LTC1591-1IG [Linear]
14-Bit and 16-Bit Parallel Low Glitch Multiplying DACs with 4-Quadrant Resistors; 14位和16位并行低干扰乘法数模转换器与4象限电阻型号: | LTC1591-1IG |
厂家: | Linear |
描述: | 14-Bit and 16-Bit Parallel Low Glitch Multiplying DACs with 4-Quadrant Resistors |
文件: | 总20页 (文件大小:389K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LTC1591/LTC1597
14-Bit and 16-Bit Parallel
Low Glitch Multiplying DACs
with 4-Quadrant Resistors
DESCRIPTION
U
FEATURES
The LTC®1591/LTC1597 are pin compatible, parallel input
14-bit and 16-bit multiplying current output DACs that oper-
atefromasingle5Vsupply.INLandDNLareaccurateto1LSB
over the industrial temperature range in both 2- and 4-
quadrant multiplying modes. True 16-bit 4-quadrant multi-
plication is achieved with on-chip 4-quadrant multiplication
resistors.
■
True 16-Bit Performance Over Industrial
Temperature Range
DNL and INL: 1LSB Max
On-Chip 4-Quadrant Resistors Allow Precise 0V to
10V, 0V to –10V or ±10V Outputs
Pin Compatible 14- and 16-Bit Parts
Asynchronous Clear Pin
■
■
■
■
LTC1591/LTC1597: Reset to Zero Scale
LTC1591-1/LTC1597-1: Reset to Midscale
Glitch Impulse < 2nV-s
TheseDACsincludeaninternaldeglitchercircuitthatreduces
theglitchimpulsetolessthan2nV-s(typ).Theasynchronous
CLR pin resets the LTC1591/LTC1597 to zero scale and
LTC1591-1/LTC1597-1 to midscale.
■
■
■
■
28-Lead SSOP Package
Low Power Consumption: 10µW Typ
The LTC1591/LTC1597 are available in 28-pin SSOP and
PDIPpackagesandarespecifiedovertheindustrialtempera-
ture range.
Power-On ResetU
APPLICATIONS
For serial interface 16-bit current output DACs refer to the
LTC1595/LTC1596 data sheet.
■
Process Control and Industrial Automation
■
Direct Digital Waveform Generation
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
Software-Controlled Gain Adjustment
■
Automatic Test Equipment
U
LTC1591/LTC1591-1 Integral Nonlinearity
1.0
TYPICAL APPLICATION
0.8
0.6
16-Bit, 4-Quadrant Multiplying DAC with a
Minimum of External Components
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
V
REF
5V
+
0.1µF
LT®1468
–
15pF
0
8192
12288
4096
16383
DIGITAL INPUT CODE
5
3
2
1
23
4
1591/97 TA02
R1
R
REF
V
CC
R
R
COM
R2
OFS
FB
15pF
LTC1597/LTC1597-1 Integral Nonlinearity
1.0
R
R
OFS
FB
R1
I
0.8
0.6
–
OUT1
6
V
=
OUT
–V
16
LTC1597-1
LT1468
DATA
16-BIT DAC
REF
0.4
+
TO V
AGND
22
INPUTS
7
REF
0.2
10 TO 21,
24 TO 27
DGND
0
–0.2
–0.4
–0.6
–0.8
–1.0
WR LD CLR
28
1591/97 TA01
9
8
WR
LD
CLR
0
32768
49152
16384
65535
DIGITAL INPUT CODE
1591/97 TA03
1
LTC1591/LTC1597
W W U W
ABSOLUTE MAXIMUM RATINGS (Note 1)
VCC to AGND............................................... – 0.5V to 7V
Operating Temperature Range
V
CC to DGND .............................................. –0.5V to 7V
LTC1591C/LTC1591-1C
AGND to DGND............................................. VCC + 0.5V
DGND to AGND............................................. VCC + 0.5V
REF, ROFS, RFB, R1, RCOM to AGND, DGND .......... ±25V
Digital Inputs to DGND ............... –0.5V to (VCC + 0.5V)
IOUT1 to AGND ............................ –0.5V to( VCC + 0.5V)
Maximum Junction Temperature .......................... 125°C
LTC1597C/LTC1597-1C.......................... 0°C to 70°C
LTC1591I/LTC1591-1I
LTC1597I/LTC1597-1I ....................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
U
W U
PACKAGE/ORDER INFORMATION
ORDER PART
ORDER PART
NUMBER
NUMBER
TOP VIEW
TOP VIEW
REF
1
2
3
4
5
6
7
8
9
28 CLR
27 NC
26 NC
25 D0
24 D1
REF
1
2
3
4
5
6
7
8
9
28 CLR
27 D0
26 D1
25 D2
24 D3
LTC1591CG
LTC1591CN
LTC1591IG
LTC1597ACG
LTC1597ACN
LTC1597BCG
LTC1597BCN
LTC1597-1ACG
LTC1597-1ACN
LTC1597-1BCG
LTC1597-1BCN
LTC1597AIG
R
R
I
COM
R1
COM
R1
R
R
OFS
OFS
LTC1591IN
R
FB
R
FB
I
23
V
23
V
CC
LTC1591-1CG
LTC1591-1CN
LTC1591-1IG
LTC1591-1IN
OUT1
CC
OUT1
AGND
22 DGND
21 D2
20 D3
19 D4
18 D5
17 D6
16 D7
15 D8
AGND
22 DGND
21 D4
20 D5
19 D6
18 D7
17 D8
16 D9
15 D10
LD
LD
WR
WR
D13 10
D12 11
D11 12
D10 13
D9 14
D15 10
D14 11
D13 12
D12 13
D11 14
LTC1597AIN
LTC1597BIG
LTC1597BIN
G PACKAGE
N PACKAGE
G PACKAGE
N PACKAGE
LTC1597-1AIG
LTC1597-1AIN
LTC1597-1BIG
LTC1597-1BIN
28-LEAD PLASTIC SSOP 28-LEAD NARROW PDIP
28-LEAD PLASTIC SSOP 28-LEAD NARROW PDIP
TJMAX = 125°C, θJA = 95°C/ W (G)
JMAX = 125°C, θJA = 70°C/ W (N)
TJMAX = 125°C, θJA = 95°C/ W (G)
JMAX = 125°C, θJA = 70°C/ W (N)
T
T
Consult factory for Military grade parts.
