LTC1091CN8#PBF Linear Technology, LTC1091CN8#PBF Datasheet

IC DATA ACQ SYS 10BIT 2CH 8-DIP

LTC1091CN8#PBF

Manufacturer Part Number
LTC1091CN8#PBF
Description
IC DATA ACQ SYS 10BIT 2CH 8-DIP
Manufacturer
Linear Technology
Type
Data Acquisition System (DAS), ADCr
Datasheet

Specifications of LTC1091CN8#PBF

Resolution (bits)
10 b
Data Interface
Serial
Voltage Supply Source
Single Supply
Voltage - Supply
4.5 V ~ 10 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Sampling Rate (per Second)
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1091CN8#PBFLTC1091CN8
Manufacturer:
LT
Quantity:
5 510
Company:
Part Number:
LTC1091CN8#PBFLTC1091CN8
Manufacturer:
NSMDA
Quantity:
5 510
Company:
Part Number:
LTC1091CN8#PBFLTC1091CN8
Manufacturer:
LT
Quantity:
1 565
Company:
Part Number:
LTC1091CN8#PBFLTC1091CN8
Manufacturer:
LT/凌特
Quantity:
20 000
Company:
Part Number:
LTC1091CN8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL
DESCRIPTIO
The LTC
acquisition systems are designed to provide complete
function, excellent accuracy and ease of use when digitiz-
ing analog data from a wide variety of signal sources and
transducers. Built around a 10-bit, switched capacitor,
successive approximation A/D core, these devices include
software configurable analog multiplexers and bipolar and
unipolar conversion modes as well as on-chip sample-
Programmable Features
– Unipolar/Bipolar Conversions
– Differential/Single-Ended Multiplexer
Sample-and-Holds
Single Supply 5V, 10V or 5V Operation
Direct 3- or 4-Wire Interface to Most MPU Serial
Ports and All MPU Parallel I/O Ports
Analog Inputs Common Mode to Supply Rails
Resolution: 10 Bits
Total Unadjusted Error (A Grade): 1LSB Over Temp
Fast Conversion Time: 20 s
Low Supply Current
ANALOG INPUT #1
ANALOG INPUT #2
0V TO 5V RANGE
0V TO 5V RANGE
Configurations
LTC1091: 3.5mA Max, 1.5mA Typ
LTC1092/LTC1093/LTC1094: 2.5mA Max, 1mA Typ
®
1091/LTC1092/LTC1093/LTC1094 10-bit data
APPLICATION
1
2
3
4
CS
CH0
CH1
GND
U
LTC1091
(V
D
REF
CLK
V
OUT
D
CC
IN
)
8
7
6
5
5V
U
SERIAL DATA LINK
4.7 F
APPLICATIONS INFORMATION
Serial I/O Data Acquisition Systems
FOR 8051 CODE SEE
P1.4
P1.3
P1.2
SECTION
(e.g., 8051)
MPU
1-, 2-, 6- and 8-Channel, 10-Bit
and-holds. On-chip serial ports allow efficient data trans-
fer to a wide range of microprocessors and microcontrol-
lers. These circuits can provide a complete data acquisi-
tion system in ratiometric applications or can be used with
an external reference in others.
The high impedance analog inputs and the ability to
operate with reduced spans (below 1V full scale) allow
direct connection to sensors and transducers in many
applications, eliminating the need for gain stages.
An efficient serial port communicates without external
hardware to most MPU serial ports and all MPU parallel
I/O ports allowing eight channels of data to be transmitted
over as few as three wires. This, coupled with low power
consumption, makes remote location possible and facili-
tates transmitting data through isolation barriers.
Temperature drift of offset, linearity and full-scale error
are all extremely low (1ppm/ C typically) allowing all
grades to be specified with offset and linearity errors of
grade devices are specified with full-scale error and total
unadjusted error (including the effects of offset, linearity
and full-scale errors) of 1LSB maximum over tempera-
ture. The lower grade has a full-scale specification of
less critical.
0.5LSB maximum over temperature. In addition, the A
2LSB for applications where full scale is adjustable or
, LTC and LT are registered trademarks of Linear Technology Corporation.
1091 TA01
1.25
1.00
0.75
0.50
0.25
0
0
LTC1093/LTC1094
LTC1091/LTC1092
V
CC
= 5V
1
REFERENCE VOLTAGE (V)
2
3
4
1091 TA02
5
1

Related parts for LTC1091CN8#PBF

LTC1091CN8#PBF Summary of contents

Page 1

... The lower grade has a full-scale specification of 2LSB for applications where full scale is adjustable or less critical. , LTC and LT are registered trademarks of Linear Technology Corporation. 4.7 F MPU (e.g., 8051) P1.4 P1 ...

