AD7367-5ARUZ AD [Analog Devices], AD7367-5ARUZ Datasheet
AD7367-5ARUZ
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AD7367-5ARUZ Summary of contents
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FEATURES 12-bit plus sign SAR ADC True bipolar input ranges Software-selectable input ranges ±10 V, ±5 V, ±2 + MSPS throughput rate Eight analog input channels with channel sequencer Single-ended true differential and pseudo ...
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AD7329 TABLE OF CONTENTS Features .............................................................................................. 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 7 Absolute Maximum Ratings............................................................ 8 ESD Caution.................................................................................. 8 Pin Configuration and ...
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SPECIFICATIONS 16 − −16 MHz MSPS unless otherwise noted. MUX S A MAX MIN directly to ADC ...
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AD7329 1 Parameter Min 4 DC ACCURACY Resolution 13 No Missing Codes 12-bit plus sign 11-bit plus sign 2 Integral Nonlinearity 2 Differential Nonlinearity 2, 5 Offset Error 2, 5 Offset Error Match 2, 5 Gain Error 2, 5 Gain ...
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Parameter Min ANALOG INPUT Input Voltage Ranges (Programmed via Range Register) Pseudo Differential V − IN Input Range DC Leakage Current Input Capacitance 3 3 ADC ± Capacitance IN 3 MUX − Capacitance OUT 3 MUX + Capacitance OUT ...
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AD7329 1 Parameter Min CONVERSION RATE Conversion Time Track-and-Hold Acquisition Time 2, 3 Throughput Rate POWER REQUIREMENTS − 2 2.7 DRIVE Normal Mode (Static) Normal Mode (Operational ...
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TIMING SPECIFICATIONS 16 − −16 Timing specifications apply with load, unless otherwise noted. MUX MIN connected directly to ADC −, which ...
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AD7329 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted A Table 4. Parameter V to AGND, DGND AGND, DGND AGND, DGND AGND, DGND DRIVE AGND ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Descriptions 24 SCLK Serial Clock, Logic Input. A serial clock input provides the SCLK used for accessing the data from the AD7329. This clock is also used ...
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AD7329 Pin No. Mnemonic Descriptions 17 MUX − Negative Multiplexer Output. This pin allows access to the on-chip track-and-hold. The voltage applied to this OUT pin is still a high voltage signal when the AD7329 is in differential mode. When ...
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TYPICAL PERFORMANCE CHARACTERISTICS 0 4096 POINT FFT V CC – 25°C A INT/EXT 2.5V REFERENCE –40 ±10V RANGE f = 50kHz IN SNR = 77.30dB –60 SINAD = 76.85dB THD = –86.96dB SFDR = –88.22dB –80 ...
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AD7329 – DRIVE V = 12V –12V DD SS – 25° 1MSPS S –60 INTERNAL REFERENCE AD8021 BETWEEN MUX OUT+ AND ADC PINS –65 IN+ –70 0V ...
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12V RANGE = ±10V 10k SAMPLES T = 25° 1201 1165 –3 –2 – CODE Figure 16. ...
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AD7329 –50 SINGLE-ENDED MODE V = 12V –12V DD SS – DRIVE INTERNAL REFERENCE AD8021 BETWEEN MUX + OUT –60 AND ADC + PINS IN –65 –70 –75 –80 –85 –90 10 ...
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TERMINOLOGY Differential Nonlinearity This is the difference between the measured and the ideal 1 LSB change between any two adjacent codes in the ADC. Integral Nonlinearity This is the maximum deviation from a straight line passing through the endpoints of ...
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AD7329 Channel-to-Channel Isolation Channel-to-channel isolation is a measure of the level of crosstalk between any two channels measured by applying a full-scale, 100 kHz sine wave signal to all unselected input channels and determining the degree to which ...
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THEORY OF OPERATION CIRCUIT INFORMATION The AD7329 is a fast, 8-channel, 12-bit plus sign, bipolar input, serial A/D converter. The AD7329 can accept bipolar input ranges that include ±10 V, ±5 V, and ±2 can also accept a ...
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AD7329 Figure 26 shows the differential configuration during the acquisition phase. For the conversion phase, SW3 opens and SW1 and SW2 move to Position B (see Figure impedances of the source driving the V match; otherwise, the two inputs have ...
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V DD MUX + ADC OUT MUX – ADC OUT D V – Figure 31. Equivalent Analog Input Circuit (Differential) Care ...
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AD7329 TYPICAL CONNECTION DIAGRAM Figure 34 shows a typical connection diagram for the AD7329. In this configuration, the AGND pin is connected to the analog ground plane of the system, and the DGND pin is connected to the digital ground ...
