LTC2704-14 Linear Technology Corporation, LTC2704-14 Datasheet - Page 9

• Manufacturer Part Number: LTC2704-14
• Description: Ltc2704-14 - Quad 14-bit Voltage Output Softspan Dac With Readback
• Manufacturer: Linear Technology Corporation

PI FU CTIO S
C1D (Pin 18): Feedback Capacitor Connection for DAC D
Output. This pin provides direct access to the negative
input of the channel D output amplifier.
VOSD (Pin 19): Offset Adjust for DAC D. Nominal input
range is ±5V. V
±2.5V modes]. See Operation section.
AGNDD (Pin 20): DAC D Signal Ground. High impedance
input, does not carry supply currents. Tie to clean analog
ground.
REFG2 (Pin 21): Reference 2 Ground. High impedance
input, does not carry supply currents. Tie to clean analog
ground.
REFM2 (Pin 23): Reference 2 Inverting Amp Output. The
gain from REF2 to REFM2 is –1. Can swing to within 0.5V
of the analog supplies V
REF2 (Pin 24): DAC C and DAC D Reference Input.
V
Typically 15V. 4.5V to 16.5V Range. Can be different from
V
AGNDC (Pin 26): DAC C Signal Ground. High impedance
input, does not carry supply currents. Tie to clean analog
ground.
VOSC (Pin 27): Offset Adjust for DAC C. Nominal input
range is ±5V. V
±2.5V modes]. See Operation section.
C1C (Pin 28): Feedback Capacitor Connection for DAC C
Output. This pin provides direct access to the negative
input of the channel C output amplifier.
OUTC (Pin 29): DAC C Voltage Output Pin. For best load
regulation, this open-loop amplifier output is connected to
RFBC as close to the load as possible.
+
+
2
1
U
.
(Pin 25): Analog Positive Supply for DACs C and D.
U
OS
OS
(DAC D) = –0.01• V(VOSD) [0V to 5V,
(DAC C) = –0.01• V(VOSC) [0V to 5V,
U
+
/V
–
.
RFBC (Pin 30): DAC C Output Feedback Resistor Pin.
AGND (Pin 32): Analog Ground Pin. Tie to clean analog
ground.
GND (Pin 33): Ground Pin. Tie to clean analog ground.
V
RFLAG (Pin 35): Reset Flag Pin. An active low output is
asserted when there is a power on reset or a clear event.
Returns high when an update command is executed.
RFBB (Pin 37): DAC B Output Feedback Resistor Pin.
OUTB (Pin 38): DAC B Voltage Output Pin. For best load
regulation, this open-loop amplifier output is connected to
RFBB as close to the load as possible.
C1B (Pin 39): Feedback Capacitor Connection for DAC B
Output. This pin provides direct access to the negative
input of the channel B output amplifier.
VOSB (Pin 40): Offset Adjust for DAC B. Nominal input
range is ±5V. V
±2.5V modes]. See Operation section.
AGNDB (Pin 41): DAC B Signal Ground. High impedance
input, does not carry supply currents. Tie to clean analog
ground.
V
Typically 15V. 4.5V to 16.5V Range. Can be different from
V
REF1 (Pin 43): DAC A and DAC B Reference Input.
REFM1 (Pin 44): Reference 1 Inverting Amp Output. The
gain from REF1 to REFM1 is –1. Can swing to within 0.5V
of the analog supplies V
DD
+
+
1
2
.
(Pin 42): Analog Positive Supply for DACs A DND B.
(Pin 34): Logic Supply. 2.7V to 5.5V Range.
OS
(DAC B) = –0.01 • V(VOSB) [0V to 5V,
+
/V
–
.
LTC2704
9
2704f