Rainbow Electronics MAX117 - Manual

_______________General Description
The MAX113/MAX117 are microprocessor-compatible,
8-bit, 4-channel and 8-channel analog-to-digital con-
verters (ADCs). They operate from a single +3V supply
and use a half-flash technique to achieve a 1.8µs con-
version time (400ksps). A power-down pin (
PWRDN)
reduces current consumption to 1µA typical. The
devices return from power-down mode to normal oper-
ating mode in less than 900ns, allowing large supply-
current reductions in burst-mode applications. (In burst
mode, the ADC wakes up from a low-power state at
specified intervals to sample the analog input signals.)
Both converters include a track/hold, enabling the ADC
to digitize fast analog signals.
Microprocessor (µP) interfaces are simplified because
the ADC can appear as a memory location or I/O port
without external interface logic. The data outputs use
latched, three-state buffer circuitry for direct connection
to an 8-bit parallel µP data bus or system input port.
The MAX113/MAX117 input/reference configuration
enables ratiometric operation.
The 4-channel MAX113 is available in a 24-pin DIP or
SSOP. The 8-channel MAX117 is available in a 28-pin
DIP or SSOP. For +5V applications, refer to the
MAX114/MAX118 data sheet.
________________________Applications
Battery-Powered Systems Portable Equipment
System-Health Monitoring Remote Data Acquisition
Communications Systems
____________________________Features
♦ +3.0V to +3.6V Single-Supply Operation
♦ 4 (MAX113) or 8 (MAX117) Analog Input Channels
♦ Low Power: 1.5mA (operating mode)
1µA (power-down mode)
♦ Total Unadjusted Error
≤
1LSB
♦ Fast Conversion Time: 1.8µs per Channel
♦ No External Clock Required
♦ Internal Track/Hold
♦ Ratiometric Reference Inputs
♦ Internally Connected 8th Channel Monitors
Reference Voltage (MAX117)
MAX113/MAX117
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
________________________________________________________________ Maxim Integrated Products 1
4-BIT
DAC
4-BIT
FLASH
ADC
(4MSBs)
4-BIT
FLASH
ADC
(4LSBs)
TIMING AND
CONTROL
ADDRESS
LATCH
DECODE
REF+
16
THREE-
STATE
OUTPUT
DRIVERS
D7
D6
D5
D4
D3
D2
D1
D0
MUX
*IN7
*IN8
Σ
REF+
*IN6
*IN5
IN4
IN3
IN2
IN1
A0 A1 A2 REF- PWRDN RD
MODE INT WR/RDY
CS
MAX113/MAX117
*MAX117 ONLY
_________________________________________________________Functional Diagram
19-1081; Rev 1; 8/96
PART
MAX113 CNG
MAX113CAG
MAX113C/D 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
24 Narrow Plastic DIP
24 SSOP
Dice*
______________Ordering Information
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX113ENG
MAX113EAG
MAX113MRG -55°C to +125°C
-40°C to +85°C
-40°C to +85°C 24 Narrow Plastic DIP
24 SSOP
24 Narrow CERDIP**
Ordering Information continued at end of data sheet.
*Dice are specified at T A = +25°C, DC parameters only.
**Contact factory for availability.
Pin Configuration appears at end of data sheet.