Owner manual
Table Of Contents
- ADC1175
- General Description
- Features
- Key Specifications
- Applications
- Pin Configuration
- Ordering Information
- Block Diagram
- Pin Descriptions and Equivalent Circuits
- Absolute Maximum Ratings
- Operating Ratings(Notes , )
- Converter Electrical Characteristics
- Typical Performance Characteristics
- Specification Definitions
- Timing Diagram
- FIGURE 2. tEN, tDISTest Circuit
- Functional Description
- Applications Information
- 1.0 THE ANALOG INPUT
- 2.0 REFERENCE INPUTS
- FIGURE 3. Simple, Low Component Count, Self -Bias Reference application. Because of resistor toleran
- FIGURE 4. Better defining the ADC Reference Voltage. Self-bias is still used, but the reference volt
- FIGURE 5. Driving the reference to force desired values requires driving with a low impedance source
- 3.0 POWER SUPPLY CONSIDERATIONS
- 4.0 THE ADC1175 CLOCK
- 5.0 LAYOUT AND GROUNDING
- FIGURE 6. Layout example showing separate analog and digital ground planes connected below the ADC11
- 6.0 DYNAMIC PERFORMANCE
- FIGURE 7. Isolating the ADC clock from Digital Circuitry.
- 7.0 COMMON APPLICATION PITFALLS
- FIGURE 8. 5.5 MHz Low Pass Filter to Eliminate Harmonics at the Signal Input.
- FIGURE 9. 11 MHz Low Pass filter to eliminate harmonics at the signal input. Use at input frequencie
- Physical Dimensions
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
AV
DD
,DV
DD
6.5V
Voltage on Any Pin −0.3V to 6.5V
V
RT
,V
RB
AV
SS
to AV
DD
CLK, OE Voltage −0.5 to (AV
DD
+ 0.5V)
Digital Output Voltage DV
SS
to DV
DD
Input Current (Note 3)
±
25mA
Package Input Current
(Note 3)
±
50mA
Package Dissipation at 25˚C (Note 4)
ESD Susceptibility (Note 5)
Human Body Model 2000V
Machine Model 200V
Soldering Temp., Infrared, 10
sec. (Note 6) 300˚C
Storage Temperature −65˚C to +150˚C
Operating Ratings(Notes 1, 2)
Temperature Range −20˚C ≤ T
A
≤ +75˚C
AV
DD
,DV
DD
+4.75V to +5.25V
AV
DD
−DV
DD
<
0.5V
|AV
SS
-DV
SS
| 0V to 100 mV
V
RT
1.0V to V
DD
V
RB
0V to 4.0V
V
RT
-V
RB
1V to 2.8V
V
IN
Voltage Range V
RB
to V
RT
Converter Electrical Characteristics
The following specifications apply for AV
DD
=DV
DD
= +5.0V
DC
, OE = 0V, V
RT
= +2.6V, V
RB
= 0.6V, C
L
= 20 pF,
f
CLK
= 20MHz at 50% duty cycle. Boldface limits apply for T
A
=T
MIN
to T
MAX
; all other limits T
A
= 25˚C (Notes 7, 8)
Symbol Parameter Conditions
Typical
(Note 9)
Limits
(Note 9)
Units
DC Accuracy
INL Integral Non Linearity f
CLK
= 20 MHz
±
0.5
±
1.3 LSB( max)
INL Integral Non Linearity f
CLK
= 30 MHz
±
1.0 LSB( max)
DNL Differential Non Linearity f
CLK
= 20 MHz
±
0.35
±
0.75 LSB( max)
DNL Differential Non Linearity f
CLK
= 30 MHz
±
1.0 LSB( max)
Missing Codes 0 (max)
E
OT
Top Offset −24 mV
E
OB
Bottom Offset +37 mV
Video Accuracy
DP Differential Phase Error
f
in
= 4.43 MHz sine wave,
f
CLK
= 17.7 MHz
0.5 Degree
DG Differential Gain Error
f
in
= 4.43 MHz sine wave,
f
CLK
= 17.7 MHz
0.4 %
Analog Input and Reference Characteristics
V
IN
Input Range 2.0
V
RB
V
RT
V(min)
V(max)
C
IN
V
IN
Input Capacitance V
IN
= 1.5V + 0.7Vrms
(CLK LOW) 4
pF
(CLK HIGH) 11
R
IN
R
IN
Input Resistance
>
1MΩ
BW Analog Input Bandwidth 120 MHz
R
RT
Top Reference Resistor 360 Ω
R
REF
Reference Ladder Resistance V
RT
to V
RB
300
200 Ω(min)
400 Ω(max)
R
RB
Bottom Reference Resistor 90 Ω
I
REF
Reference Ladder Current
V
RT
=V
RTS
,V
RB
=V
RBS
7
4.8 mA (min)
9.3 mA(max)
V
RT
=V
RTS
,V
RB
=AV
SS
8
5.4 mA (min)
10.5 mA(max)
ADC1175
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