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LTC1402CGN#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
22
LTC1402
TYPICAL APPLICATION
U
Using Quad Cable Drivers/Receivers in Remote
LTC1402 Applications
In some applications, the host controller or main proces-
sor may be located some distance from the sensor, the
signal conditioning circuitry, and the ADC. In these appli-
cations, maintaining serial data integrity over long cable
distances can be a challenge. The circuit in Figure 15
shows one way to convey the LTC1402’s high-speed serial
data over a long distance. The circuit uses the LTC1688
quad cable driver and an LTC1520 quad cable receiver to
transmit/receive the LTC1402’s high-speed 35.2Mbps
serial data to the DSPs serial port over category-5
unshielded cable. Using these devices, the LTC1402’s
serial data can be transmitted up to 100 feet without data
corruption. Because the SCK, CONV and D
OUT
signals
originate at the LTC1402, they arrive at the serial port with
similar delays and remain synchronized. When the data is
received at the serial port of the DSP or other controller,
the port must be programmed to respond to the appropri-
ate SCK and CONV edges. It is also necessary to check
where the 12-bit output DATA resides in the 16-bit data
frame. The TMS320C54x serial port READ instructions
can shift the 12-bit data to the preferred position within the
16-bit data frame.
Figure 15. The LTC1402 3-Wire Serial Port Sends Data Over 100 Feet of Category-5
Twisted Pair with the LTC1688/LTC1520 Quad Driver/Receiver Pairs
100Ω100Ω
100Ω100Ω
100Ω100Ω
SIGNAL
CONV
2.2Msps
CLK
35.2MHz
LTC1688
QUAD DRIVER
LTC1520
QUAD RECEIVER
PIN 4 = ENA
PIN12 = ENB
CATEGORY-5
UNSHIELDED CABLE
UP TO 100 FEET
REMEE PART NO.
5A244UTPM30BU
14
14
15
4
4
15
12
13
13
1
7
9
8
2
3
6
5
10
11
16
5V
5V
10µF
0V
DD
CONV
SCK
D
OUT
OGND
11
16
15
10
9
A
IN
+
A
IN
–
DV
DD
3
4
LTC1402
2
1
7
6
10
9
8
11
5
3
16
V
DD
GND
BFSR
BCLKR
BDR
TMS320C54x
23
LTC1402
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
GN16 (SSOP) 1098
* DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
12
3
4
5
6
7
8
0.229 – 0.244
(5.817 – 6.198)
0.150 – 0.157**
(3.810 – 3.988)
16
15
14
13
0.189 – 0.196*
(4.801 – 4.978)
12 11 10
9
0.016 – 0.050
(0.406 – 1.270)
0.015
± 0.004
(0.38 ± 0.10)
× 45°
0° – 8° TYP
0.007 – 0.0098
(0.178 – 0.249)
0.053 – 0.068
(1.351 – 1.727)
0.008 – 0.012
(0.203 – 0.305)
0.004 – 0.0098
(0.102 – 0.249)
0.0250
(0.635)
BSC
0.009
(0.229)
REF
PACKAGE DESCRIPTION
U
Dimensions in inches (millimeters) unless otherwise noted.
GN Package
16-Lead Plastic SSOP (Narrow 0.150)
(LTC DWG # 05-08-1641)
24
LTC1402
1402f LT/TP 0800 4K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1999
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
RELATED PARTS
PART NUMBER RESOLUTION SPEED COMMENTS
16-Bit
LTC1604 16 333ksps ±2.5V Input Range, ±5V Supply
LTC1605 16 100ksps ±10V Input Range, Single 5V Supply
LTC1606 16 250ksps ±10V Input Range, Pin-Compatible with LTC1605
LTC1608 16 500ksps ±2.5V Input Range, Pin-Compatible with LTC1604
14-Bit
LTC1414 14 2.2Msps 175mW, 80dB SINAD and 95dB SFDR
LTC1419 14 800ksps 150mW, 81.5dB SINAD and 95dB SFDR
LTC1416 14 400ksps 75mW, Low Power with Excellent AC Specs
LTC1418 14 200ksps 15mW, Single 5V, Serial/Parallel I/O
12-Bit
LTC1412 12 3Msps 150mW, 72dB SINAD and 82dB SFDR
LTC1410 12 1.25Msps 150mW, 71.5dB SINAD and 84dB THD
LTC1415 12 1.25Msps 55mW, Single 5V Supply
LTC1409 12 800ksps 80mW, 71.5dB SINAD and 84dB THD
LTC1404 12 600ksps High Speed Serial I/O in SO-8 Package
LTC1400 12 400ksps High Speed Serial I/O in SO-8 Package
PART NUMBER DESCRIPTION COMMENTS
References
LT1019-2.5 Precision Band Gap Voltage Reference 3ppm/°C Drift, 0.5% Max Initial Accuracy
LT1460-2.5 Micropower Series Voltage Reference 0.075% Initial Accuracy, 10ppm/°C Max Drift
LT1461-2.5 Precision Voltage Reference 3ppm/°C Drift, 0.05% Max Initial Accuracy
DACs
LTC1451 12-Bit V
OUT
DAC SO-8 Package, 12-Bit Monotonic Overtemperature
LTC1452 12-Bit V
OUT
Multiplying DAC SO-8 Package, 2.7V to 5.5V Operation
LTC1456 12-Bit V
OUT
DAC 0.5LSB DNL, SO-8 Package, Internal Reference
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LTC1402CGN#TRPBF

Mfr. #:
Buy LTC1402CGN#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC Serial 12-B, 2.2Msps Smpl ADC w/ SD
Lifecycle:
New from this manufacturer.
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