LTC2634CMSE-HMX8#TRPBF Linear Technology, LTC2634CMSE-HMX8#TRPBF Datasheet

IC DAC 8BIT QUAD 2.5V 10-MSOP

LTC2634CMSE-HMX8#TRPBF

Manufacturer Part Number
LTC2634CMSE-HMX8#TRPBF
Description
IC DAC 8BIT QUAD 2.5V 10-MSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC2634CMSE-HMX8#TRPBF

Settling Time
3.3µs
Number Of Bits
8
Data Interface
MICROWIRE™, Serial, SPI™
Number Of Converters
4
Voltage Supply Source
Single Supply
Power Dissipation (max)
1.8mW
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC2634CMSE-HMX8#TRPBFLTC2634CMSE-HMX8
Manufacturer:
LT
Quantity:
10 000
Features
applications
n
n
n
n
n
n
n
n
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n
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Block Diagram
Integrated Precision Reference
Maximum INL Error: ±2.5 LSB (LTC2634-12)
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 (LTC2634-L)
Ultralow Crosstalk Between DACs (2.4nV•s)
Low Power: 0.6mA at 3V
Power-On Reset to Zero-Scale/Mid-Scale
Double Buffered Data Latches
Tiny 16-Lead 3mm × 3mm QFN and 10-Lead
MSOP Packages
Mobile Communications
Process Control and Industrial Automation
Automatic Test Equipment
Portable Equipment
Automotive
2.5V Full-Scale 10ppm/°C (LTC2634-L)
4.096V Full-Scale 10ppm/°C (LTC2634-H)
( ) QFN PACKAGE ONLY
V
REF
GND
(REFLO)
V
V
CS/LD
SCK
(LDAC)
OUTA
OUTB
DAC A
DAC B
P-P
0.1Hz to 200KHz
CONTROL
LOGIC
32-BIT SHIFT REGISTER
DECODE
REFERENCE
INTERNAL
SWITCH
POWER-ON
DAC D
DAC C
RESET
V
REF
Description
The LTC
age output DACs with an integrated, high accuracy, low
drift 10ppm/°C reference in 16-lead QFN and 10-lead
MSOP packages. It has rail-to-rail output buffers and is
guaranteed monotonic. The LTC2634-L has a full-scale
output of 2.5V, and operates from a single 2.7V to 5.5V
supply. The LTC2634-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
full-scale output to the external reference voltage.
These DACs communicate via an SPI/MICROWIRE compat-
ible 3-wire serial interface which operates at clock rates
up to 50MHz. Serial data output (SDO), a hardware clear
(CLR), and an asynchronous DAC update (LDAC) capability
are available in the QFN package. The LTC2634 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, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark 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
(SDO)
(CLR)
OUTD
OUTC
REF
V
SDI
V
CC
REF
2634 BD
®
2634 is a family of quad 12-, 10- and 8-bit volt-
10ppm/°C Reference
Rail-to-Rail DACs with
Quad 12-/10-/8-Bit
–1
–2
2
1
0
0
V
INTERNAL REF
CC
Integral Nonlinearity
= 3V
1024
(LTC2634-LZ12)
CODE
2048
3072
LTC2634
2634 TA01
4095
2634fc


Related parts for LTC2634CMSE-HMX8#TRPBF

LTC2634CMSE-HMX8#TRPBF Summary of contents

Page 1

... L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark 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. ...

Page 2

LTC2634 aBsolute maximum ratings Supply Voltage (V ) ................................... –0. CS/LD, SCK, SDI, LDAC, CLR, SDO, REFLO.. –0. .................... –0.3V to Min (V OUTA OUTD REF .................................. –0.3V to Min (V Operating Temperature ...

Page 3

LTC2634 #TR Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go ...

Page 4

LTC2634 proDuct selection guiDe PART MARKING* V WITH INTERNAL FS PART NUMBER QFN MSOP REFERENCE LTC2634-LMI12 LDQX LTDRV 2.5V • (4095/4096) LTC2634-LMI10 LDRF LTDSC 2.5V • (1023/1024) LTC2634-LMI8 LDRN LTDSK 2.5V • (255/256) LTC2634-LMX12 LDQW LTDRT 2.5V • (4095/4096) LTC2634-LMX10 ...

Page 5

T LTC2634-LMI12/-LMI10/-LMI8/-LMX12/-LMX10/-LMX8/-LZ12/-LZ10/-LZ8 (V SYMBOL PARAMETER CONDITIONS DC Performance Resolution Monotonicity V = 3V, Internal Ref. (Note 4) CC DNL Differential Nonlinearity V = 3V, Internal Ref. (Note 4) CC INL Integral Nonlinearity ...

Page 6

LTC2634 electrical characteristics temperature range, otherwise specifications are at T LTC2634-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 Coefficient Output Impedance Capacitive Load ...

Page 7

T LTC2634-LMI12/-LMI10/-LMI8/-LMX12/-LMX10/-LMX8/-LZ12/-LZ10/-LZ8 (V SYMBOL PARAMETER t SDI Valid to SCK Setup 1 t SDI Valid to SCK Hold 2 t SCK High Time 3 t SCK Low Time 4 t CS/LD Pulse ...

Page 8

LTC2634 electrical characteristics temperature range, otherwise specifications are at T LTC2634-HMI12/-HMI10/-HMI8/-HMX12/-HMX10/-HMX8/-HZ12/-HZ10/-HZ8 (V SYMBOL PARAMETER CONDITIONS DC Performance Resolution Monotonicity V = 5V, Internal Ref. (Note 4) CC DNL Differential Nonlinearity V = 5V, Internal Ref. (Note 4) CC INL Integral ...

