品牌：AD
批号：17+
数量:10000
封装:SSOP
价格:面议
说明：全新原装现货，可出样品
IC特征：FEATURES
Ultralow noise preamplifier
Voltage noise = 0.74 nV/√Hz
Current noise = 2.5 pA/√Hz
3 dB bandwidth
AD8331: 120 MHz
AD8332, AD8334: 100 MHz
Low power
AD8331: 125 mW/channel
AD8332, AD8334: 145 mW/channel
Wide gain range with programmable postamp
−4.5 dB to +43.5 dB
+7.5 dB to +55.5 dB
Low output-referred noise: 48 nV/√Hz typical
Active input impedance matching
Optimized for 10-bit/12-bit ADCs
Selectable output clamping level
Single 5 V supply operation
AD8332 and AD8334 available in lead frame chip scale package
APPLICATIONS
Ultrasound and sonar time-gain controls
High performance AGC systems
I/Q signal processing
High speed, dual ADC drivers
GENERAL DESCRIPTION
The AD8331/AD8332/AD8334 are single-, dual-, and quadchannel
ultralow noise, linear-in-dB, variable gain amplifiers
(VGAs). Optimized for ultrasound systems, they are usable as a
low noise variable gain element at frequencies up to 120 MHz.
Included in each channel are an ultralow noise preamplifier
(LNA), an X-AMP® VGA with 48 dB of gain range, and a
selectable gain postamplifier with adjustable output limiting.
The LNA gain is 19 dB with a single-ended input and
differential outputs. Using a single resistor, the LNA input
impedance can be adjusted to match a signal source without
compromising noise performance.
The 48 dB gain range of the VGA makes these devices suitable
for a variety of applications. Excellent bandwidth uniformity is
maintained across the entire range. The gain control interface
provides precise linear-in-dB scaling of 50 dB/V for control
voltages between 40 mV and 1 V. Factory trim ensures excellent
part-to-part and channel-to-channel gain matching.
Differential signal paths result in superb second- and thirdorder
distortion performance and low crosstalk.
The VGA’s low output-referred noise is advantageous in driving
high speed differential ADCs. The gain of the postamplifier can
be pin selected to 3.5 dB or 15.5 dB to optimize gain range and
output noise for 12-bit or 10-bit converter applications. The
output can be limited to a user-selected clamping level,
preventing input overload to a subsequent ADC. An external
resistor adjusts the clamping level.
The operating temperature range is −40°C to +85°C. The
AD8331 is available in a 20-lead QSOP package, the AD8332 is
available in 28-lead TSSOP and 32-lead LFCSP packages, and
the AD8334 is available in a 64-lead LFCSP package.
联系人:程小姐
手机:15919480276
电话:0755- 21015360 & 23038182
传真:0755-23038182
地址:深圳市福田区振华路海外装饰大厦综合大楼2栋B段4楼4014B-33C
