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参数资料
| 型号： | LTC2754BIUKG-16#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 27/28页 |
| 文件大小： | 0K |
| 描述： | IC DAC 16BIT QUAD IOUT 52-QFN |
| 标准包装： | 2,000 |
| 系列： | SoftSpan™ |
| 设置时间： | 2µs |
| 位数： | 16 |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 4 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 52-WFQFN 裸露焊盘 |
| 供应商设备封装： | 52-QFN（7x8）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 8 电流，单极；8 电流，双极 |
| 采样率（每秒）： | * |
| 配用： | DC1546A-ND - BOARD DAC LTC2754-16 |
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LTC2754
8
2754f
PIN FUNCTIONS
GEADJA (Pin1): Gain Adjust Pin for DAC A. This control
pin can be used to null gain error or to compensate for
reference errors. Nominal adjustment range is ±512 LSB
(LTC2754-16) for a voltage input range of ±VRINA (i.e., ±5V
for a 5V reference input). Tie to ground if not used.
RINA (Pin 2): Input Resistor for Reference Inverting
Amplier. The 20k input resistor is connected internally
from RINA to RCOMA. For normal operation tie RINA to the
external reference voltage VREFA(seeTypicalApplications).
Any or all of these precision-matched resistor sets (Each
set comprising RINX, RCOMX and REFX) may be used to
invert one or more positive reference voltages to the nega-
tive voltages needed by the DACs. Typically 5V; accepts
up to ±15V.
IOUT2A (Pin 3): DAC A Current Output Complement. Tie
IOUT2A to ground.
GND (Pin 4): Ground; provides shielding for IOUT2A. Tie
to ground.
CS/LD (Pin 5): Synchronous Chip Select and Load Pin.
SDI (Pin 6): Serial Data Input. Data is clocked in on the
rising edge of the serial clock (SCK) when CS/LD is low.
SCK (Pin 7): Serial Clock.
SRO (Pin 8): Serial Readback Output. Data is clocked out
on the falling edge of SCK. Readback data begins clocking
out after the last address bit A0 is clocked in. SRO is an
active output only when the chip is selected (i.e., when
CS/LD is low). Otherwise SRO presents a high-impedance
output in order to allow other parts to control the bus.
SROGND (Pin 9): Ground pin for SRO. Tie to ground.
VDD (Pin 10): Positive Supply Input; 2.7V ≤ VDD ≤ 5.5V. By-
pass with a 0.1μF low-ESR ceramic capacitor to ground.
GND (Pin 11): Ground. Tie to ground.
IOUT2D (Pin 12): DAC D Current Output Complement. Tie
IOUT2D to ground.
RIND (Pin 13): Input Resistor for Reference Inverting
Amplier. The 20k input resistor is connected inter-
nally from RIND to RCOMD. For normal operation tie RIND
to the external reference voltage VREFD (see Typical
Applications). Any or all of these precision-matched resis-
tor sets (Each set comprising RINX, RCOMX and REFX) may
be used to invert one or more positive reference voltages
to the negative voltages needed by the DACs. Typically
5V; accepts up to ±15V.
GEADJD (Pin 14): Gain Adjust Pin for DAC D. This control
pin can be used to null gain error or to compensate for
reference errors. Nominal adjustment range is ±512 LSB
(LTC2754-16) for a voltage input range of ±VRIND (i.e., ±5V
for a 5V reference input). Tie to ground if not used.
RCOMD (Pin 15): Center Tap Point for Reference Amplier
Inverting Resistors. The 20k reference inverting resistors
are connected internally from RIND to RCOMD and from
RCOMD to REFD, respectively (see Block Diagram). For
normal operation tie RCOMDtothenegativeinputofexternal
reference inverting amplier (see Typical Applications).
REFD (Pin 16): Inverted Reference Voltage for DAC D, with
internal connection to the reference inverting resistor. The
20k resistor is connected internally from REFD to RCOMD.
For normal operation tie this pin to the output of reference
inverting amplier (see Typical Applications). Typically –5V;
accepts up to ±15V. The impedance looking into this pin
is 10k to ground (RIND and RCOMD oating).
ROFSD (Pin 17): Bipolar Offset Network for DAC D. This
pin provides the translation of the output voltage range for
bipolar spans. Accepts up to ±15V; for normal operation
tie to the positive reference voltage at RIND (Pin 13). The
impedance looking into this pin is 20k to ground.
RFBD (Pin 18): DAC D Feedback Resistor. For normal
operation tie to the output of the I/V converter amplier
for DAC D (see Typical Applications). The DAC output
current from IOUT1D ows through the feedback resistor
to the RFBD pin. The impedance looking into this pin is
10k to ground.
IOUT1D (Pin 19): DAC D Current Output. This pin is a
virtual ground when the DAC is operating and should
reside at 0V. For normal operation tie to the negative
input of the I/V converter amplier for DAC D (see Typi-
cal Applications).
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