Datasheet

ADC0844, ADC0848
www.ti.com SNAS523D –JUNE 1999–REVISED MARCH 2013
Operating Conditions
(1)(2)
Supply Voltage (V
CC
) 4.5 V
DC
to 6.0 V
DC
ADC0844CCN, ADC0848BCN, ADC0848CCN 0°C≤T
A
≤70°C
Temperature Range (T
MIN
≤T
A
≤T
MAX
)
ADC0844BCJ
(3)
, ADC0844CCJ
(3)
, ADC0848BCV,
−40°C≤T
A
≤85°C
ADC0848CCV
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its specified operating conditions.
(2) All voltages are measured with respect to the ground pins.
(3) Product/package combination obsolete; shown for reference only.
Electrical Characteristics
The following specifications apply for V
CC
= 5 V
DC
unless otherwise specified. Boldface limits apply from T
MIN
to T
MAX
; all
other limits T
A
= T
j
= 25°C.
ADC0844CCN,
ADC0848BCN,
ADC0844BCJ
(1)
ADC0848CCN,
ADC0844CCJ
(1)
Limit
ADC0848BCV,
Parameter Conditions
Units
ADC0848CCV
Tested Design Tested Design
Typ
(2)
Typ
(2)
Limit
(3)
Limit
(4)
Limit
(3)
Limit
(4)
CONVERTER AND MULTIPLEXER CHARACTERISTICS
Maximum Total
ADC0844BCN,
±½ ±½ LSB
ADC0848BCN, BCV
V
REF
= 5.00 V
DC
(5)
Unadjusted
ADC0844CCN,
Error ±1 ±1 LSB
ADC0848CCN, CCV
ADC0844CCJ
(1)
±1 LSB
Minimum Reference Input Resistance 2.4 1.1 2.4 1.2 1.1 kΩ
Maximum Reference Input Resistance 2.4 5.9 2.4 5.4 5.9 kΩ
V
CC
+ V
CC
+ V
CC
+
Maximum Common-Mode Input Voltage See
(6)
V
0.05 0.05 0.05
GND − GND − GND −
Minimum Common-Mode Input Voltage See
(6)
V
0.05 0.05 0.05
DC Common-Mode Error Differential Mode ±1/16 ±¼ ±1/16 ±¼ ±¼ LSB
Power Supply Sensitivity V
CC
= 5V±5% ±1/16 ±⅛ ±1/16 ±⅛ ±⅛ LSB
On Channel = 5V, Off
−1 −0.1 −1 μA
Channel = 0V
(7)
Off Channel Leakage Current
On Channel = 0V, Off
1 0.1 1 μA
Channel = 5V
DIGITAL AND DC CHARACTERISTICS
V
IN(1)
, Logical “1” Input Voltage (Min) V
CC
= 5.25V 2.0 2.0 2.0 V
V
IN(0)
, Logical “0” Input Voltage (Max) V
CC
= 4.75V 0.8 0.8 0.8 V
I
IN(1)
, Logical “1” Input Current (Max) V
IN
= 5.0V 0.005 1 0.005 1 μA
I
IN(0)
, Logical “0” Input Current (Max) V
IN
= 0V −0.005 −1 −0.005 −1 μA
(1) This product/package combination is obsolete. Shown for reference only.
(2) Typical figures are at 25°C and represent most likely parametric norm.
(3) Tested limits are specified to TI's AOQL (Average Outgoing Quality Level).
(4) Design limits are specified by not 100% tested. These limits are not used to calculate outgoing quality levels.
(5) Total unadjusted error includes offset, full-scale, linearity, and multiplexer error.
(6) For V
IN
(−) ≥ V
IN
(+) the digital output code will be 0000 0000. Two on-chip diodes are tied to each analog input, which will forward-
conduct for analog input voltages one diode drop below ground or one diode drop greater than V
CC
supply. Be careful during testing at
low V
CC
levels (4.5V), as high level analog inputs (5V) can cause this input diode to conduct, especially at elevated temperatures, and
cause errors for analog inputs near full-scale. The spec allows 50 mV forward bias of either diode. This means that as long as the
analog V
IN
does not exceed the supply voltage by more than 50 mV, the output code will be correct. To achieve an absolute 0 V
DC
to 5
V
DC
input voltage range will therefore require a minimum supply voltage of 4.950 V
DC
over temperature variations, initial tolerance and
loading.
(7) Off channel leakage current is measured after the channel selection.
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