AD7248ABRZ Analog Devices Inc, AD7248ABRZ Datasheet
AD7248ABRZ
Specifications of AD7248ABRZ
Available stocks
Related parts for AD7248ABRZ
AD7248ABRZ Summary of contents
Page 1
GENERAL DESCRIPTION The AD7245A/AD7248A is an enhanced version of the industry standard AD7245/AD7248. Improvements include operation from supplies, a ± 1/2 LSB linearity grade, faster interface times and better full scale and reference variations ...
Page 2
AD7245A/AD7248A–SPECIFICATIONS AGND = DGND = 100 pF. All specifications Parameter STATIC PERFORMANCE Resolution 3 Relative Accuracy @ 25° MIN MAX MIN MAX ...
Page 3
SWITCHING CHARACTERISTICS Parameter A, B Versions 25° MIN MAX 25° MIN MAX 25° MIN MAX t ...
Page 4
AD7245A/AD7248A AD7245A ORDERING GUIDE Temperature 1 Model Range AD7245AAN –40°C to +85°C AD7245ABN –40°C to +85°C AD7245AAQ –40°C to +85°C 3 AD7245ATQ –55°C to +125°C AD7245AAP –40°C to +85°C AD7245AAR –40°C to +85°C AD7245ABR –40°C to +85°C 3 AD7245ATE –55°C ...
Page 5
Pin Mnemonic Description l V Negative Supply Voltage (0 V for single SS supply operation Bipolar Offset Resistor. This provides OFS access to the on-chip application resistors and allows different output voltage ranges. 3 REF OUT Reference Output. ...
Page 6
AD7245A/AD7248A Pin Mnemonic Description l V Negative Supply Voltage (0 V for single SS supply operation Bipolar Offset Resistor. This provides OFS access to the on-chip application resistors and allows different output voltage ranges. 3 REF OUT Reference ...
Page 7
Typical Performance Characteristics– –15V INL INH –15V 0V, V ...
Page 8
AD7245A/AD7248A CIRCUIT INFORMATION D/A SECTION The AD7245A/AD7248A contains a 12-bit voltage mode digi- tal-to-analog converter. The output voltage from the converter has the same positive polarity as the reference voltage allowing single supply operation. The reference voltage for the DAC ...
Page 9
The data held in the DAC latch determines the analog output of the converter. Data is latched into the DAC latch on the rising edge of LDAC. This LDAC signal is an asynchronous signal and is independent of WR. This ...
Page 10
AD7245A/AD7248A The LDAC input controls the transfer of 12-bit data from the input latch to the DAC latch. This LDAC signal is also level triggered, and data is latched into the DAC latch on the rising edge of LDAC. The ...
Page 11
UNIPOLAR ( CONFIGURATION The output voltage range is achieved by tying R R and V together. For this output range the AD7245A/ FB OUT AD7248A can be operated single supply (V ...
Page 12
AD7245A/AD7248A Since the tolerance value on the reference voltage of the AD7245A/ AD7248A is ± 0.2%, then the absolute value of I ± 0.2% from device to device for a fixed value of R1. Because the input bias current of ...
Page 13
Table V. Sample Program for Loading AD7245A from 8086 ASSUME DS: DACLOAD, CS: DACLOAD DACLOAD SEGMENT AT 000 00 8CC9 MOV CS, : DEFINE DATA SEGMENT CS REGISTER 02 8ED9 MOV DS, : EQUAL TO CODE CX SEGMENT REGISTER 04 ...
Page 14
AD7245A/AD7248A A connection diagram for the interface between the AD7248A and 68008 microprocessor is shown in Figure 16. Once again the AD7248A acts as a memory mapped device and data is right justified. In this case the AD7248A is configured ...
Page 15
PIN 1 PLASTIC LEADS WILL BE EITHER SOLDER DIPPED OR TIN LEAD PLATED 24-Lead SOIC (R-24) 0.614 (15.6) 0.598 (15. 0.299 (7.6) 0.291 (7.4) 0.419 (10.65 0.394 (10.00) PIN 1 0.104 (2.65) 0.093 (2.35) 0.050 0.012 ...
Page 16
AD7245A/AD7248A 20-Lead Plastic DIP (N-20) 1.07 (27.18) MAX 20 11 0.255 (6.477) 0.245 (6.223 PIN 1 0.021 (0.533) 0.015 (0.381) 0.145 (3.683) 0.125 MIN (3.175) MIN 0.021 (0.533) 0.070 (1.77) 15 0.015 (0.381) 0.045 (1.15) LEAD NO. 1 ...