2
LTC1591/LTC1597
ELECTRICAL CHARACTERISTICS
VCC = 5V ±10%, VREF = 10V, IOUT1 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise noted.
LTC1591/-1 LTC1597B/-1B
MIN TYP MAX MIN TYP MAX MIN TYP MAX
LTC1597A/-1A
SYMBOL PARAMETER
Accuracy
CONDITIONS
UNITS
Resolution
●
●
14
14
16
16
16
16
Bits
Bits
Monotonicity
INL
DNL
GE
Integral Nonlinearity
(Note 2) T = 25°C
±1
±1
± 2
±2
±0.25 ±1
±0.35 ±1
LSB
LSB
A
T
to T
●
●
MIN
MAX
Differential Nonlinearity
Gain Error
T = 25°C
± 1
±1
±1
±1
±0.2 ±1
±0.2 ±1
LSB
LSB
A
T
to T
MIN
MAX
Unipolar Mode
(Note 3) T = 25°C
±4
±6
±16
±24
2
3
±16
±16
LSB
LSB
A
T
to T
●
MIN
MAX
Bipolar Mode
(Note 3) T = 25°C
±4
±6
±16
±24
2
3
±16
± 16
LSB
LSB
A
T
to T
●
●
MIN
MAX
Gain Temperature Coefficient (Note 4) ∆Gain/∆Temperature
1
2
1
2
1
2
ppm/°C
Bipolar Zero-Scale Error
T = 25°C
± 3
± 5
± 10
± 16
± 5
± 8
LSB
LSB
A
T
to T
●
MIN
MAX
I
OUT1 Leakage Current
(Note 5) T = 25°C
±5
±15
±5
±15
±5
±15
nA
nA
LKG
A
T
to T
●
●
MIN
MAX
PSRR
Power Supply Rejection Ratio
V
= 5V ±10
±0.1 ±1
±0.4 ±2
±0.4 ±2
LSB/V
CC
VCC = 5V ±10%, VREF = 10V, IOUT1 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Input
R
DAC Input Resistance (Unipolar)
R1/R2 Resistance (Bipolar)
(Note 6)
●
●
●
4.5
9
6
12
12
10
20
20
kΩ
kΩ
kΩ
REF
R1/R2
, R
(Notes 6, 13)
(Note 6)
R
Feedback and Offset Resistances
9
OFS FB
AC Performance (Note 4)
Output Current Settling Time
(Notes 7, 8)
(Note 12)
(Note 9)
1
2
µs
nV-s
nV-s
Midscale Glitch Impulse
Digital-to-Analog Glitch Impulse
Multiplying Feedthrough Error
Total Harmonic Distortion
Output Noise Voltage Density
1
V
= ±10V, 10kHz Sine Wave
1
mV
P-P
REF
THD
(Note 10)
(Note 11)
108
10
dB
nV/√Hz
Harmonic Distortion
(Digital Waveform Generation)
Unipolar Mode (Note 14)
2nd Harmonic
3rd Harmonic
SFDR
94
101
94
dB
dB
dB
Bipolar Mode (Note 14)
2nd Harmonic
3rd Harmonic
SFDR
94
101
94
dB
dB
dB
3
LTC1591/LTC1597
ELECTRICAL CHARACTERISTICS
VCC = 5V ±10%, VREF = 10V, IOUT1 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise noted.
SYMBOL
Analog Outputs (Note 4)
Output Capacitance (Note 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
C
OUT
DAC Register Loaded to All 1s: C
DAC Register Loaded to All 0s: C
●
●
115
70
130
80
pF
pF
OUT1
OUT1
Digital Inputs
V
V
Digital Input High Voltage
Digital Input Low Voltage
Digital Input Current
●
●
●
●
2.4
V
V
IH
IL
0.8
±1
8
I
0.001
µA
pF
IN
C
IN
Digital Input Capacitance
(Note 4) V = 0V
IN
Timing Characteristics
t
t
t
t
t
t
Data to WR Setup Time
Data to WR Hold Time
WR Pulse Width
●
●
●
●
●
●
60
0
20
–12
25
ns
ns
ns
ns
ns
ns
DS
DH
60
110
60
0
WR
LD
LD Pulse Width
55
Clear Pulse Width
WR to LD Delay Time
40
CLR
LWD
Power Supply
V
Supply Voltage
Supply Current
●
●
4.5
5
5.5
10
V
DD
I
Digital Inputs = 0V or V
µA
DD
CC
The
range.
●
denotes specifications that apply over the full operating temperature
Note 9: V = 0V. DAC register contents changed from all 0s to all 1s or
all 1s to all 0s.
REF
Note 1: Absolute Maximum Values are those beyond which the life of a
Note 10: V = 6V
at 1kHz. DAC register loaded with all 1s.
RMS
REF
device may be impaired.
Note 11: Calculation from e = √4kTRB where: k = Boltzmann constant
n
Note 2: ±1LSB = ±0.006% of full scale = ±61ppm of full scale for the
LTC1591/LTC1591-1. ±1LSB = ±0.0015% of full scale = ±15.3ppm of full
scale for the LTC1597/LTC1597-1.
(J/°K), R = resistance (Ω), T = temperature (°K), B = bandwidth (Hz).
Note 12: Midscale transition code: 01 1111 1111 1111 to 10 0000 0000
0000 for the LTC1591/LTC1591-1 and 0111 1111 1111 1111 to 1000
0000 0000 0000 for the LTC1597/LTC1597-1.
Note 3: Using internal feedback resistor.
Note 4: Guaranteed by design, not subject to test.
