LTC1293BCN datasheet(4/28 Pages) LINER

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LTC1293/LTC1294/LTC1296

129346fs

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIH

High Level Input Voltage

VCC = 5.25V

●

2.0

VIL

Low Level Input Voltage

VCC = 4.75V

●

0.8

IIH

High Level Input Current

VIN = VCC

●

2.5

µA

IIL

Low Level Input Current

VIN = 0V

●

–2.5

µA

VOH

High Level Output Voltage

VCC = 4.75V, IO = –10mA

4.7

IO = 360µA

●

2.4

4.0

VOL

Low Level Output Voltage

VCC = 4.75V, IO = 1.6mA

●

0.4

IOZ

High Z Output Leakage

VOUT = VCC, CS High

●

µA

VOUT = 0V, CS High

●

–3

ISOURCE

Output Source Current

VOUT = 0V

–20

ISINK

Output Sink Current

VOUT = VCC

ICC

Positive Supply Current

CS High

●

612

ICC

Positive Supply Current

CS High,

LTC1294BC, LTC1294CC,

●

510

µA

Power

LTC1294DC, LTC1294BI,

Shutdown

LTC1294CI, LTC1294DI,

CLK Off

LTC1294BM, LTC1294CM,

●

515

µA

LTC1294DM

IREF

Reference Current

CS High

●

µA

–

Negative Supply Current

CS High

●

150

µA

ISOURCEs

SSO Source Current

VSSO = 0V

●

0.8

1.5

ISINKs

SSO Sink Current

VSSO = VCC

●

0.5

1.0

ELECTRICAL C

HARA TER STICS

DIGITAL A D

(Note 3)

LTC1293/4/6B

LTC1293/4/6C

LTC1293/4/6D

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 DGND, AGND and REF

– wired

together (unless otherwise noted).

Note 3: VCC = 5V, VREF+ = 5V, VREF– = 0V, V

– = 0V for unipolar mode and

–5V for bipolar mode, CLK = 1.0MHz unless otherwise specified. The

●

denotes specifications which apply over the full operating temperature

range; all other limits and typicals TA = 25

°C.

Note 4: These specs apply for both unipolar and bipolar modes. In bipolar

mode, one LSB is equal to the bipolar input span (2VREF) divided by 4096.

For example, when VREF = 5V, 1LSB (bipolar) = 2 (5V)/4096 = 2.44mV.

Note 5: Linearity error is specified between the actual end points of the A/

D transfer curve. The deviation is measured from the center of the

quantization band.

Note 6: Recommended operating conditions.

Note 7: Two on-chip diodes are tied to each reference and analog input

which will conduct for reference or analog input voltages one diode drop

below V

– or one diode drop above VCC. Be careful during testing at low

VCC levels (4.5V), as high level reference or analog inputs (5V) can cause

this input diode to conduct, especially at elevated temperatures, and cause

errors for inputs near full scale. This spec allows 50mV forward bias of

either diode. This means that as long as the reference or analog input

does not exceed the supply voltage by more than 50mV, the output code

will be correct. To achieve an absolute 0V to 5V input voltage range will

therefore require a minimum supply voltage of 4.950V over initial

tolerance, temperature variations and loading.

Note 8: Channel leakage current is measured after the channel selection.

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