AD1671_15 datasheet(3/16 Pages) AD

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Giải thích chi tiết về linh kiện	Complete 12-Bit 1.25 MSPS Monolithic A/D Converter

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AD1671

(TMIN to TMAX with VCC = +5 V

5%, VLOGIC = +5 V

10%, VEE = –5 V

5%, fSAMPLE = 1 MSPS,

flNPUT = 1OO kHz, unless otherwise noted)

1

AC SPECIFICATIONS

AD1671J/A/S

AD1671K

Parameter

Min

Typ

Max

Min

Typ

Max

Units

SIGNAL-TO-NOISE PLUS DISTORTION RATIO

(S/N + D)

–0.5 dB Input

68

70

68

71

dB

–20 dB Input

50

51

dB

EFFECTIVE NUMBER OF BITS (ENOB)

11.2

Bits

TOTAL HARMONIC DISTORTION (THD)

–80

–75

–83

–75

dB

PEAK SPURIOUS OR PEAK HARMONIC COMPONENT

–80

–77

–81

–77

dB

SMALL SIGNAL BANDWIDTH

12

MHz

FULL POWER BANDWIDTH

2

MHz

INTERMODULATION DISTORTION (IMD)

2

2nd Order Products

–80

–75

–80

–75

dB

3rd Order Products

–85

–75

–85

–75

dB

NOTES

1f

IN amplitude = –0.5 dB (9.44 V p-p) bipolar mode full scale unless otherwise indicated. All measurements referred to a 0 dB ( ± 5 V) input signal, unless otherwise

indicated.

2f

A = 99 kHz, fB = 100 kHz with fSAMPLE = 1 MSPS.

Specifications subject to change without notice.

SWITCHING SPECIFICATIONS

Parameters

Symbol

Min

Typ

Max

Units

Conversion Time

tC

800

ns

Sample Rate

FS

1.25

MSPS

ENCODE Pulse Width High (Figure 1a)

tENC

20

50

ns

ENCODE Pulse Width Low (Figure 1b)

tENCL

20

ns

DAV Pulse Width

tDAV

150

300

ns

ENCODE Falling Edge Delay

tF

0ns

Start New Conversion Delay

tR

0ns

Data and OTR Delay from DAV Falling Edge

tDD

1

20

75

ns

Data and OTR Valid before DAV Rising Edge

tSS

2

20

75

ns

NOTES

1t

DD is measured from when the falling edge of DAV crosses 0.8 V to when the output crosses 0.4 V or 2.4 V with a 25 pF load capacitor on each output pin.

2t

SS is measured from when the outputs cross 0.4 V or 2.4 V to when the rising edge of DAV crosses 2.4 V with a 25 pF load capacitor on each output pin.

Specifications subject to change without notice.

(For all grades TMIN to TMAX with VCC = +5 V

5%, VLO61C = +5 V

10%,

VEE = –5 V

5%; VIL = 0.8 V, VIH = 2.0 V, VOL = 0.4 V and VOH = 2.4 V)

ENCODE

DAV

DATA 0 (PREVIOUS)

DATA 1

C

t

DAV

t

DD

t

SS

t

F

t

R

t

ENCL

BIT 1–12

MSB, OTR

Figure 1b. Encode Pulse LOW

ENCODE

DAV

DATA 0 (PREVIOUS)

DATA 1

ENC

t

C

t

DAV

t

DD

t

SS

t

R

t

BIT 1–12

MSB, OTR

Figure 1a. Encode Pulse HIGH

REV. B

–3–

Số phần tương tự - AD1671_15

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