Note 13: R1 and R2 are measured between R1 and R
, REF and R
.
COM
COM
Note 5: I
with DAC register loaded to all 0s.
Note 14: Measured using the LT1468 op amp in unipolar mode for I/V
converter and LT1468 I/V and LT1001 reference inverter in bipolar mode.
Sample Rate = 50kHz, Signal Frequency = 1kHz, V = 5V, T = 25°C.
(OUT1)
Note 6: Typical temperature coefficient is 100ppm/°C.
Note 7: I load = 100Ω in parallel with 13pF.
REF
A
OUT1
Note 8: To 0.006% for a full-scale change, measured from the rising edge
of LD for the LTC1591/LTC1591-1. To 0.0015% for a full-scale change,
measured from the rising edge of LD for the LTC1597/LTC1597-1.
4
LTC1591/LTC1597
TYPICAL PERFOR A CE CHARACTERISTICS (LTC1591/LTC1597)
U W
Unipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency
Midscale Glitch Impulse
Full-Scale Settling Waveform
–40
–50
40
30
20
10
V
C
= 5V USING AN LT1468
= 30pF
USING AN LT1468
CC
C
V
= 30pF
FEEDBACK
REFERENCE = 6V
FEEDBACK
= 10V
REF
RMS
LD PULSE
5V/DIV
–60
–70
0
GATED
SETTLING
WAVEFORM
500µV/DIV
–80
1nV-s TYPICAL
–10
500kHz FILTER
–90
–20
–30
–40
1591/97 G02
80kHz FILTER
–100
–110
500ns/DIV
USING LT1468 OP AMP
CFEEDBACK = 20pF
0V to 10V STEP
30kHz FILTER
10k 100k
0.2
0.4
0.8
10
100
1k
0
1.0
0.6
FREQUENCY (Hz)
TIME (µs)
1591/97 G03
1591/97 G01
Bipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency, Code = All Zeros
Bipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency, Code = All Ones
–40
–50
–40
–50
V
C
= 5V USING TWO LT1468s
V
C
= 5V USING TWO LT1468s
FEEDBACK
REFERENCE = 6V
RMS
CC
CC
= 15pF
= 15pF
FEEDBACK
REFERENCE = 6V
RMS
–60
–60
–70
–70
–80
–80
500kHz FILTER
500kHz FILTER
–90
–90
80kHz FILTER
30kHz FILTER
–100
–110
–100
–110
80kHz FILTER
30kHz
FILTER
10
100
1k
10k
100k
10
100
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
1591/97 G05
1591/97 G04
Supply Current vs Input Voltage
Logic Threshold vs Supply Voltage
3.0
2.5
2.0
1.5
1.0
0.5
0
5
V
CC
= 5V
ALL DIGITAL INPUTS
TIED TOGETHER
4
3
2
1
0
0
2
3
4
5
6
7
0
1
2
3
4
5
1
SUPPLY VOLTAGE (V)
INTPUT VOLTAGE (V)
1591/97 G07
1591/97 G06
5
LTC1591/LTC1597
U W
TYPICAL PERFOR A CE CHARACTERISTICS (LTC1591)
Integral Nonlinearity
vs Reference Voltage
in Unipolar Mode
Integral Nonlinearity (INL)
Differential Nonlinearity (DNL)
1.0
0.8
1.0
0.8
1.0
0.8
0.6
0.6
0.6
0.4
0.4
0.4
0.2
0.2
0.2
0
0
0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
8192
12280
4096
16383
0
8192
12280
–10 –8 –6 –4 –2
0
2
4
6
8
10
4096
16383
DIGITAL INPUT CODE
DIGITAL INPUT CODE
REFERENCE VOLTAGE (V)
1591 G01
1591 G02
1591 G03
Differential Nonlinearity
vs Reference Voltage
in Unipolar Mode
Differential Nonlinearity
vs Reference Voltage
in Bipolar Mode
Integral Nonlinearity
vs Reference Voltage
in Bipolar Mode
1.0
0.8
1.0
0.8
1.0
0.8
0.6
0.6
0.6
0.4
0.4
0.4
0.2
0.2
0.2
0
0
0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–10 –8 –6 –4 –2
0
2
4
6
8
10
–10 –8 –6 –4 –2
0
2
4
6
8
10
–10 –8 –6 –4 –2
0
2
4
6
8
10
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
1591 G04
1591 G05
1591 G06
Integral Nonlinearity vs
Supply Voltage in Unipolar Mode
Integral Nonlinearity vs
Supply Voltage in Bipolar Mode
Differential Nonlinearity vs
Supply Voltage in Unipolar Mode
1.0
0.8
1.0
0.8
1.0
0.8
0.6
0.6
0.6
0.4
0.4
0.4
V
REF
= 10V
V
REF
= 10V
REF
REF
0.2
0.2
0.2
V
= 10V
REF
V
V
= 2.5V
V
= 2.5V
V
= 2.5V
REF
0
0
0
= 10V
= 2.5V
V
= 10V
= 2.5V
REF
REF
REF
REF
V
= 2.5V
REF
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
V
REF
= 10V
V
V
0
2
3
4
5
6
7
0
2
3
4
5
6
7
0
2
3
4
5
6
7
1
1
1
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
1591 G07
1591 G08
1591 G09
6
LTC1591/LTC1597
U W
TYPICAL PERFOR A CE CHARACTERISTICS (LTC1591)
Differential Nonlinearity vs
Supply Voltage in Bipolar Mode
Unipolar Multiplying Mode Frequency
Response vs Digital Code
1.0
0.8
0
–20
ALL BITS ON
D13 ON
D12 ON
D11 ON
D10 ON
D9 ON
D8 ON
D7 ON
D6 ON
D5 ON
D4 ON
D3 ON
D2 ON
D1 ON
0.6
0.4
–40
0.2
V
V
= 10V
REF
V
= 2.5V
0
REF
–60
= 10V
= 2.5V
REF
–0.2
–0.4
–0.6
–0.8
–1.0
V
REF
–80
D0 ON
–100