Page 2

LTC1091/LTC1092 LTC1093/LTC1094 BSOLUTE Supply Voltage ( GND – Negative Supply Voltage (V ) .................... – GND Voltage Analog Reference and LTC1091/2 CS – Inputs ................................. (V ...

Page 3

RECO E DED OPERATI G CO DITIO S SYMBOL PARAMETER V Supply Voltage CC – V Negative Supply Voltage f Clock Frequency CLK t Total Cycle Time CYC t Hold Time, D Alter SCLK hDI IN t ...

Page 4

LTC1091/LTC1092 LTC1093/LTC1094 AC CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are T SYMBOL PARAMETER t Analog Input Sample Time SMPL t Conversion Time CONV t Delay Time, CLK to D Data Valid dDO ...

Page 5

W U TYPICAL PERFOR A Change in Offset Error vs Temperature 0 REF f = 500kHz CLK 0.5 0.4 0.3 0.2 0.1 0 –50 – 100 125 AMBIENT TEMPERATURE ( ...

Page 6

LTC1091/LTC1092 LTC1093/LTC1094 W U TYPICAL PERFOR A LTC1091/LTC1092/LTC1093/LTC1094 Maximum Clock Rate vs Source Resistance 1. 1.00 0.75 0.50 R SOURCE “+” OR “–” INPUT 100 1k ...

Page 7

W U TYPICAL PERFOR A LTC1092/LTC1093/LTC1094 Unadjusted Offset Error vs Reference Voltage 1mV 0.5mV OS 0 0.1 0 REFERENCE ...

Page 8

LTC1091/LTC1092 LTC1093/LTC1094 W U TYPICAL PERFOR A LTC1092/LTC1093/LTC1094 Reference Current vs Temperature 0.6 0.5 0.4 0.3 0.2 0.1 0 –50 – AMBIENT TEMPERATURE ( CTIO S LTC1091/LTC1092 CS (Pin 1): Chip ...

Page 9

CTIO S V (Pin 11)(LTC1093): Reference Input. The reference REF input must be kept free of noise with respect to AGND. + – REF , REF (Pins 13, 14 )(LTC1094): Reference Input. The reference input ...

Page 10

LTC1091/LTC1092 LTC1093/LTC1094 TEST CIRCUITS On- and Off-Channel Leakage Current OFF A POLARITY Voltage Waveforms for D Delay Time, t OUT CLK 0.8V t dDO D OUT Load Circuit for t dis TEST POINT 3k D ...

Page 11

TEST CIRCUITS CS CLK D OUT LTC1093/LTC1094 CS D START IN 1 CLK D OUT PPLICATI S I FOR ATIO A The LTC1091/LTC1092/LTC1093/LTC1094 are data acquisiton components that contain the following func- tional blocks: 1. 10-Bit Successive ...

Page 12

LTC1091/LTC1092 LTC1093/LTC1094 PPLICATI FOR ATIO OUT SHIFT MUX ADDRESS IN 1 NULL BIT SHIFT A/D CONVERSION RESULT OUT the first CLK pulse enables D . After one null ...

Page 13

PPLICATI S I FOR ATIO A CS CLK Hi-Z D OUT B9 t SMPL t CONV Example: Differential Inputs (CH4 MSB-First Data (MSBF = 1) CS CLK SEL1 START UNI D IN MSBF SGL/ ODD/ SEL0 Hi-Z ...

Page 14

LTC1091/LTC1092 LTC1093/LTC1094 PPLICATI S I FOR ATIO Start Bit The first “logical one” clocked into the D goes low is the start bit. The start bit initiates the data transfer. The LTC1091/LTC1093/LTC1094 will ignore all leading ...

Page 15

PPLICATI S I FOR ATIO MSB-First/LSB-First (MSBF) The output data of the LTC1091/LTC1093/LTC1094 is programmed for MSB-first or LSB-first sequence using the MSBF bit. When the MSBF bit is a logical one, data will appear on ...

