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参数资料
| 型号： | TLC7528CDWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, 8 BITS INPUT LOADING, 0.1 us SETTLING TIME, 8-BIT DAC, PDSO20 |
| 封装： | GREEN, PLASTIC, SOIC-20 |
| 文件页数： | 21/25页 |
| 文件大小： | 631K |
| 代理商： | TLC7528CDWR |
TLC7528C, TLC7528E, TLC7528I
DUAL 8BIT MULTIPLYING
DIGITALTOANALOG CONVERTERS
SLAS062E JANUARY 1987 REVISED NOVEMBER 2008
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
operating characteristics over recommended operating free-air temperature range,
VrefA = VrefB = 10V, VOA and VOB at 0V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VDD = 5V
VDD = 15V
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
Linearity error
±1/2
LSB
Settling time (to 1/2LSB)
See Note 1
100
ns
Gain error
See Note 2
2.5
LSB
AC feedthrough
REFA to OUTA
See Note 3
65
dB
AC feedthrough
REFB to OUTB
See Note 3
65
dB
Temperature coefficient of gain
See Note 4
0.007
0.0035
%FSR/
°C
Propagation delay (from digital input to
90% of final analog output current)
See Note 5
80
ns
Channel-to-channel
REFA to OUTB
See Note 6
77
dB
Channel-to-channel
isolation
REFB to OUTA
See Note 7
77
dB
Digital-to-analog glitch impulse area
Measured for code transition from
00000000 to 11111111,
TA = +25°C
160
440
nVs
Digital crosstalk
Measured for code transition from
00000000 to 11111111,
TA = +25°C
30
60
nVs
Harmonic distortion
Vi = 6V,
f = 1kHz,
TA = +25°C
85
dB
NOTES:
1. OUTA, OUTB load = 100
, Cext = 13pF; WR and CS at 0V; DB0DB7 at 0V to VDD or VDD to 0V.
2. Gain error is measured using an internal feedback resistor. Nominal full scale range (FSR) = Vref 1LSB.
3. Vref = 20V peak-to-peak, 100kHz sine wave; DAC data latches loaded with 00000000.
4. Temperature coefficient of gain measured from 0
°C to +25°C or from +25°C to +70°C.
5. VrefA = VrefB = 10V; OUTA/OUTB load = 100, Cext = 13pF; WR and CS at 0V; DB0DB7 at 0V to VDD or VDD to 0V.
6. Both DAC latches loaded with 11111111; VrefA = 20V peak-to-peak, 100kHz sine wave; VrefB = 0; TA = +25°C.
7. Both DAC latches loaded with 11111111; VrefB = 20V peak-to-peak, 100kHz sine wave; VrefA = 0; TA = +25°C.
PRINCIPLES OF OPERATION
These devices contain two identical, 8-bit-multiplying DACs, DACA and DACB. Each DAC consists of an
inverted R-2R ladder, analog switches, and input data latches. Binary-weighted currents are switched between
DAC output and AGND, thus maintaining a constant current in each ladder leg independent of the switch state.
Most applications require only the addition of an external operational amplifier and voltage reference. A
simplified DAC circuit for DACA with all digital inputs low is shown in Figure 1.
Figure 2 shows the DACA equivalent circuit. A similar equivalent circuit can be drawn for DACB. Both DACs
share the analog ground terminal 1 (AGND). With all digital inputs high, the entire reference current flows to
OUTA. A small leakage current (IIkg) flows across internal junctions, and as with most semiconductor devices,
doubles every 10
°C. Co is due to the parallel combination of the NMOS switches and has a value that depends
on the number of switches connected to the output. The range of Co is 50pF to 120pF maximum. The equivalent
output resistance (ro) varies with the input code from 0.8R to 3R where R is the nominal value of the ladder
resistor in the R-2R network.
These devices interface to a microprocessor through the data bus, CS, WR, and DACA/DACB control signals.
When CS and WR are both low, the TLC7528 analog output, specified by the DACA/DACB control line,
responds to the activity on the DB0DB7 data bus inputs. In this mode, the input latches are transparent and
input data directly affects the analog output. When either the CS signal or WR signal goes high, the data on the
DB0DB7 inputs are latched until the CS and WR signals go low again. When CS is high, the data inputs are
disabled regardless of the state of the WR signal.
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| TLC7528CDWRG4 | 功能描述:数模转换器- DAC 8-Bit 0.1 us Dual MDAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| TLC7528CFN | 功能描述:数模转换器- DAC Dual 8bit Mult RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| TLC7528CFNG3 | 功能描述:数模转换器- DAC 8-Bit 0.1 us Dual MDAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| TLC7528CFNR | 功能描述:数模转换器- DAC 8-Bit 0.1 us Dual MDAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| TLC7528CFNRG3 | 功能描述:数模转换器- DAC 8-Bit 0.1 us Dual MDAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
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