THS4509 Datasheet_PDF文件下载_芯片资料查询

Fully Differential Architecture

Centered Input Common-mode Range

Minimum Gain of 2V/V (6 dB)

Bandwidth: 1900 MHz (100 mVpp, G = 10 dB,

R

L

= 200

鈩?

Slew Rate: 6600 V/碌s (2V step, G = 10 dB)

1% Settling Time: 2 ns (2 V step, G = 10 dB)

HD

2

: 鈥?5 dBc at 100 MHz (2 Vpp, G = 10 dB,

R

L

= 1 k鈩?

HD

3

: 鈥?0 dBc at 100 MHz (2 Vpp, G = 10 dB,

R

L

= 1 k鈩?

OIP

2

: 79 dBm at 70 MHz (2 Vpp envelope,

G = 10 dB)

OIP

3

: 43 dBm at 70 MHz (2 Vpp envelope,

G = 10 dB)

Input Voltage Noise: 1.9 nV/鈭欻z (f >10 MHz)

Noise Figure: 17.1 dB (50

鈩?/div>

System, G = 10

dB)

Output Common-Mode Control

Power Supply:

鈥?Voltage: 3 V (卤1.5 V) to 5 V (卤2.5 V)

鈥?Current: 37.7 mA

Power-Down Capability: 0.65 mA

To allow for dc coupling to ADCs, its unique output

common-mode control circuit maintains the output

common-mode voltage within 3 mV offset (typ) from

the set voltage, when set within 0.5 V of mid-supply,

with less than 4 mV differential offset voltage. The

common-mode set point is set to mid-supply by

internal circuitry, which may be over-driven from an

external source.

The input and output are optimized for best perform-

ance with their common-mode voltages set to

mid-supply. Along with high performance at low

power supply voltage, this makes for extremely high

performance single supply 5 V data acquisition sys-

tems. The combined performance of the THS4509 in

a gain of 10 dB driving the ADS5500 ADC, sampling

at 125 MSPS, is 81 dBc SFDR and 69.1 dBc SNR

with a 鈥? dBFS signal at 70 MHz.

The THS4509 is offered in a Quad 16-pin leadless

QFN package (RGT), and is characterized for oper-

ation over the full industrial temperature range from

鈥?0掳C to 85掳C.

From

50

鈩?/div>

Source

V

IN

100

鈩?/div>

69.8

鈩?/div>

348

鈩?/div>

2.5 V

487

鈩?/div>

THS 4509

1:1

56.3

鈩?/div>

Open

100

鈩?/div>

0.22

碌F

49.9

鈩?/div>

69.8

鈩?/div>

487

鈩?/div>

V

OUT

To 50

鈩?/div>

Test

Equipment

鈥?/div>

CM

鈭?.5 V

348

鈩?/div>

APPLICATIONS

5 V Data Acquisition Systems High

Linearity ADC Amplifier

Wireless Communication

Medical Imaging

Test and Measurement

-75

-80

G = 10 dB,

V

O

= 2 V

PP

,

R

L

= 1 kW

Harmonic Distortion - dBc

-85

-90

-95

HD

3

-100

-105

-1 10

1

10

f - Frequency - MHz

100

DESCRIPTION

The THS4509 is a wideband, fully differential op amp

designed for 5 V data acquisition systems. It has very

low noise at 1.9 nV/鈭欻z, and extremely low harmonic

distortion of 鈥?5 dBc HD

2

and 鈥?0 dBc HD

3

at 100

MHz with 2 Vpp, G = 10 dB, and 1 k鈩?load. Slew rate

is very high at 6600 V碌s and with settling time of 2 ns

to 1% (2 V step) it is ideal for pulsed applications. It is

designed for minimum gain of 6 dB, but is optimized

for gain of 10 dB.

HD

2

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

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