SPT5420 Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – 13-BIT, OCTAL D/A CONVERTER

FEATURES
• 13-bit resolution
• Pin compatible with AD7839
• Eight DACs in one package
• Buffered voltage outputs
• Wide output voltage swing V _DD–2.5 V to V_SS+2.5 V
• 15 µs settling time to ±0.5 LSB
• Double-buffered digital inputs
• Microprocessor and TTL/CMOS compatible
SPT5420
13-BIT, OCTAL D/A CONVERTER
APPLICATIONS
• Automatic test equipment
• Instrumentation
• Process control
TECHNICAL DATA
JUNE 26, 2001
GENERAL DESCRIPTION
The SPT5420 contains eight 13-bit digital-to-analog
CMOS converters designed primarily for automatic test
equipment applications. It uses novel circuit topology to
convert the 13-bit digital inputs into output voltages which
are proportionate to the applied reference voltages. Each
DAC’s full-scale output voltage and output voltage offset
are adjustable with analog inputs (RGND, V_REFB, V_REFT).
The SPT5420 operates over an industrial temperature
range of –40 °C to +85 °C and is available in a 10 x 10 mm,
44-lead metric quad flat pack (MQFP) plastic package.
BLOCK DIAGRAM
VREFT01 VREFB01
13
13
13
D0–D12
WR
CS
A0–A2
LDAC
13
13
13
Control
Logic
8
13
LEA0–LEA7
LDAC
13
13
D _0A Q
LE
LEA0
D _1A Q
LE
LEA1
D _2A Q
LE
LEA2
D _3A Q
LE
LEA3
D _4A Q
LE
LEA4
D _5A Q
LE
LEA5
D _6A Q
LE
LEA6
D _7A Q
LE
LEA7
13
D _0B Q
LE
LDAC
13
D _1B Q
LE
LDAC
13
D _2B Q
LE
LDAC
13
D _3B Q
LE
LDAC
13
D _4B Q
LE
LDAC
13
D _5B Q
LE
LDAC
13
D _6B Q
LE
LDAC
13
D _7B Q
LE
LDAC
DAC0
DAC1
DAC2
DAC3
DAC4
DAC5
DAC6
DAC7
VREFT2345 V_REFB2345 V_REFT67 VREFB67
RGND23 RGND01
-
+
-
+
-
+
-
+
+
-
+
-
+
-
+
-
CLR
RGND45 RGND67
VOUT0
VOUT1
VOUT2
VOUT3
VOUT4
VOUT5
VOUT6
VOUT7