MAX1304 Datasheet, PDF (13/36 Pages) Maxim Integrated Products – 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with ±10V, ±5V, and 0 to +5V Analog Input Ranges

8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
Pin Description
MAX1304
MAX1308
MAX1312
1, 15, 17
2, 3, 14,
16, 23
4
5
6
7
8
9
10
11
12
13
18
19
PIN
MAX1305
MAX1309
MAX1313
1, 15, 17
2, 3, 14,
16, 23
4
5
6
7
8
—
—
—
—
13
18
19
MAX1306
MAX1310
MAX1314
NAME
FUNCTION
1, 15, 17
AV_DD
Analog Power Input. AV_DD is the power input for the analog section of the
converter. Apply +5V to AV_DD. Connect all AV_DD pins together. See the Layout,
Grounding, and Bypassing section for additional information.
2, 3, 14,
16, 23
4
5
6
—
—
—
—
—
—
13
18
19
AGND
CH0
CH1
Analog Ground. AGND is the power return for AV_DD. Connect all AGND
pins together.
Channel 0 Analog Input
Channel 1 Analog Input
MSV
Midscale Voltage Bypass. For the unipolar MAX1304/MAX1305/MAX1306,
connect a 2.2µF and a 0.1µF capacitor from MSV to AGND. For the bipolar
MAX1308/MAX1309/MAX1310/MAX1312/MAX1313/MAX1314, connect
MSV to AGND.
CH2 Channel 2 Analog Input
CH3 Channel 3 Analog Input
CH4 Channel 4 Analog Input
CH5 Channel 5 Analog Input
CH6 Channel 6 Analog Input
CH7 Channel 7 Analog Input
INTCLK/
EXTCLK
Clock-Mode Select Input. Connect INTCLK/EXTCLK to AV_DD to select the
internal clock. Connect INTCLK/EXTCLK to AGND to use an external clock
connected to CLK.
REF_MS
REF
Midscale Reference Bypass or Input. REF_MS connects through a 5kΩ resistor to
the internal +2.5V bandgap reference buffer.
For the MAX1304/MAX1305/MAX1306 unipolar devices, V_REFMS is the input to
the unity-gain buffer that drives MSV. MSV sets the midpoint of the input voltage
range. For internal reference operation, bypass REF_MS with a ≥0.01µF
capacitor to AGND. For external reference operation, drive REF_MS with an
external voltage from +2V to +3V.
For the MAX1308/MAX1309/MAX1310/MAX1312/MAX1313/MAX1314 bipolar
devices, connect REF_MS to REF. For internal reference operation, bypass the
REF_MS/REF node with a ≥0.01µF capacitor to AGND. For external reference
operation, drive the REF_MS/REF node with an external voltage from +2V to +3V.
ADC Reference Bypass or Input. REF connects through a 5kΩ resistor to the
internal +2.5V bandgap reference buffer.
For internal reference operation, bypass REF with a ≥0.01µF capacitor.
For external reference operation with the MAX1304/MAX1305/MAX1306
unipolar devices, drive REF with an external voltage from +2V to +3V.
For external reference operation with the MAX1308/MAX1309/MAX1310/
MAX1312/MAX1313/MAX1314 bipolar devices, connect REF_MS to REF and
drive the REF_MS/REF node with an external voltage from +2V to +3V.
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