ALL BITS OFF
–120
0
2
3
4
5
6
7
1
100
1k
10k
100k
1M
10M
SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
1591G11
1591 G10
VREF
30pF
3
2
1 4 5
6
–
LTC1591
LT1468
+
VOUT
7
22
Bipolar Multiplying Mode Frequency
Response vs Digital Code
Bipolar Multiplying Mode Frequency
Response vs Digital Code
0
–20
0
–20
ALL BITS ON
ALL BITS OFF
D12 ON
D13 AND D12 ON
D13 AND D11 ON
D13 AND D10 ON
D13 AND D9 ON
D13 AND D8 ON
D13 AND D7 ON
D13 AND D6 ON
D13 AND D5 ON
D13 AND D4 ON
D13 AND D3 ON
D13 AND D2 ON
D13 AND D1 ON
D13 AND D0 ON
D12 AND D11 ON
D12 TO D10 ON
D12 TO D9 ON
D12 TO D8 ON
D12 TO D7 ON
D12 TO D6 ON
D12 TO D5 ON
D12 TO D4 ON
D12 TO D3 ON
D12 TO D2 ON
D12 TO D1 ON
D12 TO D0 ON
–40
–40
–60
–60
–80
–80
D13 ON
D13 ON
*
*
CODES FROM MIDSCALE TO FULL SCALE
CODES FROM MIDSCALE TO ZERO SCALE
–100
–100
10
100
1k
10k
100k 1M
10M
10
100
1k
10k
100k 1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
1591G13
1591 G12
*DAC ZERO VOLTAGE OUTPUT LIMITED BY BIPOLAR
ZERO ERROR TO –84dB TYPICAL (–70dB MAX)
*DAC ZERO VOLTAGE OUTPUT LIMITED BY BIPOLAR
ZERO ERROR TO –84dB TYPICAL (–70dB MAX)
V
REF
V
REF
+
+
LT1468
–
LT1468
–
V
OUT
V
OUT
12pF
12pF
12pF
12pF
15pF
–
LT1468
+
15pF
–
LT1468
+
3
2
1 4 5
3
2
1 4 5
6
6
LTC1591
LTC1591
7
22
7
22
7
LTC1591/LTC1597
U W
TYPICAL PERFOR A CE CHARACTERISTICS (LTC1597)
Integral Nonlinearity
vs Reference Voltage
in Unipolar Mode
Integral Nonlinearity (INL)
Differential Nonlinearity (DNL)
1.0
0.8
1.0
0.8
1.0
0.8
0.6
0.6
0.6
0.4
0.4
0.4
0.2
0.2
0.2
0
0
0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
32768
49152
16384
65535
0
32768
49152
–10 –8 –6 –4 –2
0
2
4
6
8
10
16384
65535
DIGITAL INPUT CODE
DIGITAL INPUT CODE
REFERENCE VOLTAGE (V)
1597 G01
1597 G02
1597 G03
Differential Nonlinearity
vs Reference Voltage
in Unipolar Mode
Differential Nonlinearity
vs Reference Voltage
in Bipolar Mode
Integral Nonlinearity
vs Reference Voltage
in Bipolar Mode
1.0
0.8
1.0
0.8
1.0
0.8
0.6
0.6
0.6
0.4
0.4
0.4
0.2
0.2
0.2
0
0
0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–10 –8 –6 –4 –2
0
2
4
6
8
10
–10 –8 –6 –4 –2
0
2
4
6
8
10
–10 –8 –6 –4 –2
0
2
4
6
8
10
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
1597 G04
1597 G06
1597 G05
Integral Nonlinearity vs
Supply Voltage in Unipolar Mode
Integral Nonlinearity vs
Supply Voltage in Bipolar Mode
Differential Nonlinearity vs
Supply Voltage in Unipolar Mode
2.0
1.5
1.0
0.8
1.0
0.8
0.6
0.6
1.0
0.4
V
V
= 10V
= 10V
0.4
REF
V
= 10V
REF
0.5
V
= 10V
REF
0.2
0.2
V
= 2.5V
REF
V
V
= 2.5V
= 2.5V
REF
V
REF
= 2.5V
0
0
0
REF
V
REF
= 10V
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
V
= 10V
= 2.5V
– 0.5
–1.0
–1.5
–2.0
REF
REF
REF
V
V
= 2.5V
REF
3
4
5
6
7
2
3
4
5
7
2
3
4
5
6
7
2
6
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
1597 G08
1597 G09
1597 G07
8
LTC1591/LTC1597
U W
TYPICAL PERFOR A CE CHARACTERISTICS (LTC1597)
Differential Nonlinearity vs
Supply Voltage in Bipolar Mode
Unipolar Multiplying Mode Frequency
Response vs Digital Code
1.0
0.8
0
–20
ALL BITS ON
D15 ON
D14 ON
D13 ON
D12 ON
D11 ON
D10 ON
D9 ON
D8 ON
D7 ON
D6 ON
D5 ON
0.6
0.4
–40
0.2
V
V
= 10V
= 10V
REF
0
–60
V
V
= 2.5V
= 2.5V
REF
REF
–0.2
–0.4
–0.6
–0.8
–1.0
D4 ON
D3 ON
D2 ON
D1 ON
REF
–80
–100
–120
D0 ON
ALL BITS OFF
2
3
4
5
6
7
100
1k
10k
100k
1M
10M
SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
1597G11
1597 G10
VREF
30pF
3
2 1 4 5
6
–
LTC1597
LT1468
+
VOUT
7
22
Bipolar Multiplying Mode Frequency
Response vs Digital Code
Bipolar Multiplying Mode Frequency
Response vs Digital Code
0
–20
–40
–60
–80
0
ALL BITS ON
ALL BITS OFF
D14 ON
D15 AND D14 ON
D15 AND D13 ON
D15 AND D12 ON
D15 AND D11 ON
D15 AND D10 ON
D15 AND D9 ON
D15 AND D8 ON
D15 AND D7 ON
D15 AND D6 ON
D15 AND D5 ON
D15 AND D4 ON
D15 AND D3 ON
D15 AND D2 ON
D14 AND D13 ON
D14 TO D12 ON
D14 TO D11 ON
D14 TO D10 ON
D14 TO D9 ON
D14 TO D8 ON
D14 TO D7 ON
D14 TO D6 ON
D14 TO D5 ON
D14 TO D4 ON
D14 TO D3 ON
D14 TO D2 ON
D14 TO D1 ON
–20
–40
–60
CODES FROM
CODES FROM
MIDSCALE
TO ZERO SCALE
MIDSCALE
TO FULL SCALE
–80
