Datasheet
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ADC1173
SNAS025F –FEBRUARY 1999–REVISED APRIL 2013
www.ti.com
CONVERTER ELECTRICAL CHARACTERISTICS
The following specifications apply for AV
DD
= DV
DD
= +3.0V
DC
, OE = 0V, V
RT
= +2.0V, V
RB
= 0V, C
L
= 20 pF, f
CLK
= 15MHz at
50% duty cycle. Boldface limits apply for T
A
= T
MIN
to T
MAX
; all other limits T
A
= 25°C
(1) (2)
Symbol Parameter Conditions Typical
(3)
Limits Units
DC Accuracy
INL Integral Non Linearity ±0.5 ±1.3 LSB ( max)
DNL Differential Non Linearity ±0.4 ±0.85 LSB ( max)
Missing Codes 0 (max)
E
OT
Top Offset −12 mV
E
OB
Bottom Offset +1.0 mV
Video Accuracy
DP Differential Phase Error f
in
= 3.58 MHz sine wave 0.5 Degree
DG Differential Gain Error f
in
= 3.58 MHz sine wave 1.5 %
Analog Input and Reference Characteristics
V
RB
V (min)
V
IN
Input Range 2.0
V
RT
V (max)
(CLK LOW) 4
C
IN
V
IN
Input Capacitance V
IN
= 1.5V + 0.7Vrms pF
(CLK HIGH) 11
R
IN
Input Resistance >1 MΩ
BW Analog Input Bandwidth 120 MHz
R
RT
Top Reference Resistor 360 Ω
300 200 Ω (min)
R
REF
Reference Ladder Resistance V
RT
to V
RB
400 Ω (max)
R
RB
Bottom Reference Resistor 90 Ω
mA
V
RT
=V
RTS
, V
RB
=V
RBS
4.2
I
REF
Reference Ladder Current
V
RT
=V
RTS
,V
RB
=AV
SS
4.8 mA
V
RT
connected to V
RTS
1.45 V (min)
V
RT
Reference Top Self Bias Voltage 1.56
V
RB
connected to V
RBS
1.65 V (max)
V
RT
connected to V
RTS
0.32 V (min)
Reference Bottom Self Bias
V
RB
0.36
Voltage
V
RB
connected to V
RBS
0.40 V (max)
(1) The analog inputs are protected as shown below. Input voltage magnitudes up to 6.5V or to 500 mV below GND will not damage this
device. However, errors in the A/D conversion can occur if the input goes above V
DD
or below GND by more than 50 mV. As an
example, if AV
DD
is 2.7V
DC
, the full-scale input voltage must be ≤2.75V
DC
to ensure accurate conversions.
(2) To ensure accuracy, it is required that AV
DD
and DV
DD
be well bypassed. Each supply pin must be decoupled with separate bypass
capacitors.
(3) Typical figures are at T
J
= 25°C, and represent most likely parametric norms. Test limits are ensured to TI's AOQL (Average Outgoing
Quality Level).
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