LTC2604(2004) データシートの表示（PDF） - Linear Technology

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LTC2604
(Rev.:2004)

Quad 16-Bit Rail-to-Rail DACs in 16-Lead SSOP

Linear Technology 

LTC2604/LTC2614/LTC2624

WU

TI I G CHARACTERISTICS

The q denotes specifications which apply over the full operating temperature range, otherwise specifications

are at TA = 25°C. REF A = REF B = REF C = REF D = 4.096V (VCC = 5V), REF A = REF B = REF C = REF D = 2.048V (VCC = 2.5V),

REF LO = 0V, VOUT unloaded, unless otherwise noted.

SYMBOL PARAMETER

VCC = 2.5V to 5.5V

t1

SDI Valid to SCK Setup

t2

SDI Valid to SCK Hold

t3

SCK High Time

t4

SCK Low Time

t5

CS/LD Pulse Width

t6

LSB SCK High to CS/LD High

t7

CS/LD Low to SCK High

t8

SDO Propagation Delay from SCK Falling Edge

t9

CLR Pulse Width

t10

CS/LD High to SCK Positive Edge

SCK Frequency

CONDITIONS

CLOAD = 10pF

VCC = 4.5V to 5.5V

VCC = 2.5V to 5.5V

50% Duty Cycle

LTC2604/LTC2614/LTC2624

MIN

TYP

MAX UNITS

q4

q4

q9

q9

q 10

q7

q7

q

q

q 20

q7

q

ns

ns

ns

ns

ns

ns

ns

20

ns

45

ns

ns

ns

50

MHz

Note 1: Absolute maximum ratings are those values beyond which the life

of a device may be impaired.

Note 2: Linearity and monotonicity are defined from code kL to code

2N – 1, where N is the resolution and kL is given by kL = 0.016(2N/VREF),

rounded to the nearest whole code. For VREF = 4.096V and N = 16,

kL = 256, linearity is defined from code 256 to code 65,535.

Note 3: Digital inputs at 0V or VCC.

Note 4: DC crosstalk is measured with VCC = 5V and VREF = 4.096V, with

the measured DAC at midscale, unless otherwise noted.

Note 5: RL = 2kΩ to GND or VCC.

Note 6: Guaranteed by design and not production tested.

Note 7: Inferred from measurement at code 256 (LTC2604), code 64

(LTC2614) or code 16 (LTC2624), and at full scale.

Note 8: VCC = 5V, VREF = 4.096V. DAC is stepped 1/4 scale to 3/4 scale

and 3/4 scate to 1/4 scale. Load is 2k in parallel with 200pF to GND.

Note 9: VCC = 5V, VREF = 4.096V. DAC is stepped 1LSB between half scale

and half scale –1. Load is 2k in parallel with 200pF to GND.

TYPICAL PERFOR A CE CHARACTERISTICS (LTC2604/LTC2614/LTC2624)

Current Limiting

0.10

CODE = MIDSCALE

0.08

VREF = VCC = 5V

0.06

VREF = VCC = 3V

0.04

0.02

0

–0.02

–0.04

–0.06

VREF = VCC = 3V

VREF = VCC = 5V

–0.08

–0.10

–40 –30 –20 –10 0 10 20 30 40

IOUT (mA)

2604 G01

4

Load Regulation

1.0

CODE = MIDSCALE

0.8

0.6

0.4

0.2

0

VREF = VCC = 5V

–0.2

–0.4

–0.6

VREF = VCC = 3V

–0.8

–1.0

–35 –25 –15 –5 5 15

IOUT (mA)

25 35

2604 G02

Offset Error vs Temperature

3

2

1

0

–1

–2

–3

–50 –30 –10 10 30 50

TEMPERATURE (°C)

70 90

2604 G03

2604f

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