ltc2636-lz8 Linear Technology Corporation, ltc2636-lz8 Datasheet

no-image

ltc2636-lz8

Manufacturer Part Number
ltc2636-lz8
Description
Octal 12-/10-/8-bit Spi Vout Dacs With10ppm/?c Referenc
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
APPLICATIONS
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
BLOCK DIAGRAM
(LDAC)
V
V
V
CS/LD
V
OUTB
OUTC
OUTD
OUTA
GND
SCK
Integrated Precision Reference
2.5V Full-Scale 10ppm/°C (LTC2636-L)
4.096V Full-Scale 10ppm/°C (LTC2636-H)
Maximum INL Error: 2.5LSB (LTC2636-12)
Low Noise: 0.75mV
Guaranteed Monotonic Over –40°C to 125°C
Temperature Range
Selectable Internal or External Reference
2.7V to 5.5V Supply Range (LTC2636-L)
Ultralow Crosstalk Between DACs (<2.4nV•s)
Low Power: 0.9mA at 3V (LTC2636-L)
Power-On-Reset to Zero-Scale/Mid-Scale
Double-Buffered Data Latches
Tiny 14-Lead 4mm × 3mm DFN and 16-Lead MSOP
Packages
Mobile Communications
Process Control and Industrial Automation
Automatic Test Equipment
Portable Equipment
Automotive
Optical Networking
V
V
V
REF
REF
REF
DAC D
DAC A
DAC B
DAC C
P-P
CONTROL LOGIC
0.1Hz to 200KHz
INTERNAL REFERENCE
( ) MSOP PACKAGE ONLY
32-BIT SHIFT REGISTER
DECODE
DACs with10ppm/°C Reference
POWER-ON RESET
SWITCH
DAC H
DAC G
DAC F
DAC E
V
REF
Octal 12-/10-/8-Bit SPI V
DESCRIPTION
The LTC
voltage-output DACs with an integrated, high-accuracy,
low-drift 10ppm/°C reference in 14-lead DFN and 16-lead
MSOP packages. It has a rail-to-rail output buffer and is
guaranteed monotonic. The LTC2636-L has a full-scale
output of 2.5V, and operates from a single 2.7V to 5.5V
supply. The LTC2636-H has a full-scale output of 4.096V,
and operates from a 4.5V to 5.5V supply. Each DAC can
also operate with an external reference, which sets the DAC
full-scale output to the external reference voltage.
These DACs communicate via an SPI/MICROWIRE-com-
patible 3-wire serial interface which operates at clock rates
up to 50MHz. Hardware clear (CLR) and asynchronous
DAC update (LDAC) pins are available in the MSOP pack-
age. The LTC2636 incorporates a power-on reset circuit.
Options are available for reset to zero-scale or reset to
mid-scale in internal reference mode, or reset to mid-scale
in external reference mode after power-up.
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
5396245, 5859606, 6891433, 6937178, 7414561.
V
V
V
2636 BD
REF
REF
REF
REF
V
V
V
V
V
SDI
(CLR)
CC
OUTH
OUTG
OUTF
OUTE
®
2636 is a family of octal 12-, 10-, and 8-bit
–1
–2
2
1
0
0
12-Bit Integral Nonlinearity
V
INTERNAL REF .
CC
= 3V
1024
(LTC2636-LZ12)
CODE
2048
LTC2636
3072
2636 TA01
4095
OUT
1
2636f

Related parts for ltc2636-lz8

ltc2636-lz8 Summary of contents

Page 1

... MSOP packages. It has a rail-to-rail output buffer and is guaranteed monotonic. The LTC2636-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2636-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. Each DAC can also operate with an external reference, which sets the DAC full-scale output to the external reference voltage ...

Page 2

... CS/LD, SCK, SDI, LDAC, CLR....................... –0. A–V H ..................–0.3V to Min(V OUT OUT REF ....................................–0.3V to Min(V Operating Temperature Range LTC2636C ................................................ 0°C to 70°C LTC2636I.............................................. –40°C to 85°C LTC2636H (Note 3) ............................ –40°C to 125°C PIN CONFIGURATION TOP VIEW OUT ...

Page 3

... ORDER INFORMATION LTC2636 C DE – #TR Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: PBF LEAD FREE DESIGNATOR TAPE AND REEL ...

