SPT7721 Просмотр технического описания (PDF) - Signal Processing Technologies
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SPT7721 Datasheet PDF : 11 Pages
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PIN ASSIGNMENTS
AGND
1
PD
2
CLK
3
CLK
4
RESET
5
RESET
6
OVDD
7
DGND
8
DA7 (MSB)
9
DA6
10
DA5
11
SPT7721
TOP VIEW
44L TQFP
PIN FUNCTIONS
Pin Name Description
VIN+
Non-Inverted Analog Input; nominally 1 VP-P;
100k pullup to VCC and 100k pulldown to AGND,
internally
33
AGND
VIN–
32
DMODE1
Inverted Analog Input; nominally 1 VP-P; 100k
pullup to VCC and 100k pulldown to AGND,
internally
31
DMODE2 DA0–DA7 Data output; Bank A. 3 V / 5 V LVCMOS
30
OVDD
compatible.
29
DGND
28
DCLKOUT
DB0–DB7
Data output; Bank B. 3 V / 5 V LVCMOS
compatible.
27
26
DCLKOUT
DB7 (MSB)
DCLKOUT
Non-Inverted data output clock. 3 V / 5 V
LVCMOS compatible.
25
DB6
24
DB5
DCLKOUT Inverted data output clock. 3 V / 5 V LVCMOS
compatible.
23
DB4
CLK
Non-Inverted clock input pin; 100k pulldown to
AGND, internally
CLK
Inverted clock input pin; 17.5k pullup to VCC and
7.5k pulldown to AGND, internally
RESET
RESET synchronizes the data sampling and data
output bank relationship when in Dual Channel
Mode (DMODE1 = 0); 17.5k pullup to VCC and
7.5k pulldown to AGND, internally
RESET
Inverted RESET input pin
DMODE1,2
Internally:
100k pulldown to AGND on DMODE1
50k pullup to VCC on DMODE2
Data Output Mode pins:
DMODE1 = 0, DMODE2 = 0: Parallel Dual
Channel Output
DMODE1 = 0, DMODE2 = 1: Interleaved Dual
Channel Output
DMODE1 = 1, DMODE2 = X: Single Channel
Data Output on Bank A (125 MSPS max)
PD
Power Down pin; PD = 1 for power-down mode.
Outputs set to high impedance in power-down
mode; 100k pulldown to AGND, internally
VCM
2.5 V Common Mode Voltage Reference Output
AVCC
OVDD
AGND
+5 V Analog Supply
+3 V / +5 V Digital Output Supply
Analog Ground
DGND
Digital Ground
ORDERING INFORMATION
PART NUMBER
SPT7721SIT
TEMPERATURE RANGE
–40 to +85 °C
PACKAGE
44L TQFP
Signal Processing Technologies, Inc. reserves the right to change products and specifications without notice. Permission is hereby
expressly granted to copy this literature for informational purposes only. Copying this material for any other use is strictly prohibited.
WARNING – LIFE SUPPORT APPLICATIONS POLICY – SPT products should not be used within Life Support Systems without the
specific written consent of SPT. A Life Support System is a product or system intended to support or sustain life which, if it fails, can
be reasonably expected to result in significant personal injury or death.
Signal Processing Technologies believes that ultrasonic cleaning of its products may damage the wire bonding, leading to
device failure. It is therefore not recommended, and exposure of a device to such a process will void the product warranty.
SPT
11
SPT7721
2/20/01
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