MAX1203BEAP-T Maxim Integrated, MAX1203BEAP-T Datasheet - Page 19

• Manufacturer Part Number: MAX1203BEAP-T
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1203BEAP-T

• Number Of Channels: 8/4
• Architecture: SAR
• Conversion Rate: 133 KSPs
• Resolution: 12 bit
• Input Type: Single-Ended/Differential
• Snr: 71 dB
• Interface Type: 4-Wire (SPI, Microwire, TMS320)
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-20
• Maximum Power Dissipation: 640 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 4.096 V

Figure 12b. Timing Diagram for Power-Down Modes, Internal Clock
Figure 12c. Additional I
for Each Digital Input at a Logic 1
Figure 13. MAX1202 FULLPD/FASTPD Power-Up Sequence
DIN
REFADJ
CLOCK
REF
SSTRB
MODE
MODE
DOUT
DIN
1
FULLPD
40
35
30
25
20
15
10
5
0
-60
2.5V
S X X X X X 1 0
0V
4V
0V
0 0
(V
______________________________________________________________________________________
DD
-20
(V
- V
DD
DD
IH
- V
TEMPERATURE (°C)
) = 1.95V
Shutdown Supply Current vs. V
IH
20
) = 2.55V
SETS INTERNAL
CLOCK MODE
CONVERSION
(V
DD
(ZEROS)
60
- V
5V, 8-Channel, Serial, 12-Bit ADCs
IH
) = 2.25V
100
POWERED UP
COMPLETE CONVERSION SEQUENCE
1
140
DATA VALID
= RC = 20k x C
FASTPD
2ms WAIT
0 1
IH
REFADJ
with 3V Digital Interface
INTERNAL CLOCK MODE
S
X
The MAX1202 can be used with an internal or external
reference, whereas an external reference is required for
the MAX1203. An external reference can be connected
directly at the REF terminal, or at the REFADJ pin.
An internal buffer is designed to provide 4.096V at
REF for both the MAX1202 and the MAX1203. The
MAX1202’s internally trimmed 2.44V reference is
buffered with a gain of 1.68. The MAX1203’s REFADJ
pin is buffered with a gain of 1.64, to scale an external
2.5V reference at REFADJ to 4.096V at REF.
The MAX1202’s full-scale range using the internal
reference is 4.096V with unipolar inputs and ±2.048V
with bipolar inputs. The internal reference voltage is
adjustable to ±1.5% with the circuit of Figure 17.
X
t
BUFFEN
X
1
X
X
0 0
NOPD
CH1
15µs
SETS FULL
POWER-DOWN
1
CONVERSION
1
External and Internal References
1
FULLPD
CH7
MAX1202 Internal Reference
0 0
DATA VALID
POWER-DOWN
(ZEROS)
FULL
1
FASTPD
S
POWERED
UP
0 1
19