MAX1177 Datasheet, PDF (6/13 Pages) Maxim Integrated Products – 16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input Range

16-Bit, 135ksps, Single-Supply ADC
with to 10V Input Range
Pin Description
PIN
NAME
FUNCTION
1
D4/D12 Tri-State Digital-Data Output
2
D5/D13 Tri-State Digital-Data Output
3
D6/D14 Tri-State Digital-Data Output
4
D7/D15 Tri-State Digital-Data Output. D15 is the MSB.
Read/Convert Input. Power up and put the device in acquisition mode by holding R/C low during the
first falling edge of CS. During the second falling edge of CS, the level on R/C determines whether the
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R/C
reference and reference buffer power down or remain on after conversion. Set R/C high during the
second falling edge of CS to power down the reference and buffer, or set R/C low to leave the
reference and buffer powered up. Set R/C high during the third falling edge of CS to put valid data on
the bus.
6
EOC
End of Conversion. EOC drives low when conversion is complete.
7
AV_DD Analog Supply Input. Bypass with a 0.1µF capacitor to AGND.
8
AGND Analog Ground. Primary analog ground (star ground).
9
AIN
Analog Input
10
AGND Analog Ground. Connect pin 10 to pin 8.
11
REFADJ ^{Reference Buffer Output. Bypass REFADJ with a 0.1µF capacitor to AGND for internal reference}
mode. Connect REFADJ to AV_DD to select external reference mode.
12
REF
Reference Input/Output. Bypass REF with a 10µF capacitor to AGND for internal reference mode.
External reference input when in external reference mode.
High-Byte Enable Input. Used to multiplex the 16-bit conversion result.
13
HBEN 1: MSB available on the data bus.
0: LSB available on the data bus.
Convert Start. The first falling edge of CS powers up the device and enables acquire mode when R/C
14
CS
is low. The second falling edge of CS starts the conversion. The third falling edge of CS loads the
result onto the bus when R/C is high.
15
DGND Digital Ground
16
DV_DD Digital Supply Voltage. Bypass with a 0.1µF capacitor to DGND.
17
D0/D8 Tri-State Digital-Data Output. D0 is the LSB.
18
D1/D9 Tri-State Digital-Data Output
19
D2/D10 Tri-State Digital-Data Output
20
D3/D11 Tri-State Digital-Data Output
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