Linear Technology LTC2636-HZ12: 12-Bit Octal SPI DAC, req DC590 DC1466A-C DC1466A-C 数据表

LTC2636

1

2636fb

Octal 12-/10-/8-Bit SPI V

OUT

  

DACs with10ppm/°C Reference

The LTC

®

2636 is a family of octal 12-, 10-, and 8-bit 

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, LTM, Linear Technology and the Linear logo 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.

n

  Integrated Precision Reference

  2.5V Full-Scale 10ppm/°C (LTC2636-L)

  4.096V Full-Scale 10ppm/°C (LTC2636-H)

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  Maximum INL Error: 2.5LSB (LTC2636-12)

n

  Low Noise: 0.75mV

P-P

 0.1Hz to 200KHz

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  Guaranteed Monotonic Over –40°C to 125°C 

Temperature Range

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  Selectable Internal or External Reference

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  2.7V to 5.5V Supply Range (LTC2636-L)

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 Ultralow Crosstalk Between DACs (<2.4nV•s)

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  Low Power: 0.9mA at 3V (LTC2636-L)

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  Power-On-Reset to Zero-Scale/Mid-Scale

n

  Double-Buffered Data Latches

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  Tiny 14-Lead 4mm × 3mm DFN and 16-Lead MSOP 

Packages

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  Mobile Communications

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  Process Control and Industrial Automation

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  Automatic Test Equipment

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  Portable Equipment

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 Automotive

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  Optical Networking

2636 BD

GND

V

OUTA

V

OUTB

V

OUTC

V

OUTD

SCK

CS/LD

(LDAC)

REF

V

CC

V

OUTH

V

OUTG

V

OUTF

V

OUTE

SDI

(CLR)

INTERNAL REFERENCE

SWITCH

DAC A

CONTROL LOGIC

DECODE

POWER-ON RESET

V

REF

V

REF

V

REF

V

REF

V

REF

V

REF

V

REF

DAC B

DAC C

DAC D

DAC H

DAC G

DAC F

DAC E

REGISTER

32-BIT SHIFT REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

CODE

0

INL (LSB)

2

1

0

–1

–2

1024

3072

2636 TA01

4095

2048

V

CC

 = 3V

INTERNAL REF.