True Bipolar Input, Dual 1 μs,
12-/14-Bit, 2-Channel SAR ADCs
AD7366/AD7367
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
D
A
AV
DV
CC
DD
CAP
CC
Dual 12-bit/14-bit, 2-channel ADC
True bipolar analog inputs
Programmable input ranges:
10 V, 5 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 1μs
High analog input impedance
Low current consumption:
V
V
A1
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
OUTPUT
DRIVERS
MUX
T/H
D
A
OUT
A2
SCLK
CNVST
8.3 mA typical in normal mode
320nA typical in shutdown mode
AD7366
72 dB SNR at 50 kHz input frequency
12-bit no missing codes
CS
BUSY
ADDR
RANGE0
RANGE1
REFSEL
CONTROL
LOGIC
V
V
B1
V
DRIVE
AD7367
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
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
PRODUCT HIGHLIGHTS
The AD7366/AD73671 are dual, 12/14-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 ±1ꢀ ꢁ, ±± ꢁ, ±12 ꢁ (with external refer-
ence), and ꢀ ꢁ to +1ꢀ ꢁ unipolar signals.
2. Two complete ADC functions allow simultaneous
sampling and conversion of two channels.
The AD7366/AD7367 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 AD7366/AD7367 to accept high
voltage bipolar signals in addition to reducing power consump-
tion and package size. The AD7366/AD7367 can accept true
bipolar analog input signals in the ±1ꢀ ꢁ range, ±± ꢁ range,
and ꢀ ꢁ to 1ꢀ ꢁ range.
3. 1 MSPS serial interface; SPI-/QSPI-/DSP-/MICROWIRE-
compatible interface.
Table 1. Related Products
Throughput
Rate
Number of
Channels
Device
Resolution
12-Bit
AD7366
AD7366-5
AD7367
AD7367-5
1 MSPS
Dual, 2-channel
Dual, 2-channel
Dual, 2-channel
Dual, 2-channel
12-Bit
500 kSPS
1 MSPS
14-Bit
The AD7366/AD7367 have an on-chip 2.± ꢁ reference that
can be disabled to allow the use of an external reference. If a
3 ꢁ reference is applied to the DCAPA andDCAPB pins, the
AD7366/AD7367 can accept a true bipolar ±12 ꢁ analog input.
Minimum ±12 ꢁ ꢁDD and ꢁSS supplies are required for the
±12 ꢁ input range.
14-Bit
500 kSPS
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. 0
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
Fax: 781.461.3113
www.analog.com
©2007 Analog Devices, Inc. All rights reserved.
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