LTC1599
16-Bit Byte Wide,
Low Glitch Multiplying DAC with
4-Quadrant Resistors
FEATURES
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■
■
■
■
■
■
■
DESCRIPTIO
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
2
µ
s Settling Time to 0.0015% (with LT
®
1468)
Asynchronous Clear Pin Resets to Zero Scale
or Midscale
Glitch Impulse: 1.5nV-s
24-Lead SSOP Package
Low Power Consumption: 10µW Typ
Power-On Reset to Zero Scale or Midscale
2-Byte Parallel Digital Interface
Available in 24-Lead SSOP and PDIP Packages
APPLICATIO S
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Process Control and Industrial Automation
Direct Digital Waveform Generation
Software-Controlled Gain Adjustment
Automatic Test Equipment
The LTC
®
1599 is a 2-byte parallel input 16-bit multiplying
current output DAC that operates from a single 5V supply.
INL and DNL are accurate to 1LSB over the industrial
temperature range in both 2- and 4-quadrant multiplying
modes. True 16-bit 4-quadrant multiplication is achieved
with on-chip 4-quadrant multiplication resistors.
The LTC1599 is available in 24-pin PDIP and SSOP packages
and is specified over the commercial and industrial tempera-
ture ranges. The device includes an internal deglitcher circuit
that reduces the glitch impulse to 1.5nV-s (typ). The asyn-
chronous CLR pin resets the LTC1599 to zero scale when the
CLVL pin is at a logic low and to midscale when the CLVL pin
is at a logic high.
For a full 16-bit wide parallel interface current output DAC,
refer to the LTC1597 data sheet. For serial interface 16-bit
current output DACs, refer to the LTC1595/LTC1596 data
sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
V
REF
A 16-Bit, 4-Quadrant Multiplying DAC with a Minimum of External Components
–V
REF
INTEGRAL NONLINEARITY (LSB)
4
R1
8
DATA
INPUTS
14 TO 18,
21 TO 23
MLBYTE
13
MLBYTE
R1
3
R
COM
R2
LTC1599
16-BIT DAC
I
OUT2S
DGND
19
9
WR LD CLR
WR
LD
CLR
CLVL
12
11
24
CLVL
10
+
I
OUT2F
8
3
–
–
2
+
3
5V
LT1468
6
0.1µF
15pF
2
1
20 5
V
CC
R
OFS
R
OFS
R
FB
I
OUT1
7
2
V
REF
LT1468
6
V
OUT
=
–V
REF
6
R
FB
15pF
R2 REF
1599 TA01
U
Integral Nonlinearity
1.0
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1.0
0
49152
32768
16384
DIGITAL INPUT CODE
65535
1599 G08
U
U
sn1599 1599fs
1
LTC1599
ABSOLUTE
MAXIMUM
RATINGS
(Note 1)
PACKAGE/ORDER INFORMATION
TOP VIEW
REF
R2
R
COM
R1
R
OFS
R
FB
I
OUT1
I
OUT2F
I
OUT2S
1
2
3
4
5
6
7
8
9
24 CLR
23 D0
22 D1
21 D2
20 V
CC
19 DGND
18 D3
17 D4
16 D5
15 D6
14 D7
13 MLBYTE
N PACKAGE
24-LEAD PDIP
V
CC
to DGND .............................................. – 0.3V to 7V
REF, R
OFS
, R
FB
, R1, R2 to DGND ..........................
±25V
R
COM
........................................................ – 0.3V to 12V
Digital Inputs to DGND ............... – 0.3V to (V
CC
+ 0.3V)
I
OUT1
, I
OUT2F
, I
OUT2S
to DGND .... – 0.3V to( V
CC
+ 0.3V)
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range
LTC1599C ............................................... 0°C to 70°C
LTC1599I ............................................ – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
LTC1599ACG
LTC1599BCG
LTC1599AIG
LTC1599BIG
LTC1599ACN
LTC1599BCN
LTC1599AIN
LTC1599BIN
CLVL 10
LD 11
WR 12
G PACKAGE
24-LEAD PLASTIC SSOP
T
JMAX
= 125°C,
θ
JA
= 95°C/ W (G)
T
JMAX
= 125°C,
θ
JA
= 58°C/ W (N)
Consult factory for Military grade parts.
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V
±10%,
V
REF
= 10V, I
OUT1
= I
OUT2F
= I
OUT2S
= DGND = 0V,
T
A
= T
MIN
to T
MAX
unless otherwise noted.