Page 4

... LMX10 6LMX10 2.5V•(1023/1024) LTC2636-LMX8 6LMX8 36LMX8 2.5V•(255/256) LTC2636-LZ12 6LZ12 36LZ12 2.5V•(4095/4096) LTC2636-LZ10 6LZ10 36LZ10 2.5V•(1023/1024) LTC2636-LZ8 36LZ8 636LZ8 2.5V•(255/256) LTC2636-HMI12 HMI12 6HMI12 4.096V•(4095/4096) LTC2636-HMI10 HMI10 6HMI10 4.096V•(1023/1024) LTC2636-HMI8 6HMI8 36HMI8 4.096V•(255/256) ...

Page 5

... ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2636-LMI12/-LMI10/-LMI8/-LMX12/-LMX10/-LMX8/-LZ12/-LZ10/-LZ8 (V SYMBOL PARAMETER CONDITIONS DC Performance Resolution Monotonicity V = 3V, Internal Reference (Note 4) CC DNL Differential Nonlinearity V = 3V, Internal Reference (Note 4) CC INL Integral Nonlinearity ...

Page 6

... LTC2636 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2636-LMI12/-LMI10/-LMI8/-LMX12/-LMX10/-LMX8/-LZ12/-LZ10/-LZ8 (V SYMBOL PARAMETER Reference Input V Input Voltage Range REF Resistance Capacitance I Reference Current, Power-Down Mode REF Reference Output Output Voltage Reference Temperature Coeffi cient ...

Page 7

... TIMING CHARACTERISTICS range, otherwise specifi cations are LTC2636-LMI12/-LMI10/-LMI8/-LMX12/-LMX10/-LMX8/-LZ12/-LZ10/-LZ8 (V SYMBOL PARAMETER t1 SDI Valid to SCK Setup t2 SDI Valid to SCK Hold t3 SCK High Time t4 SCK Low Time CS/LD Pulse Width t5 LSB SCK High to CS/LD High t6 CS/LD Low to SCK High ...

Page 8

... LTC2636 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2636-HMI12/-HMI10/-HMI8/-HMX12/-HMX10/-HMX8/-HZ12/-HZ10/-HZ8 (V SYMBOL PARAMETER V DAC Output Span OUT PSR Power Supply Rejection I Short Circuit Output Current (Note 6) SC Sinking Sourcing Power Supply V Positive Supply Voltage ...

Page 9

... FS CONDITIONS 50% Duty Cycle Note 5: Inferred from measurement at code 16 (LTC2636-12), code 4 (LTC2636-10) or code 1 (LTC2636-8), and at full-scale. Note 6: This IC includes current limiting that is intended to protect the device during momentary overload conditions. Junction temperature can exceed the rated maximum during current limiting. Continuous operation above the specifi ...

Page 10

... LTC2636 TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, unless otherwise noted. LTC2636-L12 (Internal Reference Integral Nonlinearity (INL) 1 0.5 0 –0.5 –1.0 0 1024 2048 CODE INL vs Temperature 1 INL (POS) 0.5 0 INL (NEG) –0.5 –1.0 –50 – 100 125 TEMPERATURE (°C) 2636 G03 Settling to ± ...

Page 11

... TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, unless otherwise noted. LTC2636-H12 (Internal Reference Integral Nonlinearity (INL) 1 0.5 0 –0.5 –1.0 0 1024 2048 CODE INL vs Temperature 1 INL (POS) 0.5 0 INL (NEG) –0.5 –1.0 –50 – 100 125 TEMPERATURE (°C) 2636 G10 Settling to ± ...

Page 12

... 2.5V FS INTERNAL REF . 0.25 0 –0.25 –0. 128 CODE LTC2636 Load Regulation (LTC2636- (LTC2636- (LTC2636- –2 –4 –6 INTERNAL REF. –8 CODE = MIDSCALE –10 –30 –20 – (mA) OUT 2636 G19 12 Differential Nonlinearity (DNL) 1 ...

