ISL28470EVAL1Z Intersil, ISL28470EVAL1Z Datasheet - Page 2

• Manufacturer Part Number: ISL28470EVAL1Z
• Description: EVALUATION PLATFORM ISL28470
• Manufacturer: Intersil

Specifications of ISL28470EVAL1Z

• Channels Per Ic: 4 - Quad
• Amplifier Type: Instrumentation
• Output Type: Single-Ended, Rail-to-Rail
• Slew Rate: 0.5 V/µs
• -3db Bandwidth: 240kHz
• Current - Output / Channel: 29mA
• Operating Temperature: -40°C ~ 125°C
• Current - Supply (main Ic): 260µA
• Voltage - Supply, Single/dual (±): 2.4 V ~ 5.5 V, ±1.2 V ~ 2.75 V
• Board Type: Fully Populated
• Utilized Ic / Part: ISL28470
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Amplifier Configuration
The schematic of each of the 4 Op Amps with the
components supplied is shown in Figure 2. The circuit
implements a differential input instrumentation amp with a
closed loop gain of 101. The circuit can operate from a
single 2.4VDC to +5VDC supply, or from dual supplies from
±1.2VDC to ±2.5VDC.The output common mode reference
is applied to the VREF pin, and has a range from ground
(VM) to VP.
User-selectable Options
Component pads are included to enable a variety of user-
selectable circuits to be added to the amplifier differential
inputs, the VREF input, and the amplifier feedback loop. A
voltage divider and filter option can be added to establish a
power supply tracking common mode reference at the VREF
input, or a coaxial connection to the ISL28470 FB+ pin can
be made at the FB+ BNC connector. The differential inputs
have additional resistor placements for adding input
attenuation, or to establish input DC offsets through the
VREF pin.
ISL28470EVAL1Z Components Parts List
C
C
C
C
C
D
U1
R
R
R
R
R
R
R
R
R
R
R
S
1
1
7
9
3
11
1
13
35
71
18
60
17
59
20
62
1
5
, C
, C
, C
-C
, D
-R
-R
-S
-C
, R
-R
, R
, R
, R
, R
, R
, R
, R
4
6
4
12
2
8
10
2
18
38
14
73
21
63
28
61
23
64
,R
, R
, R
-R
, R
, R
, R
, R
, R
41
16
29
31
75
66
39
65
68
, R
, R
, R
, R
, R
, R
44
19
32
34
50
67
DEVICE #
, R
, R
, R
, R
, R
46
22
40
42
70
-R
, R
, R
, R
, R
49
24
43
45
72
, R
-R
, R
, R
, R
52
27
51
53
74
2
, R
, R
, R
, R
, R
55
30
54
56
76
(Figure 2)
, R
, R
, R
, R
(Figure 3)
69
33
58
57
,
,
,
,
CAP-TANTALUM, SMD, D,4.7µF, 50V, 10%, LOW ESR, ROHS Power Supply Decoupling
CAP, SMD, 0603, 0.01µF, 25V, 10%, X7R, ROHS
CAP, SMD, 0805, 0.1µF, 25V,10%, X7R, ROHS
CAP, SMD, 0805, DNP-PLACE HOLDER, ROHS
CAP, SMD, 0805, DNP-PLACE HOLDER, ROHS
DIODE-RECTIFIER, SMD, MELF, 2 Ld, 50V, 1A, GPP, ROHS
ISL28470FAZIC INSTRUMENTATION AMP, 28P, QSOP,
ROHS
RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER
RES, SMD, 0603, 0Ω, 1/16W, TF, ROHS
RES, SMD, 0603, 1k, 1/10W, 1%, TF, ROHS
RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS
RES, SMD, 0603, 100k, 1/10W, 1%, TF, ROHS
RES, SMD, 0805, 0Ω, 1/8W, TF, ROHS
RES, SMD, 0805, DNP-PLACE HOLDER, ROHS
SWITCH-SEALED MINI TOGGLE, TH, 3P, SP, ON/NONE/ON,
GOLD
Application Note 1289
DESCRIPTION
FIGURE 3. COMPONENT-SELECTABLE OPTIONS
FB+A
-INA
+INA
J
J
J
9
8
10
V-
DNP
R
R
R
DNP
DNP
0
21
0
13
18
R
R
DNP
22
19
R
6
C
J
VREFA
R
0
4
3
14
R
100k
Power Supply Decoupling
Power Supply Decoupling
Optional VREF Filter
Not Populated
Optional Amplifier Feedback Caps
Not Populated
Reverse Power Protection
User Selectable Resistors
Not Populated
0Ω User Selectable Resistors
R
R
0Ω User Selectable Resistors
User Selectable Resistors
Not Populated
Enable/Disable Select Switches
VREFA
20
OPEN
G
F
DNP
R
Gain Resistors
Gain Resistors
100k
R
5
VREFA
23
DNP
R
R
COMMENTS
1k
V+
15
17
February 12, 2007
DNP
R
16
AN1289.0