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LTC1407 데이터시트 PDF




Linear에서 제조한 전자 부품 LTC1407은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 LTC1407 기능
기능 Simultaneous Sampling ADCs
제조업체 Linear
로고 Linear 로고


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LTC1407 데이터시트, 핀배열, 회로
FEATURES
n 3Msps Sampling ADC with Two Simultaneous
Differential Inputs
n 1.5Msps Throughput per Channel
n Low Power Dissipation: 14mW (Typ)
n 3V Single Supply Operation
n 2.5V Internal Bandgap Reference with External
Overdrive
n 3-Wire Serial Interface
n Sleep (10μW) Shutdown Mode
n Nap (3mW) Shutdown Mode
n 80dB Common Mode Rejection at 100kHz
n 0V to 2.5V Unipolar Input Range
n Tiny 10-Lead MS Package
APPLICATIONS
n Telecommunications
n Data Acquisition Systems
n Uninterrupted Power Supplies
n Multiphase Motor Control
n I and Q Demodulation
n Industrial Control
LTC1407/LTC1407A
Serial 12-Bit/14-Bit, 3Msps
Simultaneous Sampling
ADCs with Shutdown
DESCRIPTION
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 eliminate
ground loops and common mode noise by measuring
signals differentially from the source.
The devices convert 0V to 2.5V unipolar inputs differentially.
The absolute voltage swing for CH0+, CH0, CH1+ and
CH1extends from ground to the supply voltage.
The serial interface sends out the two conversion results in 32
clocks for compatibility with standard serial interfaces.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6084440, 6522187.
BLOCK DIAGRAM
10μF 3V
CH0+
CH0
CH1+
CH1
10μF
1+
S AND H
2
4+
S AND H
5
3 VREF
GND
6
11 EXPOSED PAD
7
VDD
MUX
3Msps
14-BIT ADC
2.5V
REFERENCE
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
1407fb
1




LTC1407 pdf, 반도체, 판매, 대치품
LTC1407/LTC1407A
DIGITAL INPUTS AND DIGITAL OUTPUTS The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. VDD = 3V.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIH
VIL
IIN
CIN
VOH
VOL
IOZ
COZ
ISOURCE
ISINK
High Level Input Voltage
Low Level Input Voltage
Digital Input Current
Digital Input Capacitance
High Level Output Voltage
Low Level Output Voltage
Hi-Z Output Leakage DOUT
Hi-Z Output Capacitance DOUT
Output Short-Circuit Source Current
Output Short-Circuit Sink Current
VDD = 3.3V
VDD = 2.7V
VIN = 0V to VDD
VDD = 3V, IOUT = –200μA
VDD = 2.7V, IOUT = 160μA
VDD = 2.7V, IOUT = 1.6mA
VOUT = 0V to VDD
VOUT = 0V, VDD = 3V
VOUT = VDD = 3V
l 2.4
l 0.6
l ±10
5
l 2.5
2.9
0.05
l 0.10 0.4
l ±10
1
20
15
V
V
μA
pF
V
V
V
μA
pF
mA
mA
POWER REQUIREMENTS The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. With internal reference, VDD = 3V.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VDD Supply Voltage
2.7 3.6 V
IDD Supply Current
Active Mode, fSAMPLE = 1.5Msps
Active Mode (LTC1407H/LTC1407AH)
Nap Mode
Nap Mode (LTC1407H/LTC1407AH)
Sleep Mode (LTC1407/LTC1407H)
Sleep Mode (LTC1407A/LTC1407AH)
l
4.7 7.0
mA
l
5.2 8.0
mA
l
1.1 1.5
mA
l
1.2 1.8
mA
2.0 15
μA
2.0 10
μA
PD
Active Mode with SCK in Fixed State (Hi or Lo)
12 mW
TIMING CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VDD = 3V.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
fSAMPLE(MAX) Maximum Sampling Frequency per Channel
(Conversion Rate)
l 1.5
MHz
tTHROUGHPUT Minimum Sampling Period (Conversion + Acquisiton Period)
l 667 ns
tSCK Clock Period
(Note 16)
l 19.6
10000
ns
tCONV
Conversion Time
(Note 6)
32 34
SCLK cycles
t1 Minimum Positive or Negative SCLK Pulse Width
(Note 6)
2
ns
t2 CONV to SCK Setup Time
(Notes 6, 10)
3
10000
ns
t3 SCK Before CONV
(Note 6)
0
ns
t4 Minimum Positive or Negative CONV Pulse Width (Note 6)
4
ns
t5 SCK to Sample Mode
(Note 6)
4
ns
t6 CONV to Hold Mode
(Notes 6, 11)
1.2
ns
1407fb
4

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LTC1407 전자부품, 판매, 대치품
LTC1407/LTC1407A
TYPICAL PERFORMANCE CHARACTERISTICS VDD = 3V, TA = 25°C (LTC1407/LTC1407A)
Full-Scale Signal Frequency
Response
12
6
0
–6
–12
–18
–24
–30
–36
1M
10M 100M
FREQUENCY (Hz)
1G
1407 G07
CMRR vs Frequency
0
–20
–40
–60
CH0 CH1
–80
–100
–120
100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
1407 G08
Crosstalk vs Frequency
–20
–30
–40
–50
–60
CH1 TO CH0
–70
CH0 TO CH1
–80
–90
100
1k 10k 100k 1M
FREQUENCY (Hz)
10M
1407 G09
Simultaneous Input Steps at CH0
and CH1 from 25Ω
3.0
2.6
2.2
1.8
1.4
CH0
CH1
1.0
0.6
0.2
–0.2
–0.6
0
5 10 15 20 25 30
TIME (ns)
1407 G10
Reference Voltage vs VDD
2.4902
PSSR vs Frequency
–25
–30
–35
–40
–45
–50
–55
–60
–65
–70
1
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
1407 G11
Reference Voltage
vs Load Current
2.4902
2.4900
2.4900
2.4898
2.4898
2.4896
2.4896
2.4894
2.4894
2.4892
2.4892
2.4890
2.6 2.8 3.0 3.2 3.4 3.6
VDD (V)
1407 G12
2.4890
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
LOAD CURRENT (mA)
1407 G13
1407fb
7

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