LTC1661IMS8 Linear Technology, LTC1661IMS8 Datasheet

IC D/A CONV 10BIT MICRPWR 8-MSOP

LTC1661IMS8

Manufacturer Part Number
LTC1661IMS8
Description
IC D/A CONV 10BIT MICRPWR 8-MSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1661IMS8

Settling Time
30µs
Number Of Bits
10
Data Interface
Serial
Number Of Converters
2
Voltage Supply Source
Single Supply
Power Dissipation (max)
260µW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1661IMS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC1661IMS8
Manufacturer:
LT/凌特
Quantity:
20 000
Part Number:
LTC1661IMS8#TRPBF
Manufacturer:
LINEAR
Quantity:
10 169
Part Number:
LTC1661IMS8#TRPBF
Manufacturer:
LINEAR
Quantity:
4 825
Part Number:
LTC1661IMS8#TRPBF
Manufacturer:
LT
Quantity:
20 000
FEATURES
APPLICATIONS
BLOCK DIAGRAM
n
n
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n
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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.
V
OUT A
Tiny: Two 10-Bit DACs in an 8-Lead MSOP—
Half the Board Space of an SO-8
Micropower: 60µA per DAC
Sleep Mode: 1µA for Extended Battery Life
Rail-to-Rail Voltage Outputs Drive 1000pF
Wide 2.7V to 5.5V Supply Range
Double Buffered for Independent or Simultaneous
DAC Updates
Reference Range Includes Supply for Ratiometric
0V-to-V
Reference Input Has Constant Impedance over All
Codes (260kΩ Typ)—Eliminates External Buffers
3-Wire Serial Interface with Schmitt Trigger Inputs
Differential Nonlinearity: ≤±0.75LSB Max
Mobile Communications
Digitally Controlled Amplifiers and Attenuators
Portable Battery-Powered Instruments
Automatic Calibration for Manufacturing
Remote Industrial Devices
8
GND
10-BIT
DAC A
CC
7
CS/LD
Output
1
CONTROL
LOGIC
SCK
2
SHIFT REGISTER
ADDRESS
DECODER
DESCRIPTION
The LTC
able, 10-bit digital-to-analog converters (DACs) in a single
tiny MS8 package. Each buffered DAC draws just 60µA
total supply current, yet is capable of supplying DC output
currents in excess of 5mA and reliably driving capacitive
loads up to 1000pF . Sleep mode further reduces total
supply current to a negligible 1µA.
Linear Technology’s proprietary, inherently monotonic
voltage interpolation architecture provides excellent lin-
earity while allowing for an exceptionally small external
form factor. The double-buffered input logic provides
simultaneous update capability and can be used to write
to either DAC without interrupting sleep mode.
Ultralow supply current, power-saving sleep mode and
extremely compact size make the LTC1661 ideal for
battery-powered applications, while its straightforward
usability, high performance and wide supply range make
it an excellent choice as a general purpose converter.
For additional outputs and even greater board density,
please refer to the LTC1660 micropower octal DAC for
10-bit applications. For 8-bit applications, please consult
the LTC1665 micropower octal DAC.
10-BIT
DAC B
V
D
6
3
CC
IN
®
1661 integrates two accurate, serially address-
V
OUT B
REF
5
4
10-Bit DAC in MSOP
1661 BD
Micropower Dual
–0.20
–0.40
–0.60
–0.75
0.75
0.60
0.40
0.20
0
0
Differential Nonlinearity (DNL)
256
LTC1661
CODE
512
768
1661 G02
1661fa
1
1023

Related parts for LTC1661IMS8

LTC1661IMS8 Summary of contents

Page 1

... Digitally Controlled Amplifiers and Attenuators n Portable Battery-Powered Instruments n Automatic Calibration for Manufacturing n Remote Industrial Devices n 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. BLOCK DIAGRAM V GND OUT ...

Page 2

... JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC1661CMS8#PBF LTC1661CMS8#TRPBF LTC1661IMS8#PBF LTC1661IMS8#TRPBF LTC1661CN8#PBF LTC1661CN8#TRPBF LTC1661IN8#PBF LTC1661IN8#TRPBF Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER Reference Input Input Voltage Range Resistance Capacitance I Reference Current REF Power Supply Positive Supply Voltage Supply Current CC DC Performance Short-Circuit Current Low Short-Circuit Current ...

Page 4

LTC1661 TIMING CHARACTERISTICS range, otherwise specifications are at T SYMBOL PARAMETER V = 2. Valid to SCK Setup Valid to SCK Hold SCK High Time 3 t SCK ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity (INL) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 0 256 512 768 CODE 1661 G01 Minimum V vs Load Current OUT (Output Sinking) 1400 1200 CODE = 0 125°C ...

Page 6

LTC1661 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Logic Input Voltage 1.0 0.8 0.6 0.4 0 LOGIC INPUT VOLTAGE (V) PIN FUNCTIONS CS/LD (Pin 1): Serial Interface Chip Select/Load Input. When CS/LD is low, SCK is enabled ...

Page 7

DEFINITIONS Differential Nonlinearity (DNL): The difference between the measured change and the ideal 1LSB change for any two adjacent codes. The DNL error between any two codes is calculated as follows: ∆V – LSB OUT DNL = LSB where ∆V ...

Page 8

LTC1661 OPERATION Transfer Function The transfer function for the LTC1661 is:  k      OUT(DEAL) REF 1024 where k is the decimal equivalent of the binary DAC input code D9-D0 and V is ...

Page 9

OPERATION Table 2. DAC Control Functions CONTROL INPUT REGISTER STATUS Change Load DAC Load DAC ...

Page 10

LTC1661 OPERATION Voltage Outputs Each of the rail-to-rail output amplifiers contained in the LTC1661 can typically source or sink up to 5mA (V The outputs swing to within a few millivolts of either supply when unloaded and have an equivalent ...

Page 11

TYPICAL APPLICATIONS 5V 0.1µ DAC A 1 CS/LD LTC1661 SCK DAC B 5V 0.1µ DAC B 1 LTC1661 DAC A 7 Figure 3. Pin Driver V V LTC1258-4.1 ...

Page 12

LTC1661 PACKAGE DESCRIPTION 5.23 (.206) MIN 0.42 ± 0.038 (.0165 ± .0015) TYP RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) GAUGE PLANE 0.18 (.007) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, ...

Page 13

... Removed typical values from Timing Characteristics section 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 14

... OUT = 2.7V to 5.5V 2.5V CC OUT = 4.5V to 5.5V 4.095V CC OUT = 2.7V to 5.5V 2.5V CC OUT DAC. Output Swings from GND to OUT CC = 2.7V to 5.5V, Internal Reference, 60µA = 2.7V to 5.5V, Micropower, Rail-to-Rail Output LT 1110 REV A • PRINTED IN USA  LINEAR TECHNOLOGY CORPORA TION 1999 CC 1661fa ...

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