Preliminary Data Sheet
July 2001
LSP2916 16-Channel, High-Voltage Driver
Features
I
I
I
16 amplifier channels available in one package.
Outputs from 0 V to –298 V per channel.
Programmable output current limit (50
µA
to
300
µA).
Fixed gain set by internal resistors. (The fixed gain
for version A is –32 V/V, and –66 V/V for version
B.)
Minimal external components.
The LSP2916 requires one negative high-voltage
power supply (V
HN
) and one positive 5 V analog
power supply (V
LP
). Corresponding to the 16
channels, there are 16 negative input voltage pins,
–INx (x = 1, 2, . . .
,
16), and the corresponding 16
output pins, OUTPUTx (x = 1, 2, . . .
,
16).
+IN is the noninverting input for all 16 amplifiers,
which means all the amplifiers share the same
noninverting input. +IN should be connected to GND
for typical applications. I
BIAS
pin will set the current
limit for the amplifiers by connecting it to an external
resistor. The LSP2916 is available in a leaded
surface-mount 64-pin MQFP package.
I
I
Applications
I
I
Optical crosspoint switches.
Optical microelectromechanical systems (MEMS)
components.
Block Diagram
LSP2916
R
F
Description
This LSP2916 16-channel, high-voltage (HV) driver
is targeted for microoptomechanical systems. Each
device contains 16 high-voltage amplifiers with an
output voltage range of 0 V to –298 V. Internal gain-
setting resistors provide a fixed gain of –32 V/V,
thereby minimizing external component count. Each
amplifier can output up to 300
µA,
ideal for deflection
and control of optical MEMS mirrors. Output current
limit is programmed by an external resistor.
Additionally, careful attention was paid to minimizing
offset drift and gain variation over temperature. The
internal block diagram is shown in Figure 1. There
are two versions, version A (LSP2916A) and version
B (LSP2916B). For version A, R
F
= 8 MΩ and
R
IN
= 250 kΩ; and for version B, R
F
= 8.25 MΩ and
R
IN
= 125 kΩ. So LSP2916A has the fixed gain of
–32 V/V and LSP2916B has the fixed gain of
–66 V/V.
–IN1
R
IN
–
OUTPUT 1
+
R
F
–IN16
+IN
R
IN
–
OUTPUT 16
+
1682(F)
Figure 1. LSP2916 Internal Functional Block
Diagram
LSP2916 16-Channel, High-Voltage Driver
Preliminary Data Sheet
July 2001
Description
(continued)
Typical Application Circuit
10
Ω
0.1
µF
0.1
µF
LSP2916
V
HN
V
LP
R
F
DAC
–IN1
R
IN
–
+
OUTPUT 1
MEMS
MATRIX
R
F
R
IN
–
+
OUTPUT 16
DAC
–IN16
+IN
GND
Rib = 143 kΩ
1683(F)
Figure 2. Typical Application Circuit
2
Agere Systems Inc.
Preliminary Data Sheet
July 2001
LSP2916 16-Channel, High-Voltage Driver
Pin Information
OUTPUT10
OUTPUT11
OUTPUT12
OUTPUT13
OUTPUT14
OUTPUT15
OUTPUT16
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
OUTPUT9
NC
NC
NC
NC
NC
NC
NC
51
64
63
62
61
60
59
58
57
56
55
54
53
52
NC
–IN9
–IN10
–IN11
–IN12
NC
NC
NC
NC
NC
NC
–IN5
–IN6
–IN7
–IN8
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
50
NC
NC
–IN16
–IN15
–IN14
–IN13
+IN
NC
NC
I
BIAS
V
LP
GND
–IN4
–IN3
–IN2
–IN1
NC
OUTPUT8
OUTPUT7
OUTPUT6
OUTPUT5
OUTPUT4
OUTPUT3
OUTPUT2
OUTPUT1
V
HN
NC
NC
NC
NC
NC
NC
NC
1541.a(F)
Figure 3. External Connections
Table 1. LSP2916 Pin Order
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
NC
–IN9
–IN10
–IN11
–IN12
NC
NC
NC
NC
NC
NC
–IN5
–IN6
–IN7
–IN8
NC
Pin
Number
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Symbol
OUTPUT8
NC
OUTPUT7
NC
OUTPUT6
NC
OUTPUT5
NC
OUTPUT4
NC
OUTPUT3
NC
OUTPUT2
NC
OUTPUT1
V
HN
Pin
Number
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Symbol
NC
–IN1
–IN2
–IN3
–IN4
GND
V
LP
I
BIAS
NC
NC
+IN
–IN13
–IN14
–IN15
–IN16
NC
Pin
Number
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Symbol
OUTPUT16
NC
NC
OUTPUT15
NC
OUTPUT14
NC
OUTPUT13
NC
OUTPUT12
NC
OUTPUT11
NC
OUTPUT10
NC
OUTPUT9
3
Agere Systems Inc.
