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General Desc ription
The MAX1205 is a 14-bit, monolithic, analog-to-digital
converter (ADC) capable of conversion rates up to
1Msps. This integrated circuit, built on a CMOS pro-
cess, uses a fully differential, pipelined architecture
with digital error correction and a short self-calibration
procedure that corrects for capacitor and gain mis-
matches and ensures 14-bit linearity at full sample
rates. An on-chip track/hold (T/H) maintains superb
dynamic performance up to the Nyquist frequency. The
MAX1205 operates from a single +5V supply.
The fully differential inputs allow an input swing of
±V
REF
. The reference is also differential, with the posi-
tive reference (RFPF) typically connected to +4.096V
and the negative reference (RFNF) connected to ana-
log ground. Additional sensing pins (RFPS, RFNS) are
provided to compensate for any resistive-divider action
that may occur due to finite internal and external resis-
tances in the reference traces and the on-chip resis-
tance of the reference pins. A single-ended input is
also possible using two operational amplifiers.
The power dissipation is typically 257mW at +5V, at a
sampling rate of 1Msps. The device employs a CMOS-
compatible, 14-bit parallel, two’s complement output
data format. For higher sampling rates, the MAX1201 is
a 2.2Msps pin-compatible upgrade to the MAX1205.
The MAX1205 is available in an MQFP package, and
operates over the commercial (0°C to +70°C) and the
extended (-40°C to +85°C) temperature ranges.
Applic ations
Imaging
Communications
Medical
Scanners
Data Acquisition
Features
o
Monolithic, 14-Bit, 1Msps ADC
o
+5V Single Supply
o
SNR of 80dB for f
IN
= 500kHz
o
SFDR of 87dB for f
IN
= 500kHz
o
Low Power Dissipation: 257mW
o
On-Demand Self-Calibration
o
Differential Nonlinearity Error: ±0.3LSB
o
Integral Nonlinearity Error: ±1.2LSB
o
Three-State, Two’s Complement Output Data
M
+5V S ingle-S upply, 1Msps, 14-Bit
S elf-Calibrating ADC
________________________________________________________________ Maxim Integrated Products
1
OE
DAV
CLK
DV
DD
DGND
DGND
DV
DD
TEST1
TEST2
TEST3
D0
ST_CAL
AGND
AV
DD
AGND
AGND
AV
DD
DOR
D13
D12
D11
D10
1
2
3
4
5
6
7
8
9
10
11
1
1
1
1
1
1
1
1
2
2
2
4
4
4
4
4
3
3
3
3
3
3
33
32
31
30
29
28
27
26
25
24
23
D
D
D
D
D
D
D
D
D
D
D
D
E
I
N
N
I
R
R
R
R
C
T
TOP VIEW
MQFP
MAX1205
19-4794; Rev 0; 11/98
EVALUATION KIT
AVAILABLE
PART
MAX1205CMH
MAX1205EMH
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
44 MQFP
44 MQFP
Pin Configuration
Ordering Information