voltage Reference Output. The internal 5 V analog reference is provided at this pin. To operate the part with internal reference, REF OUT should be connected to ...
Page 6
AD7237A/AD7247A TERMINOLOGY RELATIVE ACCURACY (LINEARITY) Relative Accuracy, or endpoint linearity measure of the maximum deviation of the DAC transfer function from a straight line passing through the endpoints of the transfer func- tion measured after allowing ...
Page 7
Power Supply Current vs. Temperature Noise Spectral Density vs. Frequency Single Supply Sink Current vs. Output Voltage REV. 0 AD7237A/AD7247A DAC-to-DAC Linearity Matching Power Supply Rejection Ratio vs. Frequency Linearity vs. Power Supply Voltage –7– ...
Page 8
AD7237A/AD7247A CIRCUIT INFORMATION D/A Section The AD7237A/AD7247A contains two 12-bit voltage-mode D/A converters consisting of highly stable thin film resistors and high speed NMOS single-pole, double-throw switches. The output voltage from the converters has the same polarity as the refer- ...
Page 9
Table I. AD7247A Truth Table CSA CSB WR Function Data Transfer Data Transfer DAC A Latch Transparent DAC B Latch Transparent Both DAC ...
Page 10
AD7237A/AD7247A APPLYING THE AD7237A/AD7247A The internal scaling resistors provided on the AD7237A/ AD7247A allow several output voltage ranges. The part can produce unipolar output ranges +10 V and a bipolar ...
Page 11
MICROPROCESSOR INTERFACING—AD7247A Figures show interfaces between the AD7247A and the ADSP-2101 DSP processor and the 8086 and 68000 16-bit microprocessors. In all three interfaces, the AD7247A is memory-mapped with a separate memory address for each DAC. AD7247A—ADSP-2101 ...
Page 12
AD7237A/AD7247A Either high byte or low byte data can be written first to the in- put latch. A write to the AD7237A DAC Latch address transfers the data from the input latches to the respective DAC latches and updates both ...