LTC1594_1 datasheet(6/24 Pages) LINER | 4- and 8-Channel, Micropower Sampling 12-Bit Serial I/O A/D Converters

6 page

LTC1594/LTC1598

15948fb

TYPICAL PERFORMANCE CHARACTERISTICS

Intermodulation Distortion

FREQUENCY (kHz)

–60

–40

1594/98 G15

–80

–100

–120

–140

–20

TA = 25°C

VCC = VREF = 5V

f1 = 5kHz

f2 = 6kHz

fSMPL = 12.5kHz

Attenuation vs Input Frequency

4096 Point FFT Plot

FREQUENCY (kHz)

–60

–40

1594/98 G14

–80

–100

–120

–140

–20

TA = 25°C

VCC = VREF = 5V

fIN = 5kHz

fCLK = 320kHz

fSMPL = 12.5kHz

Power Supply Feedthrough

vs Ripple Frequency

Maximum Clock Frequency

vs Source Resistance

INPUT FREQUENCY (kHz)

110

100

1000

10000

1594/98 G13

TA = 25°C

VCC = VREF = 5V

fSMPL = 16.8kHz

RIPPLE FREQUENCY (kHz)

–50

100

1000

10000

1594/98 G16

–100

TA = 25°C

VCC = 5V (VRIPPLE = 20mV)

VREF = 5V

fCLK = 320kHz

SOURCE RESISTANCE (k

Ω)

0.1

120

180

240

360

110

1594/98 G17

300

+ INPUT

COM

RSOURCE

–

VIN

TA = 25°C

VCC = VREF = 5V

Sample-and-Hold Acquisition Time

vs Source Resistance

SOURCE RESISTANCE (

Ω)

100

1000

1594/98 G18

0.1

10000

100

1000

10000

TA = 25°C

VCC = VREF = 5V

+ INPUT

COM

RSOURCE

VIN

Input Channel Leakage Current

vs Temperature

TEMPERATURE (

°C)

–60

1000

100

0.1

0.01

100

1594/98 G20

–20

140

–40

120

VCC = 5V

VREF = 5V

ON CHANNEL

OFF CHANNEL

Minimum Clock Frequency for

0.1LSB Error vs Temperature

TEMPERATURE (

°C)

–55

160

240

1594/98 G19

–35

–15

320

VCC = VREF = 5V

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