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ADC12132 Arkusz danych(PDF) 7 Page - Texas Instruments

Numer części ADC12132
Szczegółowy opis  ADC12130/ADC12132/ADC12138 Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
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ADC12132 Arkusz danych(HTML) 7 Page - Texas Instruments

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ADC12130, ADC12132, ADC12138
www.ti.com
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
dB
S/(N+D)
Signal-to-Noise Plus Distortion Ratio
fIN = 20 kHz, VIN = 5 VPP, VREF
+ = 5.0V
68.3
dB
fIN = 40 kHz, VIN = 5 VPP, VREF+ = 5.0V
65.7
dB
−3 dB Full Power Bandwidth
VIN = 5 VPP, where S/(N+D) drops 3 dB
31
kHz
DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS
fIN = 1 kHz, VIN = ±5V, VREF
+ = 5.0V
77.0
dB
S/(N+D)
Signal-to-Noise Plus Distortion Ratio
fIN = 20 kHz, VIN = ±5V, VREF
+ = 5.0V
73.9
dB
fIN = 40 kHz, VIN = ±5V, VREF
+ = 5.0V
67.0
dB
−3 dB Full Power Bandwidth
VIN = ±5V, where S/(N+D) drops 3 dB
40
kHz
REFERENCE INPUT, ANALOG INPUTS AND MULTIPLEXER CHARACTERISTICS
CREF
Reference Input Capacitance
85
pF
A/DIN1 and A/DIN2 Analog Input
CA/D
75
pF
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
10
pF
CMUXOUT
MUX Output Capacitance
20
pF
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
5
%
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.
Copyright © 2000–2013, Texas Instruments Incorporated
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