MAX1171 Datasheet, PDF (8/12 Pages) Maxim Integrated Products – 12-Bit, 20Msps, TTL-Output ADC

12-Bit, 20Msps, TTL-Output ADC
CLK
(TTL)
V_IN
(±2V)
+5V
C19
1µF
+5V
R1
100Ω
2 _{VIN VOUT} 6
+
IC1
(REF-03)
4 _GND
5
TRIM
10k
30k
3
2
1
IC2
-5.2V
10k
OP-07 ⁴
8
C17
7
0.01µF
C18
6
0.01µF
DGND
AGND
17 CLK
MAX1171
24 VIN
COARSE
ADC
4
+2.5V 21 VFT
+
C1
1µF 0.01µF
30k
R
22 VST
C2
0.01µF
2R
23 VRT3
C3
0.01µF
2R
25 VRT2
C4
0.01µF
2R
26 VRT1
C5
0.01µF
2R
27 VSB
C6
0.01µF
R
-2.5V 28 VFB
ANALOG
PRESCALER
SUCCESSIVE
INTERPOLATION
STAGE 1
SUCCESSIVE
INTERPOLATION
STAGE N
C16
C7
1µF
0.01µF
D12 14 (OVERRANGE)
D11 13 (MSB)
D10 12
D9 11
D8 10
D7 9
D6 8
D5 7
D4 6
D3 5
D2 4
D1 3
D0 2 (LSB)
18 31 19 30 20 29
C8 C10
0.1µF 0.1µF
16 32 1 15
C12
0.01µF
NOTES:
1) D1 = SCHOTTKY OR HOT CARRIER DIODE
2) FB = FERRITE BEAD, FAIR RIGHT P/N 2743001111, TO BE MOUNTED AS
CLOSELY AS POSSIBLE. THE FERRITE BEAD TO ADC CONNECTION SHOULD
NOT BE SHARED WITH ANY OTHER DEVICE.
3) C1–C3 = CHIP CAPACITOR (RECOMMENDED) MOUNTED AS CLOSELY TO
THE DEVICE’S PIN AS POSSIBLE
4) USE OF A SEPARATE SUPPLY FOR V_CC AND DV_CC IS NOT RECOMMENDED
5) R1 PROVIDES CURRENT LIMITING TO 45mA
C9 C11
0.1µF 0.1µF
C15 C14
D1
10µF 10µF
C13
0.01µF
FB
-5.2V
(ANALOG)
+5V
(ANALOG)
Figure 2. Typical Interface Circuit
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