Datasheet AD7327-EP (Analog Devices)

500 kSPS, 8-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC Enhanced Product AD7327-EP FEATURES FUNCTIONAL BLOCK DIAGRAM 12-bit plus sign SAR ADC VDD REFIN/OUT VCC True bipolar input ranges AD7327-EP Software-selectable input ranges ±10 V, ±5 V, ±2.5 V, 0 V to +10 V VIN0 2.5V V VREF 500 kSPS throughput rate IN1 13-BIT VIN2 I/P SUCCESSIVE 8 analog input channels with channel sequencer MUX T/H V APPROXIMATION IN3 ADC Single-ended, true differential, and pseudo differential VIN4 VIN5 analog input capability VIN6 TEMPERATURE INDICATOR High analog input impedance VIN7 Low power: 18 mW DOUT Temperature indicator CONTROL LOGIC SCLK AND REGISTERS CS Full power signal bandwidth: 22 MHz CHANNEL SEQUENCER DIN Internal 2.5 V reference High speed serial interface VDRIVE
01
Power-down modes
-0
AGND V
81
20-lead TSSOP package SS DGND
124 Figure 1.
i CMOS process technology ENHANCED PRODUCT FEATURES Supports defense and aerospace applications (AQEC standard) Military temperature range: −55°C to +125°C Controlled manufacturing baseline One assembly/test site
The ADC contains a 2.5 V internal reference. The AD7327-EP
One fabrication site
also allows external reference operation. If a 3 V reference is
Product change notification
applied to the REFIN/OUT pin, the AD7327-EP can accept a
Qualification data available on request
true bipolar ±12 V analog input. Minimum ±12 V VDD and VSS
GENERAL DESCRIPTION
supplies are required for the ±12 V input range. The ADC has a The AD7327-EP1 is an 8-channel, 12-bit plus sign successive high speed serial interface that can operate at throughput rates up approximation ADC designed on the iCMOS® (industrial CMOS) to 500 kSPS. process. It enables the development of a wide range of high The AD7327-EP is housed in a 20-lead TSSOP with operation performance analog ICs capable of 33 V operation in a footprint specified from −55°C to +125°C. Additional application and that no previous generation of high voltage devices achieved. technical information can be found in the AD7327 data sheet. Unlike analog ICs using conventional CMOS processes, iCMOS
PRODUCT HIGHLIGHTS
components can accept bipolar input signals while providing increased performance, dramatically reduced power consumption, 1. The AD7327-EP can accept true bipolar analog input and reduced package size. signals, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V (unipolar). 2. The eight analog inputs can be configured as eight single- The AD7327-EP can accept true bipolar analog input signals, ended inputs, four true differential inputs, four pseudo software-selectable from ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. differential inputs, or seven pseudo differential inputs. Each analog input channel can be independently programmed 3. 500 kSPS serial interface. SPI®-/QSPI™-/DSP-/MICROWIRE™- to one of the four input ranges. The analog input channels on compatible interface. the AD7327-EP can be programmed to be single-ended, true 4. Low power, 18 mW, at a maximum throughput rate of differential, or pseudo differential. 500 kSPS. 5. Channel sequencer. 1 Protected by U.S. Patent No. 6,731,232.
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Document Outline FEATURES ENHANCED PRODUCT FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS OUTLINE DIMENSIONS ORDERING GUIDE