Page 13

... Large-Signal Response V OUT 0.5V/DIV 1/4 SCALE to 3/4 SCALE 2μs/DIV 2636 G22 Headroom at Rails vs Output Current 5.0 5V SOURCING 4.5 4.0 3.5 3V (LTC2636-L) SOURCING 3.0 2.5 2.0 1.5 5V SINKING 1.0 3V (LTC2636-L) SINKING 0 (mA) OUT 2636 G25 Supply Current vs Logic Voltage 1.5 SWEEP SCK, SDI, CS/LD BETWEEN 0V AND V CC 1.4 1 ...

Page 14

... G31 0.1Hz to 10Hz Voltage Noise V CC CODE = MIDSCALE INTERNAL REF . 10μV/DIV 3.5 4 4.5 5 5.5 2636 G33 Gain Error vs Temperature 1.0 0.5 0 –0.5 LTC2636-H12 2.4nV•s TYP C = 0.1μF REF –1.0 –50 –25 2636 G35 T = 25°C, unless otherwise noted LTC2636-H LTC2636-L 1k 10k ...

Page 15

... SCK (Pin 7/8): Serial Interface Clock Input. CMOS and TTL compatible. SDI (Pin 8/9): Serial Interface Data Input. Data on SDI is clocked into the DAC on the rising edge of SCK. The LTC2636 accepts input word lengths of either bits. REF (Pin 9/11): Reference Voltage Input or Output. When External Reference mode is selected, REF is an input (1V ≤ ...

Page 16

... LTC2636 BLOCK DIAGRAM GND V OUTA V REF V OUTB V REF V OUTC V REF V OUTD CS/LD SCK (LDAC) TIMING DIAGRAMS SCK SDI t 5 CS/LD LDAC 16 INTERNAL REFERENCE DAC A DAC B DAC C DAC D CONTROL LOGIC DECODE 32-BIT SHIFT REGISTER ( ) MSOP PACKAGE ONLY Figure 1a ...

Page 17

... OPERATION The LTC2636 is a family of octal voltage output DACs in 14-lead DFN and 16-lead MSOP packages. Each DAC can operate rail-to-rail using an external reference, or with its full-scale voltage set by an integrated reference. Eighteen combinations of accuracy (12-, 10-, and 8-bit), power-on reset value (zero-scale, mid-scale in internal reference mode, or mid-scale in external reference mode), and full-scale voltage (2 ...

Page 18

... SDI and SCK buffers and the input shift register. Data (SDI input) is transferred into the LTC2636 on the next 24 rising SCK edges. The 4-bit command, C3-C0, is loaded fi rst; then the 4-bit DAC address, A3-A0; and fi nally the 16-bit data word ...

Page 19

... OPERATION LTC2636 2636f 19 ...

Page 20

... LDAC pin) that powers up the DACs will also power up the integrated reference. Voltage Outputs The LTC2636’s integrated rail-to-rail amplifi ers have guar- anteed load regulation when sourcing or sinking up to 10mA at 5V, and 5mA at 3V. Load regulation is a measure of the amplifi er’s ability to maintain the rated voltage accuracy over a wide range of load current ...

Page 21

... INPUT CODE (a) the LTC2636 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). Note that the LTC2636 is no more susceptible to this effect than any other parts of this type; on the con- ...

Page 22

... LTC2636 PACKAGE DESCRIPTION 3.60 ±0.05 2.20 ±0.05 1.70 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WGED-3) IN JEDEC PACKAGE OUTLINE MO-229 2. DRAWING NOT TO SCALE 3 ...

Page 23

... DETAIL “A” MAX SEATING PLANE 0.17 – 0.27 (.007 – .011) 0.50 TYP (.0197) BSC LTC2636 (NOTE 3) 0.280 ± 0.076 (.011 ± .003) 9 REF 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 0.86 (.034) REF 0.1016 ± 0.0508 (.004 ± .002) MSOP (MS16) 1107 REV Ø ...

Page 24

... LTC2636 TYPICAL APPLICATION LTC2636 DACs Adjust LTC2755-16 Offsets, Amplifi ed with LT1991 PGA to ± LTC2755-16 DD 15V 0.1μ OFSA R 64 IN1 0.1μ COM1 7 DAC A 1/2 LT1469 6 – 4 0.1μF 62 REFA –15V – OUTD DAC D + 30k – –15V OUTC DAC C + DAC B 30k – ...

Related keywords