LTC2471CDDPBF datasheet(11/20 Pages) LINER

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LTC2471/LTC2473

24713f

APPLICATIONS INFORMATION

Figure 6. Read Sequence Timing Diagram

the request and issues a NAK by leaving the SDA line HIGH.

If the conversion is complete, the LTC2471/LTC2473 issue

an ACK by pulling the SDA line LOW.

Following the ACK, the LTC2471/LTC2473 can output data.

The data output stream is 16 bits long and is shifted out

on the falling edges of SCL (see Figure 6).

The DATA INPUT/OUTPUT state is concluded once all 16

data bits have been read or after a STOP condition.

D13

D14

MSB

D15

SDA

SCL

7-BIT

ADDRESS

START BY

MASTER

LSB

ACK BY

MASTER

NACK BY

MASTER

SLEEP

DATA OUTPUT

CONVERSION

24713 F06

ACK BY

LTC2471/LTC2473

Table 1. LTC2471/LTC2473 Output Data Format

SINGLE ENDED INPUT VIN

(LTC2471)

DIFFERENTIAL INPUT VOLTAGE

VIN+ – VIN– (LTC2473)

D15

(MSB)

D14

D13

D12...D2

(LSB)

CORRESPONDING

DECIMAL VALUE

≥VREF

65535

VREF – 1LSB

65534

0.75 • VREF

0.5 • VREF

49152

0.75 • VREF – 1LSB

0.5 • VREF – 1LSB

49151

0.5 • VREF

32768

0.5 • VREF – 1LSB

–1LSB

32767

0.25 • VREF

–0.5 • VREF

16384

0.25 • VREF – 1LSB

–0.5 • VREF – 1LSB

16383

≤ –VREF

000

The LTC2473 (differential input) output code is given by

INT(32767.5 • (VIN+ – VIN–)/VREF + 32767.5. The ﬁrst bit

output by the LTC2473, D15, is the MSB, which is 1 for

VIN+ ≥ VIN– and 0 for VIN+ < VIN–. This bit is followed by

successively less signiﬁcant bits (D14, D13, …) until the

LSB is output by the LTC2473, see Table 1.

The LTC2471 (single-ended input) output code is a direct

binary encoded result, see Table 1.

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