Datasheet

ADC12048
SNAS105B –APRIL 2000–REVISED MARCH 2013 www.ti.com
Power Supply Characteristics
The following specifications apply to the ADC12048 for V
A
+ = V
D
+ = 5V, V
REF
+ = 4.096V, V
REF
− = 0.0V, 12-bit + sign
conversion mode, f
CLK
= 12.0 MHz, R
S
= 25Ω, source impedance for V
REF
+ and V
REF
− ≤ 1Ω, fully differential input with fixed
2.048V common-mode voltage, and minimum 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
Unit
Symbol Parameter Conditions Typical
(1)
Limits
(2)
(Limit)
PSS Power Supply Sensitivity V
D
+ = V
A
+ = 5.0V ±10%
(3)
Zero Error V
REF
+ = 4.096V ±0.1 LSB
Full-Scale Error V
REF
− = 0V ±0.5 LSB
Linearity Error ±0.1 LSB
I
D
+ V
D
+ Digital Supply Current Start Command (Performing a conversion)
with SYNC configured as an input and
driven with a 214 kHz signal. Bus width set
to 13.
f
CLK
= 12.0 MHz, Reset Mode 850 μA
f
CLK
= 12.0 MHz, Conversion 2.45 2.8 mA (max)
I
A
+ V
A
+ Analog Supply Current Start Command (Performing a conversion)
with SYNC configured as an input and
driven with a 214 kHz signal. Bus width set
to 13.
f
CLK
= 12.0 MHz, Reset Mode 2.3 mA
f
CLK
= 12.0 MHz, Conversion 2.3 4.0 mA (max)
I
ST
Standby Supply Current Standby Mode
(I
D
+ + I
A
+) f
CLK
= Stopped 5 15 μA (max)
f
CLK
= 12.0 MHz 100 120 μA (max)
(1) Typicals are at T
A
= 25°C and represent most likely parametric norm.
(2) Limits are ensured to AOQL (Average Outgoing Quality Level).
(3) Power Supply Sensitivity is measured after an Auto-Zero and Auto Calibration cycle has been completed with V
A
+ and V
D
+ at the
specified extremes.
Analog MUX Inputs Characteristics
The following specifications apply to the ADC12048 for V
A
+ = V
D+
= 5V, V
REF
+ = 4.096V, V
REF
− = 0.0V, 12-Bit + sign
conversion mode, f
CLK
= 12.0 MHz, R
S
= 25Ω, source impedance for V
REF
+ and V
REF
+ ≤ 1Ω, fully differential input with fixed
2.048V common-mode voltage, and minimum 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
Unit
Symbol Parameter Conditions Typical
(1)
Limits
(2)
(Limit)
I
ON
MUX ON Channel Leakage Current ON Channel = 5V, OFF Channel = 0V 0.05 1.0 μA (min)
ON Channel = 0V, OFF Channel = 5V −0.05 −1.0 μA (max)
I
OFF
MUX OFF Channel Leakage ON Channel = 5V, OFF Channel = 0V 0.05 1.0 μA (min)
Current
ON Channel = 0V, OFF Channel = 5V −0.05 −1.0 μA (max)
I
ADCIN
ADCIN Input Leakage Current 0.05 2.0 μA (max)
R
ON
MUX On Resistance V
IN
= 2.5V 310 500 Ω (max)
MUX Channel-to-Channel R
ON
V
IN
= 2.5V ±20% Ω
Matching
C
MUX
MUX Channel and COM Input
10 pF
Capacitance
C
ADC
ADCIN Input Capacitance 70 pF
C
MUXOUT
MUX Output Capacitance 20 pF
(1) Typicals are at T
A
= 25°C and represent most likely parametric norm.
(2) Limits are ensured to AOQL (Average Outgoing Quality Level).
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