參數(shù)資料
型號(hào)： AD7920BKS-REEL7
廠商： ANALOG DEVICES INC
元件分類： ADC
英文描述： 250 kSPS, 10-/12-Bit ADCs in 6-Lead SC70
中文描述： 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO6
封裝： MO-203AB, SC-70, 6 PIN
文件頁(yè)數(shù)： 1/20頁(yè)
文件大小： 1091K
代理商： AD7920BKS-REEL7
REV. B
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. 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.
Tel: 781/329-4700
www.analog.com
AD7910/AD7920
*
250 kSPS,
10-/12-Bit ADCs in 6-Lead SC70
FEATURES
Throughput Rate: 250 kSPS
Specified for V
DD
of 2.35 V to 5.25 V
Low Power:
3.6 mW Typ at 250 kSPS with 3 V Supplies
12.5 mW Typ at 250 kSPS with 5 V Supplies
Wide Input Bandwidth:
71 dB SNR at 100 kHz Input Frequency
Flexible Power/Serial Clock Speed Management
No Pipeline Delays
High Speed Serial Interface
SPI
/QSPI/MICROWIRE/DSP Compatible
Standby Mode: 1 A Max
6-Lead SC70 Package
8-Lead MSOP Package
APPLICATIONS
Battery-Powered Systems
Personal Digital Assistants
Medical Instruments
Mobile Communications
Instrumentation and Control Systems
Data Acquisition Systems
High Speed Modems
Optical Sensors
FUNCTIONAL BLOCK DIAGRAM
10-/12-BIT
SUCCESSIVE-
APPROXIMATION
ADC
CONTROL
LOGIC
AD7910/AD7920
GND
V
DD
V
IN
SCLK
SDATA
CS
T/H
GENERAL DESCRIPTION
The AD7910/AD7920 are, respectively, 10-bit and 12-bit, high
speed, low power, successive-approximation ADCs. The parts
operate from a single 2.35 V to 5.25 V power supply and feature
throughput rates up to 250 kSPS. The parts contain a low noise,
wide bandwidth track-and-hold amplifier that can handle input
frequencies in excess of 13 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 input signal is sampled on
the falling edge of
CS
and the conversion is also initiated at this
point. There are no pipeline delays associated with the part.
The AD7910/AD7920 use advanced design techniques to achieve
very low power dissipation at high throughput rates.
The reference for the part is taken internally from V
DD.
This
allows the widest dynamic input range to the ADC. Thus the
analog input range for the part is 0 to V
DD
. The conversion rate
is determined by the SCLK.
PRODUCT HIGHLIGHTS
1. 10-/12-Bit ADCs in SC70 and MSOP Packages.
2. Low Power Consumption.
3. Flexible Power/Serial Clock Speed Management.
The conversion rate is determined by the serial clock, allowing
the conversion time to be reduced through the serial clock
speed increase. This allows the average power consumption to
be reduced when power-down mode is used while not convert-
ing. The part also features a power-down mode to maximize
power efficiency at lower throughput rates. Current consumption
is 1 A max and 50 nA typically when in power-down mode.
4. Reference Derived from the Power Supply.
5. No Pipeline Delay.
The parts feature a standard successive-approximation ADC
with accurate control of the sampling instant via a
CS
input
and once-off conversion control.
*
Protected by U.S.Patent No. 6,681,332.
相關(guān)PDF資料
PDF描述
AD7920BRM 250 kSPS, 10-/12-Bit ADCs in 6-Lead SC70
AD7910 250 kSPS, 10-/12-Bit ADCs in 6-Lead SC70
AD7910AKS-500RL7 250 kSPS, 10-/12-Bit ADCs in 6-Lead SC70
AD7920AKS-500RL7 250 kSPS, 10-/12-Bit ADCs in 6-Lead SC70
AD7920BKS 250 kSPS, 10-/12-Bit ADCs in 6-Lead SC70
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