MAX1184
Dual 10-Bit, 20Msps, 3V, Low-Power ADC with
Internal Reference and Parallel Outputs
_______________________________________________________________________________________ 9
1.990
2.000
1.995
2.005
2.010
2.015
-40 85
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1184 toc25
TEMPERATURE (
°
C)
V
REOUT
(V)
10-15 35 60
0
21,000
14,000
7,000
28,000
35,000
42,000
49,000
56,000
63,000
70,000
OUTPUT NOISE HISTOGRAM (DC INPUT)
MAX1184 toc26
DIGITAL OUTPUT CODE
COUNTS
64,515
N
869
N-1
152
N+1
0
N+2
0
N-2
Typical Operating Characteristics (continued)
(V
DD
= 3V, OV
DD
= 2.5V, V
REFIN
= 2.048V, differential input at -0.5dBFS, f
CLK
= 20MHz, C
L
≈ 10pF, T
A
= +25°C, unless otherwise noted.)
Pin Description
PIN NAME FUNCTION
1 COM Common-Mode Voltage Input/Output. Bypass to GND with a ≥ 0.1µF capacitor.
2, 6, 11, 14, 15 V
DD
Analog Supply Voltage. Bypass each pin to GND with a 0.1µF capacitor. The analog supply
accepts an input range of 2.7V to 3.6V.
3, 7, 10, 13, 16 GND Analog Ground
4 INA+ Channel A Positive Analog Input. For single-ended operation, connect signal source to INA+.
5 INA- Channel A Negative Analog Input. For single-ended operation, connect INA- to COM.
8 INB- Channel B Negative Analog Input. For single-ended operation, connect INB- to COM.
9 INB+ Channel B Positive Analog Input. For single-ended operation, connect signal source to INB+.
12 CLK Converter Clock Input
17 T/B
T/B selects the ADC digital output format.
High: Two’s complement.
Low: Straight offset binary.
18 SLEEP
Sleep Mode Input.
High: Deactivates the two ADCs, but leaves the reference bias circuit active.
Low: Normal operation.
19 PD
Power-Down Input.
High: Power-down mode
Low: Normal operation
20 OE
Output Enable Input.
High: Digital outputs disabled
Low: Digital outputs enabled
