LTC1400CS8 Linear Technology, LTC1400CS8 Datasheet

IC A/D CONV 12BIT W/SHTDN 8-SOIC

LTC1400CS8

Manufacturer Part Number
LTC1400CS8
Description
IC A/D CONV 12BIT W/SHTDN 8-SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1400CS8

Number Of Bits
12
Sampling Rate (per Second)
400k
Data Interface
MICROWIRE™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
160mW
Voltage Supply Source
Dual ±
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1400CS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC1400CS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
Complete 12-Bit ADC in SO-8
Single Supply 5V or ±5V Operation
Sample Rate: 400ksps
Power Dissipation: 75mW (Typ)
72dB S/(N + D) and –80dB THD at Nyquist
No Missing Codes over Temperature
Nap Mode with Instant Wake-Up: 6mW
Sleep Mode: 30μW
High Impedance Analog Input
Input Range (1mV/LSB): 0V to 4.096V or ±2.048V
Internal Reference Can Be Overdriven Externally
3-Wire Interface to DSPs and Processors (SPI and
MICROWIRE
High Speed Data Acquisition
Digital Signal Processing
Multiplexed Data Acquisition Systems
Audio and Telecom Processing
Digital Radio
Spectrum Analysis
Low Power and Battery-Operated Systems
Handheld or Portable Instruments
Single 5V Supply, 400kHz, 12-Bit Sampling A/D Converter
2.42V REF
ANALOG INPUT
(0V TO 4.096V)
10µF
OUT
+
5V
+
TM
Compatible)
10µF
U
0.1µF
0.1µF
V
A
V
GND
CC
IN
REF
U
LTC1400
CONV
D
CLK
V
OUT
SS
DATA LINK
SERIAL
1400 TA01
MPU
P1.4
P1.3
P1.2
DESCRIPTIO
The LTC
which draws only 75mW from 5V or ±5V supplies. This
easy-to-use device comes complete with a 200ns sample-
and-hold and a precision reference. Unipolar and bipolar
conversion modes add to the flexibility of the ADC. The
LTC1400 has two power saving modes: Nap and Sleep.
In Nap mode, it consumes only 6mW of power and can
wake up and convert immediately. In the Sleep mode, it
consumes 30μW of power typically. Upon power-up from
Sleep mode, a reference ready (REFRDY) signal is available
in the serial data word to indicate that the reference has
settled and the chip is ready to convert.
The LTC1400 converts 0V to 4.096V unipolar inputs from
a single 5V supply and ±2.048V bipolar inputs from ±5V
supplies. Maximum DC specs include ±1LSB INL, ±1LSB
DNL and 45ppm/°C drift over temperature. Guaranteed AC
performance includes 70dB S/(N + D) and –76dB THD at
an input frequency of 100kHz, over temperature.
The 3-wire serial port allows compact and efficient data
transfer to a wide range of microprocessors, microcon-
trollers and DSPs.
All other trademarks are the property of their respective owners.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
®
Complete SO-8, 12-Bit,
1400 is a complete 400ksps, 12-bit A/D converter
0.001
0.01
Power Consumption vs Sample Rate
100
0.1
10
1
0.01
0.1
400ksps ADC with
U
NORMAL CONVERSION
NAP MODE
BETWEEN CONVERSION
1
SAMPLE RATE (Hz)
SLEEP MODE BETWEEN
CONVERSION
10
SLEEP AND NAP MODE
BETWEEN CONVERSION
100
1k
6.4MHz CLOCK
Shutdown
10k 100k
LTC1400
1400 TA02
1M
1400fa
1

Related parts for LTC1400CS8

LTC1400CS8 Summary of contents

Page 1

... The 3-wire serial port allows compact and efficient data transfer to a wide range of microprocessors, microcon- trollers and DSPs. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners ...

Page 2

... A CONV CLK 3 6 REF GND OUT S8 PACKAGE 8-LEAD PLASTIC 150°C, θ = 130°C/W JMAX JA S8 PART MARKING LTC1400CS8 1400 LTC1400IS8 1400I http://www.linear.com/leadfree/ MIN TYP MAX 4.75 4.75 –2.45 –5.25 15 ● 1.0 ● 5.0 ● 0.3 ● 0.2 ● 1 ● ...

Page 3

CO VERTER CHARACTERISTICS U temperature range, otherwise specifications are at T PARAMETER CONDITIONS Resolution (No Missing Codes) Integral Linearity Error (Note 9) Differential Linearity Error Offset Error (Note 10) Full-Scale Error Full-Scale Tempco I OUT(REF ACCURACY U ...

Page 4

LTC1400 DIGITAL I PUTS A D DIGITAL OUTPUTS U U full operating temperature range, otherwise specifications are at T SYMBOL PARAMETER V Low Level Output Voltage OL I Hi-Z Output Leakage D OZ OUT C Hi-Z Output Capacitance D OZ ...

