ADC12130 Datasheet, PDF (6/41 Pages) National Semiconductor (TI) – Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold

Converter Electrical Characteristics
The following specifications apply for
common-mode voltage) or (V⁺ = V_A+
(V⁺ = V_A+ = V_D+ = +5V, V_REF+ = +4.096V, and fully differential input with
= V_D+ = 3.3V, V_REF+ = +2.5V and fully-differential input with fixed 1.250V
fixed
2.048V
common-mode voltage), V_REF− = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, V_REF− and V_REF+
≤ 25Ω, f_CK = f_SK = 5 MHz, and 10 (t_CK) acquisition time unless otherwise specified. Boldface limits apply for T_A = T_J =
T_MIN to T_MAX; all other limits T_A = T_J = 25˚C. (Notes 7, 8, 9) (Continued)
Symbol
Parameter
Conditions
Typical
(Note 10)
Limits
Units
(Note 11) ^(Limits)
STATIC CONVERTER CHARACTERISTICS (Continued)
Multiplexer Channel to Channel
±0.05
LSB
Matching
Power Supply Sensitivity
V⁺ = +5V ±10%
Offset Error
V_REF = +4.096V
±0.5
LSB
+ Full-Scale Error
±0.5
LSB
− Full-Scale Error
±0.5
LSB
+ Integral Linearity Error
±0.5
LSB
− Integral Linearity Error
±0.5
LSB
UNIPOLAR DYNAMIC CONVERTER CHARACTERISTICS
S/(N+D) Signal-to-Noise Plus
f_IN = 1 kHz, V_IN = 5 V_PP, V_REF+ = 5.0V
69.4
dB
Distortion Ratio
f_IN = 20 kHz, V_IN = 5 V_PP, V_REF+ = 5.0V
68.3
dB
f_IN = 40 kHz, V_IN = 5 V_PP, V_REF+ = 5.0V
65.7
dB
−3 dB Full Power Bandwidth
V_IN = 5 V_PP, where S/(N+D) drops 3 dB
31
kHz
DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS
S/(N+D) Signal-to-Noise Plus
f_IN = 1 kHz, V_IN = ±5V, V_REF+ = 5.0V
77.0
dB
Distortion Ratio
f_IN = 20 kHz, V_IN = ±5V, V_REF+ = 5.0V
73.9
dB
f_IN = 40 kHz, V_IN = ±5V, V_REF+ = 5.0V
67.0
dB
−3 dB Full Power Bandwidth
V_IN = ±5V, where S/(N+D) drops 3 dB
40
kHz
Electrical Characteristics
The following specifications apply for
common-mode voltage) or (V⁺ = V_A+
(V⁺ = V_A+ = V_D+ = +5V, V_REF+ = +4.096V, and fully differential input with
= V_D+ = +3.3V, V_REF+ = 2.5V and fully-differential input with fixed 1.250V
fixed
2.048V
common-mode voltage), V_REF− = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, V_REF− and V_REF+
≤ 25Ω, f_CK = f_SK = 5 MHz, and 10 (t_CK) acquisition time unless otherwise specified. Boldface limits apply for T_A = T_J =
T_MIN to T_MAX; all other limits T_A = T_J = 25˚C. (Notes 7, 8, 9)
Symbol
Parameter
Conditions
Typical
Limits
Units
(Note 10)
(Note 11)
(Limits)
REFERENCE INPUT, ANALOG INPUTS AND MULTIPLEXER CHARACTERISTICS
C_REF
C_A/D
Reference Input Capacitance
A/DIN1 and A/DIN2 Analog Input
Capacitance
85
pF
75
pF
A/DIN1 and A/DIN2 Analog Input
V_IN = +5.0V or
±0.1
µA
Leakage Current
V_IN = 0V
CH0–CH7 and COM Input Voltage
GND − 0.05
V
C_CH
CH0–CH7 and COM Input
Capacitance
V_A+ + 0.05
10
pF
C_MUXOUT MUX Output Capacitance
20
pF
Off Channel Leakage (Note 16)
On Channel = 5V and
−0.01
µA
CH0–CH7 and COM Pins
Off Channel = 0V
On Channel = 0V and
0.01
µA
Off Channel = 5V
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