LTC1274 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1274

12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown

Linear Technology 

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LTC1274/LTC1277

U

U

DIGITAL I PUTS A D DIGITAL OUTPUTS (Note 5)

SYMBOL PARAMETER

CONDITIONS

IOZ

High-Z Output Leakage D11 to D0/8

VOUT = 0V to VDD, CS High

COZ

High-Z Output Capacitance D11 to D0/8 CS High (Note 10)

ISOURCE Output Source Current

VOUT = 0V

ISINK

Output Sink Current

VOUT = VDD

WU

POWER REQUIRE E TS (Note 5)

SYMBOL PARAMETER

CONDITIONS

VDD

VLOGIC

VSS

IDD

Positive Supply Voltage (Notes 11, 12)

Logic Supply (Notes 11,12)

Negative Supply Voltage (Note 11)

Positive Supply Current

Unipolar and Bipolar Mode

Unipolar and Bipolar Mode (LTC1277)

Bipolar Mode Only

fSAMPLE = 100ksps

NAP = 0V (LTC1277 Only)

SLEEP = 0V

ISS

Negative Supply Current

fSAMPLE = 100ksps, Bipolar Mode Only

SLEEP = 0V

PDISS Power Dissipation

fSAMPLE = 100ksps

NAP = 0V (LTC1277 Only)

SLEEP = 0V (Unipolar/Bipolar)

WU

TI I G CHARACTERISTICS (Note 5) See Figures 13 to 17.

SYMBOL

fSAMPLE(MAX)

tCONV

tACQ

t1

t2

t3

t4

t5

t6

t7

t8

t9

PARAMETER

Maximum Sampling Frequency

Conversion Time

Acquisition Time

CS↓ to RD↓ Setup Time

CS↓ to CONVST↓ Setup Time

NAP↑ to CONVST↓ Wake-Up Time

CONVST Low Time

CONVST↓ to BUSY↓ Delay

Data Ready Before BUSY↑

Delay Between Conversions

Wait Time RD↓ After BUSY↑

Data Access Time After RD↓

CONDITIONS

(Note 11)

(Note 10)

(Note 10)

(LTC1277 Only) (Note 11)

(Note 13)

CL = 100pF

CL = 100pF

(Note 11)

(Note 10)

CL = 20pF (Note 10)

CL = 100pF

t10

Bus Relinquish Time

CL = 100pF

t11

RD Low Time

(Note 10)

t12

CONVST High Time

(Notes 10, 13)

t13

Aperture Delay of Sample-and-Hold

t14

SLEEP↑ to REFRDY↑ Wake-Up Time 10µF Bypass at VREF Pin

4.7µF Bypass at VREF Pin

t15

HBEN↑ to High Byte Data Valid

CL = 100pF (LTC1277 Only)

4

MIN

●

●

TYP MAX UNITS

± 10

µA

15

pF

– 10

mA

10

mA

MIN TYP MAX

4.75

5.25

2.7 to 5.25

– 2.45

– 5.25

●

2

4

●

180 320

●

0.3

5

●

40

70

●

0.3

5

●

10

20

●

0.9

1.8

●

25/50

UNITS

V

V

V

mA

µA

µA

µA

µA

mW

mW

µW

MIN TYP MAX UNITS

● 100

ksps

●

6

8

µs

●

0.35

2

µs

●0

ns

● 30

ns

620

ns

● 40

ns

●

70

150

ns

● 20

65

ns

●

0.35

2

µs

● – 20

ns

50

110

ns

●

140

ns

65

125

ns

●

170

ns

20

60

90

ns

● 20

100

ns

● t9

ns

● 40

ns

35

ns

4.2

ms

3.3

ms

●

35

100

ns

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