Page 5

TYPICAL PERFOR A CE CHARACTERISTICS W U Differential Nonlinearity vs Output Code 1. 400kHz SAMPLE 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 0 512 1024 1536 2048 2560 3072 3584 4096 OUTPUT CODE 1400 TPC01 Signal-to-Noise Ratio ...

Page 6

LTC1400 PI FU CTIO (Pin 1): Positive Supply, 5V. Bypass to GND (10μF CC tantalum in parallel with 0.1μF ceramic). A (Pin 2): Analog Input 4.096V (Unipolar), ±2.048V IN (Bipolar). V (Pin 3): ...

Page 7

APPLICATIO S I FOR ATIO U U Conversion Details The LTC1400 uses a successive approximation algorithm and an internal sample-and-hold circuit to convert an analog signal to a 12-bit serial output based on a preci- sion internal reference. The control ...

Page 8

LTC1400 APPLICATIO S I FOR ATIO 400kHz SAMPLE – 199.121kHz IN –20 SINAD = 72.1dB THD = – 80dB –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 ...

Page 9

... The following list is a summary of the op amps that are suitable for driving the LTC1400, more detailed informa- 1400 F05 tion is available in the Linear Technology databooks or the Linear Technology Website. LT1215/LT1216: Dual and quad 23MHz, 50V/μs single supply op amps. Single 5V to ±15V supplies, 6.6mA specifi ...

Page 10

LTC1400 APPLICATIO S I FOR ATIO U U trimmed to 2.42V internally connected to the DAC and is available at Pin 3 to provide up to 1mA of current to an external load. For minimum code transition noise, ...

Page 11

APPLICATIO S I FOR ATIO 50Ω – 100Ω 10k R3 10k FULL-SCALE ADJUST ADDITIONAL PINS OMITTED FOR CLARITY ±20LSB TRIM RANGE Figure 10a. LTC1400 Full-Scale Adjust Circuit R1 10k ANALOG + ...

Page 12

LTC1400 APPLICATIO S I FOR ATIO U U Input signal leads to A and signal return leads from GND IN (Pin 4) should be kept as short as possible to minimize noise coupling. In applications where this is not possible, ...

Page 13

APPLICATIO S I FOR ATIO the Sleep mode, power consumption is reduced to a minimum by cutting off the supply to all internal circuitry including the reference. Figure 12 shows the ways to power down the LTC1400. ...

Page 14

LTC1400 TYPICAL APPLICATIO S U Hardware Interface to TMS320C50’s TDM Serial Port (Frame Sync is Generated from TFSX) + 10µF Logic Analyzer Waveforms Show 3.2μs Throughput Rate (Input Voltage = 3.046V, Output Code = 1011 1110 0110 = 3046 Data ...

Page 15

TYPICAL APPLICATIO S U THIS PROGRAM DEMONSTRATES LTC1400 INTERFACE TO TMS320C50 FRAME SYNC PULSE IS GENERATED FROM TFSX *Initialization* .mmregs ; Defines global symbolic names ;- - Initialized data memory to zero .ds 0F00h ; Initialize data to zero DATA0 ...

Page 16

LTC1400 TYPICAL APPLICATIO S U LTC1400 Interface to ADSP2181’s SPORT0 (Frame Sync is Generated from RFS0) + 10µF Logic Analyzer Waveforms Show 2.88μs Throughput Rate (Input Voltage = 2.240V, Output Code = 1000 1100 0000 = 2240 X RDY Data ...

Page 17

TYPICAL APPLICATIO S U THIS PROGRAM DEMONSTRATES LTC1400 INTERFACE TO ADSP-2181 FRAME SYNC PULSE IS GENERATED FROM RFS0 /*Section 1: Initialization*/ .module/ram/abs = 0 adspltc; /*define the program module*/ jump start; /*jump over interrupt vectors*/ nop; nop; nop; rti; rti; ...

Page 18

LTC1400 TYPICAL APPLICATIO S U Quick Look Circuit for Converting Data to Parallel Format 5V + 10µF ANALOG INPUT (0V TO 4.096V) 2.42V REFERENCE + OUTPUT 10µF 0.1µ CONV 0.1µF LTC1400 7 CONV ...

Page 19

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 20

... Inputs, MSOP and SO-8 1.22mW, 1-/2-Channel Inputs, MSOP and SO-8 4.25mW, 1-/2-Channel Inputs, MSOP and SO-8 www.linear.com ● TMS320C50 TCLKX TCLKR TFSX TFSR TDR 1400 TA04a ADSP2181 SCLKO RFSO DR0 1400 TA05a LT 0606 REV A • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 2006 1400fa ...

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