MAX1284BESA+ Maxim Integrated Products, MAX1284BESA+ Datasheet - Page 11

• Manufacturer Part Number: MAX1284BESA+
• Description: IC ADC 12BIT 400KSPS 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX1284BESA+

• Number Of Bits: 12
• Sampling Rate (per Second): 400k
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 2.5mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Number Of Adc Inputs: 1
• Architecture: SAR
• Conversion Rate: 400 KSPs
• Resolution: 12 bit
• Interface Type: Serial
• Voltage Reference: Internal 2.5 V
• Supply Voltage (max): 5 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 7. Reference Power-Up vs. Time in Shutdown
Figure 8. Interface Timing Sequence
Figure 9. Detailed Serial-Interface Timing
400ksps/300ksps, Single-Supply, Low-Power,
1.50
1.25
1.00
0.75
0.50
0.25
Serial 12-Bit ADCs with Internal Reference
0
0.0001
DOUT
A/D STATE
SCLK
C
REF
______________________________________________________________________________________
CS
SCLK
0.001
DOUT HIGH-Z
= 4.7μF
CS
TIME IN SHUTDOWN (s)
t
t
CSO
ACQ
CSO
0.01
t
CSS
1
0.1
t
DOE
3
1
D11 D10 D9
t
CL
4
10
HOLD/CONVERT
t
CH
D8
t
CP
t
t
DOH
DOV
D7
8
D6
The MAX1284/MAX1285 serial interface is fully compat-
ible with SPI/QSPI and MICROWIRE (Figure 11).
If a serial interface is available, set the CPU’s serial interface
in master mode so the CPU generates the serial clock.
Choose a clock frequency up to 6.4MHz (MAX1284) or
4.8MHz (MAX1285).
1) Use a general-purpose I/O line on the CPU to pull CS
2) Activate SCLK for a minimum of fifteen clock cycles.
D5
low. Keep SCLK low.
The first two clocks produce zeros at DOUT. DOUT
output data transitions 20ns after the third SCLK rising
edge and is available in MSB-first format. Observe the
D4
D3
12
Connection to Standard Interfaces
D2
t
CSH
D1
Applications Information
D0
15
ACQUISITION
t
CSW
t
t
DOD
CSI
HIGH-Z
11