SYMBOL PARAMETER
Accuracy
Resolution
Monotonicity
INL
DNL
GE
Integral Nonlinearity
Differential Nonlinearity
Gain Error
T
A
= 25°C (Note 2)
T
MIN
to T
MAX
T
A
= 25°C
T
MIN
to T
MAX
Unipolar Mode
T
A
= 25°C (Note 3)
T
MIN
to T
MAX
Bipolar Mode
T
A
= 25°C (Note 3)
T
MIN
to T
MAX
Gain Temperature Coefficient
Bipolar Zero Error
I
LKG
PSRR
OUT1 Leakage Current
Power Supply Rejection
∆Gain/∆Temperature
(Note 4)
T
A
= 25°C
T
MIN
to T
MAX
T
A
= 25°C (Note 5)
T
MIN
to T
MAX
V
CC
= 5V
±10%
●
●
●
●
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
16
16
LTC1599B
TYP
MAX
MIN
16
16
LTC1599A
TYP
MAX
UNITS
Bits
Bits
±2
±2
±1
±1
±16
±24
±16
±24
1
3
±10
±16
±5
±15
±1
±2
±0.25
±0.35
±0.2
±0.2
2
3
2
3
1
±1
±1
±1
±1
±16
±16
±16
±16
3
±5
±8
±5
±15
●
●
●
●
●
●
ppm/°C
LSB
LSB
nA
nA
LSB/V
±1
±2
sn1599 1599fs
2
U
W
U
U
W W
W
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LTC1599
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V
±10%,
V
REF
= 10V, I
OUT1
= I
OUT2F
= I
OUT2S
= DGND = 0V,
T
A
= T
MIN
to T
MAX
unless otherwise noted.
SYMBOL
R
REF
R1, R2
R
OFS
, R
FB
PARAMETER
DAC Input Resistance (Unipolar)
R1, R2 Resistance (Bipolar)
Feedback and Offset Resistances
Output Current Settling Time
Midscale Glitch Impulse
Digital-to-Analog Glitch Impulse
Multiplying Feedthrough Error
THD
Total Harmonic Distortion
Output Noise Voltage Density
Analog Outputs (Note 4)
C
OUT
Output Capacitance (Note 4)
DAC Register Loaded to All 1s: C
OUT1
DAC Register Loaded to All 0s: C
OUT1
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
Reference Input
(Note 6)
CONDITIONS
●
●
●
MIN
4.5
9
9
TYP
6
14
13.5
1
1.5
1
1
108
10
115
70
MAX
10
20
20
UNITS
kΩ
kΩ
kΩ
µs
nV-s
nV-s
mV
P-P
dB
nV/√Hz
(Notes 6, 13)
(Note 6)
(Notes 7, 8)
(Note 12)
(Note 9)
V
REF
=
±10V,
10kHz Sine Wave
(Note 10)
(Note 11)
AC Performance (Note 4)
130
80
pF
pF
V
Digital Inputs
V
IH
V
IL
I
IN
C
IN
t
DS
t
DH
t
WR
t
BWS
t
BWH
t
LD
t
CLR
t
LWD
V
CC
I
CC
Digital Input High Voltage
Digital Input Low Voltage
Digital Input Current
Digital Input Capacitance
Data to WR Setup Time
Data to WR Hold Time
WR Pulse Width
MLBYTE to WR Setup Time
MLBYTE to WR Hold Time
LD Pulse Width
Clear Pulse Width
WR to LD Delay Time
Supply Voltage
Supply Current
Digital Inputs = 0V or V
CC
(Note 4) V
IN
= 0V
2.4
0.8
0.001
±1
8
80
0
80
0
0
150
150
0
4.5
5
5.5
10
20
–12
25
–12
–12
55
50
V
µA
pF
ns
ns
ns
ns
ns
ns
ns
ns
V
µA
●
●
●
●
●
●
●
●
●
●
●
Timing Characteristics
Power Supply
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
±1LSB
=
±0.0015%
of full scale =
±15.3ppm
of full scale.
Note 3:
Using internal feedback resistor.
Note 4:
Guaranteed by design, not subject to test.
Note 5:
I
(OUT1)
with DAC register loaded to all 0s.
Note 6:
Typical temperature coefficient is 100ppm/°C.
Note 7:
I
OUT1
load = 100Ω in parallel with 13pF.
Note 8:
To 0.0015% for a full-scale change, measured from the falling
edge of LD.
Note 9:
V
REF
= 0V. DAC register contents changed from all 0s to all 1s or
all 1s to all 0s. LD high, WR and MLBYTE pulsed.
Note 10:
V
REF
= 6V
RMS
at 1kHz. DAC register loaded with all 1s.
R
L
= 600Ω. Unipolar mode op amp = LT1468.
Note 11:
Calculation from e
n
=
√4kTRB
where: k = Boltzmann constant
(J/°K), R = resistance (Ω), T = temperature (°K), B = bandwidth (Hz).
Note 12:
Midscale transition code 0111 1111 1111 1111 to
1000 0000 0000 0000.
