True Bipolar Input, Dual 12-Bit/14-Bit,
2-Channel, Simultaneous Sampling SAR ADC
AD7366/AD7367
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
D
A
AV
CC
DV
CC
DD
CAP
Dual 12-bit/14-bit, 2-channel ADC
True bipolar analog inputs
Programmable input ranges:
±10 V, ±± V, 0 V to 10 V
BUF
REF
AD7366/AD7367
±12 V with 3 V external reference
Throughput rate: 1 MSPS
Simultaneous conversion with read in less than 1 μs
High analog input impedance
Low current consumption:
8.3 mA typical in normal mode
320 nA typical in shutdown mode
AD7366
72 dB SNR at ±0 kHz input frequency
12-bit no missing codes
V
V
A1
A2
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
OUTPUT
DRIVERS
MUX
T/H
D
A
OUT
SCLK
CNVST
CS
BUSY
CONTROL
LOGIC
ADDR
RANGE0
RANGE1
REFSEL
V
V
B1
V
DRIVE
AD7367
76 dB SNR at ±0 kHz input frequency
14-bit no missing codes
Accurate on-chip reference: 2.± V ± 0.2%
−40°C to +8±°C operation
MUX
T/H
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
OUTPUT
DRIVERS
D
B
OUT
B2
BUF
High speed serial interface
AGND AGND
V
D
B
CAP
DGND
Compatible with SPI®, QSPI™, MICROWIRE™, and DSP
iCMOS® process technology
Available in a 24-lead TSSOP
SS
Figure 1.
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The AD7366/AD73671 are dual 12-bit/14-bit, high speed, low
power, successive approximation analog-to-digital converters
(ADCs) that feature throughput rates up to 1 MSPS. The device
contains two ADCs, each preceded by a 2-channel multiplexer,
and a low noise, wide bandwidth track-and-hold amplifier.
1. The AD7366/AD7367 can accept true bipolar analog input
signals, as well as 10 V, 5 V, 12 V (with external refer-
ence), and 0 V to 10 V unipolar signals.
2. Two complete ADC functions allow simultaneous sampling
and conversion of two channels.
3. 1 MSPS serial interface: SPI-/QSPI-/DSP-/MICROWIRE-
compatible interface.
The AD7366/AD7367 are fabricated on the Analog Devices, Inc.,
industrial CMOS process (iCMOS2), which is a technology
platform combining the advantages of low and high voltage
CMOS. The iCMOS process allows the AD7366/AD7367 to
accept high voltage bipolar signals in addition to reducing
power consumption and package size. The AD7366/AD7367
can accept true bipolar analog input signals in the 10 V range,
5 V range, and 0 V to 10 V range.
Table 1. Related Products
Throughput
Resolution Rate
Number of
Channels
Device
AD7366
AD7366-5
AD7367
AD7367-5
12-Bit
12-Bit
14-Bit
14-Bit
1 MSPS
500 kSPS
1 MSPS
Dual, 2-channel
Dual, 2-channel
Dual, 2-channel
Dual, 2-channel
500 kSPS
The AD7366/AD7367 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 and DCAPB pins, the
AD7366/AD7367 can accept a true bipolar 12 V analog input.
Minimum 12 V VDD and VSS supplies are required for the
12 V input range.
1 Protected by U.S. Patent No. 6,731,232.
2 iCMOS Process Technology. 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.
Rev. D
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
rightsof third parties that may result fromits 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.
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 ©2007-2010 Analog Devices, Inc. All rights reserved.
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