D15 AND D1 ON
D15 AND D0 ON
D14 TO D0 ON
D15 ON
D15 ON
*
*
–100
–100
10
100
1k
10k
100k 1M
10M
10
100
1k
10k
100k 1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
1597 G12
1597 G13
*DAC ZERO VOLTAGE OUTPUT LIMITED BY BIPOLAR
ZERO ERROR TO –96dB TYPICAL (–78dB MAX, A GRADE)
*DAC ZERO VOLTAGE OUTPUT LIMITED BY BIPOLAR
ZERO ERROR TO –96dB TYPICAL (–78dB MAX, A GRADE)
V
REF
V
REF
+
+
LT1468
–
LT1468
–
V
OUT
V
OUT
12pF
12pF
12pF
12pF
15pF
–
15pF
–
3
2
1 4 5
3
2
1 4 5
6
6
LTC1597
LT1468
+
LTC1597
LT1468
+
7
22
7
22
9
LTC1591/LTC1597
U
U
U
PIN FUNCTIONS
IOUT1 (Pin 6): DAC Current Output. Tie to the inverting
LTC1591
input of the current to voltage converter op amp.
REF(Pin1):Reference Inputand4-QuadrantResistorR2.
Typically ±10V, accepts up to ±25V. In 2-Quadrant mode
this is the reference input. In 4-quadrant mode, this pin is
driven by external inverting reference amplifier.
AGND (Pin 7): Analog Ground. Tie to ground.
LD(Pin8):DACDigitalInputLoadControlInput. WhenLD
is taken to a logic high, data is loaded from the input
register into the DAC register, updating the DAC output.
RCOM (Pin 2): Center Tap Point of the Two 4-Quadrant
Resistors R1 and R2. Normally tied to the inverting input
ofanexternalamplifierin4-quadrantoperation, otherwise
shorted to the REF pin. See Figures 1a and 2a.
WR (Pin 9):DAC Digital Write Control Input. When WR is
taken to a logic low, data is loaded from the digital input
pins into the 14-bit wide input register.
R1 (Pin 3): 4-Quadrant Resistor R1. In 2-quadrant opera-
tion short to the REF pin. In 4-quadrant mode tie to ROFS
(Pin 4).
DB13 to D2 (Pins 10 to 21): Digital Input Data Bits.
DGND (Pin 22): Digital Ground. Tie to ground.
V
CC (Pin23):ThePositiveSupplyInput.4.5V≤VCC ≥5.5V.
ROFS (Pin 4): Bipolar Offset Resistor. Typically swings
±10V, accepts up to ±25V. In 2-quadrant operation tie to
RFB. In 4-quadrant operation tie to R1.
Requires a bypass capacitor to ground.
DB1, DB0 (Pins 24, 25): Digital Input Data Bits.
NC (Pins 26, 27): No Connect.
RFB (Pin5):FeedbackResistor.Normallytiedtotheoutput
of the current to voltage converter op amp. Swings to
±VREF. VREF is typically ±10V.
CLR (Pin 28):Digital Clear Control Function for the DAC.
When CLR is taken to a logic low, it sets the DAC output
and all internal registers to zero code for the LTC1591 and
midscale code for the LTC1591-1.
IOUT1 (Pin 6): DAC Current Output. Tie to the inverting
LTC1597
input of the current to voltage converter op amp.
REF(Pin1):ReferenceInput and4-QuadrantResistorR2.
Typically ±10V, accepts up to ±25V. In 2-Quadrant mode
this is the reference input. In 4-quadrant mode, this pin is
driven by external inverting reference amplifier.
AGND (Pin 7): Analog Ground. Tie to ground.
LD(Pin8):DACDigitalInputLoadControlInput. WhenLD
is taken to a logic high, data is loaded from the input
register into the DAC register, updating the DAC output.
RCOM (Pin 2): Center Tap Point of the Two 4-Quadrant
Resistors R1 and R2. Normally tied to the inverting input
ofanexternalamplifierin4-quadrantoperation, otherwise
shorted to the REF pin. See Figures 1b and 2b.
WR (Pin 9):DAC Digital Write Control Input. When WR is
taken to a logic low, data is loaded from the digital input
pins into the 16-bit wide input register.
R1 (Pin 3): 4-Quadrant Resistor R1. In 2-quadrant opera-
tion short to the REF pin. In 4-quadrant mode tie to ROFS
(Pin 4).
DB15 to D4 (Pins 10 to 21): Digital Input Data Bits.
DGND (Pin 22): Digital Ground. Tie to ground.
VCC (Pin23):ThePositiveSupplyInput.4.5V≤VCC ≥5.5V.
Requires a bypass capacitor to ground.
ROFS (Pin 4): Bipolar Offset Resistor. Typically swings
±10V, accepts up to ±25V. In 2-quadrant operation tie to
RFB. In 4-quadrant operation tie to R1.
DB3 to DB0 (Pins 24 to 27): Digital Input Data Bits.
CLR (Pin 28):Digital Clear Control Function for the DAC.
When CLR is taken to a logic low, it sets the DAC output
and all internal registers to zero code for the LTC1597 and
midscale code for the LTC1597-1.
