AD7367_15 Datasheet, PDF (1/29 Pages) Analog Devices – True Bipolar Input, Dual 12-Bit/14-Bit, 2-Channel, Simultaneous Sampling SAR ADC

True Bipolar Input, Dual 12-Bit/14-Bit,
2-Channel, Simultaneous Sampling SAR ADC
AD7366/AD7367
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
GENERAL DESCRIPTION
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.
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.
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_CAPA and D_CAPB 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.
FUNCTIONAL BLOCK DIAGRAM
V_DD
D_CAPA
AV_CC
DV_CC
REF
V_A1
MUX
V_A2
V_B1
MUX
V_B2
BUF
AD7366/AD7367
T/H
T/H
BUF
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
OUTPUT
DRIVERS
CONTROL
LOGIC
12-/14-BIT
SUCCESSIVE
APPROXIMATION
ADC
OUTPUT
DRIVERS
D_OUTA
SCLK
CNVST
CS
BUSY
ADDR
RANGE0
RANGE1
REFSEL
V_DRIVE
D_OUTB
AGND AGND
V_SS D_CAPB
Figure 1.
DGND
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
AD7366
AD7366-5
AD7367
AD7367-5
Resolution
12-Bit
12-Bit
14-Bit
14-Bit
Throughput
Rate
1 MSPS
500 kSPS
1 MSPS
500 kSPS
Number of
Channels
Dual, 2-channel
Dual, 2-channel
Dual, 2-channel
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.
Rev. D
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