MAX1320EVB16 Maxim Integrated, MAX1320EVB16 Datasheet - Page 13

• Manufacturer Part Number: MAX1320EVB16
• Description: Data Conversion IC Development Tools 8-/4-/2-Channel 14-Bit Simultaneous-Sampling ADCs with 10V 5V and 0 to +5V Analog Input Ranges
• Manufacturer: Maxim Integrated
• Series: MAX1316, MAX1317, MAX1318, MAX1320, MAX1321, MAX1322, MAX1324, MAX1325, MAX1326r

Specifications of MAX1320EVB16

• Interface Type: Parallel

Figure 1. Functional Diagram
The MAX1316–MAX1318/MAX1320–MAX1322/MAX1324-
MAX1326 are 14-bit ADCs. They offer two, four, or eight
(independently selectable) input channels, each with its
own T/H circuitry. Simultaneous sampling of all active
channels preserves relative phase information, making
these devices ideal for motor control and power monitor-
ing. These devices are available with 0 to +5V, ±5V, and
±10V input ranges. The 0 to +5V devices feature ±6V
fault-tolerant inputs. The ±5V and ±10V devices feature
±16.5V fault-tolerant inputs. Two channels convert in 2µs;
all eight channels convert in 3.8µs, with a maximum 8-
channel throughput of 263ksps per channel. Internal or
external reference and internal- or external-clock capabil-
ity offer great flexibility and ease of use. A write-only con-
figuration register can mask out unused channels, and a
shutdown feature reduces power. A 16.6MHz, 14-bit, par-
allel data bus outputs the conversion result. Figure 1
shows the functional diagram of these devices.
8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
______________________________________________________________________________________
INTCLK/EXTCLK
Detailed Description
REF
AGND
AV
REF+
COM
MSV
REF-
CH0
CH7
REF
MS
DD
*SWITCH CLOSED ON UNIPOLAR DEVICES, OPEN ON BIPOLAR DEVICES
*
S/H
S/H
8 x 1
MUX
5kΩ
5kΩ
MAX1316–MAX1318
MAX1320–MAX1322
MAX1324–MAX1326
14-BIT
2.500V
ADC
To preserve phase information across these multichan-
nel devices, each input channel has a dedicated
T/H amplifier.
Use a low-input source impedance to minimize gain-
error harmonic distortion. The time required for the T/H
to acquire an input signal depends on the input source
impedance. If the input signal’s source impedance is
high, the acquisition time lengthens and more time
must be allowed between conversions. The acquisition
time (t
acquire the signal. Use the following formula to calcu-
late acquisition time:
where R
impedance, and t
impedance of less than 100Ω does not significantly
affect the ADC’s performance.
1
) is the maximum time the device takes to
CONFIGURATION
IN
INTERFACE
REGISTER
CONTROL
= 2.2kΩ, R
AND
t
1
= 10 (R
1
is never less than 180ns. A source
S
S
= the input signal’s source
+ R
WR
CS
RD
CONVST
SHDN
CLK
ALLON
EOC
EOLC
DGND
DV
D13
D8
D7
D0
IN
DD
) x 6pF
Analog Inputs
T/H
13