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This voltage is set up externally, and its range varies with reference voltage. As the reference voltage increases, the common-mode range decreases. When driving the differential inputs with an amplifier, the actual common-mode range is determined by the amplifier’s output ...
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AD7329 Pseudo Differential Inputs The AD7329 can have four pseudo differential pairs or seven pseudo differential inputs referenced to a common V The V + inputs are coupled to the signal source and must have IN an amplitude within the ...
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DRIVER AMPLIFIER CHOICE In applications where the harmonic distortion and signal-to- noise ratio are critical specifications, the analog input of the AD7329 should be driven from a low impedance source. Large source impedances significantly affect the ac performance of the ...
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AD7329 1.5kΩ 2kΩ 1.5kΩ 1.5kΩ 1.5kΩ 1.5kΩ 10kΩ Figure 45. Single-Ended-to-Differential Configuration with the for Bipolar Operation 442Ω 442Ω AD8021 V IN 442Ω 442Ω 442Ω 442Ω AD8021 100Ω Figure 46. Single-Ended-to-Differential Configuration with the V+ V– Figure 47. ...
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REGISTERS The AD7329 has four programmable registers: the control register, sequence register, Range Register 1, and Range Register 2. These registers are write-only registers. ADDRESSING REGISTERS A serial transfer on the AD7329 consists of 16 SCLK cycles. The three MSBs ...
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AD7329 CONTROL REGISTER The control register is used to select the analog input channel, analog input configuration, reference, coding, and power mode. The control register is a write-only, 12-bit register. Data loaded on the DIN line corresponds to the AD7329 ...
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Table 13. Power Mode Selection PM1 PM0 Description 1 1 Full Shutdown Mode. In this mode, all internal circuitry on the AD7329 is powered down. Information in the control register is retained when the AD7329 is in full shutdown mode. ...
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AD7329 SEQUENCE REGISTER The sequence register on the AD7329 is an 8-bit, write-only register. Each of the eight analog input channels has one corresponding bit in the sequence register. To select a channel for inclusion in the sequence, set the ...
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SEQUENCER OPERATION CS DIN: WRITE TO CONTROL REGISTER TO STOP THE SEQUENCE, Seq1 = 0, Seq2 = 0. DOUT: CONVERSION RESULT FROM CHANNEL IN SEQUENCE. The AD7329 can be configured to automatically cycle through a number of selected channels using ...
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AD7329 If a change to one of the range registers is required during a sequence necessary to first stop the sequence by writing to the control register and setting Seq1 to 0 and Seq2 to 0. Next, the ...
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REFERENCE The AD7329 can operate with either the internal 2.5 V on-chip reference or an externally applied reference. The internal reference is selected by setting the Ref bit in the control register power-up, the Ref bit is ...
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AD7329 MODES OF OPERATION The AD7329 has several modes of operation that are designed to provide flexible power management options. These options can be chosen to optimize the power dissipation/throughput rate ratio for different application requirements. The mode of operation ...
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AUTOSHUTDOWN MODE (PM1 = 1, PM0 = 0) Once the autoshutdown mode is selected, the AD7329 automatically enters shutdown on the 15 autoshutdown mode, all internal circuitry is powered down. The AD7329 retains information in the registers during autoshutdown. The ...
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AD7329 POWER VS. THROUGHPUT RATE The power consumption of the AD7329 varies with throughput rate. The static power consumed by the AD7329 is very low, and significant power savings can be achieved as the throughput rate is reduced. Figure 55 ...
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SERIAL INTERFACE Figure 57 shows the timing diagram for the serial interface of the AD7329. The serial clock applied to the SCLK pin provides the conversion clock and controls the transfer of information to and from the AD7329 during a ...
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AD7329 MICROPROCESSOR INTERFACING The serial interface on the AD7329 allows the part to be directly connected to a range of different microprocessors. This section explains how to interface the AD7329 with some of the most common microcontroller and DSP serial ...
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OUTLINE DIMENSIONS 0.15 0.05 ORDERING GUIDE Model Temperature Range 1 AD7329BRUZ –40°C to +85°C 1 AD7329BRUZ-REEL –40°C to +85°C 1 AD7329BRUZ-REEL7 –40°C to +85°C 2 EVAL-AD7329CB 3 EVAL-CONTROL BRD2 Pb-free part. 2 This can be used as ...
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AD7329 NOTES Rev Page ...
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NOTES Rev Page AD7329 ...
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AD7329 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05402-0-4/06(0) Rev Page ...