Datasheet

MAX1191
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
______________________________________________________________________________________ 13
SUPPLY CURRENT
vs. INPUT FREQUENCY
MAX1191 toc34
f
IN
(MHz)
DIGITAL SUPPLY CURRENT (mA)
ANALOG SUPPLY CURRENT (mA)
321
0.5
0.6
0.7
0.8
0.9
0.4
3.9
4.0
4.1
4.2
4.3
3.8
04
DIGITAL SUPPLY CURRENT
ANALOG SUPPLY CURRENT
SUPPLY CURRENT
vs. SAMPLING RATE
MAX1191 toc35
f
CLK
(MHz)
SUPPLY CURRENT (mA)
15105
A: ANALOG SUPPLY CURRENT (I
DD
) - INTERNAL AND BUFFERED EXTERNAL
REFERENCE MODES
B: ANALOG SUPPLY CURRENT (I
DD
) - UNBUFFERED EXTERNAL REFERENCE MODE
C: DIGITAL SUPPLY CURRENT (I
ODD
) - ALL REFERENCE MODES
2
4
1
3
5
6
7
0
020
A
B
C
f
IN
= 2.017059MHz
Pin Description
PIN NAME FUNCTION
1 INA- Channel A Negative Analog Input. For single-ended operation, connect INA- to COM.
2 INA+ Channel A Positive Analog Input. For single-ended operation, connect signal source to INA+.
3, 5, 10 GND Analog Ground. Connect all GND pins together.
4 CLK Converter Clock Input
6 INB+ Channel B Positive Analog Input. For single-ended operation, connect signal source to INB+.
7 INB- Channel B Negative Analog Input. For single-ended operation, connect INB- to COM.
8, 9, 28 V
DD
Converter Power Input. Connect to a 2.7V to 3.6V power supply. Bypass V
DD
to GND with a
combination of a 2.2µF capacitor in parallel with a 0.1µF capacitor.
11 OGND Output Driver Ground
12 OV
DD
Output Driver Power Input. Connect to a 1.8V to V
DD
power supply. Bypass OV
DD
to GND with a
combination of a 2.2µF capacitor in parallel with a 0.1µF capacitor.
13 D7 Tri-State Digital Output. D7 is the most significant bit (MSB).
14 D6 Tri-State Digital Output
15 D5 Tri-State Digital Output
16 D4 Tri-State Digital Output
17 A/B
Channel Data Indicator. This digital output indicates channel A data (A/B = 1) or channel B data
(A/B = 0) is present on the output.
18 D3 Tri-State Digital Output
19 D2 Tri-State Digital Output
20 D1 Tri-State Digital Output
21 D0 Tri-State Digital Output. D0 is the least significant bit (LSB).
22 PD1 Power-Down Digital Input 1. See Table 3.
Typical Operating Characteristics (continued)
(V
DD
= 3.0V, OV
DD
= 1.8V, V
REFIN
= V
DD
(internal reference), C
L
≈ 10pF at digital outputs, differential input at -0.5dB FS, f
CLK
=
7.500567MHz at 50% duty cycle, T
A
= +25°C, unless otherwise noted.)