PIN ASSIGNMENTS
(MSB) D15 1
D14 2
D13 3
D12 4
D11 5
D10 6
D9 7
D8 8
CLK 9
DGND 10
AVEE 11
SPT5510
44-Pin
MQFP
PIN FUNCTIONS
33 DGND
32 D0 (LSB)
31 D1
30 D2
29 D3
28 D4
27 D5
26 D6
25 D7
24 DGND
23 AVEE
NAME
D15–D0
CLK
IOUT
IOUT
BGOUT
AMPINB
RSET
AMPOUT
REFIN
AMPB
AMPCC
AVEE
DGND
OGND
REFGND
FUNCTION
Digital Input Bits – all inputs high sends all
current to IOUT, none to IOUT
Clock – latches D flip-flops
Analog Current Output
Complementary Analog Current Output
Bandgap Voltage Reference
Ref Amp’s Inverting Input
Ref Amp’s Non-Inverting Input – connection for
reference-current-setting resistor, nominally
1kΩ to ground
Bias Voltage for Output Current Switches –
drives REFIN (on-chip 20 Ω resistor for
compensation)
Bias Voltage Node for Output Current Switches
– driven by AMPOUT
Used to Decouple Ref Amp’s Circuits to AVEE
AMPOUT plus on-chip 10 Ω series resistor for
compensation
Negative Supply – –5.2 V
Digital Ground Return
Output Ground Return
Reference Amplifier Ground Return
ORDERING INFORMATION
PART NUMBER
SPT5510SIM
TEMPERATURE RANGE
–40 to +85 °C
PACKAGE
44L MQFP
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
8
SPT5510
9/27/00