LTC2630-10 Linear Technology Corporation, LTC2630-10 Datasheet

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LTC2630-10

Manufacturer Part Number
LTC2630-10
Description
Ltc2630-10 - Single 10-bit Rail-to-rail Dacs With Integrated Reference In Sc70
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
APPLICATIONS
BLOCK DIAGRAM
Integrated Precision Reference
2.5V Full Scale 10ppm/°C (LTC2630-L)
4.096V Full Scale 10ppm/°C (LTC2630-H)
Maximum INL Error: 1 LSB (LTC2630A-12)
Low Noise: 0.7mV
Guaranteed Monotonic over Temperature
Selectable Internal Reference or Supply as Reference
2.7V to 5.5V Supply Range (LTC2630-L)
Low Power Operation: 180μA at 3V
Power Down to 1.8μA Maximum (C and I Grades)
Power-on Reset to Zero or Midscale Options
SPI Serial Interface
Double-Buffered Data Latches
Tiny 6-Lead SC70 Package
Mobile Communications
Process Control and Industrial Automation
Automatic Test Equipment
Portable Equipment
Automotive
CS/LD
SDI
SCK
REGISTER
24-BIT
SHIFT
REGISTER
P-P
INPUT
, 0.1Hz to 200kHz
DECODE LOGIC
CONTROL
REFERENCE
INTERNAL
REGISTER
DAC
RESISTOR
DIVIDER
DACREF
GND
DAC
V
CC
DESCRIPTION
The LTC
output DACs with an integrated, high-accuracy, low-drift
reference in a 6-lead SC70 package. It has a rail-to-rail
output buffer and is guaranteed monotonic.
The LTC2630-L has a full-scale output of 2.5V, and
operates from a single 2.7V to 5.5V supply. The
LTC2630-H has a full-scale output of 4.096V, and operates
from a 4.5V to 5.5V supply. Each DAC can also operate in
supply as reference mode, which sets the full-scale output
to the supply voltage.
The parts use a simple SPI/MICROWIRE™ compatible
3-wire serial interface which operates at clock rates up
to 50MHz.
The LTC2630 incorporates a power-on reset circuit. Op-
tions are available for reset to zero or reset to midscale
after power-up.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5396245, 5859606, 6891433 and 6937178.
Single 12-/10-/8-Bit Rail-to-
V
Rail DACs with Integrated
OUT
, LT , LTC and LTM are registered trademarks of Linear Technology Corporation.
2630 BD
®
2630 is a family of 12-, 10-, and 8-bit voltage-
Reference in SC70
–0.5
–1.0
1.0
0.5
Integral Nonlinearity (LTC2630A-LZ12)
0
0
V
V
CC
FS
= 2.5V
= 3V
1024
2048
CODE
LTC2630
3072
2630 TA03
4095
2630fb
1

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LTC2630-10 Summary of contents

Page 1

... The LTC2630-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2630-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. Each DAC can also operate in supply as reference mode, which sets the full-scale output to the supply voltage. ...

Page 2

... CS/LD, SCK, SDI .......................................... –0. ...................................–0.3V to min(V OUT Operating Temperature Range LTC2630C ................................................ 0°C to 70°C LTC2630I.............................................. –40°C to 85°C LTC2630H .......................................... –40°C to 125°C Maximum Junction Temperature........................... 150°C Storage Temperature Range ................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C ...

Page 3

... LTC2630-LM10 LCZF LTC2630-LM8 LCYW LTC2630-LZ12 LCSB LTC2630-LZ10 LCZD LTC2630-LZ8 LCYV LTC2630-HM12 LCWR LTC2630-HM10 LCZH LTC2630-HM8 LCYY LTC2630-HZ12 LCZC LTC2630-HZ10 LCZG LTC2630-HZ8 LCYX *The temperature grade is identifi label on the shipping container. POWER-ON RESET TO CODE 2.5V • (4095/4096) Mid-Scale 2.5V • (4095/4096) Zero 4.096V • ...

Page 4

... V = 2.7V to 5.5V, V unloaded unless otherwise specifi ed OUT = 2.5V) FS LTC2630-8 LTC2630-10 MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX ● ● ● ±0.5 ● ...

Page 5

... ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2630-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8, LTC2630A-LM12/-LZ12 (V SYMBOL PARAMETER AC Performance t Settling Time S Voltage Output Slew Rate Capacitive Load Driving Glitch Impulse e Output Voltage Noise Density n Output Voltage Noise TIMING CHARACTERISTICS range, otherwise specifi ...

Page 6

... The denotes the specifi cations which apply over the full operating ● = 25° 4.5V to 5.5V OUT = 4.096V) FS LTC2630-8 LTC2630-10 MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX ● ● ● ±0.5 ● ±0.05 ±0.5 ± ...

Page 7

... For 12 and linearity is defi ned from code 16 to code 4,095. L Note 3: Inferred from measurement at code 16 (LTC2630-12), code 4 (LTC2630-10) or code 1 (LTC2630-8). The denotes the specifi cations which apply over the full operating ● = 25° 4.5V to 5.5V, V ...