Page 16

LTC1091/LTC1092 LTC1093/LTC1094 PPLICATI FOR ATIO 3. Accommodating Microprocessors with Different Word Lengths The LTC1091/LTC1093/LTC1094 will fill zeros indefinitely after the transmitted data until CS is brought high. At that time the D line is ...

Page 17

PPLICATI S I FOR ATIO CS CLK DATA ( OUT START DATA LINE AND SENDS MUX ADDRESS TO LTC1091 Figure 2. LTC1091 Operation with D 5. Microprocessor Interfaces The LTC1091/LTC1092/LTC1093/LTC1094 can interface directly ...

Page 18

LTC1091/LTC1092 LTC1093/LTC1094 PPLICATI S I FOR ATIO Motorola SPI (MC68HC05C4, MC68HC11) The MC68HC05C4 has been chosen as an example of an MPU with a dedicated serial port. This MPU transfers data MSB first and in 8-bit ...

Page 19

PPLICATI FOR ATIO Interfacing to the Parallel Port of the Intel 8051 Family The Intel 8051 has been chosen to demonstrate the interface between the LTC1091 and parallel port micro- processors. Normally, the CS, ...

Page 20

LTC1091/LTC1092 LTC1093/LTC1094 PPLICATI S I FOR ATIO 2 OUTPUT PORT Figure 3. Several LTC1094s Sharing One 3-Wire Serial Interface Sharing the Serial Interface The LTC1094 can share the same 2- or 3-wire serial interface with other ...

Page 21

PPLICATI S I FOR ATIO 3. Analog Inputs Because of the capacitive redistribution A/D conversion techniques used, the analog inputs of the LTC1091/ LTC1092/LTC1093/LTC1094 have capacitive switching input current spikes. These current spikes settle quickly and ...

Page 22

LTC1091/LTC1092 LTC1093/LTC1094 PPLICATI S I FOR ATIO “–” Input Settling At the end of the sample phase the input capacitor switches to the “–” input and the conversion starts (see Figure 8). During the conversion, the ...

Page 23

PPLICATI S I FOR ATIO A 5mV/DIV 1 s/DIV Figure 9. Adequate Settling of Op Amp Driving Analog Input 5mV/DIV 20 s/DIV Figure 10. Poor Op Amp Settling Can Cause A/D Errors RC Input Filtering It is ...

Page 24

LTC1091/LTC1092 LTC1093/LTC1094 PPLICATI FOR ATIO Differential Inputs With differential inputs, the A/D no longer converts just a single voltage but rather the difference between two volt- ages. In this case, the voltage on the ...

Page 25

PPLICATI S I FOR ATIO 0.5mV/DIV 1 s/DIV Figure 14. Poor Reference Settling Can Cause A/D Errors 6. Reduced Reference Operation The minimum reference voltage of the LTC1091 is limited to 4.5V because the V supply ...

Page 26

LTC1091/LTC1092 LTC1093/LTC1094 O U TYPICAL A PPLICATI 500 C Furnace Exhaust Gas Temperature Monitor with Low Supply Detection – LT1025A J TYPE GND COMMON 0 0.1% ...

Page 27

O U TYPICAL A PPLICATI –40 C 5000 226 100 C 0.25 C Accurate Thermistor Based Temperature Measurement System 2N3904 10k 15k 10% 10% LTC1094 YSI 44201 CH0 DV ...

Page 28

LTC1091/LTC1092 LTC1093/LTC1094 PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH ...

Page 29

PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) U ...

Page 30

LTC1091/LTC1092 LTC1093/LTC1094 PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH ...

Page 31

... DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD 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 represen- tation that the interconnection of circuits as described herein will not infringe on existing patent rights. ...

Page 32

... Serial I/O, 1.5mA Supply Current Pin Compatible Upgrades to LTC1091/LTC1092 Pin Compatible Upgrades to LTC1093/LTC1094 5V 10k 2N3906 C1 150 5V 10k SCK 150 5V 10k C0 150 TO 68HC05** 5V 10k MOSI 150 5.1k 51k MISO 5V LT1091-4 TA06 1091fa LT/TP 1099 2K REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1988 ...

Related keywords