Datasheet AD7366, AD7367 (Analog Devices)

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True Bipolar Input, Dual 12-Bit/14-Bit, 2-Channel, Simultaneous Sampling SAR ADC AD7366/AD7367 FEATURES FUNCTIONAL BLOCK DIAGRAM Dual 12-bit/14-bit, 2-channel ADC V D DD CAPA AVCC DVCC True bipolar analog inputs Programmable input ranges: REF BUF AD7366/AD7367 ±10 V, ±5 V, 0 V to 10 V ±12 V with 3 V external reference VA1 Throughput rate: 1 MSPS 12-/14-BIT Simultaneous conversion with read in less than 1 μs SUCCESSIVE OUTPUT MUX T/H APPROXIMATION DOUTA DRIVERS High analog input impedance ADC VA2 Low current consumption: SCLK CNVST 8.3 mA typical in normal mode CS 320 nA typical in shutdown mode CONTROL BUSY LOGIC AD7366 ADDR RANGE0 72 dB SNR at 50 kHz input frequency RANGE1 12-bit no missing codes REFSEL VB1 VDRIVE AD7367 76 dB SNR at 50 kHz input frequency MUX T/H 12-/14-BIT 14-bit no missing codes SUCCESSIVE OUTPUT DOUTB APPROXIMATION DRIVERS Accurate on-chip reference: 2.5 V ± 0.2% ADC V −40°C to +85°C operation B2 BUF High speed serial interface
001
Compatible with SPI®, QSPI™, MICROWIRE™, and DSP AGND AGND VSS D DGND CAPB
06703-
i CMOS® process technology
Figure 1.
Available in a 24-lead TSSOP GENERAL DESCRIPTION PRODUCT HIGHLIGHTS
The AD7366/AD73671 are dual 12-bit/14-bit, high speed, low 1. The AD7366/AD7367 can accept true bipolar analog input power, successive approximation analog-to-digital converters signals, as well as ±10 V, ±5 V, ±12 V (with external refer- (ADCs) that feature throughput rates up to 1 MSPS. The device ence), and 0 V to 10 V unipolar signals. contains two ADCs, each preceded by a 2-channel multiplexer, 2. Two complete ADC functions allow simultaneous sampling and a low noise, wide bandwidth track-and-hold amplifier. and conversion of two channels. The AD7366/AD7367 are fabricated on the Analog Devices, Inc., 3. 1 MSPS serial interface: SPI-/QSPI-/DSP-/MICROWIRE- industrial CMOS process (iCMOS2), which is a technology compatible interface. platform combining the advantages of low and high voltage
Table 1. Related Products
CMOS. The iCMOS process allows the AD7366/AD7367 to
Throughput Number of
accept high voltage bipolar signals in addition to reducing
Device Resolution Rate Channels
power consumption and package size. The AD7366/AD7367 AD7366 12-Bit 1 MSPS Dual, 2-channel can accept true bipolar analog input signals in the ±10 V range, AD7366-5 12-Bit 500 kSPS Dual, 2-channel ±5 V range, and 0 V to 10 V range. AD7367 14-Bit 1 MSPS Dual, 2-channel The AD7366/AD7367 have an on-chip 2.5 V reference that AD7367-5 14-Bit 500 kSPS Dual, 2-channel can be disabled to allow the use of an external reference. 1 If a 3 V reference is applied to the D Protected by U.S. Patent No. 6,731,232. CAPA and DCAPB pins, the 2 iCMOS Process Technology. For analog systems designers within AD7366/AD7367 can accept a true bipolar ±12 V analog input. industrial/instrumentation equipment OEMs who need high performance Minimum ±12 V V ICs at higher voltage levels, iCMOS is a technology platform that enables the DD and VSS supplies are required for the development of analog ICs capable of 30 V and operating at ±15 V supplies ±12 V input range. while allowing dramatic reductions in power consumption and package size, and increased ac and dc performance.
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Document Outline Features Functional Block Diagram General Description Product Highlights Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Circuit Information Converter Operation Analog Inputs Transfer Function Track-and-Hold Typical Connection Diagram Driver Amplifier Choice VDRIVE Reference Modes of Operation Normal Mode Shutdown Mode Power-Up Times Serial Interface Microprocessor Interfacing AD7366/AD7367 to ADSP-218x AD7366/AD7367 to ADSP-BF53x AD7366/AD7367 to TMS320VC5506 AD7366/AD7367 to DSP563xx Application Hints Layout and Grounding Outline Dimensions Ordering Guide