MAX11054ECB+T Maxim Integrated, MAX11054ECB+T Datasheet - Page 20

• Manufacturer Part Number: MAX11054ECB+T
• Description: Analog to Digital Converters - ADC 14Bit 4Ch Simult Sampling
• Manufacturer: Maxim Integrated

Specifications of MAX11054ECB+T

• Rohs: yes
• Number Of Channels: 4
• Architecture: SAR
• Conversion Rate: 250 KSPs
• Resolution: 14 bit
• Input Type: Single-Ended
• Snr: 92.3 dB
• Interface Type: Parallel
• Operating Supply Voltage: 2.7 V to 5.25 V, 4.75 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Power Dissipation: 3478 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 4
• Voltage Reference: 4.096 V

The MAX11044/MAX11045/MAX11046 and MAX11054/
MAX11055/MAX11056 have a built-in reference buffer
to provide a low-impedance reference source to the
SAR converters. This buffer is used in both internal and
external reference mode. The reference buffer output
feeds five RDC pins. The RDC pins should be all con-
nected together on the PCB. The reference buffer is
Figure 8. Two’s Complement Transfer Function for 16-Bit Devices
Figure 8b. Two’s Complement Transfer Function for 14-Bit Devices
4-/6-/8-Channel, 16-/14-Bit,
Simultaneous-Sampling ADCs
MAX11044/MAX11045/MAX11046/
MAX11054/MAX11055/MAX11056
20
1FFF
1FFE
3FFF
3FFE
0001
0000
2001
2000
7FFF
7FFE
FFFF
FFFE
0001
0000
8001
8000
+FS = 8191 x V
-FS = -8192 x V
+FS = 32,767 x V
V
-FS = -32,768 x V
OUTPUT CODE =
V
OUTPUT CODE =
LSB
-FS
LSB
-FS
= (10/4.096) x (V
= (10/4.096) x (V
-8191.5 x V
-32,767.5 x V
LSB
LSB
LSB
LSB
V
V
V
V
LSB
LSB
LSB
IN
INPUT VOLTAGE (LSB)
IN
INPUT VOLTAGE (LSB)
REF
LSB
REF
+ 32,768
+ 8192
/16,384)
/65,536)
FULL-SCALE
TRANSITION
FULL-SCALE
TRANSITION
0
0
+32,766.5 x V
+8190.5 x V
Reference Buffer
LSB
LSB
+FS
+FS
externally compensated and requires at least 10µF on
the RDC node. For best performance, provide a total of
at least 80µF on the RDC outputs.
Figures 8 and 9 show the transfer functions for all the
formats and devices. Code transitions occur halfway
between successive-integer LSB values.
Figure 9. Offset-Binary Transfer Function for 16-Bit Devices
Figure 9b. Offset-Binary Transfer Function for 14-Bit Devices
3FFF
3FFE
2001
2000
1FFF
1FFE
0001
0000
FFFF
FFFE
8001
8000
7FFF
7FFE
0001
0000
+FS = 8191 x V
OUTPUT CODE =
+FS = 32,767 x V
V
-FS = -8192 x V
-FS = -32,768 x V
OUTPUT CODE =
V
-FS
-FS
LSB
LSB
= (10/4.096) x (V
= (10/4.096) x (V
-32,767.5 x V
-8191.5 x V
LSB
LSB
LSB
LSB
V
V
V
V
LSB
LSB
LSB
IN
INPUT VOLTAGE (LSB)
IN
INPUT VOLTAGE (LSB)
LSB
REF
REF
/16,384)
/65,536)
FULL-SCALE
FULL-SCALE
TRANSITION
TRANSITION
0
0
Transfer Functions
+32,766.5 x V
+8190.5 x V
LSB
LSB
Maxim Integrated
+FS
+FS