500 kSPS, 8-Channel, Software-Selectable,
True Bipolar Input, 12-Bit Plus Sign ADC
Enhanced Product
AD7327-EP
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
REFIN/OUT
V
CC
DD
12-bit plus sign SAR ADC
AD7327-EP
True bipolar input ranges
Software-selectable input ranges
10 V, 5 V, 2.5 V, 0 V to +10 V
Military temperature range: −55°C to +125°C
500 kSPS throughput rate
8 analog input channels with channel sequencer
Single-ended, true differential, and pseudo differential
analog input capability
V
V
V
V
V
V
V
V
0
1
2
3
4
5
6
7
IN
IN
IN
IN
IN
IN
IN
IN
2.5V
VREF
13-BIT
I/P
MUX
SUCCESSIVE
APPROXIMATION
ADC
T/H
TEMPERATURE
INDICATOR
DOUT
SCLK
CS
High analog input impedance
Low power: 18 mW
Temperature indicator
CONTROL LOGIC
AND REGISTERS
CHANNEL
SEQUENCER
DIN
Full power signal bandwidth: 22 MHz
Internal 2.5 V reference
V
DRIVE
AGND
V
DGND
High speed serial interface
SS
Power-down modes
Figure 1.
Controlled manufacturing baseline
Single assembly/test site
20-lead TSSOP package
iCMOS process technology
Qualification data available on request
the AD7327-EP can be programmed to be single-ended, true
differential, or pseudo differential.
ENHANCED PRODUCT FEATURES
The ADC contains a 2.5 V internal reference. The AD7327-EP
also allows external reference operation. If a 3 V reference is
applied to the REFIN/OUT pin, the AD7327-EP can accept a
true bipolar 12 V analog input. Minimum 12 V VDD and VSS
supplies are required for the 12 V input range. The ADC has a
high speed serial interface that can operate at throughput rates up
to 500 kSPS.
Supports defense and aerospace applications (AQEC standard)
Military temperature range: −55°C to +105°C
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available on request
The AD7327-EP is housed in a 20-lead TSSOP with operation
specified from −55°C to +125°C. Additional application and
technical information can be found in the AD7327 data sheet.
GENERAL DESCRIPTION
The AD7327-EP1 is an 8-channel, 12-bit plus sign successive
approximation ADC designed on the iCMOS™ (industrial CMOS)
process. It enables the development of a wide range of high
performance analog ICs capable of 33 V operation in a footprint
that no previous generation of high voltage devices achieved.
Unlike analog ICs using conventional CMOS processes, iCMOS
components can accept bipolar input signals while providing
increased performance, dramatically reduced power consumption,
and reduced package size.
PRODUCT HIGHLIGHTS
1. The AD7327-EP can accept true bipolar analog input
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-
ended inputs, four true differential inputs, four pseudo
differential inputs, or seven pseudo differential inputs.
3. 500 kSPS serial interface. SPI®-/QSPI™-/DSP-/MICROWIRE™-
compatible interface.
4. Low power, 18 mW, at a maximum throughput rate of
500 kSPS.
5. Channel sequencer.
The AD7327-EP can accept true bipolar analog input signals,
software-selectable from 10 V, 5 V, 2.5 V, and 0 V to +10 V.
Each analog input channel can be independently programmed
to one of the four input ranges. The analog input channels on
1 Protected by U.S. Patent No. 6,731,232.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
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Tel: 781.329.4700 ©2014–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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