MAX1161ACPI 查看數據表（PDF） - Maxim Integrated
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MAX1161ACPI Datasheet PDF : 8 Pages
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10-Bit, 40Msps, TTL-Output ADC
CLK
CLK
(TTL)
R5
100Ω
VIN
±2.5V MAX
VIN
(±2V)
+5V
2 VIN IC1 VOUT 6
2.5V
VFT
C2
1µF
MAX6225
4
GND
VTRIM
R1
10k
1µF
C1 0.01µF
0.01µF
VST
R
5
R2
2R
30k
3
2 -5.2V R3
C3
0.01µF
2R
VRM
1
IC2
4
30k
2R
+5V
0.01µF
R4 OP07
10k
8
0.01µF
76
C4
0.01µF
2R
VSB
R
-2.5V VFB
1µF
C5
0.01µF
= AGND
= DGND
COARSE
ADC
ANALOG
PRESCALER
SUCCESSIVE
INTERPOLATION
STAGE 1
SUCCESSIVE
INTERPOLATION
STAGE N
MAX1161
4
D10 (OVERRANGE)
D9 (MSB)
D8
D7
D6
D5
D4
D3
D2
D1
D0 (LSB)
DIGITAL
OUTPUTS
NOTES:
1) D1 = SCHOTTKY OR HOT CARRIER DIODE
2) FB = FERRITE BEAD, FAIR RITE #2743001111
TO BE MOUNTED AS CLOSELY TO THE DEVICE
AS POSSIBLE. THE FERRITE BEAD TO ADC
CONNECTION SHOULD NOT BE SHARED WITH
ANY OTHER DEVICE.
3) C1–C11 = CHIP CAPACITOR (RECOMMENDED)
MOUNTED AS CLOSE TO DEVICE'S PIN AS
POSSIBLE.
4) USE OF A SEPARATE SUPPLY FOR VCC AND DVCC
IS NOT RECOMMENDED.
5) R5 PROVIDES CURRENT LIMITING TO 45mA.
Figure 2. Typical Operating Circuit
C6
C8
0.1µF 0.1µF
C7
C9
0.1µF 0.1µF
C10
0.01µF
C11
0.01µF
FB
D1
10µF
10µF
-5.2V
+5V
AGND
DGND
Analog Input
VIN is the analog input. The full-scale input range will be
VCC
80% of the reference voltage, or ±2V with VFB =
-2.5V and VFT = +2.5V.
The analog input’s drive requirements are minimal
when compared to conventional flash converters. This
is due to the MAX1161’s extremely low (5pF) input
VIN
VFT
capacitance and very high (300kΩ) input resistance.
For example, for an input signal of ±2Vp-p with a
10MHz input frequency, the peak output current
required for the driving circuit is only 628µA.
VEE
Figure 3. Analog Equivalent Input Circuit
_______________________________________________________________________________________ 7
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