Analog input bandwidth, Analog input range and fault tolerance, Figure 2. external clock-mode conversion (mode 0) – Rainbow Electronics MAX1301 User Manual
Page 15
Single-ended conversions are internally referenced to
AGND1 (Tables 3 and 4). In differential mode, IN+ and
IN- are selected according to Tables 3 and 5. When con-
figuring differential channels, the differential pair follows
the analog configuration byte for the positive channel.
For example, to configure CH2 and CH3 for a ±12V dif-
ferential conversion, set the CH2 analog configuration
byte for a differential conversion with the ±12V range
(1010 1100). To initiate a conversion for the CH2 and
CH3 differential pair, issue the command 1010 0000.
Analog Input Bandwidth
The MAX1300/MAX1301 input-tracking circuitry has a
2MHz small-signal bandwidth. The 2MHz input band-
width makes it possible to digitize high-speed transient
events. Harmonic distortion increases when digitizing
signal frequencies above 15kHz as shown in the THD
and -SFDR vs. Input Frequency plot in the Typical
Operating Characteristics.
Analog Input Range and Fault Tolerance
Figure 7 illustrates the software-selectable single-ended
analog input voltage range that produces a valid digital
output. Each analog input channel can be independently
programmed to one of seven single-ended input ranges
by setting the R[2:0] control bits with DIF/SGL = 0.
MAX1300/MAX1301
8-/4-Channel, ±12V Multirange Inputs,
Serial 16-Bit ADCs
______________________________________________________________________________________
15
CS
SCLK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
DIN
S
C2
C1
C0
0
0
0
0
ANALOG INPUT
TRACK AND HOLD*
DOUT
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
BYTE 1
BYTE 2
BYTE 3
BYTE 4
SSTRB
HOLD
TRACK
HOLD
t
ACQ
HIGH
IMPEDANCE
HIGH
IMPEDANCE
*TRACK AND HOLD TIMING IS CONTROLLED BY SCLK.
f
SAMPLE
≈ f
SCLK
/ 32
SAMPLING INSTANT
Figure 2. External Clock-Mode Conversion (Mode 0)