ADC12L034CIWM datasheet(6/36 Pages) NSC

6 / 36 page

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 = 25Ω, source impedance for VREF+ 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

Units

(Limits)

(Note 11)

STATIC CONVERTER CHARACTERISTICS

Multiplexer Channel to Channel

±0.05

LSB

Matching

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

− Integral Linearity Error

±0.5

LSB

Output Data from

(Note 20)

+10

LSB (max)

“12-Bit Conversion of Offset”

−10

LSB (min)

(see

Table 5)

Output Data from

(Note 20)

4095

LSB (max)

“12-Bit Conversion of Full-Scale”

4093

LSB (min)

(see

Table 5)

UNIPOLAR DYNAMIC CONVERTER CHARACTERISTICS

S/(N+D)

Signal-to-Noise Plus

IN = 1 kHz, VIN = 2.5 VPP

69.4

Distortion Ratio

IN = 20 kHz, VIN = 2.5 VPP

68.3

IN = 40 kHz, VIN = 2.5 VPP

65.7

−3 dB Full Power Bandwidth

IN = 2.5 VPP, where S/(N+D)

drops 3 dB

kHz

DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS

S/(N+D)

Signal-to-Noise Plus

IN = 1 kHz, VIN = ±2.5V

77.0

Distortion Ratio

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

IN = +3.3V or

±0.1

±1.0

µA (max)

Leakage Current

IN = 0V

CH0–CH7 and COM Input Voltage

GND − 0.05

V (min)

A+ + 0.05

V (max)

CH0–CH7 and COM Input

Capacitance

MUXOUT

MUX Output Capacitance

Off Channel Leakage (Note 16)

On Channel = 3.3V and

−0.01

−0.3

µA (min)

CH0–CH7 and COM Pins

Off Channel = 0V

On Channel = 0V and

0.01

0.3

µA (max)

Off Channel = 3.3V

On Channel Leakage (Note 16)

On Channel = 3.3V and

0.01

0.3

µA (max)

CH0–CH7 and COM Pins

Off Channel = 0V

On Channel = 0V and

−0.01

−0.3

µA (min)

Off Channel = 3.3V

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