AD7922ARMZ Analog Devices Inc, AD7922ARMZ Datasheet
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AD7922ARMZ
Manufacturer Part Number
AD7922ARMZ
Description
IC ADC 12BIT 1MSPS DUAL 8-MSOP
Manufacturer
Analog Devices Inc
Datasheet
1.AD7922ARM-REEL7.pdf
(32 pages)
Specifications of AD7922ARMZ
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Operating Temperature
-40°C ~ 85°C
Number Of Bits
12
Sampling Rate (per Second)
1M
Number Of Converters
1
Power Dissipation (max)
20mW
Voltage Supply Source
Single Supply
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Resolution (bits)
12bit
Input Channel Type
Single Ended
Supply Voltage Range - Analogue
2.35V To 5.25V
Supply Current
4mA
No. Of Pins
8
Sampling Rate
1MSPS
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
EVAL-AD7922CBZ - BOARD EVAL FOR AD7922
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AD7922ARMZ
Manufacturer:
ADI
Quantity:
1 000
Company:
Part Number:
AD7922ARMZ
Manufacturer:
Analog Devices Inc
Quantity:
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AD7922ARMZ
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Company:
Part Number:
AD7922ARMZ-REEL
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ADI
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1 000
Company:
Part Number:
AD7922ARMZ-REEL7
Manufacturer:
AD
Quantity:
1 560
Part Number:
AD7922ARMZ-REEL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Fast throughput rate: 1 MSPS
Specified for V
Low power:
Wide input bandwidth:
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface:
Standby mode: 1 µA maximum
Daisy-chain mode
8-lead TSOT package
8-lead MSOP package
APPLICATIONS
Battery-powered systems:
Instrumentation and control systems
Data acquisition systems
High speed modems
Optical sensors
GENERAL DESCRIPTION
The AD7912/AD7922
power, 2-channel successive approximation ADCs, respectively.
The parts operate from a single 2.35 V to 5.25 V power supply
and feature throughput rates of up to 1 MSPS. The parts contain
a low noise, wide bandwidth track-and-hold amplifier, which
can handle input frequencies in excess of 6 MHz.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the devices to interface
with microprocessors or DSPs. The conversion rate is
determined by the SCLK signal. The input signal is sampled on
the falling edge of CS and the conversion is also initiated at this
point. The channel to be converted is selected through the DIN
pin, and the mode of operation is controlled by CS . The serial
data stream from the DOUT pin has a channel identifier bit and
mode identifier bit, which provide information about the
converted channel and the current mode of operation.
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
registered trademarks are the property of their respective owners.
4.8 mW typ at 1 MSPS with 3 V supplies
15.5mW typ at 1 MSPS with 5 V supplies
71 dB minimum SNR at 100 kHz input frequency
SPI®/QSPI™/MICROWIRE™/DSP compatible
Personal digital assistants
Medical instruments
Mobile communications
DD
of 2.35 V to 5.25 V
1
are 10-bit and 12-bit, high speed, low
Several AD7912/AD7922 can be connected together in a daisy
chain. The AD7912/AD7922 feature a daisy-chain mode that
allows the user to read the conversion results from the ADCs
contained in the chain. The AD7912/AD7922 use advanced
design techniques to achieve very low power dissipation at high
throughput rates. The reference for the part is taken internally
from V
the ADC.
PRODUCT HIGHLIGHTS
1. 2-channel, 1 MSPS, 10-/12-bit ADCs in TSOT package.
2. High throughput with low power consumption.
3. Flexible power/serial clock speed management.
4. Daisy-chain mode.
5. No pipeline delay.
1
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
Protected by U.S. Patent Number 6,681,332.
The conversion rate is determined by the serial clock. The
parts also feature a power-down mode to maximize power
efficiency at lower throughput rates. Average power
consumption is reduced when the power-down mode is
used while not converting. Current consumption is 1 µA
maximum and 50 nA typically when in power-down mode.
The parts feature a standard successive approximation ADC
with accurate control of the sampling instant via a CS input
and once-off conversion control.
V
V
IN0
IN1
DD
2-Channel, 2.35 V to 5.25 V,
, thereby allowing the widest dynamic input range to
AD7912/AD7922
FUNCTIONAL BLOCK DIAGRAM
1 MSPS, 10-/12-Bit ADCs
MUX
© 2004 Analog Devices, Inc. All rights reserved.
T/H
Figure 1.
AD7912/AD7922
APPROXIMATION
CONTROL LOGIC
SUCCESSIVE
10-/12-BIT
ADC
GND
V
DD
www.analog.com
SCLK
CS
DOUT
DIN