MAX1179AEUI-T Maxim Integrated, MAX1179AEUI-T Datasheet - Page 7

• Manufacturer Part Number: MAX1179AEUI-T
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1179AEUI-T

• Number Of Channels: 1
• Architecture: SAR
• Conversion Rate: 135 KSPs
• Resolution: 16 bit
• Input Type: Single-Ended
• Snr: 91 dB
• Interface Type: Parallel
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-28
• Maximum Power Dissipation: 1026 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 4.096 V

The MAX1179/MAX1187/MAX1189 use a successive-
approximation (SAR) conversion technique with an
inherent track-and-hold (T/H) stage to convert an ana-
log input into a 16-bit digital output. Parallel outputs
provide a high-speed interface to microprocessors
(µPs). The Functional Diagram at the end of the data
sheet shows a simplified internal architecture of the
MAX1179/MAX1187/MAX1189. Figure 3 shows a typical
application circuit for the MAX1179/MAX1187/MAX1189.
The MAX1179/MAX1187/MAX1189 have an input scaler
which allows conversion of true bipolar input voltages
and input voltages greater than the power supply, while
operating from a single +5V analog supply. The input
scaler attenuates and shifts the analog input to match
the input range of the internal DAC. The MAX1179 input
voltage range is ±5V, while the MAX1189 input voltage
PIN
15
16
17
18
19
20
21
22
23
24
25
26
27
28
16-Bit, 135ksps, Single-Supply ADCs with
REFADJ
RESET
NAME
DGND
DV
REF
_______________________________________________________________________________________
CS
D0
D1
D2
D3
D4
D5
D6
D7
DD
Detailed Description
Reference Buffer Output. Bypass REFADJ with a 0.1µF capacitor to AGND for internal reference
mode. Connect REFADJ to AV
Reference Input/Output. Bypass REF with a 10µF capacitor to AGND. REF is the external reference
input when in external reference mode.
Reset Input. Logic high resets the device.
Convert Start. The first falling edge of CS powers up the device and enables acquisition when R/C
is low. The second falling edge of CS starts conversion. The third falling edge of CS loads the result
onto the bus when R/C is high.
Digital Ground
Digital Supply Voltage. Bypass with a 0.1µF capacitor to DGND.
Three-State Digital Data Output (LSB)
Three-State Digital Data Output
Three-State Digital Data Output
Three-State Digital Data Output
Three-State Digital Data Output
Three-State Digital Data Output
Three-State Digital Data Output
Three-State Digital Data Output
Converter Operation
Analog Input
Input Scaler
Bipolar Analog Input Range
DD
to select external reference mode.
range is ±10V. The MAX1187 has a unipolar input volt-
age range of 0 to +10V. Figure 4 shows the equivalent
input circuit of the MAX1179/MAX1187/MAX1189. This
circuit limits the current going into or out of AIN to less
than 1.8mA.
Figure 1. Load Circuits
D0–D15
1mA
FUNCTION
A)
HIGH-Z TO V
V
V
OL
OH
TO V
TO HIGH-Z
Pin Description (continued)
DGND
OH
, AND
OH
,
C
LOAD
= 20pF
D0–D15
B)
HIGH-Z TO V
V
V
OH
OL
TO HIGH-Z
TO V
1mA
OL
, AND
OL
,
DV
DD
C
DGND
LOAD
= 20pF
7