Note 13:
R1 and R2 are measured between R1 and R
COM
, R2 and R
COM
.
sn1599 1599fs
3
LTC1599
TYPICAL PERFOR A CE CHARACTERISTICS
Midscale Glitch Impulse
40
30
USING AN LT1468
C
FEEDBACK
= 30pF
V
REF
= 10V
SIGNAL/(NOISE + DISTORTION) (dB)
OUTPUT VOLTAGE (mV)
20
10
0
–10
–20
– 30
– 40
0
0.2
0.4
0.6
TIME (µs)
0.8
1.0
1599 G01
1.5nV-s TYPICAL
Bipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency, Code = All Zeros
– 40
SIGNAL/(NOISE + DISTORTION) (dB)
– 50
– 60
– 70
– 80
SIGNAL/(NOISE + DISTORTION) (dB)
– 60
– 70
– 80
SUPPLY CURRENT (mA)
V
CC
= 5V USING TWO LT1468s
C
FEEDBACK
= 15pF
R
L
= 600Ω
REFERENCE = 6V
RMS
500kHz FILTER
– 90
80kHz FILTER
30kHz
FILTER
10
100
1k
10k
FREQUENCY (Hz)
100k
1599 G04
–100
–110
Logic Threshold vs Supply Voltage
3.0
INTEGRAL NONLINEARITY (LSB)
2.5
LOGIC THRESHOLD (V)
2.0
1.5
1.0
0.5
0
DIFFERENTIAL NONLINEARITY (LSB)
0
1
5
2
3
4
SUPPLY VOLTAGE (V)
4
U W
6
7
1599 G07
Full-Scale Settling Waveform
– 40
– 50
– 60
– 70
– 80
Unipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency
V
CC
= 5V USING AN LT1468
C
FEEDBACK
= 30pF
R
L
= 600Ω
REFERENCE = 6V
RMS
LD PULSE
5V/DIV
GATED
SETTLING
WAVEFORM
500µV/DIV
500kHz FILTER
– 90
80kHz FILTER
30kHz FILTER
10
100
1k
10k
FREQUENCY (Hz)
100k
1599 G03
500ns/DIV
USING LT1468 OP AMP
C
FEEDBACK
= 20pF
0V to 10V STEP
1599 G02
–100
–110
Bipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency, Code = All Ones
– 40
– 50
V
CC
= 5V USING TWO LT1468s
C
FEEDBACK
= 15pF
R
L
= 600Ω
REFERENCE = 6V
RMS
5
Supply Current vs Input Voltage
V
CC
= 5V
ALL DIGITAL INPUTS
TIED TOGETHER
4
3
500kHz FILTER
– 90
80kHz FILTER
30kHz FILTER
2
1
–100
–110
10
100
1k
10k
FREQUENCY (Hz)
100k
1599 G05
0
0
1
3
2
INTPUT VOLTAGE (V)
4
5
1599 G06
Integral Nonlinearity (INL)
1.0
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1.0
0
49152
32768
16384
DIGITAL INPUT CODE
65535
1599 G08
Differential Nonlinearity (DNL)
1.0
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1.0
0
49152
32768
16384
DIGITAL INPUT CODE
65535
1598 G09
sn1599 1599fs
LTC1599
TYPICAL PERFOR A CE CHARACTERISTICS
Integral Nonlinearity
vs Reference Voltage
in Unipolar Mode
1.0
0.8
INTEGRAL NONLINEARITY (LSB)
INTEGRAL NONLINEARITY (LSB)
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1.0
–10 – 8 – 6 – 4 – 2 0 2 4 6
REFERENCE VOLTAGE (V)
8
10
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1.0
–10 – 8 – 6 – 4 – 2 0 2 4 6
REFERENCE VOLTAGE (V)
8
10
DIFFERENTIAL NONLINEARITY (LSB)
Differential Nonlinearity
vs Reference Voltage
in Bipolar Mode
1.0
1.0
0.8
INTEGRAL NONLINEARITY (LSB)
DIFFERENTIAL NONLINEARITY (LSB)
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1.0
–10 – 8 – 6 – 4 – 2 0 2 4 6
REFERENCE VOLTAGE (V)
8
10
Integral Nonlinearity vs
Suppy Voltage in Bipolar Mode
2.0
DIFFERENTIAL NONLINEARITY (LSB)
INTEGRAL NONLINEARITY (LSB)
1.5
1.0
0.5
0
V
REF
= 10V
V
REF
= 2.5V
–1.0
–1.5
–2.0
2
3
4
5
6
SUPPLY VOLTAGE (V)
7
1599 G15
– 0.5
U W
1599 G10
Integral Nonlinearity
vs Reference Voltage
in Bipolar Mode
1.0
0.8
1.0
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
Differential Nonlinearity
vs Reference Voltage
in Unipolar Mode
–1.0
–10 – 8 – 6 – 4 – 2 0 2 4 6
REFERENCE VOLTAGE (V)
8
10
1599 G11
1599 G12
Integral Nonlinearity vs
Suppy Voltage in Unipolar Mode
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1.0
2
3
4
5
6
SUPPLY VOLTAGE (V)
7
1599 G14
V
REF
= 10V
V
REF
= 2.5V
V
REF
= 10V
V
REF
= 2.5V
1599 G13
Differential Nonlinearity vs
Suppy Voltage in Unipolar Mode
1.0
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1.0
2
3
4
5
6
SUPPLY VOLTAGE (V)
7
1599 G16
V
REF
= 10V
V
REF
= 2.5V
V
REF
= 10V
V
REF
= 2.5V
V
REF
= 10V
V
REF
= 2.5V
sn1599 1599fs
5
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