True Bipolar Input, Dual 12-Bit/14-Bit,
2-Channel, Simultaneous Sampling SAR ADC
Rev. D
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FEATURES
Dual 12-bit/14-bit, 2-channel ADC
True bipolar analog inputs
Programmable input ranges:
±10 V, ±5 V, 0 V to 10 V
±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 50 kHz input frequency
12-bit no missing codes
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
High speed serial interface
Compatible with SPI®, QSPI™, MICROWIRE™, and DSP
iCMOS® process technology
Available in a 24-lead TSSOP
FUNCTIONAL BLOCK DIAGRAM
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
D
OUT
A
OUTPUT
DRIVERS
CONTROL
LOGIC
T/H
BUF
V
A1
V
A2
MUX
REF
AD7366/AD7367
V
DRIVE
D
CAP
A AV
CC
DV
CC
BUF
D
OUT
B
OUTPUT
DRIVERS
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
T/H
V
B1
V
B2
AGND AGND V
SS
DGNDD
CAP
B
CS
SCLK
CNVST
BUSY
ADDR
RANGE0
RANGE1
REFSEL
MUX
V
DD
06703-001
Figure 1.
GENERAL DESCRIPTION
The AD7366/AD7367
1
The AD7366/AD7367 are fabricated on the Analog Devices, Inc.,
industrial CMOS process (iCMOS
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.
2
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 D
CAP
A and
D
CAP
B pins, the
AD7366/AD7367 can accept a true bipolar ±12 V analog input.
Minimum ±12 V V
DD
and V
SS
supplies are required for the
±12 V input range.
), 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.
PRODUCT HIGHLIGHTS
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.
Table 1. Related Products
Device Resolution
Throughput
Rate
Number of
Channels
AD7366 12-Bit 1 MSPS Dual, 2-channel
AD7366-5 12-Bit 500 kSPS Dual, 2-channel
AD7367 14-Bit 1 MSPS Dual, 2-channel
AD7367-5 14-Bit 500 kSPS Dual, 2-channel
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.