Page 8

... LTC2630 TYPICAL PERFORMANCE CHARACTERISTICS LTC2630-LM12/-LZ12 (V = 2.5V) FS Integral Nonlinearity (INL) 1 0.5 0 –0.5 –1.0 2048 0 1024 CODE INL vs Temperature 1 0.5 INL (POS) 0 INL (NEG) –0.5 –1.0 50 100 –50 – 125 TEMPERATURE (°C) 2630 G03 Settling to ±1LSB CS/LD 2V/DIV 3.6μs V OUT 1LSB/DIV ...

Page 9

... TYPICAL PERFORMANCE CHARACTERISTICS LTC2630-HM12/-HZ12 (V = 4.096V) FS Integral Nonlinearity (INL) 1 0.5 0 –0.5 –1.0 2048 0 1024 CODE INL vs Temperature 1 0.5 INL (POS) 0 INL (NEG) –0.5 –1.0 50 100 –50 – 125 TEMPERATURE (°C) 2630 G10 Settling to ±1LSB CS/LD 2V/DIV 4.0μs V OUT 1LSB/DIV 1/4 SCALE TO 3/4 SCALE STEP ...

Page 10

... LTC2630 TYPICAL PERFORMANCE CHARACTERISTICS LTC2630-10 Integral Nonlinearity (INL) 1 4.096V FS 0.5 0 –0.5 –1.0 512 0 256 CODE LTC2630-8 Integral Nonlinearity (INL) 1 2.5V FS 0.5 0 –0.5 –1.0 128 0 64 CODE LTC2630 Load Regulation (LTC2630- (LTC2630- (LTC2630- – ...

Page 11

... Large-Signal Response 0.5V/DIV 1/4 SCALE TO 3/4 SCALE 2μs/DIV 2630 G22 Headroom at Rails vs Output Current 5.0 5V SOURCING 4.5 4.0 3.5 3V (LTC2630-L) SOURCING 3.0 2.5 2.0 1.5 5V SINKING 1.0 0.5 3V (LTC2630-L) SINKING (mA) OUT 2630 G25 Exiting Power-Down to Midscale CS/LD 2V/DIV V OUT 0.5V/DIV 4μs/DIV Midscale-Glitch Impulse INTERNAL REF CS/LD 5V/DIV ...

Page 12

... SCK (Pin 2): Serial Interface Clock Input. CMOS and TTL compatible. SDI (Pin 3): Serial Interface Data Input. Data on SDI is clocked into the DAC on the rising edge of SCK. The LTC2630 accepts input word lengths of either bits. BLOCK DIAGRAM SDI 24-BIT SCK ...

Page 13

... CS/LD OPERATION The LTC2630 is a family of single voltage output DACs in 6-lead SC70 packages. Each DAC can operate rail-to-rail referenced to the input supply, or with its full-scale volt- age set by an integrated reference. Twelve combinations of accuracy (12-, 10-, and 8-bit), power-on reset value (zero or midscale), and full-scale voltage (2 ...

Page 14

... LTC2630 OPERATION INPUT WORD (LTC2630-12) COMMAND 4 DON'T-CARE BITS INPUT WORD (LTC2630-10) COMMAND 4 DON'T-CARE BITS INPUT WORD (LTC2630-8) COMMAND 4 DON'T-CARE BITS Serial Interface The CS/LD input is level triggered. When this input is taken low, it acts as a chip-select signal, enabling the SDI and SCK buffers and the input shift register ...

Page 15

... The resistance from the LTC2630 GND pin to the ground plane should be as low as possible. Resistance here will add directly to the effective DC output impedance of the device (typically 0.1Ω ...

Page 16

... DON’T-CARE BITS Figure 3b. 32-Bit Load Sequence LTC2630-12 SDI Data Word: 12-Bit Input Code + 4 Don’t-Care Bits (Shown); LTC2630-10 SDI Data Word: 10-Bit Input Code + 6 Don’t-Care Bits; LTC2630-8 SDI Data Word: 8-Bit Input Code + 8 Don’t-Care Bits 16 additional current through Q1 ...

Page 17

... OPERATION LTC2630 2630fb 17 ...

Page 18

... LTC2630 TYPICAL APPLICATION 12-Bit, 2.7V to 5.5V Single Supply, Voltage Output DAC 18 2.7V TO 5.5V 0.1μ SDI OUTPUT μP LTC2630-LZ12 SCK 2.5V OR OUT CS/LD GND CC 2630 TA01 2630fb ...

Page 19

... SC6 Package 6-Lead Plastic SC70 (Reference LTC DWG # 05-08-1638 Rev B) 0.65 REF 1.00 REF 1.15 – 1.35 1.80 – 2.40 (NOTE 4) 0.65 BSC 0.80 – 1.00 1.00 MAX 0.10 – 0.18 (NOTE 3) LTC2630 1.80 – 2.20 (NOTE 4) INDEX AREA (NOTE 6) PIN 1 0.15 – 0.30 6 PLCS (NOTE 3) 0.00 – 0.10 REF SC6 SC70 1205 REV B 2630fb 19 ...

Page 20

... Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● R OFFSET 374k 0.1% + 1μF R GAIN V CC 76.8k SDI FROM LTC2630-HZ 0.1% OPTO- V SCK OUT ISOLATED INPUTS CS/LD 3.01k 5V 10k SDI SCK CS/LD COMMENTS DACs in 16-Pin Narrow SSOP V = 2.7V to 5.5V, Micropower, Rail-to-Rail Output OUT ...

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