ADC121S625CIMMX datasheet(4/20 Pages) NSC

Part #	ADC121S625CIMMX

Description	12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter

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Manufacturer	NSC [National Semiconductor (TI)]

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ADC121S625 Converter Electrical Characteristics (Note 8) (Continued)

The following specifications apply for V

A = +4.5V to 5.5V, VREF = 2.5V, fSCLK = 0.8 to 3.2 MHz, fIN = 20 kHz, CL = 100 pF, un-

less otherwise noted. Boldface limits apply for T

A =TMIN to TMAX: all other limits TA = 25˚C.

Symbol

Parameter

Conditions

Typical

Limits

Units

(Note 7)

ANALOG INPUT CHARACTERISTICS

I

REF

Reference Current

CS low, f

SCLK = 3.2 MHz,

f

S = 200 ksps, output = FF8h

12

µA

CS low, f

SCLK = 3.2 MHz,

f

S = 50 ksps, output = FF8h

3µA

CS low, f

SCLK = 3.2 MHz,

12.5 ksps, output = FF8h

0.7

µA

CS high, f

SCLK =0

0.3

µA

DIGITAL INPUT CHARACTERISTICS

V

IH

Input High Voltage

V

A = 4.5V to 5.5V

2.4

V (min)

V

IL

Input Low Voltage

V

A = 4.5V to 5.5V

0.8

V (max)

I

IN

Input Current

V

IN =0VorVA

±0.03

1

µA (max)

C

IND

Input Capacitance

2

4

pF (max)

DIGITAL OUTPUT CHARACTERISTICS

V

OH

Output High Voltage

V

A = 4.5V to 5.5V, ISOURCE = 250 µA

V

A − 0.05

V

A − 0.2

V (min)

V

A = 4.5V to 5.5V, ISOURCE =2mA

V

A − 0.1

V

OL

Output Low Voltage

V

A = 4.5V to 5.5V, ISINK = 250 µA

0.02

0.4

V (max)

V

A = 4.5V to 5.5V, ISOURCE = 2 mA

0.1

V

I

OZH,

I

OZL

TRI-STATE Leakage Current

±0.03

±1

µA (max)

C

OUT

TRI-STATE Output Capacitance

2

4

pF (max)

Output Coding

Binary 2’S Complement

POWER SUPPLY CHARACTERISTICS

V

A

Analog Supply Voltage

4.5

V (min)

5.5

V (max)

I

A Active

Supply Current, Normal Mode

(Operational)

f

SCLK = 3.2 MHz, fSMPL = 200 ksps,

f

IN = 20 kHz, CL = 15pF

410

510

µA (max)

f

SCLK = 3.2 MHz, fSMPL = 12.5 ksps,

C

L = 15pF, Power Down between

conversions

31

µA

f

SCLK = 0.8 MHz, fSMPL = 50 ksps,

C

L = 15pF

242

µA

f

SCLK = 0.2 MHz, fSMPL = 12.5 ksps,

C

L = 15pF (Note 10)

200

µA

I

A

Shutdown

Supply Current, Shutdown (CS high)

f

SCLK = 0

0.01

2

µA (max)

f

SCLK = 3.2 MHz

6

µA

PWR

Active

Power Consumption, Normal Mode

(Operational)

f

SCLK = 3.2 MHz, fSMPL = 200 ksps,

f

IN = 20 kHz, CL = 15pF

2.25

2.8

mW (max)

f

SCLK = 3.2 MHz, fSMPL = 12.5 ksps,

C

L = 15pF, Power Down between

conversions

0.18

mW

f

SCLK = 0.8 MHz, fSMPL = 50 ksps,

C

L = 15pF

1.33

mW

f

SCLK = 0.2 MHz, fSMPL = 12.5 ksps,

C

L = 15pF (Note 10)

1.1

mW

PWR

Shutdown

Power Consumption, Shutdown (CS

high)

f

SCLK = 0

0.06

11

µW (max)

f

SCLK = 3.2 MHz

33

µW

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