RFB (Pin5):FeedbackResistor.Normallytiedtotheoutput
of the current to voltage converter op amp. Swings to
±VREF. VREF is typically ±10V.
10
LTC1591/LTC1597
TRUTH TABLE
Table 1
CONTROL INPUTS
CLR WR
LD
REGISTER OPERATION
0
1
1
1
1
X
0
1
0
X
Reset Input and DAC Register to All 0s for LTC1591/LTC1597 and Midscale for LTC1591-1/LTC1597-1 (Asynchronous Operation)
Load Input Register with All 14/16 Data Bits
0
1
Load DAC Register with the Contents of the Input Register
1
Input and DAC Register Are Transparent
CLK = LD and WR Tied Together. The 14/16 Data Bits Are Loaded into the Input Register on the Falling Edge of the CLK and Then
Loaded into the DAC Register on the Rising Edge of the CLK
1
1
0
No Register Operation
W
BLOCK DIAGRA SM
LTC1591
48k
48k
REF
R
FB
1
2
3
5
4
12k
12k
12k
96k
12k
48k
48k
48k
48k
48k
48k
48k
96k
96k
96k
R
OFS
R
COM
R1
6
7
I
OUT1
V
CC
AGND
23
DECODER
22 DGND
28 CLR
D13
D12
D11
D10
D9
• • •
D0
(LSB)
(MSB)
LD
LOAD
8
9
RST
RST
DAC REGISTER
WR
INPUT REGISTER
WR
1591 BD
10
11
21
24
D1
25
26
NC
27
• • • •
D13
D12
D2
D0
NC
11
LTC1591/LTC1597
W
BLOCK DIAGRA SM
LTC1597
48k
48k
REF
R
FB
1
2
3
5
4
12k
12k
12k
96k
12k
48k
48k
48k
48k
48k
48k
48k
96k
96k
96k
R
OFS
R
COM
R1
6
7
I
OUT1
V
CC
AGND
23
DECODER
22 DGND
28 CLR
D15
D14
D13
D12
D11
• • •
D0
(LSB)
(MSB)
LOAD
RST
RST
LD
8
9
DAC REGISTER
WR
INPUT REGISTER
WR
1597 BD
10
11
21
24
25
26
D1
27
• • • •
D15
D14
D4
D3
D2
D0
W U
TI I G DIAGRA
W
t
WR
WR
DATA
LD
t
DS
t
DH
t
LWD
t
LD
t
CLR
CLR
1591/97TD
12
LTC1591/LTC1597
U
W U U
APPLICATIONS INFORMATION
Description
Digital Section
TheLTC1591/LTC1597are14-/16-bitmultiplying,current
output DACswithafullparallel14-/16-bitdigitalinterface.
The devices operate from a single 5V supply and provide
both unipolar 0V to –10V or 0V to 10V and bipolar ±10V
output ranges from a 10V or –10V reference input. They
have three additional precision resistors on chip for bipo-
lar operation. Refer to the block diagrams regarding the
following description.
The LTC1591/LTC1597 are 14-/16-bit wide full parallel
data bus inputs. The devices are double-buffered with two
14-/16-bit registers. The double-buffered feature permits
the update of several DACs simultaneously. The input
register is loaded directly from a 16-bit microprocessor
bus when the WR pin is brought to a logic low level. The
second register (DAC register) is updated with the data
from the input register when the LD pin is brought to a
logic high level. Updating the DAC register updates the
DAC output with the new data. To make both registers
transparent for flowthrough mode, tie WR low and LD
high. However, this defeats the deglitcher operation and
output glitch impulse may increase. The deglitcher is
activated on the rising edge of the LD pin. The versatility
of the interface also allows the use of the input and DAC
registers in a master slave or edge-triggered configura-
tion. This mode of operation occurs when WR and LD are
tied together. The asynchronous clear pin resets the
LTC1591/LTC1597 to zero scale and the LTC1591-1/
LTC1597-1 to midscale. CLR resets both the input and
DAC registers. These devices also have a power-on reset.
Table 1 shows the truth table for the LTC1591/LT1597.
The14-/16-bitDACsconsistofaprecisionR-2Rladderfor
the 11/13LSBs. The 3MSBs are decoded into seven seg-
ments of resistor value R. Each of these segments and the
R-2R ladder carries an equally weighted current of one
eighth of full scale. The feedback resistor RFB and
4-quadrant resistor ROFS have a value of R/4. 4-quadrant
resistors R1 and R2 have a magnitude of R/4. R1 and R2
together with an external op amp (see Figure 2) inverts the
referenceinputvoltageandappliesittothe14-/16-bitDAC
input REF, in 4-quadrant operation. The REF pin presents
a constant input impedance of R/8 in unipolar mode and
R/12inbipolarmode.Theoutputimpedanceofthecurrent
output pin IOUT1 varies with DAC input code. The IOUT1
capacitance due to the NMOS current steering switches
also varies with input code from 70pF to 115pF. An added
feature of these devices, especially for waveform genera-
tion, is a proprietary deglitcher that reduces glitch energy
to below 2nV-s over the DAC output voltage range.
Unipolar Mode
(2-Quadrant Multiplying, VOUT = 0V to –VREF
)
The LTC1591/LTC1597 can be used with a single op amp
to provide 2-quadrant multiplying operation as shown in
Figure 1. With a fixed –10V reference, the circuits shown
give a precision unipolar 0V to 10V output swing.
