LTC2668I Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LTC2668I

16-Channel 16-/12-Bit ±10V VOUT SoftSpan DACs with 10ppm/°C Max Reference

Linear Technology 

LTC2668

Typical Performance Characteristics TA = 25°C, unless otherwise noted.

LTC2668-16/LTC2668-12

Headroom to V+ Rail

vs Output Current

4.7

4.5

4.3

4.1

3.9

3.7

3.5

0

0V TO 5V RANGE; V+ = 4.5V, V– = GND

±5V RANGE; V+/V– = ±4.5V

CODE: FULL-SCALE

–2

–4

–6

–8 –10

OUTPUT CURRENT SOURCING (mA)

2668 G19

Unipolar Offset

vs Reference Input

2.0

0V TO 5V RANGE

1.5

16 CHANNELS

1.0

0.5

0

–1.0

–1.5

–2.0

0.5 1 1.5 2 2.5 3 3.5

VREF (V)

2668 G20

Unipolar Offset

vs Reference Input

4

0V TO 10V RANGE

3

16 CHANNELS

2

1

0

–1

–2

–3

–4

0.5 1 1.5 2 2.5 3 3.5

VREF (V)

2668 G20

AVP Supply Current

vs Bipolar Output Voltage

12

ALL CHANNELS AT SAME CODE

OUTPUTS UNLOADED

10

8

6

4

2

±10 RANGE

±5V RANGE

±2.5V RANGE

0

–10 –7.5 –5 –2.5 0 2.5 5 7.5 10

VOUT (V)

2668 G22

AVP Shutdown Current vs AVP

1.0

0.8

0.6

0.4

0.2

0

4.4 4.6 4.8

5

5.2 5.4

VAVP (V)

2668 G23

V+/V– Shutdown Current

vs Symmetric Supplies

40

30

I(V+)SHUTDOWN

20

10

0

–10

–20

I(V–)SHUTDOWN

–30

–40

4

6

8 10 12

V+/V– (V)

14 16

2668 G24

IOVP Supply Current

vs Logic Voltage

0.6

0.5

OVP = 5V

0.4

0.3

0.2

0.1

OVP = 3.3V

0

OVP = 1.8V

–0.1

0

1

2

3

4

INPUT LOGIC VOLTAGE (V)

AVP = 5V

SCK, SDI, CS/LD, CLR, LDAC,

TGP TIED TOGETHER

5

2668 G25

10

Hardware CLR to Mid-Scale

±10V RANGE

VOUT

5V/DIV

FROM FULL-SCALE

FROM ZERO-SCALE

CLR

2µs/DIV

2668 G26

For more information www.linear.com/LTC2668

Hardware CLR to Zero-Scale

VOUT

1V/DIV

0V TO 5V RANGE

CLR

2µs/DIV

2668 G27

2668fa

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