ADC12130CIWM datasheet(7/52 Pages) TI1

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ADC12130, ADC12132, ADC12138

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SNAS098G – MARCH 2000 – REVISED MARCH 2013

Converter Electrical Characteristics (continued)

The following specifications apply for (V

+ = V

A+ = VD+ = +5V, VREF+ = +4.096V, and fully differential input with fixed 2.048V

common-mode voltage) or (V

+ = V

A+ = VD+ = 3.3V, VREF+ = 2.5V and fully-differential input with fixed 1.250V common-mode

voltage), VREF− = 0V, 12-bit + sign conversion mode

(1), source impedance for analog inputs, V

REF

− and V

REF

+ ≤ 25Ω, f

CK = fSK

= 5 MHz, and 10 (tCK) acquisition time unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other

limits TA = TJ = 25°C.

(2)(3)(4)

Units

Parameter

Test Conditions

Typical (5)

Limits (6)

(Limits)

DC Common Mode Error

After Auto Cal (10)

±2

LSB (max)

TUE

Total Unadjusted Error

After Auto Cal (7)(11) (12)

±1

LSB

Multiplexer Chan-to-Chan Matching

V+ = +5V ±10%, VREF = +4.096V

±0.05

LSB

Power Supply Sensitivity

Offset Error

±0.5

LSB

+ Full-Scale Error

±0.5

LSB

− Full-Scale Error

±0.5

LSB

Integral Linearity Error

±0.5

LSB

UNIPOLAR DYNAMIC CONVERTER CHARACTERISTICS

fIN = 1 kHz, VIN = 5 VPP, VREF

+ = 5.0V

69.4

S/(N+D)

Signal-to-Noise Plus Distortion Ratio

fIN = 20 kHz, VIN = 5 VPP, VREF

+ = 5.0V

68.3

fIN = 40 kHz, VIN = 5 VPP, VREF+ = 5.0V

65.7

−3 dB Full Power Bandwidth

VIN = 5 VPP, where S/(N+D) drops 3 dB

kHz

DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS

fIN = 1 kHz, VIN = ±5V, VREF

+ = 5.0V

77.0

S/(N+D)

Signal-to-Noise Plus Distortion Ratio

fIN = 20 kHz, VIN = ±5V, VREF

+ = 5.0V

73.9

fIN = 40 kHz, VIN = ±5V, VREF

+ = 5.0V

67.0

−3 dB Full Power Bandwidth

VIN = ±5V, where S/(N+D) drops 3 dB

kHz

REFERENCE INPUT, ANALOG INPUTS AND MULTIPLEXER CHARACTERISTICS

CREF

Reference Input Capacitance

A/DIN1 and A/DIN2 Analog Input

CA/D

Capacitance

A/DIN1 and A/DIN2 Analog Input

VIN = +5.0V or VIN = 0V

±0.1

μA

Leakage Current

GND

− 0.05

V (min)

CH0–CH7 and COM Input Voltage

(VA+) + 0.05

V (max)

CCH

CH0–CH7 and COM Input Capacitance

CMUXOUT

MUX Output Capacitance

On Channel = 5V and

−0.01

μA

Off Channel = 0V

Off Channel Leakage (13)

CH0–CH7 and COM Pins

On Channel = 0V and

0.01

μA

Off Channel = 5V

On Channel = 5V and

0.01

μA

Off Channel = 0V

On Channel Leakage (13)

CH0–CH7 and COM Pins

On Channel = 0V and

−0.01

μA

Off Channel = 5V

MUXOUT1 and MUXOUT2 Leakage

VMUXOUT = 5.0V or VMUXOUT = 0V

0.01

μA

Current

VIN = 2.5V and

RON

MUX On Resistance

850

1900

Ω (max)

VMUXOUT = 2.4V

VIN = 2.5V and

RON Matching Channel to Channel

VMUXOUT = 2.4V

(10) The DC common-mode error is measured in the differential multiplexer mode with the assigned positive and negative input channels

shorted together.

(11) Offset or Zero error is a measure of the deviation from the mid-scale voltage (a code of zero), expressed in LSB. It is the average value

of the code transitions between

−1 to 0 and 0 to +1 (see Figure 7).

(12) Total unadjusted error includes offset, full-scale, linearity and multiplexer errors.

(13) Channel leakage current is measured after the channel selection.

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