5V
0.1µF
V
REF
5
2
3
1
23
4
R1
R
COM
REF
V
CC
R
R
FB
OFS
33pF
Unipolar Binary Code Table
R
R
OFS
FB
R1
R2
I
–
+
OUT1
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
6
ANALOG OUTPUT
V
=
OUT
14
V
OUT
LTC1591
14-BIT DAC
LT1001
0V TO
–V
DATA
AGND
22
INPUTS
7
REF
MSB
LSB
11
00
1111 1111 1111
1000 0000 0000
0000 0000 0000
0000 0000 0000
–V (16,383/16,384)
REF
10 TO 21,
24, 25
–V (8,192/16,384) = –V
/2
REF
DGND
REF
01
00
–V (1/16,384)
REF
0V
WR LD CLR
28
NC NC
26 27
1591/97 F01a
9
8
WR
LD
CLR
Figure 1a. Unipolar Operation (2-Quadrant Multiplication) VOUT = 0V to –VREF
13
LTC1591/LTC1597
U
W U U
APPLICATIONS INFORMATION
5V
0.1µF
V
REF
5
2
3
1
23
4
R1
R
REF
V
CC
R
FB
R
COM
R2
OFS
33pF
Unipolar Binary Code Table
R
R
FB
OFS
R1
I
–
OUT1
6
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
V
=
ANALOG OUTPUT
OUT
16
V
LTC1597
16-BIT DAC
LT1001
0V TO
OUT
DATA
+
AGND
22
INPUTS
7
–V
REF
MSB
LSB
1111
0000
0001
0000
1111 1111 1111
1000 0000 0000
0000 0000 0000
0000 0000 0000
–V
REF
–V
REF
–V
REF
0V
(65,535/65,536)
(32,768/65,536) = –V /2
(1/65,536)
10 TO 21,
24 TO 27
DGND
REF
WR LD CLR
28
1591/97 F01b
9
8
WR
LD
CLR
Figure 1b. Unipolar Operation (2-Quadrant Multiplication) VOUT = 0V to –VREF
Bipolar Mode
(4-Quadrant Multiplying, VOUT = –VREF to VREF
offset, and a degradation of full-scale error equal to twice
the op amp offset. For the LTC1597, the same 500µV op
amp offset (2mV offset for LTC1591) will cause a 3.3LSB
zero-scale error and a 6.5LSB full-scale error with a 10V
full-scale range.
)
The LTC1591/LTC1597 contain on chip all the 4-quadrant
resistors necessary for bipolar operation. 4-quadrant
multiplying operation can be achieved with a minimum of
external components, a capacitor and a dual op amp, as
shown in Figure 2. With a fixed 10V reference, the circuit
shown gives a precision bipolar –10V to 10V output
swing.
Op amp input bias current (IBIAS) contributes only a zero-
scale error equal to IBIAS(RFB/ OFS) = IBIAS(6k). For a
R
thorough discussion of 16-bit DAC settling time and op
amp selection, refer to Application Note 74, “Component
and Measurement Advances Ensure 16-Bit DAC Settling
Time.”
Op Amp Selection
Because of the extremely high accuracy of the 14-/16-bit
LTC1591/LTC1597, thought should be given to op amp
selection in order to achieve the exceptional performance
of which the part is capable. Fortunately, the sensitivity of
INL and DNL to op amp offset has been greatly reduced
compared to previous generations of multiplying DACs.
Reference Input and Grounding
For optimum performance the reference input of the
LTC1597 should be driven by a source impedance of less
than 1kΩ. However, these DACs have been designed to
minimize source impedance effects. An 8kΩ source im-
pedance degrades both INL and DNL by 0.2LSB.
Op amp offset will contribute mostly to output offset and
gain and will have minimal effect on INL and DNL. For the
LTC1597,a500µVopampoffsetwillcauseabout0.55LSB
INLdegradationand0.15LSBDNLdegradationwitha10V
full-scale range. The main effects of op amp offset will be
a degradation of zero-scale error equal to the op amp
As with any high resolution converter, clean grounding is
important. A low impedance analog ground plane and star
grounding should be used. AGND must be tied to the star
ground with as low a resistance as possible.
14
LTC1591/LTC1597
U
W U U
APPLICATIONS INFORMATION
V
REF
5V
+
0.1µF
1/2 LT1112
–
2
5
3
1
23
4
R1
R
V
CC
REF
R
R
FB
COM
OFS
33pF
Bipolar Offset Binary Code Table
R
R
OFS
FB
R1
R2
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
I
–
OUT1
6
ANALOG OUTPUT
V
=
V
OUT
–V
14
OUT
14-BIT DAC
LTC1591-1
1/2 LT1112
+
DATA
REF
MSB
LSB
11
01
AGND
22
INPUTS
7
TO V
REF
1111 1111
1000 0000
1000 0000
0111 1111
0000 0000
1111
0000
V
V
(8,191/8,192)
(1/8,192)
REF
REF
10 TO 21,
24, 25
DGND
0000
1111
0000
00 0V
11 –V (1/8,192)
00 –V
REF
WR LD CLR
28
NC NC
26 27
REF
1591/97 F02a
9
8
WR
LD
CLR
Figure 2a. Bipolar Operation (4-Quadrant Multiplication) VOUT = –VREF to VREF
V
REF
5V
+
0.1µF
1/2 LT1112
–
2
5
3
1
23
4
R1
R
V
CC
REF
R
R
FB
COM
OFS
33pF
Bipolar Offset Binary Code Table
R
R
OFS
FB
R1
R2
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
I
–
OUT1
6
ANALOG OUTPUT
V
=
V
OUT
