LTC1407ACMSE 查看數據表（PDF） - Linear Technology

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LTC1407ACMSE

Serial 12-Bit/14-Bit, 3Msps Simultaneous Sampling ADCs with Shutdown

Linear Technology 

FEATURES

s 3Msps Sampling ADC with Two Simultaneous

Differential Inputs

s 1.5Msps Throughput per Channel

s Low Power Dissipation: 14mW (Typ)

s 3V Single Supply Operation

s 2.5V Internal Bandgap Reference with External

Overdrive

s 3-Wire Serial Interface

s Sleep (10µW) Shutdown Mode

s Nap (3mW) Shutdown Mode

s 80dB Common Mode Rejection at 100kHz

s 0V to 2.5V Unipolar Input Range

s Tiny 10-Lead MS Package

U

APPLICATIO S

s Telecommunications

s Data Acquisition Systems

s Uninterrupted Power Supplies

s Multiphase Motor Control

s I & Q Demodulation

s Industrial Control

BLOCK DIAGRA

10µF 3V

CH0+

CH0–

CH1+

CH1–

10µF

1+

S&H

2–

4+

S&H

5–

VREF

3

GND

6

11 EXPOSED PAD

7

VDD

MUX

3Msps

14-BIT ADC

2.5V

REFERENCE

LTC1407/LTC1407A

Serial 12-Bit/14-Bit, 3Msps

Simultaneous Sampling

ADCs with Shutdown

DESCRIPTIO

The LTC®1407/LTC1407A are 12-bit/14-bit, 3Msps ADCs

with two 1.5Msps simultaneously sampled differential

inputs. The devices draw only 4.7mA from a single 3V

supply and come in a tiny 10-lead MS package. A Sleep

shutdown feature lowers power consumption to 10µW.

The combination of speed, low power and tiny package

makes the LTC1407/LTC1407A suitable for high speed,

portable applications.

The LTC1407/LTC1407A contain two separate differential

inputs that are sampled simultaneously on the rising edge

of the CONV signal. These two sampled inputs are then

converted at a rate of 1.5Msps per channel.

The 80dB common mode rejection allows users to elimi-

nate ground loops and common mode noise by measuring

signals differentially from the source.

The devices convert 0V to 2.5V unipolar inputs differen-

tially. The absolute voltage swing for CH0+, CH0–, CH1+

and CH1– extends from ground to the supply voltage.

The serial interface sends out the two conversion results in

32 clocks for compatibility with standard serial interfaces.

, LTC and LT are registered trademarks of Linear Technology Corporation.

LTC1407A

THREE-

STATE

SERIAL

OUTPUT

PORT

8 SDO

TIMING

LOGIC

10 CONV

9 SCK

1407A BD

–44

–50

–56

–62

–68

–74

–80

–86

–92

–98

–104

0.1

THD, 2nd and 3rd

vs Input Frequency

THD

2nd

3rd

1

10

FREQUENCY (MHz)

100

1407 G02

1407f

1

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