ADC7802BN Burr-Brown Corporation, ADC7802BN Datasheet - Page 7

• Manufacturer Part Number: ADC7802BN
• Description: Autocalibrating, 4-channel, 12-bit Analog-to-digital Converter
• Manufacturer: Burr-Brown Corporation

The bytes can be read in either order, depending on the status
of the HBE input. If HBE changes while CS and RD are
LOW, the output data will change to correspond to the HBE
input. Figure 4 shows the timing for reading first the Low
byte and then the High byte.
FIGURE 2. Converter Timing.
FIGURE 3. Write Cycle Timing (for initiating conversion or calibration).
FIGURE 4. Read Cycle Timing.
D0 - D7
WR or CAL
BUSY
HBE
SFR
BUSY
RD
CS
A0, A1
CLK
BUSY
WR
SFR
CS
Hi-Z State
t
7
t
1
t
8
11
and Sample Acquisition
t
13
Multiplexer Settling,
Offset Auto Zeroing
2
t
t
1
5
Low Byte Data
t
3
9
t
4
4
t
t
12
10
t
14
5
7
t
2
ADC7802 provides two modes for reading the conversion
results. At power-up, the converter is set in the Transparent
Mode.
6
Hi-Z
7
Approximation
Successive
Conversion
t
t
11
8
t
16
13
t
3
t
V
V
6
17
IH
IL
High Byte Data
18
t
t
10
12
ADC7802
t
14
®