TSA1204 Datasheet, PDF (1/20 Pages) STMicroelectronics – DUAL-CHANNEL, 12-BIT, 20MSPS, 120mW A/D CONVERTER

TSA1204
DUAL-CHANNEL, 12-BIT, 20MSPS, 120mW A/D CONVERTER
s 0.5Msps to 20Msps sampling frequency
s Adaptive power consumption: 120mW @
20Msps, 95mW@10Msps
s Single supply voltage: 2.5V
Independent supply for CMOS output stage
with 2.5V/3.3V capability
s ENOB=11.2 @ Nyquist
s SFDR= -81.5 dBc @ Nyquist
s 1GHz analog bandwidth Track-and-Hold
s Common clocking between channels
s Dual simultaneous Sample and Hold inputs
s Multiplexed outputs
s Built-in reference voltage with external bias
capability.
DESCRIPTION
The TSA1204 is a new generation of high speed,
dual-channel Analog to Digital converter pro-
cessed in a mainstream 0.25µm CMOS technolo-
gy yielding high performances and very low power
consumption.
The TSA1204 is specifically designed for applica-
tions requiring very low noise floor, high SFDR
and good isolation between channels. It is based
on a pipeline structure and digital error correction
to provide excellent static linearity and over 11.2
effective bits at Fs=20Msps, and Fin=10MHz.
For each channel, a voltage reference is integrat-
ed to simplify the design and minimize external
components. It is nevertheless possible to use the
circuit with external references.
Each ADC outputs are multiplexed in a common
bus with small number of pins. A tri-state capabili-
ty is available for the outputs, allowing chip selec-
tion. The inputs of the ADC must be differentially
driven.
The TSA1204 is available in extended (-40 to
+85°C) temperature range, in a small 48 pins
TQFP package.
APPLICATIONS
s Medical imaging and ultrasound
s 3G base station
s I/Q signal processing applications
s High speed data acquisition system
s Portable instrumentation
ORDER CODE
Part Number
Temperature
Range
TSA1204IF
TSA1204IFT
EVAL1204/BA
-40°C to +85°C
-40°C to +85°C
February 2003
Package Conditioning Marking
TQFP48
Tray
TQFP48 Tape & Reel
Evaluation board
SA1204I
SA1204I
PIN CONNECTIONS (top view)
index
corner
AGND 1
INI 2
AGND ³
INIB 4
AGND 5
IPOL 6
AVCCB ⁷
AGND 8
INQ 9
AGND 10
INBQ 11
AGND 12
48 47 46 45 44 43 42 41 40 39 38 37
36 ^D2
35 D3
34 ^D4
33 D5
32 D6
TSA1204
31 D7
30 D8
29 D9
28 D10
27 D11(MSB)
26 VCCBE
25 GNDBE
13 14 15 16 17 18 19 20 21 22 23 24
BLOCK DIAGRAM
+2.5V/3.3V
CLK SELECT OEB VCCBE
VINI
VINBI
VINCMI
VREFPI
VREFMI
IPOL
VREFPQ
VREFMQ
VINCMQ
VINQ
VINBQ
AD 12
I channel
common mode
REF I
Polar.
REF Q
common mode
AD 12
Q channel
Timing
12
M ¹²
12 _D0
U
Buffers
TO
X
D11
12
GND
GNDBE
PACKAGE
7 × 7 mm TQFP48
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