Datasheet

MAX153 1Msps, µP-Compatible,
8-Bit ADC with 1µA Power-Down
www.maximintegrated.com
Maxim Integrated │ 7
Pin Description
Pin Conguration
*See the Digital Interface section.
PIN NAME FUNCTION
1 V
IN
AnalogInput.RangeisV
REF
- > V
IN
< V
REF+
.
2 D0 Three-StateDataOutput(LSB)
3–5 D1–D3 Three-StateDataOutputs
6 WR/RDY WRITEControlInput/READYStatusOutput*
7 MODE
MODESelectionInput.Internallypulledlowwitha50µAcurrentsource.
MODE=0activatesreadmode.
MODE=1activeswrite-readmode*
8 RD READ Input. Must be low to access data*.
9 INT INTERRUPT Output goes low to indicate end of conversion*.
10 GND Ground
11 V
REF-
LowerLimitofReferenceSpan.Setsthezero-codevoltage.RangeisV
SS
< V
REF-
< V
REF+
.
12 V
REF+
UpperLimittoReferenceSpan.Setsthefull-scaleinputvoltage.RangeisV
REF-
< V
REF+
< V
DD
.
13 CS CHIP SELECT Input. Must be low for the device to recognize WR or RD inputs.
14–16 D4–D6 Three-StateDataOutputs
17 D7 Three-StateDataOutput(MSB)
18 PWRDN POWERDOWNInput.Reducessupplycurrentwhenlow.CS must be high during power-down.
19 V
SS
NegativeSupply.Unipolar:V
SS
=0V,Bipolar:V
SS
= -5V.
20 V
DD
PositiveSupply,+5V
20
19
18
17
16
15
13
1
2
3
4
5
6
8
V
DD
V
SS
PWRDN
D7 (MSB)
D2
D1
D0 (LSB)
V
IN
TOP VIEW
MAX153
D6
D5
CS
RD
WR/RDY
14
7
D4
MODE
11
10
V
REF-
GND
12
9
V
REF+
INT
D3
PDIP/SO(W)/SSOP
+