19-1928; Rev 0; 1/01
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
________________General Description
____________________________Features
ꢀ Four Simultaneous-Sampling T/H Amplifiers with
Two Multiplexed Inputs (Eight Single-Ended
Inputs Total)
The MAX115/MAX116 are high-speed, multichannel,
12-bit data-acquisition systems (DAS) with simultane-
ous track/holds (T/Hs). These devices contain a 12-bit,
2µs, successive-approximation analog-to-digital con-
verter (ADC), a +2.5V reference, a buffered reference
input, and a bank of four simultaneous-sampling T/H
amplifiers that preserve the relative phase information
of the sampled inputs. The MAX115/MAX116 have two
multiplexed inputs for each T/H, allowing a total of eight
inputs. In addition, the converter is overvoltage tolerant
to 1ꢀV. A fault condition on any channel will not dam-
age the IC. Available input ranges are 5V (MAX115)
and 2.5V (MAX116).
ꢀ 2µs Conversion Time per Channel
ꢀ Throughput: 390ksps (1 Channel)
218ksps (2 Channels)
152ksps (3 Channels)
116ksps (4 Channels)
ꢀ Input Range: 5V (MAX115)
2.5V (MAX116)
ꢀ Fault-Protected Input Multiplexer ( 17V)
ꢀ Internal +2.5V or External Reference Operation
ꢀ Programmable On-Board Sequencer
ꢀ High-Speed Parallel DSP Interface
ꢀ Internal 10MHz Clock
The parallel interface’s data access and bus release
timing specifications are compatible with most popular
digital signal processors and 16-bit/32-bit microproces-
sors. The MAX115/MAX116 conversion results can be
accessed without resorting to wait-states.
________________________Applications
Ordering Information
Multiphase Motor Control
PART
TEMP. RANGE
PIN-PACKAGE
Power-Grid Synchronization
Power-Factor Monitoring
MAX115CAX
MAX115EAX
MAX116CAX
MAX116EAX
0°C to +ꢀ0°C
-40°C to +85°C
0°C to +ꢀ0°C
36 SSOP
36 SSOP
36 SSOP
36 SSOP
Digital Signal Processing
-40°C to +85°C
Vibration and Waveform Analysis
Typical Operating Circuit
Pin Configuration
TOP VIEW
A0
A1
CH1A
CH2B
CH2A
CH1B
CH1A
1
2
3
4
5
6
7
8
9
36 AGND
35 CH3B
34 CH3A
33 CH4B
32 CH4A
CH1B
D0/A2
CH2A
D1/A3
CH2B
D2
CH3A
CH3B
D3
D4
AV
DD
CH4A
MAX115
D5
MAX115
MAX116
REFIN
REFOUT
31 AV
SS
CH4B
MAX116
D6
D7
D8
D9
D10
D11
30 INT
+5V
AV
DD
AGND
29 CONVST
28 RD
0.1
F
D11 (MSB)
AGND
0.1
F
D10 10
D9 11
D8 12
D7 13
D6 14
D5 15
D4 16
27 WR
AV
SS
-5V
26 CS
+5V
0.1
REFIN
DV
DD
25 CLK
24 A0
0.1
F
F
23 A1
REFOUT
DGND
22 D0/A2 (LSB)
21 D1/A3
20 D2
4.7
F
CLK CONVST INT CS RD WR
DV
17
DD
16MHz
DGND 18
19 D3
CONTROL INTERFACE
SSOP
________________________________________________________________ Maxim Integrated Products
1
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or visit Maxim’s website at www.maxim-ic.com.
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