True Bipolar Input, 12-/14-Bit,
2-Channel, Simultaneous Sampling SAR ADCs
AD7366-5/AD7367-5
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
D
A
AV
DV
CC
Dual 12-bit/14-bit, 2-channel ADCs
True bipolar analog inputs
Programmable input ranges
10 V, 5 V, 0 V to +10 V
DD
CAP
CC
BUF
REF
AD7366-5/AD7367-5
12 V with +3 V external reference
Throughput rate: 500 kSPS
Simultaneous conversion with read in less than 2 μs
High analog input impedance
Low current consumption
5.1 mA typical in normal mode
320 nA typical in shutdown mode
AD7366-5
72 dB SNR at 50 kHz input frequency
12-bit no missing codes
AD7367-5
76 dB SNR at 50 kHz input frequency
14-bit no missing codes
Accurate on-chip reference: 2.5 V 0.2%
–40°C to +85°C operation
V
V
A1
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
OUTPUT
DRIVERS
MUX
T/H
D
A
OUT
A2
SCLK
CNVST
CS
BUSY
ADDR
RANGE0
RANGE1
REFSEL
CONTROL
LOGIC
V
V
B1
V
DRIVE
MUX
T/H
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
OUTPUT
DRIVERS
D
B
OUT
B2
BUF
High speed serial interface
SPI-/QSPI-/MICROWIRE-/DSP-compatible
iCMOS process technology
Available in a 24-lead TSSOP
AGND AGND
V
D
B
DGND
SS
CAP
Figure 1.
GENERAL DESCRIPTION
The devices have an on-chip 2.5 V reference that can be disabled to
allow the use of an external reference. If a 3 V reference is applied
to the DCAPA andDCAPB pins, the AD7366-5/AD7367-5 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 AD7366-5/AD7367-51 are dual, 12-/14-bit, low power,
successive approximation analog-to-digital converters (ADCs)
that feature throughput rates up to 500 kSPS. Each device contains
two ADCs, which are both preceded by a 2-channel multiplexer,
and a low noise, wide bandwidth, track-and-hold amplifier.
PRODUCT HIGHLIGHTS
The AD7366-5/AD7367-5 are fabricated on the Analog
Devices, Inc., industrial CMOS process (iCMOS®)2, which is
a technology platform combining the advantages of low and
high voltage CMOS. The process allows the parts to accept
high voltage bipolar signals in addition to reducing power
consumption and package size. The AD7366-5/AD7367-5 can
accept true bipolar analog input signals in the 10 V range,
5 V range, and 0 V to +10 V range.
1. True bipolar analog input signals can be accepted, as well
as 10 V, 5 V, 12 V (with external reference), and 0 V to
+10 V unipolar signals.
2. Two complete ADC functions allow simultaneous
sampling and conversion of two channels.
3. A 500 kSPS serial interface is SPI-/QSPI™-/MICROWIRE™-/
DSP-compatible.
Table 1. Related Products
Device
Resolution
Throughput Rate
1 MSPS
No. of Channels
Dual, 2-channel
Dual, 2-channel
Dual, 2-channel
Dual, 2-channel
AD7366
AD7366-5
AD7367
AD7367-5
12-Bit
1 Protected by U.S. Patent No. 6,731,232.
2 For analog systems designers within industrial/instrumentation equipment
OEMs who need high performance ICs at higher voltage levels, iCMOS is a
technology platform that enables the development of analog ICs capable of
+30 V and operating at 15 V supplies while allowing dramatic reductions in
power consumption and package size, and increased ac and dc performance.
12-Bit
500 kSPS
14-Bit
1 MSPS
14-Bit
500 kSPS
Rev. B
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 and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2007-2011 Analog Devices, Inc. All rights reserved.
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