–V
16
OUT
LTC1597-1
1/2 LT1112
+
16-BIT DAC
DATA
REF
MSB
LSB
1111 V (32,767/32,768)
AGND
22
INPUTS
7
TO V
REF
1111 1111 1111
1000 0000 0000
1000 0000 0000
0111 1111 1111
0000 0000 0000
REF
0001V (1/32,768)
REF
10 TO 21,
24 TO 27
DGND
00000V
1111–V (1/32,768)
REF
WR LD CLR
28
0000–V
REF
1591/97 F02b
9
8
WR
LD
CLR
Figure 2b. Bipolar Operation (4-Quadrant Multiplication) VOUT = –VREF to VREF
15
LTC1591/LTC1597
TYPICAL APPLICATIONS
U
Noninverting Unipolar Operation (2-Quadrant Multiplication) VOUT = 0V to VREF
5V
+
0.1µF
1/2 LT1112
–
2
5
1
23
4
REF
V
CC
R
R
COM
R
OFS
FB
33pF
R1
3
V
REF
R
R
FB
OFS
R1
R2
I
–
OUT1
6
16
V
=
OUT
0V TO V
16-BIT DAC
LTC1597
1/2 LT1112
+
DATA
REF
AGND
22
INPUTS
7
10 TO 21,
24 TO 27
DGND
WR LD CLR
28
1591/97 F06
9
8
WR
LD
CLR
16
LTC1591/LTC1597
U
TYPICAL APPLICATIONS
16-Bit VOUT DAC Programmable Unipolar/Bipolar Configuration
16
15
14
LTC203AC
3
UNIPOLAR/
BIPOLAR
1
2
+
LT1468
2
–
15V
LT1236A-10
4
6
5V
+
0.1µF
LT1001
–
3
2
1
23
4
5
R
COM
R1
REF
V
R
OFS
R
CC
FB
15pF
R
R
FB
OFS
R1
R2
I
–
OUT1
6
16
LTC1597
LT1468
V
OUT
16-BIT DAC
DATA
+
AGND
INPUTS
7
10 TO 21,
24 TO 27
22
DGND
WR LD CLR
28
1591/97 F04
9
8
WR
LD
CLR
17
LTC1591/LTC1597
U
TYPICAL APPLICATIONS
Digital Waveform Generator
2
4
15V
LT1236A-10
6
+
–
5V
LT1001
0.1µF
3
2
5
1
23
4
R
V
CC
R1
REF
R
R
COM
R2
PHASE ACCUMULATOR
OFS
FB
15pF
n
FREQUENCY CONTROL
R
R
OFS
FB
R1
I
–
OUT1
6
PARALLEL
SERIAL
OR BYTE
LOAD
REGISTER
n
n
n
n
SIN ROM
LOOKUP
TABLE
16
DELTA
PHASE
REGISTER
M
LOWPASS
FILTER
PHASE
REGISTER
16-BIT DAC
LTC1597
LT1468
DATA
Σ
+
AGND
22
INPUTS
7
(M)(f )
C
2
f
=
O
CLOCK
n
10 TO 21,
24 TO 27
DGND
PHASE
n = 24 TO 32 BITS
TRUNCATION
16 BITS
WR LD CLR
28
1591/97 F05
9
8
f
O
18
LTC1591/LTC1597
U
PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
G Package
28-Lead Plastic SSOP (0.209)
(LTC DWG # 05-08-1640)
0.397 – 0.407*
(10.07 – 10.33)
28 27 26 25 24 23 22 21 20 19 18
16 15
17
0.301 – 0.311
(7.65 – 7.90)
5
7
8
1
2
3
4
6
9 10 11 12 13 14
0.205 – 0.212**
(5.20 – 5.38)
0.068 – 0.078
(1.73 – 1.99)
0° – 8°
0.0256
(0.65)
BSC
0.005 – 0.009
(0.13 – 0.22)
0.022 – 0.037
(0.55 – 0.95)
0.002 – 0.008
(0.05 – 0.21)
0.010 – 0.015
(0.25 – 0.38)
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
G28 SSOP 0694
N Package
28-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
1.370*
(34.789)
MAX
28 27 26 25 24
23 22 21 20
19 18 17 16 15
0.255 ± 0.015*
(6.477 ± 0.381)
1
2
3
4
5
6
7
8
9
10 11 12 13 14
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
0.130 ± 0.005
(3.302 ± 0.127)
0.020
(0.508)
MIN
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
+0.035
0.125
(3.175)
MIN
0.005
(0.127)
MIN
0.100 ± 0.010
(2.540 ± 0.254)
0.018 ± 0.003
(0.457 ± 0.076)
0.325
–0.015
+0.889
8.255
N28 1197
(
)
–0.381
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
19
LTC1591/LTC1597
TYPICAL APPLICATION
U
17-Bit Sign Magnitude DAC with Bipolar Zero Error of 140µV (0.92LSB at 17 Bits) at 25°C
16
15
14
LTC203AC
2
4
15V
1
2
3
LT1236A-10
6
5V
+
0.1µF
LT1468
–
15pF
3
2
5
1
4
23
R
R1
REF
V
CC
R
R
FB
COM
R2
OFS
SIGN
BIT
20pF
R
R
FB
OFS
R1
I
–
OUT1
6
16
DATA
INPUTS
16-BIT DAC
V
OUT
LTC1597
LT1468
+
AGND
7
10 TO 21,
24 TO 27
22
DGND
WR LD CLR
28
1591/97 F03
9
8
WR
LD
CLR
RELATED PARTS
PART NUMBER
DESCRIPTION
Precision Operational Amplifier
COMMENTS
Op Amps
LT1001
Low Offset, Low Drift
LT1112
Dual Low Power, Precision Picoamp Input Op Amp
90MHz, 22V/µs, 16-Bit Accurate Op Amp
Serial 16-Bit Current Output DACs
Serial 16-Bit Voltage Output DAC
Serial 14-Bit Voltage Output DAC
14-Bit, 200ksps 5V Sampling ADC
16-Bit, 333ksps Sampling ADC
Low Offset, Low Drift
LT1468
Precise, 1µs Settling to 0.0015%
Low Glitch, ±1LSB Maximum INL, DNL
Low Noise and Glitch Rail-to-Rail VOUT
DACs
LTC1595/LTC1596
LTC1650
LTC1658
LTC1418
LTC1604
LTC1605
Low Power, 8-Lead MSOP Rail-to-Rail VOUT
16mW Dissipation, Serial and Parallel Outputs
±2.5V Input, SINAD = 90dB, THD = 100dB
Low Power, ±10V Inputs
ADCs
Single 5V, 16-Bit 100ksps ADC
References LT1236
Precision Reference
Ultralow Drift, 5ppm/°C, High Accuracy 0.05%
15917f LT/TP 1298 4K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1998
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com
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