Page 9

T LTC2634-HMI12/-HMI10/-HMI8/-HMX12/-HMX10/-HMX8/-HZ12/-HZ10/-HZ8 (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 Coefficient Output Impedance Capacitive Load Driving ...

Page 10

LTC2634 electrical characteristics temperature range, otherwise specifications are at T LTC2634-HMI12/-HMI10/-HMI8/-HMX12/-HMX10/-HMX8/-HZ12/-HZ10/-HZ8 (V SYMBOL PARAMETER t SDI Valid to SCK Setup 1 t SDI Valid to SCK Hold 2 t SCK High Time 3 t SCK Low Time 4 t CS/LD ...

Page 11

T = 25°C, unless otherwise noted. LTC2634-L12 (Internal Reference Integral Nonlinearity (INL) 1 0.5 0 –0.5 –1.0 0 1024 2048 CODE INL vs Temperature 1 0.5 INL ...

Page 12

LTC2634 typical perFormance characteristics T = 25°C, unless otherwise noted. LTC2634-H12 (Internal Reference Integral Nonlinearity (INL) 1 0.5 0 –0.5 –1.0 0 1024 2048 CODE INL vs Temperature 1 INL ...

Page 13

LTC2634-10 Integral Nonlinearity (INL) 1 2.5V FS INTERNAL REF 0.5 0 –0.5 –1.0 0 256 512 CODE LTC2634-8 Integral Nonlinearity (INL) 0. 2.5V FS INTERNAL ...

Page 14

LTC2634 typical perFormance characteristics LTC2634 Large-Signal Response V OUT 0.5V/DIV 1/4 SCALE to 3/4 SCALE 2µs/DIV 2634 G22 Headroom at Rails vs Output Current 5.0 5V SOURCING 4.5 4.0 3.5 3V (LTC2634-L) SOURCING ...

Page 15

LTC2634 Mulitplying Bandwidth 2 0 –2 –4 –6 –8 –10 – – REF(DC 0.2V –16 REF(AC) P-P CODE = FULL-SCALE –18 1k 10k 100k FREQUENCY (Hz) 2636 G31 ...

Page 16

LTC2634 pin Functions (QFN/MSOP (Pins 1-2, 11-12/Pins 2-3, 8-9): DAC OUTA OUTD Analog Voltage Outputs. LDAC (Pin 3, QFN Only): Asynchronous DAC Update Pin. If CS/LD is high, a falling edge on LDAC immediately updates the DAC ...

Page 17

Block Diagram GND (REFLO) V OUTA DAC A V REF V OUTB DAC B CS/LD SCK (LDAC QFN PACKAGE ONLY INTERNAL SWITCH REFERENCE V REF DAC D DAC C CONTROL DECODE LOGIC POWER-ON 32-BIT SHIFT REGISTER RESET LTC2634 ...

Page 18

LTC2634 timing Diagrams SCK SDI CS/LD SDO LDAC  Figure 1a CS/ LDAC 2634 F01b Figure ...

Page 19

The LTC2634 is a family of quad voltage output DACs in 16-lead QFN and 10-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 ...

Page 20

LTC2634 operation of CS/LD. The rising edge of CS/LD ends the data transfer and causes the device to execute the command specified in the 24-bit input sequence. The complete sequence is shown in Figure 3a. The command (C3-C0) and address ...

Page 21

While the minimum input sequence is 24 bits, it may optionally be extended to 32 bits to accommodate micro- processors that have a minimum word width of 16 bits (2 bytes). To use the 32-bit width, 8 don’t care ...

Page 22

LTC2634 operation Power-Down Mode For power-constrained applications, power-down mode can be used to reduce the supply current whenever less than four DAC outputs are needed. When in power down, the buffer amplifiers, bias circuits, and integrated reference circuits are disabled, ...

Page 23

Rail-to-Rail Output Considerations In any rail-to-rail voltage output device, the output is limited to voltages within the supply range. Since the analog output of the DAC cannot go below ground, it may limit for the lowest codes as shown ...

Page 24

LTC2634 operation  2634fc ...

Page 25

OUTPUT VOLTAGE 0V NEGATIVE INPUT CODE OFFSET (4b) Figure 4. Effects of Rail-to-Rail Operation on a DAC Transfer Curve (Shown in 12 Bits) (4a) Overall Transfer Function (4b) Effect of Negative Offset for Codes Near Zero (4c) Effect of ...

Page 26

LTC2634 typical application  2634fc ...

Page 27

Description 3.50 0.05 1.45 0.05 (4 SIDES) 2.10 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 3.00 0.10 (4 SIDES) PIN 1 TOP MARK (NOTE 6) NOTE: 1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION (WEED-2) 2. DRAWING NOT ...

Page 28

LTC2634 package Description 1.88 0.102 (.074 .004) 5.23 (.206) MIN 0.305 0.038 (.0120 .0015) TYP RECOMMENDED SOLDER PAD LAYOUT DETAIL “A” 0.254 (.010) GAUGE PLANE DETAIL “A” 0.18 (.007) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. ...

Page 29

... Added Typical Application and replaced Related Parts list 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 30

... LTC6240 – 15V REF V V LTC2634MSE-LMI12 0.1µ LT1991 9 1 DAC A DAC D P1 REF DAC B DAC C –15V CS/LD 10 SCK GND SDI 2634 TA02 LT 0610 REV C • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 2009 0.1µ OUT OUT ±5V 5 0.1µF 2634fc ...

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