参数资料
| 型号： | LT1993IUD-4#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC DIFF AMP/ADC DRVR 16-QFN |
| 标准包装： | 121 |
| 放大器类型： | 差分 |
| 电路数： | 2 |
| 输出类型： | 差分 |
| 转换速率： | 1100 V/µs |
| -3db带宽： | 900MHz |
| 电流 - 输入偏压： | 5µA |
| 电压 - 输入偏移： | 1000µV |
| 电流 - 电源： | 100mA |
| 电流 - 输出 / 通道： | 45mA |
| 电压 - 电源，单路/双路(±)： | 4 V ~ 5.5 V，±2 V ~ 2.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
| 包装： | 管件 |
| 产品目录页面： | 1322 (CN2011-ZH PDF) |
LT1993-4
1
19934fa
900MHz Low Distortion, Low
Noise Differential Amplier/
ADC Driver (AV = 4V/V)
The LT1993-4 is a low distortion, low noise Differential
Amplier/ADC driver for use in applications from DC to
900MHz. The LT1993-4 has been designed for ease of
use, with minimal support circuitry required. Exception-
ally low input-referred noise and low distortion products
(with either single-ended or differential inputs) make the
LT1993-4 an excellent solution for driving high speed 12-
bit and 14-bit ADCs. In addition to the normal unltered
outputs (+OUT and –OUT), the LT1993-4 has a built-in
175MHz differential lowpass lter and an additional pair
of ltered outputs (+OUTFILTERED, –OUTFILTERED) to
reduce external ltering components when driving high
speed ADCs. The output common mode voltage is easily set
via the VOCM pin, eliminating either an output transformer
or AC-coupling capacitors in many applications.
The LT1993-4 is designed to meet the demanding require-
ments of communications transceiver applications. It can
be used as a differential ADC driver, a general-purpose
differential gain block, or in any other application requir-
ing differential drive. The LT1993-4 can be used in data
acquisition systems required to function at frequencies
down to DC.
The LT1993-4 operates on a 5V supply and consumes
100mA. It comes in a compact 16-lead 3
× 3 QFN package
and operates over a –40°C to 85°C temperature range.
■
Differential ADC Driver for:
Imaging
Communications
■
Differential Driver/Receiver
■
Single Ended to Differential Conversion
■
Differential to Single Ended Conversion
■
Level Shifting
■
IF Sampling Receivers
■
SAW Filter Interfacing/Buffering
■
900MHz –3dB Bandwidth
■
Fixed Gain of 4V/V (12dB)
■
Low Distortion:
40dBm OIP3, –73dBc HD3 (70MHz 2VP-P)
51dBm OIP3, –94dBc HD3 (10MHz 2VP-P)
■
Low Noise: 14.5dB NF, en = 2.35nV/√Hz (70MHz)
■
Differential Inputs and Outputs
■
Additional Filtered Outputs
■
Adjustable Output Common Mode Voltage
■
DC- or AC-Coupled Operation
■
Minimal Support Circuitry Required
■
Small 0.75mm Tall 16-Lead 3
× 3 QFN Package
ADC Driver with Single-Ended to Differential Conversion
2.2V
12dB GAIN
19934 TA01
MA/COM
ETC1-1-13
1:1
Z-RATIO
LTC2255 125Msps
14-BIT ADC SAMPLING
AT 92.16Msps
70MHz
IF IN
52.3pF
82nH
LT1993-4
–INA
–INB
–OUTFILTERED
–OUT
+OUTFILTERED
+OUT
+INB
+INA
VOCM
ENABLE
LTC2255
ADC
AIN–
AIN+
0.1
F
12.2
12.2
100
0.1
F
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
FREQUENCY (MHz)
0
–120
AMPLITUDE
(dBFS)
–100
–80
–60
–40
0
5
10
15
20
LT19934 TA02
30
45
40
25
35
–20
–110
–90
–70
–50
–30
–10
32768 POINT FFT
TONE CENTER FREQUENCIES
AT 62.5MHz, 67.5MHz,
72.5MHz, 77.5MHz
4-Tone WCDMA Waveform,
LT1993-4 Driving LTC2255
14-Bit ADC at 92.16Msps
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