ADC12L034 datasheet(5/35 Pages) NSC

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Converter Electrical Characteristics (Continued)

The following specifications apply for V

+ =V

A+=VD+ = +3.3 VDC,VREF+ = +2.500 VDC,VREF−=0VDC, 12-bit + sign conver-

sion mode, f

CK =fSK = 5 MHz, RS =25

Ω, source impedance for V

REF+ and VREF−

≤ 25Ω, fully-differential input with fixed

1.250V common-mode voltage, and 10(t

CK) acquisition time unless otherwise specified. Boldface limits apply for TA =TJ =

MIN to TMAX; all other limits TA =TJ = 25˚C. (Notes 7, 8, 9)

Symbol

Parameter

Conditions

Typical

(Note 10)

Limits

(Note 11)

Units

(Limits)

STATIC CONVERTER CHARACTERISTICS

Multiplexer Chan-to-Chan Matching

±0.05

LSB

Power Supply Sensitivity

+ = +3.3V ±10%

Offset Error

±0.5

±1

LSB (max)

+ Full-Scale Error

±0.5

±1.5

LSB (max)

− Full-Scale Error

±0.5

±1.5

LSB (max)

Integral Linearity Error

±0.5

LSB

Output Data from

“12-Bit Conversion of Offset”

(see Table 5)

(Note 20)

+10

−10

LSB (max)

LSB (min)

Output Data from

“12-Bit Conversion of Full-Scale”

(see Table 5)

(Note 20)

4095

4093

LSB (max)

LSB (min)

UNIPOLAR DYNAMIC CONVERTER CHARACTERISTICS

S/(N+D)

Signal-to-Noise Plus Distortion Ratio

IN = 1 kHz, VIN = 2.5 VP-P

69.4

IN = 20 kHz, VIN = 2.5 VP-P

68.3

IN = 40 kHz, VIN = 2.5 VPP

65.7

−3 dB Full Power Bandwidth

IN = 2.5 VP-P, where S/(N+D) drops 3 dB

kHz

DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS

S/(N+D)

Signal-to-Noise Plus Distortion Ratio

IN = 1 kHz, VIN = ±2.5V

77.0

IN = 20 kHz, VIN = ±2.5V

73.9

IN = 40 kHz, VIN = ±2.5V

67.0

−3 dB Full Power Bandwidth

IN = ±2.5V, where S/(N+D) drops 3 dB

kHz

REFERENCE INPUT, ANALOG INPUTS AND MULTIPLEXER CHARACTERISTICS

REF

Reference Input Capacitance

A/D

A/DIN1 and A/DIN2 Analog Input

Capacitance

A/DIN1 and A/DIN2 Analog Input

Leakage Current

IN = +3.3V or VIN =0V

±0.1

±1.0

µA (max)

CH0–CH7 and COM Input Voltage

GND − 0.05

A+ + 0.05

V (min)

V (max)

CH0–CH7 and COM Input

Capacitance

MUXOUT MUX Output Capacitance

Off Channel Leakage (Note 16)

CH0–CH7 and COM Pins

On Channel = 3.3V and Off Channel = 0V

−0.01

−0.3

µA (min)

On Channel = 0V and Off Channel = 3.3V

0.01

0.3

µA (max)

On Channel Leakage (Note 16)

CH0–CH7 and COM Pins

On Channel = 3.3V and Off Channel = 0V

0.01

0.3

µA (max)

On Channel = 0V and Off Channel = 3.3V

−0.01

−0.3

µA (min)

MUXOUT1 and MUXOUT2 Leakage

Current

MUXOUT = 3.3V or VMUXOUT = 0V

0.01

0.3

µA (max)

MUX On Resistance

IN = 1.65V and VMUXOUT = 1.55V

1300

1900

Ω (max)

ON Matching Channel to Channel

IN = 1.65V and VMUXOUT = 1.55V

Channel-to-Channel Crosstalk

IN = 3.3 VP-P,fIN = 40 kHz

−72

MUX Bandwidth

kHz

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