AD7920BRMZ Analog Devices Inc, AD7920BRMZ Datasheet
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AD7920BRMZ
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AD7920BRMZ Summary of contents
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FEATURES Throughput rate: 250 kSPS Specified for Low power 3.6 mW typ at 250 kSPS with 3 V supplies 12.5 mW typ at 250 kSPS with 5 V supplies Wide input bandwidth ...
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AD7910/AD7920 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Specifications..................................................................................... 3 AD7910 .......................................................................................... 3 AD7920 .......................................................................................... 4 Timing Specifications .................................................................. 6 Timing Examples .............................................................................. 7 Timing Example ...
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SPECIFICATIONS AD7910 MHz SCLK SAMPLE Table 1. 1 Parameter DYNAMIC PERFORMANCE 3 Signal-to-Noise + Distortion (SINAD) 3 Total Harmonic Distortion (THD) Peak Harmonic or Spurious Noise (SFDR) 3 ...
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AD7910/AD7920 1 Parameter 6 Power Dissipation Normal Mode (Operational) Full Power-Down 1 Temperature range from −40°C to +85°C. 2 Operational from V = 2.0 V, with input high voltage ( See the Terminology section. 4 SC70 values guaranteed ...
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Parameter LOGIC INPUTS Input High Voltage, V INH Input Low Voltage, V INL Input Current SCLK Pin IN Input Current Pin IN 6 Input Capacitance LOGIC OUTPUTS Output High Voltage ...
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AD7910/AD7920 TIMING SPECIFICATIONS MIN MAX Table 3. AD7910/AD7920 1 Parameter Limit MIN MAX SCLK × t ...
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TIMING EXAMPLES Figure 3 and Figure 4 show some of the timing parameters from Table 3. TIMING EXAMPLE 1 From Figure 4, having MHz and a throughput rate of SCLK 250 kSPS gives a cycle time of ...
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AD7910/AD7920 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to GND DD Analog Input Voltage to GND Digital Input Voltage to GND Digital Output Voltage to GND Input Current to Any Pin Except Supplies ...
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PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS AD7910/ AD7920 GND SDATA 2 5 TOP VIEW (Not to Scale) V SCLK Figure 5. 6-Lead SC70 Pin Configuration Table 5. Pin Function Descriptions Pin No. Pin ...
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AD7910/AD7920 TYPICAL PERFORMANCE CHARACTERISTICS Figure 7 and Figure 8 show a typical FFT plot for the AD7920 and AD7910, respectively 250 kSPS sampling rate and a 100 kHz input frequency. Figure 9 shows the signal-to-(noise + distortion) ratio ...
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V = 2.35V DD 0.8 TEMP = 25° 250kSPS SAMPLE 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 512 1024 1536 2048 2560 CODE Figure 11. AD7920 DNL Performance – 3.6V DD –20 ...
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AD7910/AD7920 TERMINOLOGY Integral Nonlinearity The maximum deviation from a straight line passing through the endpoints of the ADC transfer function. For the AD7920 and AD7910, the endpoints of the transfer function are zero scale, a point 1 LSB below the ...
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CIRCUIT INFORMATION The AD7910/AD7920 are fast, micropower, 10-bit/12-bit, single-supply A/D converters, respectively. The parts can be operated from a 2. 5.25 V supply. When operated from either supply supply, the AD7910/AD7920 ...
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AD7910/AD7920 CONVERTER OPERATION The AD7910/AD7920 are successive approximation analog-to- digital converters based around a charge redistribution DAC. Figure 14 and Figure 15 show simplified schematics of the ADC. Figure 14 shows the ADC during its acquisition phase. When SW2 is ...
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REF193 μ 1.2mA μ μ 0 TANT 680nF V DD AD7910/ AD7920 SCLK IN INPUT SDATA CS GND SERIAL INTERFACE Figure 17. REF193 as Power Supply Table 6 provides typical ...
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AD7910/AD7920 MODES OF OPERATION The mode of operation of the AD7910/AD7920 is selected by controlling the logic state of the CS signal during a conversion. There are two possible modes of operation, normal mode and power-down mode. The point at ...
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CS SCLK SDATA CS SCLK SDATA THE PART BEGINS TO POWER SCLK SDATA When power supplies are first applied to the AD7910/AD7920, the ADC can power up in either power-down mode or in normal mode. Because ...
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AD7910/AD7920 POWER VS. THROUGHPUT RATE By using the power-down mode on the AD7910/AD7920 when not converting, the average power consumption of the ADC decreases at lower throughput rates. Figure 22 shows how, as the throughput rate is reduced, the device ...
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SERIAL INTERFACE Figure 23 and Figure 24 show the detailed timing diagram for serial interfacing to the AD7920 and AD7910, respectively. The serial clock provides the conversion clock and also controls the transfer of information from the AD7910/AD7920 during conversion. ...
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AD7910/AD7920 MICROPROCESSOR INTERFACING The serial interface on the AD7910/AD7920 allows the parts to be directly connected to a range of different microprocessors. This section explains how to interface the AD7910/AD7920 with some of the more common microcontroller and DSP serial ...
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For example, the ADSP-2111 has a master clock frequency of 16 MHz. If the SCLKDIV register is loaded with the value 3, an SCLK of 2 MHz is obtained and eight master clock periods elapse for every one SCLK period. ...
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AD7910/AD7920 APPLICATION HINTS GROUNDING AND LAYOUT The printed circuit board that houses the AD7910/AD7920 should be designed such that the analog and digital sections are separated and confined to certain areas of the board. This facilitates the use of ground ...
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OUTLINE DIMENSIONS 2.20 2.00 1.80 2.40 1. 1.25 2. 1.80 1.15 PIN 1 0.65 BSC 1.30 BSC 1.00 0.40 1.10 0.90 0.10 0.80 0.70 0.30 0.10 MAX SEATING 0.15 PLANE 0.10 COPLANARITY COMPLIANT TO ...
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... AD7920BRM −40°C to +85°C AD7920BRM-REEL −40°C to +85°C AD7920BRM-REEL7 −40°C to +85°C 2 AD7920BRMZ −40°C to +85°C 2 AD7920BRMZ-REEL −40°C to +85°C 2 AD7920BRMZ-REEL7 −40°C to +85°C 3 EVAL-AD7910CB 3 EVAL-AD7920CB 4 EVAL-CONTROL BRD2 1 Linearity error refers to integral nonlinearity Pb-free part. 3 This can be used as a standalone evaluation board or in conjunction with the EVAL-CONTROL BRD2 for evaluation/demonstration purposes ...