LSP2916 16-Channel, High-Voltage Driver
Preliminary Data Sheet
July 2001
Pin Information
(continued)
Table 2. LSP2916 Pin Description
Pin Name
V
LP
GND
V
HN
I
BIAS
+IN
–INx
OUTPUTx
Function
Power Supply
Ground
V
HN
< |–298| V
Current Limit Control
Analog Input
Analog Input
Analog Output
Pin Total
Counts
1
1
1
1
1
16
16
Description
5 V analog power supply.
Analog ground.
High-voltage negative supply.
Sets current limit with external resistor to GND.
Noninverting input for all channels.
Inverting input for each channel.
Output.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings
can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the
device is not implied at these or any other conditions in
excess of those given in the operational sections of the
data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.
Table 3. Absolute Maximum Ratings
Parameter
Power Supply:
V
HN
V
LP
Operating Temperature
Storage Temperature
Ambient Temperature
Min
Typ
Max
Unit
V
V
°C
°C
°C
Application Notes
LSP2916 is recommended for MEMS optical systems.
It features programmable current limit while the output
can swing up to –298 V. With all the feedback resistors
inside the chip, there is no more need for these resis-
tors in the external circuit.
Safety Handling for the High-Voltage Device
LSP2916 is designed to operate up to 298 V negative
power supply, so special care should be paid to safety
issues.
Bypass Capacitors/Protection Series Resistor for
the Power Supplies
To minimize noise coupling to the output, a 0.1
µ
F
bypass capacitor should be placed as close as
possible to all power supply pins. Additionally, to avoid
the possible degradation of the LSP2916 when V
HN
is
hot switched, a 10
Ω
series resistor between the V
HN
pin and the V
HN
power supply is required.
0
–160.0 –298.0
4.5
5.0
5.5
–5
25
85
–40
—
85
–5
25
70
Handling Precautions
Although protection circuitry has been designed for this
device, proper precautions should be taken to avoid
exposure to electrostatic discharge (ESD) during
handling and mounting. Agere Systems Inc. employs a
human-body model (HMB) and charged-device model
(CDM) for ESD-susceptibility testing and protection
design evaluation. ESD voltage thresholds are
dependent on the circuit parameters used in the
defined model. No industry-wide standard has been
adopted for CDM. However, a standard HBM
(resistance = 1500
Ω,
capacitance = 100 pF) is widely
used, and therefore, can be used for comparison
purposes. The HBM ESD threshold (>500 V) presented
here was obtained by using these circuit parameters.
4
Agere Systems Inc.
Preliminary Data Sheet
July 2001
LSP2916 16-Channel, High-Voltage Driver
Electrical Characteristics
Table 4. Electrical Characteristics
T
A
= 25 °C, V
LP
= 5 V, V
HN
= –200 V, noninverting input +IN = 0 V, I
BIAS
resistor = 143 kΩ.
Parameters
Input Characteristics
Input Resistance
Input Offset Voltage*
Input Offset Voltage
Drift
Input Noise
Input Bias Current
Input Bias Current
Power Supply
Rejection Ratio
Input Range
Gain
Voltage Gain
Gain Temperature
Coefficient
Channel-to-Channel
Gain Match
Output Resistance
Amplifier Current Limit
Output Voltage
Dynamics Characteristics
–3 dB Bandwidth
Slew Rate
Rising
Falling
Settling Time
Rising
Falling
Crosstalk
§
Adjacent Channel
Nonadjacent Channel
—
—
—
Input pulse = 0 V—4 V
C = 150 pF and
R = 10 MΩ
Input pulse = 0 V—4 V
C = 150 pF and
R = 10 MΩ
C = 150 pF
f = 1 kHz
R = 16 MΩ
—
—
—
—
—
—
—
6.5
0.62
0.54
277
309
–71
–80
—
—
—
—
—
—
—
kHz
V/µs
V/µs
µs
µs
dB
dB
G
G
TC
—
R
—
—
—
I(–IN
x)
I(+IN
)
PSRR
V
HN
V
LP
Symbol
Condition
Min
Typ
Max
Unit
2916A 2916B 2916A 2916B 2916A 2916B
–
IN = 5 V
–
IN = 0 V
–
IN = 0 V
0 °C—70 °C
f
≤
10 kHz
C = 150 pF
R = 10 MΩ
–
IN = 5 V
125
–20
—
—
12.5
–40
—
—
–0.5
30.4
—
—
63.0
200
0
4
10.3
25
0
85
52
—
32.0 66.0
–1.25 x 10
–5
2
500
20
—
—
50
40
—
—
10
33.6
—
—
69.0
kΩ
mV
µV/°C
µVrms
µA
nA
dB
dB
V
V/V
—
%
–
IN = 5 V
No load
No load
—
–
IN
–
IN = 3 mV
—
—
Amplifier Output Characteristics
—
—
—
—
Rib = 143 kΩ
—
10
85
V
HN
+ 2.5 V
†
90
100
—
125
115
V
LPD
–
3 V
‡
kΩ
µA
V
—
—
—
*
Input offset voltage = (V
OFFSET
voltage/gain), the test condition is for the offset output voltage.
† –IN = 10 V.
‡ –IN = –0.25 V.
§ Using an OP27 as buffer, test measurement was taken at the output of OP27.
Agere Systems Inc.
5
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