ADC0808-N, ADC0809-N

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SNAS535H – OCTOBER 1999 – REVISED MARCH 2013

Electrical Characteristics – Converter Specifications (continued)

Converter Specifications: VCC=5 VDC=VREF+, VREF(−)=GND, TMIN≤TA≤TMAX and fCLK=640 kHz unless otherwise stated.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

ADC0809

0°C to 70°C

±1

LSB

Total Unadjusted Error(1)

TMIN to TMAX

±1¼

LSB

Input Resistance

From Ref(+) to Ref(

−)

1.0

2.5

k

Ω

Analog Input Voltage Range

See (2) V(+) or V(

−)

GND

− 0.1

VCC + 0.1

VDC

VREF(+)

Voltage, Top of Ladder

Measured at Ref(+)

VCC

VCC + 0.1

V

Voltage, Center of Ladder

(VCC/2) − 0.1

VCC/2

(VCC/2) + 0.1

V

VREF(−)

Voltage, Bottom of Ladder

Measured at Ref(

−)

−0.1

0

V

IIN

Comparator Input Current

fc=640 kHz,

(3)

−2

±0.5

2

μA

(2)

Two on-chip diodes are tied to each analog input which will forward conduct for analog input voltages one diode drop below ground or

one diode drop greater than the VCCn supply. The spec allows 100 mV forward bias of either diode. This means that as long as the

analog VIN does not exceed the supply voltage by more than 100 mV, the output code will be correct. To achieve an absolute 0VDC to

5VDC input voltage range will therefore require a minimum supply voltage of 4.900 VDC over temperature variations, initial tolerance and

loading.

(3)

Comparator input current is a bias current into or out of the chopper stabilized comparator. The bias current varies directly with clock

frequency and has little temperature dependence (Figure 8). See ANALOG COMPARATOR INPUTS

Electrical Characteristics – Digital Levels and DC Specifications

Digital Levels and DC Specifications: ADC0808CCN, ADC0808CCV, ADC0809CCN and ADC0809CCV, 4.75

≤VCC≤5.25V,

−40°C≤TA≤+85°C unless otherwise noted

Symbol

Parameter

Conditions

Min

Typ

Max

Units

ANALOG MULTIPLEXER

VCC=5V, VIN=5V,

IOFF(+)

OFF Channel Leakage Current

TA=25°C

10

200

nA

TMIN to TMAX

1.0

μA

VCC=5V, VIN=0,

IOFF(−)

OFF Channel Leakage Current

TA=25°C

−200

−10

nA

TMIN to TMAX

−1.0

μA

CONTROL INPUTS

VIN(1)

Logical “1” Input Voltage

(VCC − 1.5)

V

VIN(0)

Logical “0” Input Voltage

1.5

V

Logical “1” Input Current (The Control

IIN(1)

VIN=15V

1.0

μA

Inputs)

Logical “0” Input Current (The Control

IIN(0)

VIN=0

−1.0

μA

Inputs)

ICC

Supply Current

fCLK=640 kHz

0.3

3.0

mA

DATA OUTPUTS AND EOC (INTERRUPT)

VCC = 4.75V

VOUT(1)

Logical “1” Output Voltage

IOUT = −360µA

2.4

V

IOUT = −10µA

4.5

V

VOUT(0)

Logical “0” Output Voltage

IO=1.6 mA

0.45

V

VOUT(0)

Logical “0” Output Voltage EOC

IO=1.2 mA

0.45

V

VO=5V

3

μA

IOUT

TRI-STATE Output Current

VO=0

−3

μA

Electrical Characteristics – Timing Specifications

Timing Specifications VCC=VREF(+)=5V, VREF(−)=GND, tr=tf=20 ns and TA=25°C unless otherwise noted.

Symbol

Parameter

Conditions

MIn

Typ

Max

Units

tSTCLK

Start Time Delay from Clock

(Figure 7)

300

900

ns

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