LTC1609I Просмотр технического описания (PDF) - Linear Technology

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LTC1609I

16-Bit, 200ksps, Serial ADC with Multiple Input Ranges

Linear Technology 

LTC1609

POWER REQUIREMENTS The q indicates specifications which apply over the full operating temperature range,

otherwise specifications are at TA = 25°C. (Note 5)

SYMBOL

VDD

IDD

PDIS

PARAMETER

Positive Supply Voltage

Positive Supply Current

Power Dissipation

CONDITIONS

(Notes 9, 10)

PWRD = Low

PWRD = Low

PWRD = High

LTC1609/LTC1609A

MIN

TYP

MAX

4.75

5.25

q

13

20

65

100

50

UNITS

V

mA

mW

µW

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: All voltage values are with respect to ground with DGND, AGND1

and AGND2 wired together (unless otherwise noted).

Note 3: When these pin voltages are taken below ground or above VANA =

VDIG = VDD, they will be clamped by internal diodes. This product can

handle input currents of greater than 100mA below ground or above VDD

without latch-up.

Note 4: When these pin voltages are taken below ground, they will be

clamped by internal diodes. This product can handle input currents of

90mA below ground without latchup. These pins are not clamped to VDD.

Note 5: VDD = 5V, fSAMPLE = 200kHz, tr = tf = 5ns unless otherwise

specified.

Note 6: Linearity, offset and full-scale specifications apply for a VIN input

with respect to ground.

Note 7: Integral nonlinearity is defined as the deviation of a code from a

straight line passing through the actual end points of the transfer curve.

The deviation is measured from the center of the quantization band.

Note 8: Bipolar zero error is the offset voltage measured from – 0.5 LSB

when the output code flickers between 0000 0000 0000 0000 and 1111

1111 1111 1111. Unipolar zero error is the offset voltage measured from

0.5LSB when the output codes flickers between 0000. . .0000 and 0000. .

.0001.

Note 9: Guaranteed by design, not subject to test.

Note 10: Recommended operating conditions.

Note 11: With CS low the falling R/C edge starts a conversion. If R/C

returns high at a critical point during the conversion it can create small

errors. For best results ensure that R/C returns high within 1.2µs after the

start of the conversion.

Note 12: As measured with fixed 1% resistors shown in Figures 3a and

3b. Adjustable to zero with external potentiometer.

Note 13: Full-scale error is the worst-case of –FS or +FS untrimmed

deviation from ideal first and last code transitions, divided by the transition

voltage (not divided by the full-scale range) and includes the effect of

offset error. For unipolar input ranges full-scale error is the deviation of

the last code transition from ideal divided by the transiton voltage and

includes the effect of offset error.

Note 14: All specifications in dB are referred to a full-scale ±5V input.

Note 15: Full-power bandwidth is defined as full-scale input frequency at

which a signal-to-(noise + distortion) degrades to 60dB or 10 bits of

accuracy.

Note 16: Recovers to specified performance after (2 • FS) input

overvoltage.

Note 17: When data is shifted out during a conversion, with an external

data clock, complete the process within 1.2µs from the start of the

conversion (BUSY falling). This will help keep any external disturbances

from causing an error in the conversion result.

1609fa

5

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