THS12082
12-BIT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTERS
SLAS271B – MAY 2000 – REVISED DECEMBER 2002
DA PACKAGE
(TOP VIEW)
features
Simultaneous Sampling of 2 Single-Ended
Signals or 1 Differential Signal
D0
D1
D2
D3
D4
D5
OV_FL
RESET
AINP
1
32
31
30
29
28
27
26
25
24
23
22
Integrated 16 Word FIFO
2
Signal-to-Noise and Distortion Ratio: 66 dB
3
AINM
at f = 2 MHz
4
I
REFIN
REFOUT
REFP
5
Differential Nonlinearity Error: ±1 LSB
Integral Nonlinearity Error: ±1.5 LSB
Auto-Scan Mode for 2 Inputs
6
BV
7
DD
BGND
D6
REFM
AGND
8
3-V or 5-V Digital Interface Compatible
Low Power: 216 mW Max
9
D7
AV
10
11
DD
D8
CS0
5-V Analog Single Supply Operation
D9 12
RA0/D10 13
RA1/D11 14
21 CS1
Internal Voltage References . . . 50 PPM/°C
and ±5% Accuracy
20 WR (R/W)
19 RD
Parallel µC/DSP Interface
15
16
18
17
CONV_CLK (CONVST)
DATA_AV
DV
DD
DGND
applications
Radar Applications
Communications
Control Applications
High-Speed DSP Front-End
Automotive Applications
description
The THS12082 is a CMOS, low-power, 12-bit, 8 MSPS analog-to-digital converter (ADC). The speed,
resolution, bandwidth, and single-supply operation are suited for applications in radar, imaging, high-speed
acquisition, and communications. A multistage pipelined architecture with output error correction logic provides
for no missing codes over the full operating temperature range. Internal control registers allow for programming
the ADC into the desired mode. The THS12082 consists of two analog inputs, which are sampled
simultaneously. These inputs can be selected individually and configured to single-ended or differential inputs.
An integrated 16 word deep FIFO allows the storage of data in order to take the load off of the processor
connected to the ADC. Internal reference voltages for the ADC (1.5 V and 3.5 V) are provided.
An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the
application. Two different conversion modes can be selected. In the single conversion mode, a single and
simultaneousconversion can be initiated by using the single conversion start signal (CONVST). The conversion
clock in the single conversion mode is generated internally using a clock oscillator circuit. In the continuous
conversion mode, an external clock signal is applied to the CONV_CLK input of the THS12082. The internal
clock oscillator is switched off in the continuous conversion mode.
The THS12082C is characterized for operation from 0°C to 70°C, and the THS12082I is characterized for
operation from –40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2002, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
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